/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.asm.sc;
import org.codehaus.groovy.GroovyBugError;
import org.codehaus.groovy.ast.*;
import org.codehaus.groovy.ast.expr.*;
import org.codehaus.groovy.ast.stmt.EmptyStatement;
import org.codehaus.groovy.classgen.BytecodeExpression;
import org.codehaus.groovy.classgen.asm.*;
import org.codehaus.groovy.runtime.InvokerHelper;
import org.codehaus.groovy.runtime.MetaClassHelper;
import org.codehaus.groovy.syntax.SyntaxException;
import org.codehaus.groovy.transform.sc.StaticCompilationMetadataKeys;
import org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport;
import org.codehaus.groovy.transform.stc.StaticTypesMarker;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import java.lang.reflect.Modifier;
import java.util.*;
import static org.codehaus.groovy.ast.ClassHelper.*;
import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.*;
/**
* A call site writer which replaces call site caching with static calls. This means that the generated code
* looks more like Java code than dynamic Groovy code. Best effort is made to use JVM instructions instead of
* calls to helper methods.
*
* @author Cedric Champeau
*/
public class StaticTypesCallSiteWriter extends CallSiteWriter implements Opcodes {
private static final ClassNode INVOKERHELPER_TYPE = ClassHelper.make(InvokerHelper.class);
private static final MethodNode GROOVYOBJECT_GETPROPERTY_METHOD = GROOVY_OBJECT_TYPE.getMethod("getProperty", new Parameter[]{new Parameter(STRING_TYPE, "propertyName")});
private static final MethodNode INVOKERHELPER_GETPROPERTY_METHOD = INVOKERHELPER_TYPE.getMethod("getProperty", new Parameter[]{new Parameter(OBJECT_TYPE, "object"), new Parameter(STRING_TYPE, "propertyName")});
private static final MethodNode INVOKERHELPER_GETPROPERTYSAFE_METHOD = INVOKERHELPER_TYPE.getMethod("getPropertySafe", new Parameter[]{new Parameter(OBJECT_TYPE, "object"), new Parameter(STRING_TYPE, "propertyName")});
private static final MethodNode CLOSURE_GETTHISOBJECT_METHOD = CLOSURE_TYPE.getMethod("getThisObject", new Parameter[0]);
private static final ClassNode COLLECTION_TYPE = make(Collection.class);
private static final MethodNode COLLECTION_SIZE_METHOD = COLLECTION_TYPE.getMethod("size", Parameter.EMPTY_ARRAY);
private static final MethodNode MAP_GET_METHOD = MAP_TYPE.getMethod("get", new Parameter[] { new Parameter(OBJECT_TYPE, "key")});
private final StaticTypesWriterController controller;
public StaticTypesCallSiteWriter(final StaticTypesWriterController controller) {
super(controller);
this.controller = controller;
}
@Override
public void generateCallSiteArray() {
CallSiteWriter regularCallSiteWriter = controller.getRegularCallSiteWriter();
if (regularCallSiteWriter.hasCallSiteUse()) {
regularCallSiteWriter.generateCallSiteArray();
}
}
@Override
public void makeCallSite(final Expression receiver, final String message, final Expression arguments, final boolean safe, final boolean implicitThis, final boolean callCurrent, final boolean callStatic) {
}
@Override
public void makeGetPropertySite(Expression receiver, final String methodName, final boolean safe, final boolean implicitThis) {
Object dynamic = receiver.getNodeMetaData(StaticCompilationMetadataKeys.RECEIVER_OF_DYNAMIC_PROPERTY);
if (dynamic !=null) {
makeDynamicGetProperty(receiver, methodName, safe);
return;
}
TypeChooser typeChooser = controller.getTypeChooser();
ClassNode classNode = controller.getClassNode();
ClassNode receiverType = receiver.getNodeMetaData(StaticCompilationMetadataKeys.PROPERTY_OWNER);
if (receiverType==null) {
receiverType = typeChooser.resolveType(receiver, classNode);
}
Object type = receiver.getNodeMetaData(StaticTypesMarker.INFERRED_TYPE);
if (type==null && receiver instanceof VariableExpression) {
Variable variable = ((VariableExpression) receiver).getAccessedVariable();
if (variable instanceof Expression) {
type = ((Expression) variable).getNodeMetaData(StaticTypesMarker.INFERRED_TYPE);
}
}
if (type!=null) {
