/*
* Copyright 2003-2009 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.codehaus.groovy.classgen;
import groovy.lang.GroovyRuntimeException;
import org.codehaus.groovy.GroovyBugError;
import org.codehaus.groovy.ast.*;
import org.codehaus.groovy.ast.expr.*;
import org.codehaus.groovy.ast.stmt.*;
import org.codehaus.groovy.classgen.asm.*;
import org.codehaus.groovy.control.CompilerConfiguration;
import org.codehaus.groovy.control.SourceUnit;
import org.codehaus.groovy.runtime.MetaClassHelper;
import org.codehaus.groovy.runtime.ScriptBytecodeAdapter;
import org.codehaus.groovy.syntax.RuntimeParserException;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.*;
import java.util.*;
/**
* Generates Java class versions of Groovy classes using ASM.
*
* @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
* @author <a href="mailto:b55r@sina.com">Bing Ran</a>
* @author <a href="mailto:blackdrag@gmx.org">Jochen Theodorou</a>
* @author <a href='mailto:the[dot]mindstorm[at]gmail[dot]com'>Alex Popescu</a>
* @author Alex Tkachman
* @version $Revision$
*/
public class AsmClassGenerator extends ClassGenerator {
private final ClassVisitor cv;
private GeneratorContext context;
private String sourceFile;
// fields and properties
static final MethodCallerMultiAdapter setField = MethodCallerMultiAdapter.newStatic(ScriptBytecodeAdapter.class, "setField", false, false);
static final MethodCallerMultiAdapter getField = MethodCallerMultiAdapter.newStatic(ScriptBytecodeAdapter.class, "getField", false, false);
static final MethodCallerMultiAdapter setGroovyObjectField = MethodCallerMultiAdapter.newStatic(ScriptBytecodeAdapter.class, "setGroovyObjectField", false, false);
static final MethodCallerMultiAdapter getGroovyObjectField = MethodCallerMultiAdapter.newStatic(ScriptBytecodeAdapter.class, "getGroovyObjectField", false, false);
static final MethodCallerMultiAdapter setFieldOnSuper = MethodCallerMultiAdapter.newStatic(ScriptBytecodeAdapter.class, "setFieldOnSuper", false, false);
static final MethodCallerMultiAdapter getFieldOnSuper = MethodCallerMultiAdapter.newStatic(ScriptBytecodeAdapter.class, "getFieldOnSuper", false, false);
public static final MethodCallerMultiAdapter setProperty = MethodCallerMultiAdapter.newStatic(ScriptBytecodeAdapter.class, "setProperty", false, false);
static final MethodCallerMultiAdapter getProperty = MethodCallerMultiAdapter.newStatic(ScriptBytecodeAdapter.class, "getProperty", false, false);
static final MethodCallerMultiAdapter setGroovyObjectProperty = MethodCallerMultiAdapter.newStatic(ScriptBytecodeAdapter.class, "setGroovyObjectProperty", false, false);
static final MethodCallerMultiAdapter getGroovyObjectProperty = MethodCallerMultiAdapter.newStatic(ScriptBytecodeAdapter.class, "getGroovyObjectProperty", false, false);
static final MethodCallerMultiAdapter setPropertyOnSuper = MethodCallerMultiAdapter.newStatic(ScriptBytecodeAdapter.class, "setPropertyOnSuper", false, false);
static final MethodCallerMultiAdapter getPropertyOnSuper = MethodCallerMultiAdapter.newStatic(ScriptBytecodeAdapter.class, "getPropertyOnSuper", false, false);
// spread expressions
static final MethodCaller spreadMap = MethodCaller.newStatic(ScriptBytecodeAdapter.class, "spreadMap");
static final MethodCaller despreadList = MethodCaller.newStatic(ScriptBytecodeAdapter.class, "despreadList");
// Closure
static final MethodCaller getMethodPointer = MethodCaller.newStatic(ScriptBytecodeAdapter.class, "getMethodPointer");
// unary plus, unary minus, bitwise negation
static final MethodCaller unaryPlus = MethodCaller.newStatic(ScriptBytecodeAdapter.class, "unaryPlus");
static final MethodCaller unaryMinus = MethodCaller.newStatic(ScriptBytecodeAdapter.class, "unaryMinus");
static final MethodCaller bitwiseNegate = MethodCaller.newStatic(ScriptBytecodeAdapter.class, "bitwiseNegate");
// type conversions
static final MethodCaller createListMethod = MethodCaller.newStatic(ScriptBytecodeAdapter.class, "createList");
static final MethodCaller createMapMethod = MethodCaller.newStatic(ScriptBytecodeAdapter.class, "createMap");
static final MethodCaller createRangeMethod = MethodCaller.newStatic(ScriptBytecodeAdapter.class, "createRange");
// wrapper creation methods
static final MethodCaller createPojoWrapperMethod = MethodCaller.newStatic(ScriptBytecodeAdapter.class, "createPojoWrapper");
static final MethodCaller createGroovyObjectWrapperMethod = MethodCaller.newStatic(ScriptBytecodeAdapter.class, "createGroovyObjectWrapper");
// constructor calls with this() and super()
static final MethodCaller selectConstructorAndTransformArguments = MethodCaller.newStatic(ScriptBytecodeAdapter.class, "selectConstructorAndTransformArguments");
// exception blocks list
private Map<String,ClassNode> referencedClasses = new HashMap<String,ClassNode>();
private boolean passingParams;
public static final boolean CREATE_DEBUG_INFO = true;
public static final boolean CREATE_LINE_NUMBER_INFO = true;
public static final boolean ASM_DEBUG = false; // add marker in the bytecode to show source-bytecode relationship
private int lineNumber = -1;
private ASTNode currentASTNode = null;
private Map genericParameterNames = null;
private SourceUnit source;
private WriterController controller;
public AsmClassGenerator(
SourceUnit source, GeneratorContext context,
ClassVisitor classVisitor, String sourceFile
) {
this.source = source;
this.context = context;
this.cv = classVisitor;
this.sourceFile = sourceFile;
genericParameterNames = new HashMap();
}
public SourceUnit getSourceUnit() {
return source;
}
// GroovyClassVisitor interface
//-------------------------------------------------------------------------
public void visitClass(ClassNode classNode) {
referencedClasses.clear();
this.controller = new WriterController();
this.controller.init(this, context, cv, classNode);
if (controller.shouldOptimizeForInt()) {
OptimizingStatementWriter.setNodeMeta(classNode);
}
try {
cv.visit(
getBytecodeVersion(),
adjustedModifiers(classNode.getModifiers()),
controller.getInternalClassName(),
BytecodeHelper.getGenericsSignature(classNode),
controller.getInternalBaseClassName(),
BytecodeHelper.getClassInternalNames(classNode.getInterfaces())
);
cv.visitSource(sourceFile, null);
if (classNode.getName().endsWith("package-info")) {
PackageNode packageNode = classNode.getPackage();
if (packageNode != null) {
// pull them out of package node but treat them like they were on class node
for (AnnotationNode an : packageNode.getAnnotations()) {
// skip built-in properties
if (an.isBuiltIn()) continue;
if (an.hasSourceRetention()) continue;
AnnotationVisitor av = getAnnotationVisitor(classNode, an, cv);
visitAnnotationAttributes(an, av);
av.visitEnd();
}
}
cv.visitEnd();
return;
} else {
visitAnnotations(classNode, cv);
}
if (classNode.isInterface()) {
ClassNode owner = classNode;
if (owner instanceof InnerClassNode) {
owner = owner.getOuterClass();
}
String outerClassName = owner.getName();
String name = outerClassName + "$" + context.getNextInnerClassIdx();
controller.setInterfaceClassLoadingClass(
new InterfaceHelperClassNode (
owner, name, 4128, ClassHelper.OBJECT_TYPE,
controller.getCallSiteWriter().getCallSites()));
super.visitClass(classNode);
createInterfaceSyntheticStaticFields();
} else {
super.visitClass(classNode);
MopWriter mopWriter = new MopWriter(controller);
mopWriter.createMopMethods();
controller.getCallSiteWriter().generateCallSiteArray();
createSyntheticStaticFields();
}
for (Iterator iter = innerClasses.iterator(); iter.hasNext();) {
ClassNode innerClass = (ClassNode) iter.next();
String innerClassName = innerClass.getName();
String innerClassInternalName = BytecodeHelper.getClassInternalName(innerClassName);
{
int index = innerClassName.lastIndexOf('$');
if (index >= 0) innerClassName = innerClassName.substring(index + 1);
}
String outerClassName = controller.getInternalClassName(); // default for inner classes
MethodNode enclosingMethod = innerClass.getEnclosingMethod();
if (enclosingMethod != null) {
// local inner classes do not specify the outer class name
outerClassName = null;
innerClassName = null;
}
//int mods = adjustedModifiers(innerClass.getModifiers());
int mods = innerClass.getModifiers();
cv.visitInnerClass(
innerClassInternalName,
outerClassName,
innerClassName,
mods);
}
//TODO: an inner class should have an entry of itself
cv.visitEnd();
} catch (GroovyRuntimeException e) {
e.setModule(classNode.getModule());
throw e;
}
}
/*
* Classes but not interfaces should have ACC_SUPER set
*/
private int adjustedModifiers(int modifiers) {
boolean needsSuper = (modifiers & ACC_INTERFACE) == 0;
return needsSuper ? modifiers | ACC_SUPER : modifiers;
}
public void visitGenericType(GenericsType genericsType) {
ClassNode type = genericsType.getType();
genericParameterNames.put(type.getName(), genericsType);
}
private String[] buildExceptions(ClassNode[] exceptions) {
if (exceptions == null) return null;
String[] ret = new String[exceptions.length];
for (int i = 0; i < exceptions.length; i++) {
ret[i] = BytecodeHelper.getClassInternalName(exceptions[i]);
}
return ret;
}
protected void visitConstructorOrMethod(MethodNode node, boolean isConstructor) {
lineNumber = -1;
Parameter[] parameters = node.getParameters();
String methodType = BytecodeHelper.getMethodDescriptor(node.getReturnType(), parameters);
String signature = BytecodeHelper.getGenericsMethodSignature(node);
int modifiers = node.getModifiers();
if (isVargs(node.getParameters())) modifiers |= Opcodes.ACC_VARARGS;
MethodVisitor mv = cv.visitMethod(modifiers, node.getName(), methodType, signature, buildExceptions(node.getExceptions()));
controller.setMethodVisitor(mv);
visitAnnotations(node, mv);
for (int i = 0; i < parameters.length; i++) {
visitParameterAnnotations(parameters[i], i, mv);
}
if (controller.getClassNode().isAnnotationDefinition() && !node.isStaticConstructor()) {
visitAnnotationDefault(node, mv);
} else if (!node.isAbstract()) {
Statement code = node.getCode();
mv.visitCode();
// fast path for getter/setters etc.
