| /******************************************************************************* |
| * Copyright (c) 2000, 2004 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.codegen.*; |
| import org.eclipse.jdt.internal.compiler.flow.*; |
| import org.eclipse.jdt.internal.compiler.lookup.*; |
| |
| public class ExplicitConstructorCall extends Statement implements InvocationSite { |
| |
| public Expression[] arguments; |
| public Expression qualification; |
| public MethodBinding binding; // exact binding resulting from lookup |
| protected MethodBinding codegenBinding; // actual binding used for code generation (if no synthetic accessor) |
| MethodBinding syntheticAccessor; // synthetic accessor for inner-emulation |
| public int accessMode; |
| public TypeReference[] typeArguments; |
| public TypeBinding[] genericTypeArguments; |
| |
| public final static int ImplicitSuper = 1; |
| public final static int Super = 2; |
| public final static int This = 3; |
| |
| public VariableBinding[][] implicitArguments; |
| boolean discardEnclosingInstance; |
| |
| // TODO Remove once DOMParser is activated |
| public int typeArgumentsSourceStart; |
| |
| public ExplicitConstructorCall(int accessMode) { |
| this.accessMode = accessMode; |
| } |
| |
| public FlowInfo analyseCode( |
| BlockScope currentScope, |
| FlowContext flowContext, |
| FlowInfo flowInfo) { |
| |
| // must verify that exceptions potentially thrown by this expression are caught in the method. |
| |
| try { |
| ((MethodScope) currentScope).isConstructorCall = true; |
| |
| // process enclosing instance |
| if (qualification != null) { |
| flowInfo = |
| qualification |
| .analyseCode(currentScope, flowContext, flowInfo) |
| .unconditionalInits(); |
| } |
| // process arguments |
| if (arguments != null) { |
| for (int i = 0, max = arguments.length; i < max; i++) { |
| flowInfo = |
| arguments[i] |
| .analyseCode(currentScope, flowContext, flowInfo) |
| .unconditionalInits(); |
| } |
| } |
| |
| ReferenceBinding[] thrownExceptions; |
| if ((thrownExceptions = binding.thrownExceptions) != NoExceptions) { |
| // check exceptions |
| flowContext.checkExceptionHandlers( |
| thrownExceptions, |
| (accessMode == ImplicitSuper) |
| ? (ASTNode) currentScope.methodScope().referenceContext |
| : (ASTNode) this, |
| flowInfo, |
| currentScope); |
| } |
| manageEnclosingInstanceAccessIfNecessary(currentScope, flowInfo); |
| manageSyntheticAccessIfNecessary(currentScope, flowInfo); |
| return flowInfo; |
| } finally { |
| ((MethodScope) currentScope).isConstructorCall = false; |
| } |
| } |
| |
| /** |
| * Constructor call code generation |
| * |
| * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope |
| * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream |
| */ |
| public void generateCode(BlockScope currentScope, CodeStream codeStream) { |
| |
| if ((bits & IsReachableMASK) == 0) { |
| return; |
| } |
| try { |
| ((MethodScope) currentScope).isConstructorCall = true; |
| |
| int pc = codeStream.position; |
| codeStream.aload_0(); |
| |
| ReferenceBinding targetType = this.codegenBinding.declaringClass; |
| |
| // special name&ordinal argument generation for enum constructors |
| if (targetType.erasure().id == T_JavaLangEnum || targetType.isEnum()) { |
| codeStream.aload_1(); // pass along name param as name arg |
| codeStream.iload_2(); // pass along ordinal param as ordinal arg |
| } |
| // handling innerclass constructor invocation |
| // handling innerclass instance allocation - enclosing instance arguments |
| if (targetType.isNestedType()) { |
| codeStream.generateSyntheticEnclosingInstanceValues( |
| currentScope, |
| targetType, |
| discardEnclosingInstance ? null : qualification, |
| this); |
| } |
| // generate arguments |
| generateArguments(binding, arguments, currentScope, codeStream); |
| |
| // handling innerclass instance allocation - outer local arguments |
| if (targetType.isNestedType()) { |
| codeStream.generateSyntheticOuterArgumentValues( |
| currentScope, |
| targetType, |
| this); |
| } |
| if (syntheticAccessor != null) { |
| // synthetic accessor got some extra arguments appended to its signature, which need values |
| for (int i = 0, |
| max = syntheticAccessor.parameters.length - this.codegenBinding.parameters.length; |
| i < max; |
| i++) { |
| codeStream.aconst_null(); |
| } |
| codeStream.invokespecial(syntheticAccessor); |
| } else { |
| codeStream.invokespecial(this.codegenBinding); |
| } |
| codeStream.recordPositionsFrom(pc, this.sourceStart); |
| } finally { |
| ((MethodScope) currentScope).isConstructorCall = false; |
| } |
| } |
| /** |