// in case a "flow type" is found, it is preferred to use it instead of
// the declaration type
receiverType = (ClassNode) type;
}
boolean isClassReceiver = false;
if (isClassClassNodeWrappingConcreteType(receiverType)) {
isClassReceiver = true;
receiverType = receiverType.getGenericsTypes()[0].getType();
}
if (isPrimitiveType(receiverType)) {
// GROOVY-6590: wrap primitive types
receiverType = getWrapper(receiverType);
}
MethodVisitor mv = controller.getMethodVisitor();
if (receiverType.isArray() && methodName.equals("length")) {
receiver.visit(controller.getAcg());
ClassNode arrayGetReturnType = typeChooser.resolveType(receiver, classNode);
controller.getOperandStack().doGroovyCast(arrayGetReturnType);
mv.visitInsn(ARRAYLENGTH);
controller.getOperandStack().replace(int_TYPE);
return;
} else if (
(receiverType.implementsInterface(COLLECTION_TYPE)
|| COLLECTION_TYPE.equals(receiverType)) && ("size".equals(methodName) || "length".equals(methodName))) {
MethodCallExpression expr = new MethodCallExpression(
receiver,
"size",
ArgumentListExpression.EMPTY_ARGUMENTS
);
expr.setMethodTarget(COLLECTION_SIZE_METHOD);
expr.setImplicitThis(implicitThis);
expr.setSafe(safe);
expr.visit(controller.getAcg());
return;
}
boolean isStaticProperty = receiver instanceof ClassExpression
&& (receiverType.isDerivedFrom(receiver.getType()) || receiverType.implementsInterface(receiver.getType()));
if (!isStaticProperty && (receiverType.implementsInterface(MAP_TYPE) || MAP_TYPE.equals(receiverType))) {
// for maps, replace map.foo with map.get('foo')
writeMapDotProperty(receiver, methodName, mv, safe);
return;
}
if (makeGetPropertyWithGetter(receiver, receiverType, methodName, safe, implicitThis)) return;
if (makeGetField(receiver, receiverType, methodName, safe, implicitThis, samePackages(receiverType.getPackageName(), classNode.getPackageName()))) return;
if (receiverType.isEnum()) {
mv.visitFieldInsn(GETSTATIC, BytecodeHelper.getClassInternalName(receiverType), methodName, BytecodeHelper.getTypeDescription(receiverType));
controller.getOperandStack().push(receiverType);
return;
}
if (receiver instanceof ClassExpression) {
if (makeGetField(receiver, receiver.getType(), methodName, safe, implicitThis, samePackages(receiver.getType().getPackageName(), classNode.getPackageName()))) return;
if (makeGetPropertyWithGetter(receiver, receiver.getType(), methodName, safe, implicitThis)) return;
if (makeGetPrivateFieldWithBridgeMethod(receiver, receiver.getType(), methodName, safe, implicitThis)) return;
}
if (isClassReceiver) {
// we are probably looking for a property of the class
if (makeGetPropertyWithGetter(receiver, CLASS_Type, methodName, safe, implicitThis)) return;
if (makeGetField(receiver, CLASS_Type, methodName, safe, false, true)) return;
}
if (makeGetPrivateFieldWithBridgeMethod(receiver, receiverType, methodName, safe, implicitThis)) return;
// GROOVY-5580, it is still possible that we're calling a superinterface property
String getterName = "get" + MetaClassHelper.capitalize(methodName);
String altGetterName = "is" + MetaClassHelper.capitalize(methodName);
if (receiverType.isInterface()) {
Set<ClassNode> allInterfaces = receiverType.getAllInterfaces();
MethodNode getterMethod = null;
for (ClassNode anInterface : allInterfaces) {
getterMethod = anInterface.getGetterMethod(getterName);
if (getterMethod == null) getterMethod = anInterface.getGetterMethod(altGetterName);
if (getterMethod != null) break;
}
// GROOVY-5585
if (getterMethod == null) {
getterMethod = OBJECT_TYPE.getGetterMethod(getterName);
}
if (getterMethod != null) {
MethodCallExpression call = new MethodCallExpression(
receiver,
getterName,
ArgumentListExpression.EMPTY_ARGUMENTS
);
call.setMethodTarget(getterMethod);
call.setImplicitThis(false);
call.setSourcePosition(receiver);
call.setSafe(safe);
call.visit(controller.getAcg());
return;
}
}
// GROOVY-5568, we would be facing a DGM call, but instead of foo.getText(), have foo.text