if (code instanceof BytecodeSequence && ((BytecodeSequence)code).getInstructions().size() == 1 && ((BytecodeSequence)code).getInstructions().get(0) instanceof BytecodeInstruction) {
((BytecodeInstruction)((BytecodeSequence)code).getInstructions().get(0)).visit(mv);
} else {
visitStdMethod(node, isConstructor, parameters, code);
}
// we use this NOP to have a valid jump target for the various labels
//mv.visitInsn(NOP);
mv.visitMaxs(0, 0);
}
mv.visitEnd();
}
private void visitStdMethod(MethodNode node, boolean isConstructor, Parameter[] parameters, Statement code) {
MethodVisitor mv = controller.getMethodVisitor();
if (isConstructor && (code == null || !((ConstructorNode) node).firstStatementIsSpecialConstructorCall())) {
// invokes the super class constructor
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, BytecodeHelper.getClassInternalName(controller.getClassNode().getSuperClass()), "<init>", "()V");
}
controller.getCompileStack().init(node.getVariableScope(), parameters);
controller.getCallSiteWriter().makeSiteEntry();
// handle body
super.visitConstructorOrMethod(node, isConstructor);
controller.getCompileStack().clear();
if (node.isVoidMethod()) {
mv.visitInsn(RETURN);
} else {
// we make a dummy return for label ranges that reach here
ClassNode type = node.getReturnType().redirect();
if (ClassHelper.isPrimitiveType(type)) {
mv.visitLdcInsn(0);
controller.getOperandStack().push(ClassHelper.int_TYPE);
controller.getOperandStack().doGroovyCast(type);
BytecodeHelper.doReturn(mv, type);
controller.getOperandStack().remove(1);
} else {
mv.visitInsn(ACONST_NULL);
BytecodeHelper.doReturn(mv, type);
}
}
}
void visitAnnotationDefaultExpression(AnnotationVisitor av, ClassNode type, Expression exp) {
if (exp instanceof ClosureExpression) {
ClassNode closureClass = controller.getClosureWriter().getOrAddClosureClass((ClosureExpression) exp, ACC_PUBLIC);
Type t = Type.getType(BytecodeHelper.getTypeDescription(closureClass));
av.visit(null, t);
} else if (type.isArray()) {
ListExpression list = (ListExpression) exp;
AnnotationVisitor avl = av.visitArray(null);
ClassNode componentType = type.getComponentType();
for (Expression lExp : list.getExpressions()) {
visitAnnotationDefaultExpression(avl, componentType, lExp);
}
} else if (ClassHelper.isPrimitiveType(type) || type.equals(ClassHelper.STRING_TYPE)) {
ConstantExpression constExp = (ConstantExpression) exp;
av.visit(null, constExp.getValue());
} else if (ClassHelper.CLASS_Type.equals(type)) {
ClassNode clazz = exp.getType();
Type t = Type.getType(BytecodeHelper.getTypeDescription(clazz));
av.visit(null, t);
} else if (type.isDerivedFrom(ClassHelper.Enum_Type)) {
PropertyExpression pExp = (PropertyExpression) exp;
ClassExpression cExp = (ClassExpression) pExp.getObjectExpression();
String desc = BytecodeHelper.getTypeDescription(cExp.getType());
String name = pExp.getPropertyAsString();
av.visitEnum(null, desc, name);
} else if (type.implementsInterface(ClassHelper.Annotation_TYPE)) {
AnnotationConstantExpression avExp = (AnnotationConstantExpression) exp;
AnnotationNode value = (AnnotationNode) avExp.getValue();
AnnotationVisitor avc = av.visitAnnotation(null, BytecodeHelper.getTypeDescription(avExp.getType()));
visitAnnotationAttributes(value,avc);
} else {
throw new GroovyBugError("unexpected annotation type " + type.getName());
}
av.visitEnd();
}
private void visitAnnotationDefault(MethodNode node, MethodVisitor mv) {
if (!node.hasAnnotationDefault()) return;
Expression exp = ((ReturnStatement) node.getCode()).getExpression();
AnnotationVisitor av = mv.visitAnnotationDefault();
visitAnnotationDefaultExpression(av,node.getReturnType(),exp);
}
private static boolean isVargs(Parameter[] p) {
if (p.length==0) return false;
ClassNode clazz = p[p.length-1].getType();
return (clazz.isArray());
}
public void visitConstructor(ConstructorNode node) {
controller.setConstructorNode(node);
super.visitConstructor(node);
}
public void visitMethod(MethodNode node) {
controller.setMethodNode(node);
super.visitMethod(node);
}
public void visitField(FieldNode fieldNode) {
onLineNumber(fieldNode, "visitField: " + fieldNode.getName());
ClassNode t = fieldNode.getType();
String signature = BytecodeHelper.getGenericsBounds(t);
FieldVisitor fv = cv.visitField(
fieldNode.getModifiers(),
fieldNode.getName(),
BytecodeHelper.getTypeDescription(t),
signature,
null);
visitAnnotations(fieldNode, fv);
fv.visitEnd();
}
public void visitProperty(PropertyNode statement) {
// the verifier created the field and the setter/getter methods, so here is
// not really something to do
onLineNumber(statement, "visitProperty:" + statement.getField().getName());
controller.setMethodNode(null);
}
// GroovyCodeVisitor interface
//-------------------------------------------------------------------------
// Statements
//-------------------------------------------------------------------------
protected void visitStatement(Statement statement) {
throw new GroovyBugError("visitStatement should not be visited here.");
}
@Override
public void visitCatchStatement(CatchStatement statement) {
statement.getCode().visit(this);
}
public void visitBlockStatement(BlockStatement block) {
controller.getStatementWriter().writeBlockStatement(block);
}
public void visitForLoop(ForStatement loop) {
controller.getStatementWriter().writeForStatement(loop);
}
public void visitWhileLoop( WhileStatement loop) {
controller.getStatementWriter().writeWhileLoop(loop);
}
public void visitDoWhileLoop(DoWhileStatement loop) {
controller.getStatementWriter().writeDoWhileLoop(loop);
}
public void visitIfElse(IfStatement ifElse) {
controller.getStatementWriter().writeIfElse(ifElse);
}
public void visitAssertStatement(AssertStatement statement) {
controller.getStatementWriter().writeAssert(statement);
}
public void visitTryCatchFinally(TryCatchStatement statement) {
controller.getStatementWriter().writeTryCatchFinally(statement);
}
public void visitSwitch(SwitchStatement statement) {
controller.getStatementWriter().writeSwitch(statement);
}
public void visitCaseStatement(CaseStatement statement) {}
public void visitBreakStatement(BreakStatement statement) {
controller.getStatementWriter().writeBreak(statement);
}
public void visitContinueStatement(ContinueStatement statement) {
controller.getStatementWriter().writeContinue(statement);
}
public void visitSynchronizedStatement(SynchronizedStatement statement) {
controller.getStatementWriter().writeSynchronized(statement);
}
public void visitThrowStatement(ThrowStatement statement) {
controller.getStatementWriter().writeThrow(statement);
}
public void visitReturnStatement(ReturnStatement statement) {
controller.getStatementWriter().writeReturn(statement);
}
public void visitExpressionStatement(ExpressionStatement statement) {
controller.getStatementWriter().writeExpressionStatement(statement);
}
// Expressions
//-------------------------------------------------------------------------
public void visitTernaryExpression(TernaryExpression expression) {
onLineNumber(expression, "visitTernaryExpression");
MethodVisitor mv = controller.getMethodVisitor();
Expression boolPart = expression.getBooleanExpression();
Expression truePart = expression.getTrueExpression();
Expression falsePart = expression.getFalseExpression();
final OperandStack operandStack = controller.getOperandStack();
int numberOfOperandParts = 2;
if (expression instanceof ElvisOperatorExpression) {
truePart.visit(this);
operandStack.box();
int mark = operandStack.getStackLength();
operandStack.dup();
operandStack.castToBool(mark,true);
boolPart = BytecodeExpression.NOP;
truePart = BytecodeExpression.NOP;
final Expression oldFalse = falsePart;
falsePart = new BytecodeExpression() {
public void visit(MethodVisitor mv) {
operandStack.pop();
oldFalse.visit(AsmClassGenerator.this);
operandStack.box();
}
};
}
if (boolPart!=BytecodeExpression.NOP) {
boolPart.visit(this);
operandStack.doGroovyCast(ClassHelper.boolean_TYPE);
}
Label l0 = operandStack.jump(IFEQ);
controller.getCompileStack().pushBooleanExpression();
if (truePart!=BytecodeExpression.NOP) {
truePart.visit(this);
operandStack.box();
}
controller.getCompileStack().pop();
Label l1 = new Label();
mv.visitJumpInsn(GOTO, l1);
mv.visitLabel(l0);
controller.getCompileStack().pushBooleanExpression();
falsePart.visit(this);
operandStack.box();
controller.getCompileStack().pop();
mv.visitLabel(l1);
controller.getOperandStack().replace(ClassHelper.OBJECT_TYPE,numberOfOperandParts);
}
public void visitDeclarationExpression(DeclarationExpression expression) {
onLineNumber(expression, "visitDeclarationExpression: \"" + expression.getText() + "\"");
controller.getBinaryExpHelper().evaluateEqual(expression,true);
}
