/*******************************************************************************
* Copyright (c) 2000, 2010 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.compiler.ast;
import org.eclipse.jdt.internal.compiler.ASTVisitor;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.codegen.CodeStream;
import org.eclipse.jdt.internal.compiler.codegen.Opcodes;
import org.eclipse.jdt.internal.compiler.flow.FlowContext;
import org.eclipse.jdt.internal.compiler.flow.FlowInfo;
import org.eclipse.jdt.internal.compiler.impl.Constant;
import org.eclipse.jdt.internal.compiler.lookup.Binding;
import org.eclipse.jdt.internal.compiler.lookup.BlockScope;
import org.eclipse.jdt.internal.compiler.lookup.ExtraCompilerModifiers;
import org.eclipse.jdt.internal.compiler.lookup.LocalTypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.MethodBinding;
import org.eclipse.jdt.internal.compiler.lookup.ProblemMethodBinding;
import org.eclipse.jdt.internal.compiler.lookup.ProblemReasons;
import org.eclipse.jdt.internal.compiler.lookup.ProblemReferenceBinding;
import org.eclipse.jdt.internal.compiler.lookup.RawTypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding;
import org.eclipse.jdt.internal.compiler.lookup.TagBits;
import org.eclipse.jdt.internal.compiler.lookup.TypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.TypeConstants;
import org.eclipse.jdt.internal.compiler.lookup.TypeIds;
/**
* Variation on allocation, where can optionally be specified any of: - leading enclosing instance -
* trailing anonymous type - generic type arguments for generic constructor invocation
*/
public class QualifiedAllocationExpression extends AllocationExpression {
//qualification may be on both side
public Expression enclosingInstance;
public TypeDeclaration anonymousType;
public QualifiedAllocationExpression() {
// for subtypes
}
public QualifiedAllocationExpression(TypeDeclaration anonymousType) {
this.anonymousType= anonymousType;
anonymousType.allocation= this;
}
public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) {
// analyse the enclosing instance
if (this.enclosingInstance != null) {
flowInfo= this.enclosingInstance.analyseCode(currentScope, flowContext, flowInfo);
}
// check captured variables are initialized in current context (26134)
checkCapturedLocalInitializationIfNecessary(
(ReferenceBinding)(this.anonymousType == null
? this.binding.declaringClass.erasure()
: this.binding.declaringClass.superclass().erasure()),
currentScope,
flowInfo);
// process arguments
if (this.arguments != null) {
for (int i= 0, count= this.arguments.length; i < count; i++) {
flowInfo= this.arguments[i].analyseCode(currentScope, flowContext, flowInfo);
}
}
// analyse the anonymous nested type
if (this.anonymousType != null) {
flowInfo= this.anonymousType.analyseCode(currentScope, flowContext, flowInfo);
}
// record some dependency information for exception types
ReferenceBinding[] thrownExceptions;
if (((thrownExceptions= this.binding.thrownExceptions).length) != 0) {
if ((this.bits & ASTNode.Unchecked) != 0 && this.genericTypeArguments == null) {
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=277643, align with javac on JLS 15.12.2.6
thrownExceptions= currentScope.environment().convertToRawTypes(this.binding.thrownExceptions, true, true);
}
// check exception handling
flowContext.checkExceptionHandlers(
thrownExceptions,
this,
flowInfo.unconditionalCopy(),
currentScope);
}
manageEnclosingInstanceAccessIfNecessary(currentScope, flowInfo);
manageSyntheticAccessIfNecessary(currentScope, flowInfo);
return flowInfo;
}
public Expression enclosingInstance() {
return this.enclosingInstance;
}
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
if (!valueRequired)
currentScope.problemReporter().unusedObjectAllocation(this);
int pc= codeStream.position;
MethodBinding codegenBinding= this.binding.original();