List<MethodNode> methods = findDGMMethodsByNameAndArguments(controller.getSourceUnit().getClassLoader(), receiverType, getterName, ClassNode.EMPTY_ARRAY);
for (MethodNode m: findDGMMethodsByNameAndArguments(controller.getSourceUnit().getClassLoader(), receiverType, altGetterName, ClassNode.EMPTY_ARRAY)) {
if (Boolean_TYPE.equals(getWrapper(m.getReturnType()))) methods.add(m);
}
if (!methods.isEmpty()) {
List<MethodNode> methodNodes = chooseBestMethod(receiverType, methods, ClassNode.EMPTY_ARRAY);
if (methodNodes.size() == 1) {
MethodNode getter = methodNodes.get(0);
MethodCallExpression call = new MethodCallExpression(
receiver,
getter.getName(),
ArgumentListExpression.EMPTY_ARGUMENTS
);
call.setMethodTarget(getter);
call.setImplicitThis(false);
call.setSafe(safe);
call.setSourcePosition(receiver);
call.visit(controller.getAcg());
return;
}
}
if (!isStaticProperty && (receiverType.implementsInterface(LIST_TYPE) || LIST_TYPE.equals(receiverType))) {
writeListDotProperty(receiver, methodName, mv, safe);
return;
}
controller.getSourceUnit().addError(
new SyntaxException("Access to "+
(receiver instanceof ClassExpression ?receiver.getType():receiverType).toString(false)
+"#"+methodName+" is forbidden", receiver.getLineNumber(), receiver.getColumnNumber(), receiver.getLastLineNumber(), receiver.getLastColumnNumber())
);
controller.getMethodVisitor().visitInsn(ACONST_NULL);
controller.getOperandStack().push(OBJECT_TYPE);
}
private void makeDynamicGetProperty(final Expression receiver, final String methodName, final boolean safe) {
MethodNode target = safe?INVOKERHELPER_GETPROPERTYSAFE_METHOD:INVOKERHELPER_GETPROPERTY_METHOD;
MethodCallExpression mce = new MethodCallExpression(
new ClassExpression(INVOKERHELPER_TYPE),
target.getName(),
new ArgumentListExpression(receiver, new ConstantExpression(methodName))
);
mce.setSafe(false);
mce.setImplicitThis(false);
mce.setMethodTarget(target);
mce.visit(controller.getAcg());
}
private void writeMapDotProperty(final Expression receiver, final String methodName, final MethodVisitor mv, final boolean safe) {
receiver.visit(controller.getAcg()); // load receiver
Label exit = new Label();
if (safe) {
Label doGet = new Label();
mv.visitJumpInsn(IFNONNULL, doGet);
controller.getOperandStack().remove(1);
mv.visitInsn(ACONST_NULL);
mv.visitJumpInsn(GOTO, exit);
mv.visitLabel(doGet);
receiver.visit(controller.getAcg());
}
mv.visitLdcInsn(methodName); // load property name
mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Map", "get", "(Ljava/lang/Object;)Ljava/lang/Object;", true);
if (safe) {
mv.visitLabel(exit);
}
controller.getOperandStack().replace(OBJECT_TYPE);
}
private void writeListDotProperty(final Expression receiver, final String methodName, final MethodVisitor mv, final boolean safe) {
ClassNode componentType = (ClassNode) receiver.getNodeMetaData(StaticCompilationMetadataKeys.COMPONENT_TYPE);
if (componentType==null) {
componentType = OBJECT_TYPE;
}
// for lists, replace list.foo with:
// def result = new ArrayList(list.size())
// for (e in list) { result.add (e.foo) }
// result
CompileStack compileStack = controller.getCompileStack();
Label exit = new Label();
if (safe) {
receiver.visit(controller.getAcg());
Label doGet = new Label();
mv.visitJumpInsn(IFNONNULL, doGet);
controller.getOperandStack().remove(1);
mv.visitInsn(ACONST_NULL);
mv.visitJumpInsn(GOTO, exit);
mv.visitLabel(doGet);
}
Variable tmpList = new VariableExpression("tmpList", make(ArrayList.class));
int var = compileStack.defineTemporaryVariable(tmpList, false);
Variable iterator = new VariableExpression("iterator", Iterator_TYPE);
int it = compileStack.defineTemporaryVariable(iterator, false);
Variable nextVar = new VariableExpression("next", componentType);
final int next = compileStack.defineTemporaryVariable(nextVar, false);
mv.visitTypeInsn(NEW, "java/util/ArrayList");
mv.visitInsn(DUP);
receiver.visit(controller.getAcg());
mv.visitMethodInsn(INVOKEINTERFACE, "java/util/List", "size", "()I", true);
controller.getOperandStack().remove(1);
mv.visitMethodInsn(INVOKESPECIAL, "java/util/ArrayList", "<init>", "(I)V", false);