public void visitBinaryExpression(BinaryExpression expression) {
onLineNumber(expression, "visitBinaryExpression: \"" + expression.getOperation().getText() + "\" ");
controller.getBinaryExpHelper().eval(expression);
controller.getAssertionWriter().record(expression.getOperation());
}
public void visitPostfixExpression(PostfixExpression expression) {
controller.getBinaryExpHelper().evaluatePostfixMethod(expression);
controller.getAssertionWriter().record(expression);
}
public void throwException(String s) {
throw new RuntimeParserException(s, currentASTNode);
}
public void visitPrefixExpression(PrefixExpression expression) {
controller.getBinaryExpHelper().evaluatePrefixMethod(expression);
controller.getAssertionWriter().record(expression);
}
public void visitClosureExpression(ClosureExpression expression) {
controller.getClosureWriter().writeClosure(expression);
}
/**
* Loads either this object or if we're inside a closure then load the top level owner
*/
protected void loadThisOrOwner() {
if (isInnerClass()) {
visitFieldExpression(new FieldExpression(controller.getClassNode().getDeclaredField("owner")));
} else {
loadThis();
}
}
/**
* Generate byte code for constants
*
* @see <a href="http://java.sun.com/docs/books/vmspec/2nd-edition/html/ClassFile.doc.html#14152">Class field types</a>
*/
public void visitConstantExpression(ConstantExpression expression) {
final String constantName = expression.getConstantName();
if (controller.isStaticConstructor() || constantName == null) {
controller.getOperandStack().pushConstant(expression);
} else {
controller.getMethodVisitor().visitFieldInsn(GETSTATIC, controller.getInternalClassName(),constantName, BytecodeHelper.getTypeDescription(expression.getType()));
controller.getOperandStack().push(expression.getType());
}
}
public void visitSpreadExpression(SpreadExpression expression) {
throw new GroovyBugError("SpreadExpression should not be visited here");
}
public void visitSpreadMapExpression(SpreadMapExpression expression) {
Expression subExpression = expression.getExpression();
// to not record the underlying MapExpression twice,
// we disable the assertion tracker
// see http://jira.codehaus.org/browse/GROOVY-3421
controller.getAssertionWriter().disableTracker();
subExpression.visit(this);
controller.getOperandStack().box();
spreadMap.call(controller.getMethodVisitor());
controller.getAssertionWriter().reenableTracker();
controller.getOperandStack().replace(ClassHelper.OBJECT_TYPE);
}
public void visitMethodPointerExpression(MethodPointerExpression expression) {
Expression subExpression = expression.getExpression();
subExpression.visit(this);
controller.getOperandStack().box();
controller.getOperandStack().pushDynamicName(expression.getMethodName());
getMethodPointer.call(controller.getMethodVisitor());
controller.getOperandStack().replace(ClassHelper.CLOSURE_TYPE,2);
}
public void visitUnaryMinusExpression(UnaryMinusExpression expression) {
Expression subExpression = expression.getExpression();
subExpression.visit(this);
controller.getOperandStack().box();
unaryMinus.call(controller.getMethodVisitor());
controller.getOperandStack().replace(ClassHelper.OBJECT_TYPE);
controller.getAssertionWriter().record(expression);
}
public void visitUnaryPlusExpression(UnaryPlusExpression expression) {
Expression subExpression = expression.getExpression();
subExpression.visit(this);
controller.getOperandStack().box();
unaryPlus.call(controller.getMethodVisitor());
controller.getOperandStack().replace(ClassHelper.OBJECT_TYPE);
controller.getAssertionWriter().record(expression);
}
public void visitBitwiseNegationExpression(BitwiseNegationExpression expression) {
Expression subExpression = expression.getExpression();
subExpression.visit(this);
controller.getOperandStack().box();
bitwiseNegate.call(controller.getMethodVisitor());
controller.getAssertionWriter().record(expression);
}
public void visitCastExpression(CastExpression castExpression) {
ClassNode type = castExpression.getType();
castExpression.getExpression().visit(this);
if (castExpression.isCoerce()) {
controller.getOperandStack().doAsType(type);
} else {
controller.getOperandStack().doGroovyCast(type);
}
}
public void visitNotExpression(NotExpression expression) {
Expression subExpression = expression.getExpression();
int mark = controller.getOperandStack().getStackLength();
subExpression.visit(this);
controller.getOperandStack().castToBool(mark, true);
BytecodeHelper.negateBoolean(controller.getMethodVisitor());
controller.getAssertionWriter().record(expression);
}
/**
* return a primitive boolean value of the BooleanExpression.
*
* @param expression
*/
public void visitBooleanExpression(BooleanExpression expression) {
controller.getCompileStack().pushBooleanExpression();
int mark = controller.getOperandStack().getStackLength();
Expression inner = expression.getExpression();
inner.visit(this);
controller.getOperandStack().castToBool(mark, true);
controller.getCompileStack().pop();
}
public void visitMethodCallExpression(MethodCallExpression call) {
onLineNumber(call, "visitMethodCallExpression: \"" + call.getMethod() + "\":");
controller.getInvocationWriter().writeInvokeMethod(call);
controller.getAssertionWriter().record(call.getMethod());
}
protected boolean emptyArguments(Expression arguments) {
return argumentSize(arguments) == 0;
}
public static boolean containsSpreadExpression(Expression arguments) {
List args = null;
if (arguments instanceof TupleExpression) {
TupleExpression tupleExpression = (TupleExpression) arguments;
args = tupleExpression.getExpressions();
} else if (arguments instanceof ListExpression) {
ListExpression le = (ListExpression) arguments;
args = le.getExpressions();
} else {
return arguments instanceof SpreadExpression;
}
for (Iterator iter = args.iterator(); iter.hasNext();) {
if (iter.next() instanceof SpreadExpression) return true;
}
return false;
}
public static int argumentSize(Expression arguments) {
if (arguments instanceof TupleExpression) {
TupleExpression tupleExpression = (TupleExpression) arguments;
int size = tupleExpression.getExpressions().size();
return size;
}
return 1;
}
public void visitStaticMethodCallExpression(StaticMethodCallExpression call) {
onLineNumber(call, "visitStaticMethodCallExpression: \"" + call.getMethod() + "\":");
controller.getInvocationWriter().writeInvokeStaticMethod(call);
controller.getAssertionWriter().record(call);
}
private void visitSpecialConstructorCall(ConstructorCallExpression call) {
if (controller.getClosureWriter().addGeneratedClosureConstructorCall(call)) return;
MethodVisitor mv = controller.getMethodVisitor();
OperandStack operandStack = controller.getOperandStack();
ClassNode callNode = controller.getClassNode();
if (call.isSuperCall()) callNode = callNode.getSuperClass();
List constructors = sortConstructors(call, callNode);
call.getArguments().visit(this);
// keep Object[] on stack
mv.visitInsn(DUP);
// to select the constructor we need also the number of
// available constructors and the class we want to make
// the call on
BytecodeHelper.pushConstant(mv, constructors.size());
visitClassExpression(new ClassExpression(callNode));
operandStack.remove(1);
// removes one Object[] leaves the int containing the
// call flags and the constructor number
selectConstructorAndTransformArguments.call(mv);
// Object[],int -> int,Object[],int
// we need to examine the flags and maybe change the
// Object[] later, so this reordering will do the job
mv.visitInsn(DUP_X1);
// test if rewrap flag is set
mv.visitInsn(ICONST_1);
mv.visitInsn(IAND);
Label afterIf = new Label();
mv.visitJumpInsn(IFEQ, afterIf);
// true part, so rewrap using the first argument
mv.visitInsn(ICONST_0);
mv.visitInsn(AALOAD);
mv.visitTypeInsn(CHECKCAST, "[Ljava/lang/Object;");
mv.visitLabel(afterIf);
// here the stack is int,Object[], but we need the
// the int for our table, so swap it
mv.visitInsn(SWAP);
//load "this"
if (controller.isConstructor()) {
mv.visitVarInsn(ALOAD, 0);
} else {
mv.visitTypeInsn(NEW, BytecodeHelper.getClassInternalName(callNode));
}
mv.visitInsn(SWAP);
//prepare switch with >>8
mv.visitIntInsn(BIPUSH, 8);
mv.visitInsn(ISHR);
Label[] targets = new Label[constructors.size()];
int[] indices = new int[constructors.size()];
for (int i = 0; i < targets.length; i++) {
targets[i] = new Label();
indices[i] = i;
}
// create switch targets
Label defaultLabel = new Label();
Label afterSwitch = new Label();
mv.visitLookupSwitchInsn(defaultLabel, indices, targets);
for (int i = 0; i < targets.length; i++) {
mv.visitLabel(targets[i]);
// to keep the stack height, we need to leave
// one Object[] on the stack as last element. At the
// same time, we need the Object[] on top of the stack
// to extract the parameters.