ReferenceBinding allocatedType= codegenBinding.declaringClass;
codeStream.new_(allocatedType);
boolean isUnboxing= (this.implicitConversion & TypeIds.UNBOXING) != 0;
if (valueRequired || isUnboxing) {
codeStream.dup();
}
// better highlight for allocation: display the type individually
if (this.type != null) { // null for enum constant body
codeStream.recordPositionsFrom(pc, this.type.sourceStart);
} else {
// push enum constant name and ordinal
codeStream.ldc(String.valueOf(this.enumConstant.name));
codeStream.generateInlinedValue(this.enumConstant.binding.id);
}
// handling innerclass instance allocation - enclosing instance arguments
if (allocatedType.isNestedType()) {
codeStream.generateSyntheticEnclosingInstanceValues(
currentScope,
allocatedType,
enclosingInstance(),
this);
}
// generate the arguments for constructor
generateArguments(this.binding, this.arguments, currentScope, codeStream);
// handling innerclass instance allocation - outer local arguments
if (allocatedType.isNestedType()) {
codeStream.generateSyntheticOuterArgumentValues(
currentScope,
allocatedType,
this);
}
// invoke constructor
if (this.syntheticAccessor == null) {
codeStream.invoke(Opcodes.OPC_invokespecial, codegenBinding, null /* default declaringClass */);
} else {
// synthetic accessor got some extra arguments appended to its signature, which need values
for (int i= 0, max= this.syntheticAccessor.parameters.length - codegenBinding.parameters.length; i < max; i++) {
codeStream.aconst_null();
}
codeStream.invoke(Opcodes.OPC_invokespecial, this.syntheticAccessor, null /* default declaringClass */);
}
if (valueRequired) {
codeStream.generateImplicitConversion(this.implicitConversion);
} else if (isUnboxing) {
// conversion only generated if unboxing
codeStream.generateImplicitConversion(this.implicitConversion);
switch (postConversionType(currentScope).id) {
case T_long:
case T_double:
codeStream.pop2();
break;
default:
codeStream.pop();
}
}
codeStream.recordPositionsFrom(pc, this.sourceStart);
if (this.anonymousType != null) {
this.anonymousType.generateCode(currentScope, codeStream);
}
}
public boolean isSuperAccess() {
// necessary to lookup super constructor of anonymous type
return this.anonymousType != null;
}
/* Inner emulation consists in either recording a dependency
* link only, or performing one level of propagation.
*
* Dependency mechanism is used whenever dealing with source target
* types, since by the time we reach them, we might not yet know their
* exact need.
*/
public void manageEnclosingInstanceAccessIfNecessary(BlockScope currentScope, FlowInfo flowInfo) {
if ((flowInfo.tagBits & FlowInfo.UNREACHABLE) == 0) {
ReferenceBinding allocatedTypeErasure= (ReferenceBinding)this.binding.declaringClass.erasure();
// perform some extra emulation work in case there is some and we are inside a local type only
if (allocatedTypeErasure.isNestedType()
&& currentScope.enclosingSourceType().isLocalType()) {
if (allocatedTypeErasure.isLocalType()) {
((LocalTypeBinding)allocatedTypeErasure).addInnerEmulationDependent(currentScope, this.enclosingInstance != null);
} else {
// locally propagate, since we already now the desired shape for sure
currentScope.propagateInnerEmulation(allocatedTypeErasure, this.enclosingInstance != null);
}
}
}
}
public StringBuffer printExpression(int indent, StringBuffer output) {
if (this.enclosingInstance != null)
this.enclosingInstance.printExpression(0, output).append('.');
super.printExpression(0, output);
if (this.anonymousType != null) {
this.anonymousType.print(indent, output);
}
return output;
}
public TypeBinding resolveType(BlockScope scope) {
// added for code assist...cannot occur with 'normal' code
if (this.anonymousType == null && this.enclosingInstance == null) {
return super.resolveType(scope);
}
// Propagate the type checking to the arguments, and checks if the constructor is defined.