mv.visitVarInsn(ASTORE, var);
Label l1 = new Label();
mv.visitLabel(l1);
receiver.visit(controller.getAcg());
mv.visitMethodInsn(INVOKEINTERFACE, "java/util/List", "iterator", "()Ljava/util/Iterator;", true);
controller.getOperandStack().remove(1);
mv.visitVarInsn(ASTORE, it);
Label l2 = new Label();
mv.visitLabel(l2);
mv.visitVarInsn(ALOAD, it);
mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "hasNext", "()Z", true);
Label l3 = new Label();
mv.visitJumpInsn(IFEQ, l3);
mv.visitVarInsn(ALOAD, it);
mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "next", "()Ljava/lang/Object;", true);
mv.visitTypeInsn(CHECKCAST, BytecodeHelper.getClassInternalName(componentType));
mv.visitVarInsn(ASTORE, next);
Label l4 = new Label();
mv.visitLabel(l4);
mv.visitVarInsn(ALOAD, var);
final ClassNode finalComponentType = componentType;
PropertyExpression pexp = new PropertyExpression(new BytecodeExpression() {
@Override
public void visit(final MethodVisitor mv) {
mv.visitVarInsn(ALOAD, next);
}
@Override
public ClassNode getType() {
return finalComponentType;
}
}, methodName);
pexp.visit(controller.getAcg());
controller.getOperandStack().box();
controller.getOperandStack().remove(1);
mv.visitMethodInsn(INVOKEINTERFACE, "java/util/List", "add", "(Ljava/lang/Object;)Z", true);
mv.visitInsn(POP);
Label l5 = new Label();
mv.visitLabel(l5);
mv.visitJumpInsn(GOTO, l2);
mv.visitLabel(l3);
mv.visitVarInsn(ALOAD, var);
if (safe) {
mv.visitLabel(exit);
}
controller.getOperandStack().push(make(ArrayList.class));
controller.getCompileStack().removeVar(next);
controller.getCompileStack().removeVar(it);
controller.getCompileStack().removeVar(var);
}
@SuppressWarnings("unchecked")
private boolean makeGetPrivateFieldWithBridgeMethod(final Expression receiver, final ClassNode receiverType, final String fieldName, final boolean safe, final boolean implicitThis) {
FieldNode field = receiverType.getField(fieldName);
ClassNode outerClass = receiverType.getOuterClass();
if (field==null && implicitThis && outerClass !=null && !receiverType.isStaticClass()) {
Expression pexp;
if (controller.isInClosure()) {
MethodCallExpression mce = new MethodCallExpression(
new VariableExpression("this"),
"getThisObject",
ArgumentListExpression.EMPTY_ARGUMENTS
);
mce.putNodeMetaData(StaticTypesMarker.INFERRED_TYPE, controller.getOutermostClass());
mce.setImplicitThis(true);
mce.setMethodTarget(CLOSURE_GETTHISOBJECT_METHOD);
pexp = new CastExpression(controller.getOutermostClass(),mce);
} else {
pexp = new PropertyExpression(
new ClassExpression(outerClass),
"this"
);
((PropertyExpression)pexp).setImplicitThis(true);
}
pexp.putNodeMetaData(StaticTypesMarker.INFERRED_TYPE, outerClass);
pexp.setSourcePosition(receiver);
return makeGetPrivateFieldWithBridgeMethod(pexp, outerClass, fieldName, safe, true);
}
ClassNode classNode = controller.getClassNode();
if (field!=null && Modifier.isPrivate(field.getModifiers())
&& (StaticInvocationWriter.isPrivateBridgeMethodsCallAllowed(receiverType, classNode) || StaticInvocationWriter.isPrivateBridgeMethodsCallAllowed(classNode,receiverType))
&& !receiverType.equals(classNode)) {
Map<String, MethodNode> accessors = (Map<String, MethodNode>) receiverType.redirect().getNodeMetaData(StaticCompilationMetadataKeys.PRIVATE_FIELDS_ACCESSORS);
if (accessors!=null) {
MethodNode methodNode = accessors.get(fieldName);
if (methodNode!=null) {
MethodCallExpression mce = new MethodCallExpression(receiver, methodNode.getName(),
new ArgumentListExpression(field.isStatic()?new ConstantExpression(null):receiver));
mce.setMethodTarget(methodNode);
mce.setSafe(safe);
mce.setImplicitThis(implicitThis);
mce.visit(controller.getAcg());
return true;
}
}
}
return false;
}
@Override
public void makeGroovyObjectGetPropertySite(final Expression receiver, final String methodName, final boolean safe, final boolean implicitThis) {
TypeChooser typeChooser = controller.getTypeChooser();
ClassNode classNode = controller.getClassNode();