if (controller.isConstructor()) {
// in this case we need one "this", so a SWAP will exchange
// "this" and Object[], a DUP_X1 will then copy the Object[]
/// to the last place in the stack:
// Object[],this -SWAP-> this,Object[]
// this,Object[] -DUP_X1-> Object[],this,Object[]
mv.visitInsn(SWAP);
mv.visitInsn(DUP_X1);
} else {
// in this case we need two "this" in between and the Object[]
// at the bottom of the stack as well as on top for our invokeSpecial
// So we do DUP_X1, DUP2_X1, POP
// Object[],this -DUP_X1-> this,Object[],this
// this,Object[],this -DUP2_X1-> Object[],this,this,Object[],this
// Object[],this,this,Object[],this -POP-> Object[],this,this,Object[]
mv.visitInsn(DUP_X1);
mv.visitInsn(DUP2_X1);
mv.visitInsn(POP);
}
ConstructorNode cn = (ConstructorNode) constructors.get(i);
String descriptor = BytecodeHelper.getMethodDescriptor(ClassHelper.VOID_TYPE, cn.getParameters());
// unwrap the Object[] and make transformations if needed
// that means, to duplicate the Object[], make a cast with possible
// unboxing and then swap it with the Object[] for each parameter
Parameter[] parameters = cn.getParameters();
for (int p = 0; p < parameters.length; p++) {
operandStack.push(ClassHelper.OBJECT_TYPE);
mv.visitInsn(DUP);
BytecodeHelper.pushConstant(mv, p);
mv.visitInsn(AALOAD);
operandStack.push(ClassHelper.OBJECT_TYPE);
ClassNode type = parameters[p].getType();
operandStack.doGroovyCast(type);
operandStack.swap();
operandStack.remove(2);
}
// at the end we remove the Object[]
mv.visitInsn(POP);
// make the constructor call
mv.visitMethodInsn(INVOKESPECIAL, BytecodeHelper.getClassInternalName(callNode), "<init>", descriptor);
mv.visitJumpInsn(GOTO, afterSwitch);
}
mv.visitLabel(defaultLabel);
// this part should never be reached!
mv.visitTypeInsn(NEW, "java/lang/IllegalArgumentException");
mv.visitInsn(DUP);
mv.visitLdcInsn("illegal constructor number");
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/IllegalArgumentException", "<init>", "(Ljava/lang/String;)V");
mv.visitInsn(ATHROW);
mv.visitLabel(afterSwitch);
// For a special constructor call inside a constructor we don't need
// any result object on the stack, for outside the constructor we do.
// to keep the stack height for the able we kept one object as dummy
// result on the stack, which we can remove now if inside a constructor.
if (!controller.isConstructor()) {
// in case we are not in a constructor we have an additional
// object on the stack, the result of our constructor call
// which we want to keep, so we swap with the dummy object and
// do normal removal of it. In the end, the call result will be
// on the stack then
mv.visitInsn(SWAP);
operandStack.push(callNode); // for call result
}
mv.visitInsn(POP);
}
private List sortConstructors(ConstructorCallExpression call, ClassNode callNode) {
// sort in a new list to prevent side effects
List constructors = new ArrayList(callNode.getDeclaredConstructors());
Comparator comp = new Comparator() {
public int compare(Object arg0, Object arg1) {
ConstructorNode c0 = (ConstructorNode) arg0;
ConstructorNode c1 = (ConstructorNode) arg1;
String descriptor0 = BytecodeHelper.getMethodDescriptor(ClassHelper.VOID_TYPE, c0.getParameters());
String descriptor1 = BytecodeHelper.getMethodDescriptor(ClassHelper.VOID_TYPE, c1.getParameters());
return descriptor0.compareTo(descriptor1);
}
};
Collections.sort(constructors, comp);
return constructors;
}
public void visitConstructorCallExpression(ConstructorCallExpression call) {
onLineNumber(call, "visitConstructorCallExpression: \"" + call.getType().getName() + "\":");
if (call.isSpecialCall()) {
controller.getCompileStack().pushInSpecialConstructorCall();
visitSpecialConstructorCall(call);
controller.getCompileStack().pop();
return;
}
Expression arguments = call.getArguments();
if (arguments instanceof TupleExpression) {
TupleExpression tupleExpression = (TupleExpression) arguments;
int size = tupleExpression.getExpressions().size();
if (size == 0) {
arguments = MethodCallExpression.NO_ARGUMENTS;
}
}
Expression receiverClass = new ClassExpression(call.getType());
controller.getCallSiteWriter().makeCallSite(
receiverClass, CallSiteWriter.CONSTRUCTOR,
arguments, false, false, false,
false);
controller.getAssertionWriter().record(call);
}
private static String makeFieldClassName(ClassNode type) {
String internalName = BytecodeHelper.getClassInternalName(type);
StringBuffer ret = new StringBuffer(internalName.length());
for (int i = 0; i < internalName.length(); i++) {
char c = internalName.charAt(i);
if (c == '/') {
ret.append('$');
} else if (c == ';') {
//append nothing -> delete ';'
} else {
ret.append(c);
}
}
return ret.toString();
}
private static String getStaticFieldName(ClassNode type) {
ClassNode componentType = type;
String prefix = "";
for (; componentType.isArray(); componentType = componentType.getComponentType()) {
prefix += "$";
}
if (prefix.length() != 0) prefix = "array" + prefix;
String name = prefix + "$class$" + makeFieldClassName(componentType);
return name;
}
private void visitAttributeOrProperty(PropertyExpression expression, MethodCallerMultiAdapter adapter) {
MethodVisitor mv = controller.getMethodVisitor();
Expression objectExpression = expression.getObjectExpression();
if (isThisOrSuper(objectExpression)) {
// let's use the field expression if it's available
String name = expression.getPropertyAsString();
if (name != null) {
FieldNode field = null;
boolean privateSuperField = false;
if (isSuperExpression(objectExpression)) {
field = controller.getClassNode().getSuperClass().getDeclaredField(name);
if (field != null && ((field.getModifiers() & ACC_PRIVATE) != 0)) {
privateSuperField = true;
}
} else {
if (controller.isNotExplicitThisInClosure(expression.isImplicitThis())) {
field = controller.getClassNode().getDeclaredField(name);
}
}
if (field != null && !privateSuperField) {//GROOVY-4497: don't visit super field if it is private
visitFieldExpression(new FieldExpression(field));
return;
}
}
if (isSuperExpression(objectExpression)) {
String prefix;
if (controller.getCompileStack().isLHS()) {
prefix = "set";
} else {
prefix = "get";
}
String propName = prefix + MetaClassHelper.capitalize(name);
visitMethodCallExpression(new MethodCallExpression(objectExpression, propName, MethodCallExpression.NO_ARGUMENTS));
return;
}
}
final String propName = expression.getPropertyAsString();
//TODO: add support for super here too
if (expression.getObjectExpression() instanceof ClassExpression &&
propName!=null && propName.equals("this"))
{
// we have something like A.B.this, and need to make it
// into this.this$0.this$0, where this.this$0 returns
// A.B and this.this$0.this$0 return A.