// ClassInstanceCreationExpression ::= Primary '.' 'new' SimpleName '(' ArgumentListopt ')' ClassBodyopt
// ClassInstanceCreationExpression ::= Name '.' 'new' SimpleName '(' ArgumentListopt ')' ClassBodyopt
this.constant= Constant.NotAConstant;
TypeBinding enclosingInstanceType= null;
TypeBinding receiverType= null;
boolean hasError= false;
boolean enclosingInstanceContainsCast= false;
boolean argsContainCast= false;
if (this.enclosingInstance != null) {
if (this.enclosingInstance instanceof CastExpression) {
this.enclosingInstance.bits|= ASTNode.DisableUnnecessaryCastCheck; // will check later on
enclosingInstanceContainsCast= true;
}
if ((enclosingInstanceType= this.enclosingInstance.resolveType(scope)) == null) {
hasError= true;
} else if (enclosingInstanceType.isBaseType() || enclosingInstanceType.isArrayType()) {
scope.problemReporter().illegalPrimitiveOrArrayTypeForEnclosingInstance(
enclosingInstanceType,
this.enclosingInstance);
hasError= true;
} else if (this.type instanceof QualifiedTypeReference) {
scope.problemReporter().illegalUsageOfQualifiedTypeReference((QualifiedTypeReference)this.type);
hasError= true;
} else {
receiverType= ((SingleTypeReference)this.type).resolveTypeEnclosing(scope, (ReferenceBinding)enclosingInstanceType);
if (receiverType != null && enclosingInstanceContainsCast) {
CastExpression.checkNeedForEnclosingInstanceCast(scope, this.enclosingInstance, enclosingInstanceType, receiverType);
}
}
} else {
if (this.type == null) {
// initialization of an enum constant
receiverType= scope.enclosingSourceType();
} else {
receiverType= this.type.resolveType(scope, true /* check bounds*/);
checkParameterizedAllocation: {
if (receiverType == null || !receiverType.isValidBinding())
break checkParameterizedAllocation;
if (this.type instanceof ParameterizedQualifiedTypeReference) { // disallow new X<String>.Y<Integer>()
ReferenceBinding currentType= (ReferenceBinding)receiverType;
do {
// isStatic() is answering true for toplevel types
if ((currentType.modifiers & ClassFileConstants.AccStatic) != 0)
break checkParameterizedAllocation;
if (currentType.isRawType())
break checkParameterizedAllocation;
} while ((currentType= currentType.enclosingType()) != null);
ParameterizedQualifiedTypeReference qRef= (ParameterizedQualifiedTypeReference)this.type;
for (int i= qRef.typeArguments.length - 2; i >= 0; i--) {
if (qRef.typeArguments[i] != null) {
scope.problemReporter().illegalQualifiedParameterizedTypeAllocation(this.type, receiverType);
break;
}
}
}
}
}
}
if (receiverType == null || !receiverType.isValidBinding()) {
hasError= true;
}
// resolve type arguments (for generic constructor call)
if (this.typeArguments != null) {
int length= this.typeArguments.length;
boolean argHasError= scope.compilerOptions().sourceLevel < ClassFileConstants.JDK1_5;
this.genericTypeArguments= new TypeBinding[length];
for (int i= 0; i < length; i++) {
TypeReference typeReference= this.typeArguments[i];
if ((this.genericTypeArguments[i]= typeReference.resolveType(scope, true /* check bounds*/)) == null) {
argHasError= true;
}
if (argHasError && typeReference instanceof Wildcard) {
scope.problemReporter().illegalUsageOfWildcard(typeReference);
}
}
if (argHasError) {
if (this.arguments != null) { // still attempt to resolve arguments
for (int i= 0, max= this.arguments.length; i < max; i++) {
this.arguments[i].resolveType(scope);
}
}
return null;
}
}
// will check for null after args are resolved
TypeBinding[] argumentTypes= Binding.NO_PARAMETERS;
if (this.arguments != null) {
int length= this.arguments.length;
argumentTypes= new TypeBinding[length];
for (int i= 0; i < length; i++) {
Expression argument= this.arguments[i];
if (argument instanceof CastExpression) {
argument.bits|= ASTNode.DisableUnnecessaryCastCheck; // will check later on
argsContainCast= true;
}
if ((argumentTypes[i]= argument.resolveType(scope)) == null) {
hasError= true;
}
}
}