ClassNode receiverType = typeChooser.resolveType(receiver, classNode);
if (receiver instanceof VariableExpression && ((VariableExpression) receiver).isThisExpression() && !controller.isInClosure()) {
receiverType = classNode;
}
String property = methodName;
if (implicitThis) {
if (controller.getInvocationWriter() instanceof StaticInvocationWriter) {
MethodCallExpression currentCall = ((StaticInvocationWriter) controller.getInvocationWriter()).getCurrentCall();
if (currentCall != null && currentCall.getNodeMetaData(StaticTypesMarker.IMPLICIT_RECEIVER) != null) {
property = (String) currentCall.getNodeMetaData(StaticTypesMarker.IMPLICIT_RECEIVER);
String[] props = property.split("\\.");
BytecodeExpression thisLoader = new BytecodeExpression() {
@Override
public void visit(final MethodVisitor mv) {
mv.visitVarInsn(ALOAD, 0); // load this
}
};
thisLoader.setType(CLOSURE_TYPE);
Expression pexp = new PropertyExpression(thisLoader, new ConstantExpression(props[0]), safe);
for (int i = 1, propsLength = props.length; i < propsLength; i++) {
final String prop = props[i];
pexp.putNodeMetaData(StaticTypesMarker.INFERRED_TYPE, CLOSURE_TYPE);
pexp = new PropertyExpression(pexp, prop);
}
pexp.visit(controller.getAcg());
return;
}
}
}
if (makeGetPropertyWithGetter(receiver, receiverType, property, safe, implicitThis)) return;
if (makeGetPrivateFieldWithBridgeMethod(receiver, receiverType, property, safe, implicitThis)) return;
if (makeGetField(receiver, receiverType, property, safe, implicitThis, samePackages(receiverType.getPackageName(), classNode.getPackageName()))) return;
MethodCallExpression call = new MethodCallExpression(
receiver,
"getProperty",
new ArgumentListExpression(new ConstantExpression(property))
);
call.setImplicitThis(implicitThis);
call.setSafe(safe);
call.setMethodTarget(GROOVYOBJECT_GETPROPERTY_METHOD);
call.visit(controller.getAcg());
return;
}
@Override
public void makeCallSiteArrayInitializer() {
}
private boolean makeGetPropertyWithGetter(final Expression receiver, final ClassNode receiverType, final String methodName, final boolean safe, final boolean implicitThis) {
// does a getter exists ?
String getterName = "get" + MetaClassHelper.capitalize(methodName);
MethodNode getterNode = receiverType.getGetterMethod(getterName);
if (getterNode==null) {
getterName = "is" + MetaClassHelper.capitalize(methodName);
getterNode = receiverType.getGetterMethod(getterName);
}
if (getterNode!=null && receiver instanceof ClassExpression && !CLASS_Type.equals(receiverType) && !getterNode.isStatic()) {
return false;
}
// GROOVY-5561: if two files are compiled in the same source unit
// and that one references the other, the getters for properties have not been
// generated by the compiler yet (generated by the Verifier)
PropertyNode propertyNode = receiverType.getProperty(methodName);
if (getterNode == null && propertyNode != null) {
// it is possible to use a getter
String prefix = "get";
if (boolean_TYPE.equals(propertyNode.getOriginType())) {
prefix = "is";
}
getterName = prefix + MetaClassHelper.capitalize(methodName);
getterNode = new MethodNode(
getterName,
ACC_PUBLIC,
propertyNode.getOriginType(),
Parameter.EMPTY_ARRAY,
ClassNode.EMPTY_ARRAY,
EmptyStatement.INSTANCE);
getterNode.setDeclaringClass(receiverType);
if (propertyNode.isStatic()) getterNode.setModifiers(ACC_PUBLIC + ACC_STATIC);
}
if (getterNode!=null) {
MethodCallExpression call = new MethodCallExpression(
receiver,
getterName,
ArgumentListExpression.EMPTY_ARGUMENTS
);
call.setSourcePosition(receiver);
call.setMethodTarget(getterNode);
call.setImplicitThis(implicitThis);
call.setSafe(safe);
call.visit(controller.getAcg());
return true;
}
if (receiverType instanceof InnerClassNode && !receiverType.isStaticClass()) {
if (makeGetPropertyWithGetter(receiver, receiverType.getOuterClass(), methodName, safe, implicitThis)) {
return true;
}
}
// check direct interfaces (GROOVY-7149)
for (ClassNode node : receiverType.getInterfaces()) {
if (makeGetPropertyWithGetter(receiver, node, methodName, safe, implicitThis)) {