ClassNode type = objectExpression.getType();
ClassNode iterType = controller.getClassNode();
mv.visitVarInsn(ALOAD, 0);
while (!iterType.equals(type)) {
String ownerName = BytecodeHelper.getClassInternalName(iterType);
iterType = iterType.getOuterClass();
String typeName = BytecodeHelper.getTypeDescription(iterType);
mv.visitFieldInsn(GETFIELD, ownerName, "this$0", typeName);
}
controller.getOperandStack().push(type);
return;
}
if (adapter == getProperty && !expression.isSpreadSafe() && propName != null) {
controller.getCallSiteWriter().makeGetPropertySite(objectExpression, propName, expression.isSafe(), expression.isImplicitThis());
} else if (adapter == getGroovyObjectProperty && !expression.isSpreadSafe() && propName != null) {
controller.getCallSiteWriter().makeGroovyObjectGetPropertySite(objectExpression, propName, expression.isSafe(), expression.isImplicitThis());
} else {
if (controller.getCompileStack().isLHS()) controller.getOperandStack().box();
controller.getInvocationWriter().makeCall(
expression,
objectExpression, // receiver
new CastExpression(ClassHelper.STRING_TYPE, expression.getProperty()), // messageName
MethodCallExpression.NO_ARGUMENTS, adapter,
expression.isSafe(), expression.isSpreadSafe(), expression.isImplicitThis()
);
}
}
public void visitPropertyExpression(PropertyExpression expression) {
Expression objectExpression = expression.getObjectExpression();
OperandStack operandStack = controller.getOperandStack();
int mark = operandStack.getStackLength()-1;
MethodCallerMultiAdapter adapter;
if (controller.getCompileStack().isLHS()) {
operandStack.box();
adapter = setProperty;
if (isGroovyObject(objectExpression)) adapter = setGroovyObjectProperty;
if (controller.isStaticContext() && isThisOrSuper(objectExpression)) adapter = setProperty;
} else {
adapter = getProperty;
if (isGroovyObject(objectExpression)) adapter = getGroovyObjectProperty;
if (controller.isStaticContext() && isThisOrSuper(objectExpression)) adapter = getProperty;
}
visitAttributeOrProperty(expression, adapter);
if (controller.getCompileStack().isLHS()) {
// remove surplus values
operandStack.remove(operandStack.getStackLength()-mark);
} else {
controller.getAssertionWriter().record(expression.getProperty());
}
}
public void visitAttributeExpression(AttributeExpression expression) {
Expression objectExpression = expression.getObjectExpression();
MethodCallerMultiAdapter adapter;
if (controller.getCompileStack().isLHS()) {
adapter = setField;
if (isGroovyObject(objectExpression)) adapter = setGroovyObjectField;
if (usesSuper(expression)) adapter = setFieldOnSuper;
} else {
adapter = getField;
if (isGroovyObject(objectExpression)) adapter = getGroovyObjectField;
if (usesSuper(expression)) adapter = getFieldOnSuper;
}
visitAttributeOrProperty(expression, adapter);
if (!controller.getCompileStack().isLHS()) {
controller.getAssertionWriter().record(expression.getProperty());
} else {
controller.getOperandStack().remove(2);
}
}
private static boolean usesSuper(PropertyExpression pe) {
Expression expression = pe.getObjectExpression();
if (expression instanceof VariableExpression) {
VariableExpression varExp = (VariableExpression) expression;
String variable = varExp.getName();
return variable.equals("super");
}
return false;
}
private static boolean isGroovyObject(Expression objectExpression) {
return isThisExpression(objectExpression) || objectExpression.getType().isDerivedFromGroovyObject() && !(objectExpression instanceof ClassExpression);
}
public void visitFieldExpression(FieldExpression expression) {
FieldNode field = expression.getField();
if (field.isStatic()) {
if (controller.getCompileStack().isLHS()) {
storeStaticField(expression);
} else {
loadStaticField(expression);
}
} else {
if (controller.getCompileStack().isLHS()) {
storeThisInstanceField(expression);
} else {
loadInstanceField(expression);
}
}
if (controller.getCompileStack().isLHS()) controller.getAssertionWriter().record(expression);
}
/**
* @param fldExp
*/
public void loadStaticField(FieldExpression fldExp) {
MethodVisitor mv = controller.getMethodVisitor();
FieldNode field = fldExp.getField();
boolean holder = field.isHolder() && !controller.isInClosureConstructor();
ClassNode type = field.getType();
String ownerName = (field.getOwner().equals(controller.getClassNode()))
? controller.getInternalClassName()
: BytecodeHelper.getClassInternalName(field.getOwner());
if (holder) {
mv.visitFieldInsn(GETSTATIC, ownerName, fldExp.getFieldName(), BytecodeHelper.getTypeDescription(type));
mv.visitMethodInsn(INVOKEVIRTUAL, "groovy/lang/Reference", "get", "()Ljava/lang/Object;");
controller.getOperandStack().push(ClassHelper.OBJECT_TYPE);
} else {
mv.visitFieldInsn(GETSTATIC, ownerName, fldExp.getFieldName(), BytecodeHelper.getTypeDescription(type));
controller.getOperandStack().push(field.getType());
}
}
/**
* RHS instance field. should move most of the code in the BytecodeHelper
*
* @param fldExp
*/
public void loadInstanceField(FieldExpression fldExp) {
MethodVisitor mv = controller.getMethodVisitor();
FieldNode field = fldExp.getField();
boolean holder = field.isHolder() && !controller.isInClosureConstructor();
ClassNode type = field.getType();
String ownerName = (field.getOwner().equals(controller.getClassNode()))
? controller.getInternalClassName()
: BytecodeHelper.getClassInternalName(field.getOwner());
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, ownerName, fldExp.getFieldName(), BytecodeHelper.getTypeDescription(type));
if (holder) {
mv.visitMethodInsn(INVOKEVIRTUAL, "groovy/lang/Reference", "get", "()Ljava/lang/Object;");
controller.getOperandStack().push(ClassHelper.OBJECT_TYPE);
} else {
controller.getOperandStack().push(field.getType());
}
}
private void storeThisInstanceField(FieldExpression expression) {
MethodVisitor mv = controller.getMethodVisitor();
FieldNode field = expression.getField();
boolean setReferenceFromReference = field.isHolder() && expression.isUseReferenceDirectly();
String ownerName = (field.getOwner().equals(controller.getClassNode())) ?
controller.getInternalClassName() : BytecodeHelper.getClassInternalName(field.getOwner());
OperandStack operandStack = controller.getOperandStack();
if (setReferenceFromReference) {
// rhs is ready to use reference, just put it in the field
mv.visitVarInsn(ALOAD, 0);
operandStack.push(controller.getClassNode());
operandStack.swap();
mv.visitFieldInsn(PUTFIELD, ownerName, field.getName(), BytecodeHelper.getTypeDescription(field.getType()));
} else if (field.isHolder()){
// rhs is normal value, set the value in the Reference
operandStack.doGroovyCast(field.getOriginType());
operandStack.box();
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, ownerName, expression.getFieldName(), BytecodeHelper.getTypeDescription(field.getType()));
mv.visitInsn(SWAP);
mv.visitMethodInsn(INVOKEVIRTUAL, "groovy/lang/Reference", "set", "(Ljava/lang/Object;)V");
} else {
// rhs is normal value, set normal value
operandStack.doGroovyCast(field.getOriginType());
mv.visitVarInsn(ALOAD, 0);
operandStack.push(controller.getClassNode());
operandStack.swap();
mv.visitFieldInsn(PUTFIELD, ownerName, field.getName(), BytecodeHelper.getTypeDescription(field.getType()));
}
}
private void storeStaticField(FieldExpression expression) {
MethodVisitor mv = controller.getMethodVisitor();
FieldNode field = expression.getField();
boolean holder = field.isHolder() && !controller.isInClosureConstructor();
controller.getOperandStack().doGroovyCast(field);
String ownerName = (field.getOwner().equals(controller.getClassNode())) ?
controller.getInternalClassName() : BytecodeHelper.getClassInternalName(field.getOwner());
if (holder) {
controller.getOperandStack().box();
mv.visitFieldInsn(GETSTATIC, ownerName, expression.getFieldName(), BytecodeHelper.getTypeDescription(field.getType()));
mv.visitInsn(SWAP);
mv.visitMethodInsn(INVOKEVIRTUAL, "groovy/lang/Reference", "set", "(Ljava/lang/Object;)V");
} else {
mv.visitFieldInsn(PUTSTATIC, ownerName, expression.getFieldName(), BytecodeHelper.getTypeDescription(field.getType()));
}
controller.getOperandStack().remove(1);
}
/**
* Visits a bare (unqualified) variable expression.
*/
public void visitVariableExpression(VariableExpression expression) {
String variableName = expression.getName();
//-----------------------------------------------------------------------
// SPECIAL CASES
// "this" for static methods is the Class instance
ClassNode classNode = controller.getClassNode();
//if (controller.isInClosure()) classNode = controller.getOutermostClass();
if (variableName.equals("this")) {
if (controller.isStaticMethod() || (!controller.getCompileStack().isImplicitThis() && controller.isStaticContext())) {
if (controller.isInClosure()) classNode = controller.getOutermostClass();
visitClassExpression(new ClassExpression(classNode));
} else {
loadThis();
}
return;
}
// "super" also requires special handling
if (variableName.equals("super")) {
if (controller.isStaticMethod()) {
visitClassExpression(new ClassExpression(classNode.getSuperClass()));
} else {
loadThis();
}
return;
}
BytecodeVariable variable = controller.getCompileStack().getVariable(variableName, false);
if (variable == null) {
processClassVariable(variableName);
} else {
controller.getOperandStack().loadOrStoreVariable(variable, expression.isUseReferenceDirectly());
}
if (!controller.getCompileStack().isLHS()) controller.getAssertionWriter().record(expression);
}
private void loadThis() {
MethodVisitor mv = controller.getMethodVisitor();
mv.visitVarInsn(ALOAD, 0);
if (controller.isInClosure() && !controller.getCompileStack().isImplicitThis()) {
mv.visitMethodInsn(
INVOKEVIRTUAL,
"groovy/lang/Closure",
"getThisObject",
"()Ljava/lang/Object;"
);
controller.getOperandStack().push(controller.getClassNode().getOuterClass());