// limit of fault-tolerance
if (hasError) {
if (receiverType instanceof ReferenceBinding) {
ReferenceBinding referenceReceiver= (ReferenceBinding)receiverType;
if (receiverType.isValidBinding()) {
// record a best guess, for clients who need hint about possible contructor match
int length= this.arguments == null ? 0 : this.arguments.length;
TypeBinding[] pseudoArgs= new TypeBinding[length];
for (int i= length; --i >= 0;) {
pseudoArgs[i]= argumentTypes[i] == null ? TypeBinding.NULL : argumentTypes[i]; // replace args with errors with null type
}
this.binding= scope.findMethod(referenceReceiver, TypeConstants.INIT, pseudoArgs, this);
if (this.binding != null && !this.binding.isValidBinding()) {
MethodBinding closestMatch= ((ProblemMethodBinding)this.binding).closestMatch;
// record the closest match, for clients who may still need hint about possible method match
if (closestMatch != null) {
if (closestMatch.original().typeVariables != Binding.NO_TYPE_VARIABLES) { // generic method
// shouldn't return generic method outside its context, rather convert it to raw method (175409)
closestMatch= scope.environment().createParameterizedGenericMethod(closestMatch.original(), (RawTypeBinding)null);
}
this.binding= closestMatch;
MethodBinding closestMatchOriginal= closestMatch.original();
if (closestMatchOriginal.isOrEnclosedByPrivateType() && !scope.isDefinedInMethod(closestMatchOriginal)) {
// ignore cases where method is used from within inside itself (e.g. direct recursions)
closestMatchOriginal.modifiers|= ExtraCompilerModifiers.AccLocallyUsed;
}
}
}
}
if (this.anonymousType != null) {
// insert anonymous type in scope (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=210070)
scope.addAnonymousType(this.anonymousType, referenceReceiver);
this.anonymousType.resolve(scope);
return this.resolvedType= this.anonymousType.binding;
}
}
return this.resolvedType= receiverType;
}
if (this.anonymousType == null) {
// qualified allocation with no anonymous type
if (!receiverType.canBeInstantiated()) {
scope.problemReporter().cannotInstantiate(this.type, receiverType);
return this.resolvedType= receiverType;
}
ReferenceBinding allocationType= (ReferenceBinding)receiverType;
if ((this.binding= scope.getConstructor(allocationType, argumentTypes, this)).isValidBinding()) {
if (isMethodUseDeprecated(this.binding, scope, true)) {
scope.problemReporter().deprecatedMethod(this.binding, this);
}
if (checkInvocationArguments(scope, null, allocationType, this.binding, this.arguments, argumentTypes, argsContainCast, this)) {
this.bits|= ASTNode.Unchecked;
}
if (this.typeArguments != null && this.binding.original().typeVariables == Binding.NO_TYPE_VARIABLES) {
scope.problemReporter().unnecessaryTypeArgumentsForMethodInvocation(this.binding, this.genericTypeArguments, this.typeArguments);
}
} else {
if (this.binding.declaringClass == null) {
this.binding.declaringClass= allocationType;
}
if (this.type != null && !this.type.resolvedType.isValidBinding()) {
// problem already got signaled on type reference, do not report secondary problem
return null;
}
scope.problemReporter().invalidConstructor(this, this.binding);
return this.resolvedType= receiverType;
}
if ((this.binding.tagBits & TagBits.HasMissingType) != 0) {
scope.problemReporter().missingTypeInConstructor(this, this.binding);
}
// The enclosing instance must be compatible with the innermost enclosing type
ReferenceBinding expectedType= this.binding.declaringClass.enclosingType();
if (expectedType != enclosingInstanceType) // must call before computeConversion() and typeMismatchError()
scope.compilationUnitScope().recordTypeConversion(expectedType, enclosingInstanceType);
if (enclosingInstanceType.isCompatibleWith(expectedType) || scope.isBoxingCompatibleWith(enclosingInstanceType, expectedType)) {
this.enclosingInstance.computeConversion(scope, expectedType, enclosingInstanceType);
return this.resolvedType= receiverType;