return true;
}
}
// go upper level
ClassNode superClass = receiverType.getSuperClass();
if (superClass !=null) {
return makeGetPropertyWithGetter(receiver, superClass, methodName, safe, implicitThis);
}
return false;
}
boolean makeGetField(final Expression receiver, final ClassNode receiverType, final String fieldName, final boolean safe, final boolean implicitThis, final boolean samePackage) {
FieldNode field = receiverType.getField(fieldName);
// direct access is allowed if we are in the same class as the declaring class
// or we are in an inner class
if (field !=null
&& isDirectAccessAllowed(field, controller.getClassNode(), samePackage)) {
CompileStack compileStack = controller.getCompileStack();
MethodVisitor mv = controller.getMethodVisitor();
ClassNode replacementType = field.getOriginType();
OperandStack operandStack = controller.getOperandStack();
if (field.isStatic()) {
mv.visitFieldInsn(GETSTATIC, BytecodeHelper.getClassInternalName(field.getOwner()), fieldName, BytecodeHelper.getTypeDescription(replacementType));
operandStack.push(replacementType);
} else {
if (implicitThis) {
compileStack.pushImplicitThis(implicitThis);
}
receiver.visit(controller.getAcg());
if (implicitThis) compileStack.popImplicitThis();
Label exit = new Label();
if (safe) {
mv.visitInsn(DUP);
Label doGet = new Label();
mv.visitJumpInsn(IFNONNULL, doGet);
mv.visitInsn(POP);
mv.visitInsn(ACONST_NULL);
mv.visitJumpInsn(GOTO, exit);
mv.visitLabel(doGet);
}
if (!operandStack.getTopOperand().isDerivedFrom(field.getOwner())) {
mv.visitTypeInsn(CHECKCAST, BytecodeHelper.getClassInternalName(field.getOwner()));
}
mv.visitFieldInsn(GETFIELD, BytecodeHelper.getClassInternalName(field.getOwner()), fieldName, BytecodeHelper.getTypeDescription(replacementType));
if (safe) {
if (ClassHelper.isPrimitiveType(replacementType)) {
operandStack.replace(replacementType);
operandStack.box();
replacementType = operandStack.getTopOperand();
}
mv.visitLabel(exit);
}
}
operandStack.replace(replacementType);
return true;
}
for (ClassNode intf : receiverType.getInterfaces()) {
// GROOVY-7039
if (intf!=receiverType && makeGetField(receiver, intf, fieldName, safe, implicitThis, false)) {
return true;
}
}
ClassNode superClass = receiverType.getSuperClass();
if (superClass !=null) {
return makeGetField(receiver, superClass, fieldName, safe, implicitThis, false);
}
return false;
}
private static boolean samePackages(final String pkg1, final String pkg2) {
return (
(pkg1 ==null && pkg2 ==null)
|| pkg1 !=null && pkg1.equals(pkg2)
);
}
private static boolean isDirectAccessAllowed(FieldNode a, ClassNode receiver, boolean isSamePackage) {
ClassNode declaringClass = a.getDeclaringClass().redirect();
ClassNode receiverType = receiver.redirect();
// first, direct access from within the class or inner class nodes
if (declaringClass.equals(receiverType)) return true;
if (receiverType instanceof InnerClassNode) {
while (receiverType!=null && receiverType instanceof InnerClassNode) {
if (declaringClass.equals(receiverType)) return true;
receiverType = receiverType.getOuterClass();
}
}
// no getter
return a.isPublic() || (a.isProtected() && isSamePackage);
}
@Override
public void makeSiteEntry() {
}
@Override
public void prepareCallSite(final String message) {
}
@Override
public void makeSingleArgumentCall(final Expression receiver, final String message, final Expression arguments, boolean safe) {
TypeChooser typeChooser = controller.getTypeChooser();
ClassNode classNode = controller.getClassNode();
ClassNode rType = typeChooser.resolveType(receiver, classNode);
ClassNode aType = typeChooser.resolveType(arguments, classNode);
if (trySubscript(receiver, message, arguments, rType, aType, safe)) {
return;
}
// now try with flow type instead of declaration type
rType = receiver.getNodeMetaData(StaticTypesMarker.INFERRED_TYPE);
if (receiver instanceof VariableExpression && receiver.getNodeMetaData().isEmpty()) {
// TODO: can STCV be made smarter to avoid this check?