} else {
controller.getOperandStack().push(controller.getClassNode());
}
}
private void processClassVariable(String name) {
if (passingParams && controller.isInScriptBody()) {
//TODO: check if this part is actually used
MethodVisitor mv = controller.getMethodVisitor();
// let's create a ScriptReference to pass into the closure
mv.visitTypeInsn(NEW, "org/codehaus/groovy/runtime/ScriptReference");
mv.visitInsn(DUP);
loadThisOrOwner();
mv.visitLdcInsn(name);
mv.visitMethodInsn(
INVOKESPECIAL,
"org/codehaus/groovy/runtime/ScriptReference",
"<init>",
"(Lgroovy/lang/Script;Ljava/lang/String;)V");
} else {
PropertyExpression pexp = new PropertyExpression(VariableExpression.THIS_EXPRESSION, name);
pexp.setImplicitThis(true);
visitPropertyExpression(pexp);
}
}
protected void createInterfaceSyntheticStaticFields() {
if (referencedClasses.isEmpty()) return;
ClassNode icl = controller.getInterfaceClassLoadingClass();
addInnerClass(icl);
for (String staticFieldName : referencedClasses.keySet()) { // generate a field node
icl.addField(staticFieldName, ACC_STATIC + ACC_SYNTHETIC, ClassHelper.CLASS_Type, new ClassExpression(referencedClasses.get(staticFieldName)));
}
}
protected void createSyntheticStaticFields() {
MethodVisitor mv = controller.getMethodVisitor();
for (String staticFieldName : referencedClasses.keySet()) {
// generate a field node
FieldNode fn = controller.getClassNode().getDeclaredField(staticFieldName);
if (fn != null) {
boolean type = fn.getType() == ClassHelper.CLASS_Type;
boolean modifiers = fn.getModifiers() == ACC_STATIC + ACC_SYNTHETIC;
if (!type || !modifiers) {
String text = "";
if (!type) text = " with wrong type: " + fn.getType() + " (java.lang.Class needed)";
if (!modifiers)
text = " with wrong modifiers: " + fn.getModifiers() + " (" + (ACC_STATIC + ACC_SYNTHETIC) + " needed)";
throwException(
"tried to set a static synthetic field " + staticFieldName + " in " + controller.getClassNode().getName() +
" for class resolving, but found already a node of that" +
" name " + text);
}
} else {
cv.visitField(ACC_PRIVATE + ACC_STATIC + ACC_SYNTHETIC, staticFieldName, "Ljava/lang/Class;", null, null);
}
mv = cv.visitMethod(ACC_PRIVATE + ACC_STATIC + ACC_SYNTHETIC, "$get$" + staticFieldName,"()Ljava/lang/Class;",null, null);
mv.visitCode();
mv.visitFieldInsn(GETSTATIC,controller.getInternalClassName(),staticFieldName,"Ljava/lang/Class;");
mv.visitInsn(DUP);
Label l0 = new Label();
mv.visitJumpInsn(IFNONNULL,l0);
mv.visitInsn(POP);
mv.visitLdcInsn(BytecodeHelper.getClassLoadingTypeDescription(referencedClasses.get(staticFieldName)));
mv.visitMethodInsn(INVOKESTATIC,controller.getInternalClassName(),"class$","(Ljava/lang/String;)Ljava/lang/Class;");
mv.visitInsn(DUP);
mv.visitFieldInsn(PUTSTATIC,controller.getInternalClassName(),staticFieldName,"Ljava/lang/Class;");
mv.visitLabel(l0);
mv.visitInsn(ARETURN);
mv.visitMaxs(0,0);
mv.visitEnd();
}
mv = cv.visitMethod(
ACC_STATIC + ACC_SYNTHETIC,
"class$",
"(Ljava/lang/String;)Ljava/lang/Class;",
null,
null);
Label l0 = new Label();
mv.visitLabel(l0);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Class", "forName", "(Ljava/lang/String;)Ljava/lang/Class;");
Label l1 = new Label();
mv.visitLabel(l1);
mv.visitInsn(ARETURN);
Label l2 = new Label();
mv.visitLabel(l2);
mv.visitVarInsn(ASTORE, 1);
mv.visitTypeInsn(NEW, "java/lang/NoClassDefFoundError");
mv.visitInsn(DUP);
mv.visitVarInsn(ALOAD, 1);
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/ClassNotFoundException", "getMessage", "()Ljava/lang/String;");
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/NoClassDefFoundError", "<init>", "(Ljava/lang/String;)V");
mv.visitInsn(ATHROW);
mv.visitTryCatchBlock(l0, l2, l2, "java/lang/ClassNotFoundException"); // br using l2 as the 2nd param seems create the right table entry
mv.visitMaxs(3, 2);
}
/**
* load class object on stack
*/
public void visitClassExpression(ClassExpression expression) {
ClassNode type = expression.getType();
MethodVisitor mv = controller.getMethodVisitor();
if (ClassHelper.isPrimitiveType(type)) {
ClassNode objectType = ClassHelper.getWrapper(type);
mv.visitFieldInsn(GETSTATIC, BytecodeHelper.getClassInternalName(objectType), "TYPE", "Ljava/lang/Class;");
} else {
String staticFieldName = getStaticFieldName(type);
referencedClasses.put(staticFieldName,type);
String internalClassName = controller.getInternalClassName();
if (controller.getClassNode().isInterface()) {
internalClassName = BytecodeHelper.getClassInternalName(controller.getInterfaceClassLoadingClass());
mv.visitFieldInsn(GETSTATIC, internalClassName, staticFieldName, "Ljava/lang/Class;");
} else {
mv.visitMethodInsn(INVOKESTATIC, internalClassName, "$get$" + staticFieldName, "()Ljava/lang/Class;");
}
}
controller.getOperandStack().push(ClassHelper.CLASS_Type);
}
public void visitRangeExpression(RangeExpression expression) {
OperandStack operandStack = controller.getOperandStack();
expression.getFrom().visit(this);
operandStack.box();
expression.getTo().visit(this);
operandStack.box();
operandStack.pushBool(expression.isInclusive());
createRangeMethod.call(controller.getMethodVisitor());
operandStack.replace(ClassHelper.RANGE_TYPE, 3);
}
public void visitMapEntryExpression(MapEntryExpression expression) {
throw new GroovyBugError("MapEntryExpression should not be visited here");
}
public void visitMapExpression(MapExpression expression) {
MethodVisitor mv = controller.getMethodVisitor();
List entries = expression.getMapEntryExpressions();
int size = entries.size();
BytecodeHelper.pushConstant(mv, size * 2);
mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
int i = 0;
for (Iterator iter = entries.iterator(); iter.hasNext();) {
Object object = iter.next();
MapEntryExpression entry = (MapEntryExpression) object;
mv.visitInsn(DUP);
BytecodeHelper.pushConstant(mv, i++);
entry.getKeyExpression().visit(this);
controller.getOperandStack().box();
mv.visitInsn(AASTORE);
mv.visitInsn(DUP);
BytecodeHelper.pushConstant(mv, i++);
entry.getValueExpression().visit(this);
controller.getOperandStack().box();
mv.visitInsn(AASTORE);
controller.getOperandStack().remove(2);
}
createMapMethod.call(mv);
controller.getOperandStack().push(ClassHelper.MAP_TYPE);
}
public void visitArgumentlistExpression(ArgumentListExpression ale) {
if (containsSpreadExpression(ale)) {
despreadList(ale.getExpressions(), true);
} else {
visitTupleExpression(ale, true);
}
}
public void despreadList(List expressions, boolean wrap) {
ArrayList spreadIndexes = new ArrayList();
ArrayList spreadExpressions = new ArrayList();
ArrayList normalArguments = new ArrayList();
for (int i = 0; i < expressions.size(); i++) {
Object expr = expressions.get(i);
if (!(expr instanceof SpreadExpression)) {
normalArguments.add(expr);
} else {
spreadIndexes.add(new ConstantExpression(Integer.valueOf(i - spreadExpressions.size()),true));
spreadExpressions.add(((SpreadExpression) expr).getExpression());
}
}
//load normal arguments as array
visitTupleExpression(new ArgumentListExpression(normalArguments), wrap);
//load spread expressions as array
(new TupleExpression(spreadExpressions)).visit(this);
//load insertion index
(new ArrayExpression(ClassHelper.int_TYPE, spreadIndexes, null)).visit(this);
controller.getOperandStack().remove(1);
despreadList.call(controller.getMethodVisitor());
}
public void visitTupleExpression(TupleExpression expression) {
visitTupleExpression(expression, false);
}
void visitTupleExpression(TupleExpression expression, boolean useWrapper) {
MethodVisitor mv = controller.getMethodVisitor();
int size = expression.getExpressions().size();
BytecodeHelper.pushConstant(mv, size);
mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
for (int i = 0; i < size; i++) {
mv.visitInsn(DUP);
BytecodeHelper.pushConstant(mv, i);
Expression argument = expression.getExpression(i);
argument.visit(this);
controller.getOperandStack().box();
if (useWrapper && argument instanceof CastExpression) loadWrapper(argument);
mv.visitInsn(AASTORE);
controller.getOperandStack().remove(1);
}
}
public void loadWrapper(Expression argument) {
MethodVisitor mv = controller.getMethodVisitor();
ClassNode goalClass = argument.getType();
visitClassExpression(new ClassExpression(goalClass));
if (goalClass.isDerivedFromGroovyObject()) {
createGroovyObjectWrapperMethod.call(mv);
} else {
createPojoWrapperMethod.call(mv);
}
controller.getOperandStack().remove(1);
}
public void visitArrayExpression(ArrayExpression expression) {
MethodVisitor mv = controller.getMethodVisitor();
ClassNode elementType = expression.getElementType();
String arrayTypeName = BytecodeHelper.getClassInternalName(elementType);
List sizeExpression = expression.getSizeExpression();
int size = 0;
int dimensions = 0;
if (sizeExpression != null) {
for (Iterator iter = sizeExpression.iterator(); iter.hasNext();) {
Expression element = (Expression) iter.next();
if (element == ConstantExpression.EMPTY_EXPRESSION) break;
dimensions++;
// let's convert to an int
element.visit(this);
controller.getOperandStack().doGroovyCast(ClassHelper.int_TYPE);
}
controller.getOperandStack().remove(dimensions);
} else {
size = expression.getExpressions().size();
BytecodeHelper.pushConstant(mv, size);
}
int storeIns = AASTORE;
if (sizeExpression != null) {
arrayTypeName = BytecodeHelper.getTypeDescription(expression.getType());
mv.visitMultiANewArrayInsn(arrayTypeName, dimensions);
} else if (ClassHelper.isPrimitiveType(elementType)) {
int primType = 0;
if (elementType == ClassHelper.boolean_TYPE) {
primType = T_BOOLEAN;
storeIns = BASTORE;
} else if (elementType == ClassHelper.char_TYPE) {
primType = T_CHAR;
storeIns = CASTORE;
} else if (elementType == ClassHelper.float_TYPE) {
primType = T_FLOAT;
storeIns = FASTORE;
} else if (elementType == ClassHelper.double_TYPE) {