}
scope.problemReporter().typeMismatchError(enclosingInstanceType, expectedType, this.enclosingInstance, null);
return this.resolvedType= receiverType;
}
ReferenceBinding superType= (ReferenceBinding)receiverType;
if (superType.isTypeVariable()) {
superType= new ProblemReferenceBinding(new char[][] { superType.sourceName() }, superType, ProblemReasons.IllegalSuperTypeVariable);
scope.problemReporter().invalidType(this, superType);
return null;
} else if (this.type != null && superType.isEnum()) { // tolerate enum constant body
scope.problemReporter().cannotInstantiate(this.type, superType);
return this.resolvedType= superType;
}
// anonymous type scenario
// an anonymous class inherits from java.lang.Object when declared "after" an interface
ReferenceBinding anonymousSuperclass= superType.isInterface() ? scope.getJavaLangObject() : superType;
// insert anonymous type in scope
scope.addAnonymousType(this.anonymousType, superType);
this.anonymousType.resolve(scope);
// find anonymous super constructor
this.resolvedType= this.anonymousType.binding; // 1.2 change
if ((this.resolvedType.tagBits & TagBits.HierarchyHasProblems) != 0) {
return null; // stop secondary errors
}
MethodBinding inheritedBinding= scope.getConstructor(anonymousSuperclass, argumentTypes, this);
if (!inheritedBinding.isValidBinding()) {
if (inheritedBinding.declaringClass == null) {
inheritedBinding.declaringClass= anonymousSuperclass;
}
if (this.type != null && !this.type.resolvedType.isValidBinding()) {
// problem already got signaled on type reference, do not report secondary problem
return null;
}
scope.problemReporter().invalidConstructor(this, inheritedBinding);
return this.resolvedType;
}
if ((inheritedBinding.tagBits & TagBits.HasMissingType) != 0) {
scope.problemReporter().missingTypeInConstructor(this, inheritedBinding);
}
if (this.enclosingInstance != null) {
ReferenceBinding targetEnclosing= inheritedBinding.declaringClass.enclosingType();
if (targetEnclosing == null) {
scope.problemReporter().unnecessaryEnclosingInstanceSpecification(this.enclosingInstance, superType);
return this.resolvedType;
} else if (!enclosingInstanceType.isCompatibleWith(targetEnclosing) && !scope.isBoxingCompatibleWith(enclosingInstanceType, targetEnclosing)) {
scope.problemReporter().typeMismatchError(enclosingInstanceType, targetEnclosing, this.enclosingInstance, null);
return this.resolvedType;
}
this.enclosingInstance.computeConversion(scope, targetEnclosing, enclosingInstanceType);
}
if (this.arguments != null) {
if (checkInvocationArguments(scope, null, anonymousSuperclass, inheritedBinding, this.arguments, argumentTypes, argsContainCast, this)) {
this.bits|= ASTNode.Unchecked;
}
}
if (this.typeArguments != null && inheritedBinding.original().typeVariables == Binding.NO_TYPE_VARIABLES) {
scope.problemReporter().unnecessaryTypeArgumentsForMethodInvocation(inheritedBinding, this.genericTypeArguments, this.typeArguments);
}
// Update the anonymous inner class : superclass, interface
this.binding= this.anonymousType.createDefaultConstructorWithBinding(inheritedBinding, (this.bits & ASTNode.Unchecked) != 0 && this.genericTypeArguments == null);
return this.resolvedType;
}
public void traverse(ASTVisitor visitor, BlockScope scope) {
if (visitor.visit(this, scope)) {
if (this.enclosingInstance != null)
this.enclosingInstance.traverse(visitor, scope);
if (this.typeArguments != null) {
for (int i= 0, typeArgumentsLength= this.typeArguments.length; i < typeArgumentsLength; i++) {
this.typeArguments[i].traverse(visitor, scope);
}
}
if (this.type != null) // case of enum constant
this.type.traverse(visitor, scope);
if (this.arguments != null) {
int argumentsLength= this.arguments.length;
for (int i= 0; i < argumentsLength; i++)
this.arguments[i].traverse(visitor, scope);
}
if (this.anonymousType != null)
this.anonymousType.traverse(visitor, scope);
}
visitor.endVisit(this, scope);
}
}