VariableExpression ve = (VariableExpression) ((VariableExpression)receiver).getAccessedVariable();
rType = ve.getNodeMetaData(StaticTypesMarker.INFERRED_TYPE);
}
if (rType!=null && trySubscript(receiver, message, arguments, rType, aType, safe)) {
return;
}
// todo: more cases
throw new GroovyBugError(
"At line " + receiver.getLineNumber() + " column " + receiver.getColumnNumber() + "\n" +
"On receiver: " + receiver.getText() + " with message: " + message + " and arguments: " + arguments.getText() + "\n" +
"This method should not have been called. Please try to create a simple example reproducing\n" +
"this error and file a bug report at https://issues.apache.org/jira/browse/GROOVY");
}
private boolean trySubscript(final Expression receiver, final String message, final Expression arguments, ClassNode rType, final ClassNode aType, boolean safe) {
if (getWrapper(rType).isDerivedFrom(Number_TYPE)
&& getWrapper(aType).isDerivedFrom(Number_TYPE)) {
if ("plus".equals(message) || "minus".equals(message) || "multiply".equals(message) || "div".equals(message)) {
writeNumberNumberCall(receiver, message, arguments);
return true;
} else if ("power".equals(message)) {
writePowerCall(receiver, arguments, rType, aType);
return true;
} else if ("mod".equals(message) || "leftShift".equals(message) || "rightShift".equals(message) || "rightShiftUnsigned".equals(message)) {
writeOperatorCall(receiver, arguments, message);
return true;
}
} else if (STRING_TYPE.equals(rType) && "plus".equals(message)) {
writeStringPlusCall(receiver, message, arguments);
return true;
} else if ("getAt".equals(message)) {
if (rType.isArray() && getWrapper(aType).isDerivedFrom(Number_TYPE) && !safe) {
writeArrayGet(receiver, arguments, rType, aType);
return true;
} else {
// check if a getAt method can be found on the receiver
ClassNode current = rType;
MethodNode getAtNode = null;
while (current!=null && getAtNode==null) {
getAtNode = current.getDeclaredMethod("getAt", new Parameter[]{new Parameter(aType, "index")});
if (getAtNode == null) {
getAtNode = getCompatibleMethod(current, "getAt", aType);
}
if (getAtNode==null && isPrimitiveType(aType)) {
getAtNode = current.getDeclaredMethod("getAt", new Parameter[]{new Parameter(getWrapper(aType), "index")});
if (getAtNode == null) {
getAtNode = getCompatibleMethod(current, "getAt", getWrapper(aType));
}
} else if (getAtNode==null && aType.isDerivedFrom(Number_TYPE)) {
getAtNode = current.getDeclaredMethod("getAt", new Parameter[]{new Parameter(getUnwrapper(aType), "index")});
if (getAtNode == null) {
getAtNode = getCompatibleMethod(current, "getAt", getUnwrapper(aType));
}
}
current = current.getSuperClass();
}
if (getAtNode!=null) {
MethodCallExpression call = new MethodCallExpression(
receiver,
"getAt",
arguments
);
call.setSafe(safe);
call.setSourcePosition(arguments);
call.setImplicitThis(false);
call.setMethodTarget(getAtNode);
call.visit(controller.getAcg());
return true;
}
// make sure Map#getAt() and List#getAt handled with the bracket syntax are properly compiled
ClassNode[] args = {aType};
boolean acceptAnyMethod =
MAP_TYPE.equals(rType) || rType.implementsInterface(MAP_TYPE)
|| LIST_TYPE.equals(rType) || rType.implementsInterface(LIST_TYPE);
List<MethodNode> nodes = StaticTypeCheckingSupport.findDGMMethodsByNameAndArguments(controller.getSourceUnit().getClassLoader(), rType, message, args);
if (nodes.isEmpty()) {
// retry with raw types
rType = rType.getPlainNodeReference();
nodes = StaticTypeCheckingSupport.findDGMMethodsByNameAndArguments(controller.getSourceUnit().getClassLoader(), rType, message, args);
}
nodes = StaticTypeCheckingSupport.chooseBestMethod(rType, nodes, args);
if (nodes.size()==1 || nodes.size()>1 && acceptAnyMethod) {
MethodNode methodNode = nodes.get(0);
MethodCallExpression call = new MethodCallExpression(
receiver,
message,
arguments
);
call.setSafe(safe);
call.setSourcePosition(arguments);
call.setImplicitThis(false);
call.setMethodTarget(methodNode);
call.visit(controller.getAcg());
return true;
}
if (implementsInterfaceOrIsSubclassOf(rType, MAP_TYPE)) {
// fallback to Map#get
MethodCallExpression call = new MethodCallExpression(
receiver,
"get",
arguments
);
call.setSafe(safe);
call.setMethodTarget(MAP_GET_METHOD);
call.setSourcePosition(arguments);
call.setImplicitThis(false);
call.visit(controller.getAcg());
return true;
}
}
}
return false;
}
private MethodNode getCompatibleMethod(ClassNode current, String getAt, ClassNode aType) {
// TODO this really should find "best" match or find all matches and complain about ambiguity if more than one
// TODO handle getAt with more than one parameter
// TODO handle default getAt methods on Java 8 interfaces