primType = T_DOUBLE;
storeIns = DASTORE;
} else if (elementType == ClassHelper.byte_TYPE) {
primType = T_BYTE;
storeIns = BASTORE;
} else if (elementType == ClassHelper.short_TYPE) {
primType = T_SHORT;
storeIns = SASTORE;
} else if (elementType == ClassHelper.int_TYPE) {
primType = T_INT;
storeIns = IASTORE;
} else if (elementType == ClassHelper.long_TYPE) {
primType = T_LONG;
storeIns = LASTORE;
}
mv.visitIntInsn(NEWARRAY, primType);
} else {
mv.visitTypeInsn(ANEWARRAY, arrayTypeName);
}
for (int i = 0; i < size; i++) {
mv.visitInsn(DUP);
BytecodeHelper.pushConstant(mv, i);
Expression elementExpression = expression.getExpression(i);
if (elementExpression == null) {
ConstantExpression.NULL.visit(this);
} else {
if (!elementType.equals(elementExpression.getType())) {
visitCastExpression(new CastExpression(elementType, elementExpression, true));
} else {
elementExpression.visit(this);
}
}
mv.visitInsn(storeIns);
controller.getOperandStack().remove(1);
}
controller.getOperandStack().push(expression.getType());
}
public void visitClosureListExpression(ClosureListExpression expression) {
MethodVisitor mv = controller.getMethodVisitor();
controller.getCompileStack().pushVariableScope(expression.getVariableScope());
List<Expression> expressions = expression.getExpressions();
final int size = expressions.size();
// init declarations
LinkedList<DeclarationExpression> declarations = new LinkedList<DeclarationExpression>();
for (int i = 0; i < size; i++) {
Expression expr = expressions.get(i);
if (expr instanceof DeclarationExpression) {
declarations.add((DeclarationExpression) expr);
DeclarationExpression de = (DeclarationExpression) expr;
BinaryExpression be = new BinaryExpression(
de.getLeftExpression(),
de.getOperation(),
de.getRightExpression());
expressions.set(i, be);
de.setRightExpression(ConstantExpression.NULL);
visitDeclarationExpression(de);
}
}
LinkedList instructions = new LinkedList();
BytecodeSequence seq = new BytecodeSequence(instructions);
BlockStatement bs = new BlockStatement();
bs.addStatement(seq);
Parameter closureIndex = new Parameter(ClassHelper.int_TYPE, "__closureIndex");
ClosureExpression ce = new ClosureExpression(new Parameter[]{closureIndex}, bs);
ce.setVariableScope(expression.getVariableScope());
// to keep stack height put a null on stack
instructions.add(ConstantExpression.NULL);
// init table
final Label dflt = new Label();
final Label tableEnd = new Label();
final Label[] labels = new Label[size];
instructions.add(new BytecodeInstruction() {
public void visit(MethodVisitor mv) {
mv.visitVarInsn(ILOAD, 1);
mv.visitTableSwitchInsn(0, size - 1, dflt, labels);
}
});
// visit cases
for (int i = 0; i < size; i++) {
final Label label = new Label();
Object expr = expressions.get(i);
final boolean isStatement = expr instanceof Statement;
labels[i] = label;
instructions.add(new BytecodeInstruction() {
public void visit(MethodVisitor mv) {
mv.visitLabel(label);
// expressions will leave a value on stack, statements not
// so expressions need to pop the alibi null
if (!isStatement) mv.visitInsn(POP);
}
});
instructions.add(expr);
instructions.add(new BytecodeInstruction() {
public void visit(MethodVisitor mv) {
mv.visitJumpInsn(GOTO, tableEnd);
}
});
}
// default case
{
instructions.add(new BytecodeInstruction() {
public void visit(MethodVisitor mv) {
mv.visitLabel(dflt);
}
});
ConstantExpression text = new ConstantExpression("invalid index for closure");
ConstructorCallExpression cce = new ConstructorCallExpression(ClassHelper.make(IllegalArgumentException.class), text);
ThrowStatement ts = new ThrowStatement(cce);
instructions.add(ts);
}
// return
instructions.add(new BytecodeInstruction() {
public void visit(MethodVisitor mv) {
mv.visitLabel(tableEnd);
mv.visitInsn(ARETURN);
}
});
// load main Closure
visitClosureExpression(ce);
// we need later an array to store the curried
// closures, so we create it here and ave it
// in a temporary variable
BytecodeHelper.pushConstant(mv, size);
mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
int listArrayVar = controller.getCompileStack().defineTemporaryVariable("_listOfClosures", true);
// add curried versions
for (int i = 0; i < size; i++) {
// stack: closure
// we need to create a curried closure version
// so we store the type on stack
mv.visitTypeInsn(NEW, "org/codehaus/groovy/runtime/CurriedClosure");
// stack: closure, type
// for a constructor call we need the type two times
// and the closure after them
mv.visitInsn(DUP2);
mv.visitInsn(SWAP);
// stack: closure,type,type,closure
// so we can create the curried closure
mv.visitInsn(ICONST_1);
mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
mv.visitInsn(DUP);
mv.visitInsn(ICONST_0);
mv.visitLdcInsn(i);
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;");
mv.visitInsn(AASTORE);
mv.visitMethodInsn(INVOKESPECIAL, "org/codehaus/groovy/runtime/CurriedClosure", "<init>", "(Lgroovy/lang/Closure;[Ljava/lang/Object;)V");
// stack: closure,curriedClosure
// we need to save the result
mv.visitVarInsn(ALOAD, listArrayVar);
mv.visitInsn(SWAP);
BytecodeHelper.pushConstant(mv, i);
mv.visitInsn(SWAP);
mv.visitInsn(AASTORE);
// stack: closure
}
// we don't need the closure any longer, so remove it
mv.visitInsn(POP);
// we load the array and create a list from it
mv.visitVarInsn(ALOAD, listArrayVar);
createListMethod.call(mv);
// remove the temporary variable to keep the
// stack clean
controller.getCompileStack().removeVar(listArrayVar);
controller.getOperandStack().pop();
}
public void visitBytecodeSequence(BytecodeSequence bytecodeSequence) {
MethodVisitor mv = controller.getMethodVisitor();
List instructions = bytecodeSequence.getInstructions();
int mark = controller.getOperandStack().getStackLength();
for (Iterator iterator = instructions.iterator(); iterator.hasNext();) {
Object part = iterator.next();
if (part == EmptyExpression.INSTANCE) {
mv.visitInsn(ACONST_NULL);
} else if (part instanceof Expression) {
((Expression) part).visit(this);
} else if (part instanceof Statement) {
Statement stm = (Statement) part;
stm.visit(this);
mv.visitInsn(ACONST_NULL);
} else {
BytecodeInstruction runner = (BytecodeInstruction) part;
runner.visit(mv);
}
}
controller.getOperandStack().remove(mark-controller.getOperandStack().getStackLength());
}
public void visitListExpression(ListExpression expression) {
onLineNumber(expression,"ListExpression" );
int size = expression.getExpressions().size();
boolean containsSpreadExpression = containsSpreadExpression(expression);
boolean containsOnlyConstants = !containsSpreadExpression && containsOnlyConstants(expression);
OperandStack operandStack = controller.getOperandStack();
if (!containsSpreadExpression) {
MethodVisitor mv = controller.getMethodVisitor();
BytecodeHelper.pushConstant(mv, size);
mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
int maxInit = 1000;
if (size<maxInit || !containsOnlyConstants) {
for (int i = 0; i < size; i++) {
mv.visitInsn(DUP);
BytecodeHelper.pushConstant(mv, i);
expression.getExpression(i).visit(this);
operandStack.box();
mv.visitInsn(AASTORE);
}
controller.getOperandStack().remove(size);
} else {
List<Expression> expressions = expression.getExpressions();
List<String> methods = new ArrayList();
MethodVisitor oldMv = mv;
int index = 0;
int methodIndex = 0;
while (index<size) {
methodIndex++;
String methodName = "$createListEntry_" + methodIndex;
methods.add(methodName);
mv = controller.getClassVisitor().visitMethod(
ACC_PRIVATE+ACC_STATIC+ACC_SYNTHETIC,
methodName,
"([Ljava/lang/Object;)V",
null, null);
controller.setMethodVisitor(mv);
mv.visitCode();
int methodBlockSize = Math.min(size-index, maxInit);
int methodBlockEnd = index + methodBlockSize;
for (; index < methodBlockEnd; index++) {
mv.visitVarInsn(ALOAD, 0);
mv.visitLdcInsn(index);
expressions.get(index).visit(this);
operandStack.box();
mv.visitInsn(AASTORE);
}
operandStack.remove(methodBlockSize);
mv.visitInsn(RETURN);
mv.visitMaxs(0,0);
mv.visitEnd();
}
mv = oldMv;
controller.setMethodVisitor(mv);
for (String methodName : methods) {
mv.visitInsn(DUP);
mv.visitMethodInsn(INVOKESTATIC,controller.getInternalClassName(),methodName,"([Ljava/lang/Object;)V");
}
}
} else {
despreadList(expression.getExpressions(), false);
}
createListMethod.call(controller.getMethodVisitor());
operandStack.push(ClassHelper.LIST_TYPE);
}
private boolean containsOnlyConstants(ListExpression list) {
for (Expression exp : list.getExpressions()) {
if (exp instanceof ConstantExpression) continue;
return false;
}
return true;
}
public void visitGStringExpression(GStringExpression expression) {
MethodVisitor mv = controller.getMethodVisitor();
mv.visitTypeInsn(NEW, "org/codehaus/groovy/runtime/GStringImpl");
mv.visitInsn(DUP);
int size = expression.getValues().size();
BytecodeHelper.pushConstant(mv, size);
mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
for (int i = 0; i < size; i++) {
mv.visitInsn(DUP);
BytecodeHelper.pushConstant(mv, i);
expression.getValue(i).visit(this);
controller.getOperandStack().box();
mv.visitInsn(AASTORE);
}
controller.getOperandStack().remove(size);
List strings = expression.getStrings();
size = strings.size();
BytecodeHelper.pushConstant(mv, size);
mv.visitTypeInsn(ANEWARRAY, "java/lang/String");
for (int i = 0; i < size; i++) {
mv.visitInsn(DUP);
BytecodeHelper.pushConstant(mv, i);
controller.getOperandStack().pushConstant((ConstantExpression) strings.get(i));
controller.getOperandStack().box();
mv.visitInsn(AASTORE);
}
controller.getOperandStack().remove(size);
mv.visitMethodInsn(INVOKESPECIAL, "org/codehaus/groovy/runtime/GStringImpl", "<init>", "([Ljava/lang/Object;[Ljava/lang/String;)V");
controller.getOperandStack().push(ClassHelper.GSTRING_TYPE);
}
/**
* Note: ignore it. Annotation generation needs the current visitor.