for (MethodNode methodNode : current.getDeclaredMethods("getAt")) {
if (methodNode.getParameters().length == 1) {
ClassNode paramType = methodNode.getParameters()[0].getType();
if (aType.isDerivedFrom(paramType) || aType.declaresInterface(paramType)) {
return methodNode;
}
}
}
return null;
}
private void writeArrayGet(final Expression receiver, final Expression arguments, final ClassNode rType, final ClassNode aType) {
OperandStack operandStack = controller.getOperandStack();
int m1 = operandStack.getStackLength();
// visit receiver
receiver.visit(controller.getAcg());
// visit arguments as array index
arguments.visit(controller.getAcg());
operandStack.doGroovyCast(int_TYPE);
int m2 = operandStack.getStackLength();
// array access
controller.getMethodVisitor().visitInsn(AALOAD);
operandStack.replace(rType.getComponentType(), m2-m1);
}
private void writeOperatorCall(Expression receiver, Expression arguments, String operator) {
prepareSiteAndReceiver(receiver, operator, false, controller.getCompileStack().isLHS());
controller.getOperandStack().doGroovyCast(Number_TYPE);
visitBoxedArgument(arguments);
controller.getOperandStack().doGroovyCast(Number_TYPE);
MethodVisitor mv = controller.getMethodVisitor();
mv.visitMethodInsn(INVOKESTATIC, "org/codehaus/groovy/runtime/typehandling/NumberMath", operator, "(Ljava/lang/Number;Ljava/lang/Number;)Ljava/lang/Number;", false);
controller.getOperandStack().replace(Number_TYPE, 2);
}
private void writePowerCall(Expression receiver, Expression arguments, final ClassNode rType, ClassNode aType) {
OperandStack operandStack = controller.getOperandStack();
int m1 = operandStack.getStackLength();
//slow Path
prepareSiteAndReceiver(receiver, "power", false, controller.getCompileStack().isLHS());
operandStack.doGroovyCast(getWrapper(rType));
visitBoxedArgument(arguments);
operandStack.doGroovyCast(getWrapper(aType));
int m2 = operandStack.getStackLength();
MethodVisitor mv = controller.getMethodVisitor();
if (BigDecimal_TYPE.equals(rType) && Integer_TYPE.equals(getWrapper(aType))) {
mv.visitMethodInsn(INVOKESTATIC, "org/codehaus/groovy/runtime/DefaultGroovyMethods", "power", "(Ljava/math/BigDecimal;Ljava/lang/Integer;)Ljava/lang/Number;", false);
} else if (BigInteger_TYPE.equals(rType) && Integer_TYPE.equals(getWrapper(aType))) {
mv.visitMethodInsn(INVOKESTATIC, "org/codehaus/groovy/runtime/DefaultGroovyMethods", "power", "(Ljava/math/BigInteger;Ljava/lang/Integer;)Ljava/lang/Number;", false);
} else if (Long_TYPE.equals(getWrapper(rType)) && Integer_TYPE.equals(getWrapper(aType))) {
mv.visitMethodInsn(INVOKESTATIC, "org/codehaus/groovy/runtime/DefaultGroovyMethods", "power", "(Ljava/lang/Long;Ljava/lang/Integer;)Ljava/lang/Number;", false);
} else if (Integer_TYPE.equals(getWrapper(rType)) && Integer_TYPE.equals(getWrapper(aType))) {
mv.visitMethodInsn(INVOKESTATIC, "org/codehaus/groovy/runtime/DefaultGroovyMethods", "power", "(Ljava/lang/Integer;Ljava/lang/Integer;)Ljava/lang/Number;", false);
} else {
mv.visitMethodInsn(INVOKESTATIC, "org/codehaus/groovy/runtime/DefaultGroovyMethods", "power", "(Ljava/lang/Number;Ljava/lang/Number;)Ljava/lang/Number;", false);
}
controller.getOperandStack().replace(Number_TYPE, m2 - m1);
}
private void writeStringPlusCall(final Expression receiver, final String message, final Expression arguments) {
// todo: performance would be better if we created a StringBuilder
OperandStack operandStack = controller.getOperandStack();
int m1 = operandStack.getStackLength();
//slow Path
prepareSiteAndReceiver(receiver, message, false, controller.getCompileStack().isLHS());
visitBoxedArgument(arguments);
int m2 = operandStack.getStackLength();
MethodVisitor mv = controller.getMethodVisitor();
mv.visitMethodInsn(INVOKESTATIC, "org/codehaus/groovy/runtime/DefaultGroovyMethods", "plus", "(Ljava/lang/String;Ljava/lang/Object;)Ljava/lang/String;", false);
controller.getOperandStack().replace(STRING_TYPE, m2-m1);
}
private void writeNumberNumberCall(final Expression receiver, final String message, final Expression arguments) {
OperandStack operandStack = controller.getOperandStack();
int m1 = operandStack.getStackLength();
//slow Path
prepareSiteAndReceiver(receiver, message, false, controller.getCompileStack().isLHS());
controller.getOperandStack().doGroovyCast(Number_TYPE);
visitBoxedArgument(arguments);
controller.getOperandStack().doGroovyCast(Number_TYPE);
int m2 = operandStack.getStackLength();
MethodVisitor mv = controller.getMethodVisitor();
mv.visitMethodInsn(INVOKESTATIC, "org/codehaus/groovy/runtime/dgmimpl/NumberNumber" + MetaClassHelper.capitalize(message), message, "(Ljava/lang/Number;Ljava/lang/Number;)Ljava/lang/Number;", false);
controller.getOperandStack().replace(Number_TYPE, m2 - m1);
}
}