*/
public void visitAnnotations(AnnotatedNode node) {
}
private void visitAnnotations(AnnotatedNode targetNode, Object visitor) {
for (AnnotationNode an : targetNode.getAnnotations()) {
// skip built-in properties
if (an.isBuiltIn()) continue;
if (an.hasSourceRetention()) continue;
AnnotationVisitor av = getAnnotationVisitor(targetNode, an, visitor);
visitAnnotationAttributes(an, av);
av.visitEnd();
}
}
private void visitParameterAnnotations(Parameter parameter, int paramNumber, MethodVisitor mv) {
for (AnnotationNode an : parameter.getAnnotations()) {
// skip built-in properties
if (an.isBuiltIn()) continue;
if (an.hasSourceRetention()) continue;
final String annotationDescriptor = BytecodeHelper.getTypeDescription(an.getClassNode());
AnnotationVisitor av = mv.visitParameterAnnotation(paramNumber, annotationDescriptor, an.hasRuntimeRetention());
visitAnnotationAttributes(an, av);
av.visitEnd();
}
}
private AnnotationVisitor getAnnotationVisitor(AnnotatedNode targetNode, AnnotationNode an, Object visitor) {
final String annotationDescriptor = BytecodeHelper.getTypeDescription(an.getClassNode());
if (targetNode instanceof MethodNode) {
return ((MethodVisitor) visitor).visitAnnotation(annotationDescriptor, an.hasRuntimeRetention());
} else if (targetNode instanceof FieldNode) {
return ((FieldVisitor) visitor).visitAnnotation(annotationDescriptor, an.hasRuntimeRetention());
} else if (targetNode instanceof ClassNode) {
return ((ClassVisitor) visitor).visitAnnotation(annotationDescriptor, an.hasRuntimeRetention());
}
throwException("Cannot create an AnnotationVisitor. Please report Groovy bug");
return null;
}
/**
* Generate the annotation attributes.
* @param an the node with an annotation
* @param av the visitor to use
*/
private void visitAnnotationAttributes(AnnotationNode an, AnnotationVisitor av) {
Map<String, Object> constantAttrs = new HashMap<String, Object>();
Map<String, PropertyExpression> enumAttrs = new HashMap<String, PropertyExpression>();
Map<String, Object> atAttrs = new HashMap<String, Object>();
Map<String, ListExpression> arrayAttrs = new HashMap<String, ListExpression>();
for (String name : an.getMembers().keySet()) {
Expression expr = an.getMember(name);
if (expr instanceof AnnotationConstantExpression) {
atAttrs.put(name, ((AnnotationConstantExpression) expr).getValue());
} else if (expr instanceof ConstantExpression) {
constantAttrs.put(name, ((ConstantExpression) expr).getValue());
} else if (expr instanceof ClassExpression) {
constantAttrs.put(name,
Type.getType(BytecodeHelper.getTypeDescription((expr.getType()))));
} else if (expr instanceof PropertyExpression) {
enumAttrs.put(name, (PropertyExpression) expr);
} else if (expr instanceof ListExpression) {
arrayAttrs.put(name, (ListExpression) expr);
} else if (expr instanceof ClosureExpression) {
ClassNode closureClass = controller.getClosureWriter().getOrAddClosureClass((ClosureExpression) expr, ACC_PUBLIC);
constantAttrs.put(name,
Type.getType(BytecodeHelper.getTypeDescription(closureClass)));
}
}
for (Map.Entry entry : constantAttrs.entrySet()) {
av.visit((String) entry.getKey(), entry.getValue());
}
for (Map.Entry entry : enumAttrs.entrySet()) {
PropertyExpression propExp = (PropertyExpression) entry.getValue();
av.visitEnum((String) entry.getKey(),
BytecodeHelper.getTypeDescription(propExp.getObjectExpression().getType()),
String.valueOf(((ConstantExpression) propExp.getProperty()).getValue()));
}
for (Map.Entry entry : atAttrs.entrySet()) {
AnnotationNode atNode = (AnnotationNode) entry.getValue();
AnnotationVisitor av2 = av.visitAnnotation((String) entry.getKey(),
BytecodeHelper.getTypeDescription(atNode.getClassNode()));
visitAnnotationAttributes(atNode, av2);
av2.visitEnd();
}
visitArrayAttributes(an, arrayAttrs, av);
}
private void visitArrayAttributes(AnnotationNode an, Map<String, ListExpression> arrayAttr, AnnotationVisitor av) {
if (arrayAttr.isEmpty()) return;
for (Map.Entry entry : arrayAttr.entrySet()) {
AnnotationVisitor av2 = av.visitArray((String) entry.getKey());
List<Expression> values = ((ListExpression) entry.getValue()).getExpressions();
if (!values.isEmpty()) {
int arrayElementType = determineCommonArrayType(values);
for (Expression exprChild : values) {
visitAnnotationArrayElement(exprChild, arrayElementType, av2);
}
}
av2.visitEnd();
}
}
private int determineCommonArrayType(List values) {
Expression expr = (Expression) values.get(0);
int arrayElementType = -1;
if (expr instanceof AnnotationConstantExpression) {
arrayElementType = 1;
} else if (expr instanceof ConstantExpression) {
arrayElementType = 2;
} else if (expr instanceof ClassExpression) {
arrayElementType = 3;
} else if (expr instanceof PropertyExpression) {
arrayElementType = 4;
}
return arrayElementType;
}
private void visitAnnotationArrayElement(Expression expr, int arrayElementType, AnnotationVisitor av) {
switch (arrayElementType) {
case 1:
AnnotationNode atAttr = (AnnotationNode) ((AnnotationConstantExpression) expr).getValue();
AnnotationVisitor av2 = av.visitAnnotation(null, BytecodeHelper.getTypeDescription(atAttr.getClassNode()));
visitAnnotationAttributes(atAttr, av2);
av2.visitEnd();
break;
case 2:
av.visit(null, ((ConstantExpression) expr).getValue());
break;
case 3:
av.visit(null, Type.getType(BytecodeHelper.getTypeDescription(expr.getType())));
break;
case 4:
PropertyExpression propExpr = (PropertyExpression) expr;
av.visitEnum(null,
BytecodeHelper.getTypeDescription(propExpr.getObjectExpression().getType()),
String.valueOf(((ConstantExpression) propExpr.getProperty()).getValue()));
break;
}
}
// Implementation methods
//-------------------------------------------------------------------------
public void visitBytecodeExpression(BytecodeExpression cle) {
cle.visit(controller.getMethodVisitor());
controller.getOperandStack().push(cle.getType());
}
public static boolean isThisExpression(Expression expression) {
if (expression instanceof VariableExpression) {
VariableExpression varExp = (VariableExpression) expression;
return varExp.getName().equals("this");
}
return false;
}
private static boolean isSuperExpression(Expression expression) {
if (expression instanceof VariableExpression) {
VariableExpression varExp = (VariableExpression) expression;
return varExp.getName().equals("super");
}
return false;
}
private static boolean isThisOrSuper(Expression expression) {
return isThisExpression(expression) || isSuperExpression(expression);
}
public void onLineNumber(ASTNode statement, String message) {
MethodVisitor mv = controller.getMethodVisitor();
if (statement==null) return;
int line = statement.getLineNumber();
this.currentASTNode = statement;
if (line < 0) return;
if (!ASM_DEBUG && line==lineNumber) return;
lineNumber = line;
if (mv != null) {
Label l = new Label();
mv.visitLabel(l);
mv.visitLineNumber(line, l);
}
}
private boolean isInnerClass() {
return controller.getClassNode() instanceof InnerClassNode;
}
protected CompileUnit getCompileUnit() {
CompileUnit answer = controller.getClassNode().getCompileUnit();
if (answer == null) {
answer = context.getCompileUnit();
}
return answer;
}
protected int getBytecodeVersion() {
ClassNode classNode = controller.getClassNode();
if ( !classNode.isUsingGenerics() &&
!classNode.isAnnotated() &&
!classNode.isAnnotationDefinition() )
{
return Opcodes.V1_3;
}
final String target = getCompileUnit().getConfig().getTargetBytecode();
return CompilerConfiguration.POST_JDK5.equals(target) ? Opcodes.V1_5 : Opcodes.V1_3;
}
public boolean addInnerClass(ClassNode innerClass) {
innerClass.setModule(controller.getClassNode().getModule());
return innerClasses.add(innerClass);
}
}