| * @see org.eclipse.jdt.internal.compiler.lookup.InvocationSite#genericTypeArguments() |
| */ |
| public TypeBinding[] genericTypeArguments() { |
| return this.genericTypeArguments; |
| } |
| public boolean isImplicitSuper() { |
| //return true if I'm of these compiler added statement super(); |
| |
| return (accessMode == ImplicitSuper); |
| } |
| |
| public boolean isSuperAccess() { |
| |
| return accessMode != This; |
| } |
| |
| public boolean isTypeAccess() { |
| |
| return true; |
| } |
| |
| /* 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. |
| */ |
| void manageEnclosingInstanceAccessIfNecessary(BlockScope currentScope, FlowInfo flowInfo) { |
| ReferenceBinding superTypeErasure = (ReferenceBinding) binding.declaringClass.erasure(); |
| |
| if (!flowInfo.isReachable()) return; |
| // perform some emulation work in case there is some and we are inside a local type only |
| if (superTypeErasure.isNestedType() |
| && currentScope.enclosingSourceType().isLocalType()) { |
| |
| if (superTypeErasure.isLocalType()) { |
| ((LocalTypeBinding) superTypeErasure).addInnerEmulationDependent(currentScope, qualification != null); |
| } else { |
| // locally propagate, since we already now the desired shape for sure |
| currentScope.propagateInnerEmulation(superTypeErasure, qualification != null); |
| } |
| } |
| } |
| |
| public void manageSyntheticAccessIfNecessary(BlockScope currentScope, FlowInfo flowInfo) { |
| |
| if (!flowInfo.isReachable()) return; |
| // if constructor from parameterized type got found, use the original constructor at codegen time |
| this.codegenBinding = this.binding.original(); |
| |
| // perform some emulation work in case there is some and we are inside a local type only |
| if (binding.isPrivate() && accessMode != This) { |
| |
| if (currentScope.environment().options.isPrivateConstructorAccessChangingVisibility) { |
| this.codegenBinding.tagForClearingPrivateModifier(); |
| // constructor will not be dumped as private, no emulation required thus |
| } else { |
| syntheticAccessor = |
| ((SourceTypeBinding) this.codegenBinding.declaringClass).addSyntheticMethod(this.codegenBinding, isSuperAccess()); |
| currentScope.problemReporter().needToEmulateMethodAccess(this.codegenBinding, this); |
| } |
| } |
| } |
| |
| public StringBuffer printStatement(int indent, StringBuffer output) { |
| |
| printIndent(indent, output); |
| if (qualification != null) qualification.printExpression(0, output).append('.'); |
| if (typeArguments != null) { |
| output.append('<');//$NON-NLS-1$ |
| int max = typeArguments.length - 1; |
| for (int j = 0; j < max; j++) { |
| typeArguments[j].print(0, output); |
| output.append(", ");//$NON-NLS-1$ |
| } |
| typeArguments[max].print(0, output); |
| output.append('>'); |
| } |
| if (accessMode == This) { |
| output.append("this("); //$NON-NLS-1$ |
| } else { |
| output.append("super("); //$NON-NLS-1$ |
| } |
| if (arguments != null) { |
| for (int i = 0; i < arguments.length; i++) { |
| if (i > 0) output.append(", "); //$NON-NLS-1$ |
| arguments[i].printExpression(0, output); |
| } |
| } |
| return output.append(");"); //$NON-NLS-1$ |
| } |
| |
| public void resolve(BlockScope scope) { |
| // the return type should be void for a constructor. |
| // the test is made into getConstructor |
| |
| // mark the fact that we are in a constructor call..... |
| // unmark at all returns |
| MethodScope methodScope = scope.methodScope(); |
| try { |
| AbstractMethodDeclaration methodDeclaration = methodScope.referenceMethod(); |
| if (methodDeclaration == null |
| || !methodDeclaration.isConstructor() |
| || ((ConstructorDeclaration) methodDeclaration).constructorCall != this) { |
| scope.problemReporter().invalidExplicitConstructorCall(this); |
| return; |
| } |
| methodScope.isConstructorCall = true; |
| ReferenceBinding receiverType = scope.enclosingSourceType(); |
| if (accessMode != This) |
| receiverType = receiverType.superclass(); |
| |
| if (receiverType == null) { |
| return; |
| } |
| // prevent (explicit) super constructor invocation from within enum |
| if (this.accessMode == Super && receiverType.erasure().id == T_JavaLangEnum) { |
| scope.problemReporter().cannotInvokeSuperConstructorInEnum(this, methodScope.referenceMethod().binding); |
| } |
| // qualification should be from the type of the enclosingType |
| if (qualification != null) { |
| if (accessMode != Super) { |
| scope.problemReporter().unnecessaryEnclosingInstanceSpecification( |
| qualification, |
| receiverType); |
| } |
| ReferenceBinding enclosingType = receiverType.enclosingType(); |
| if (enclosingType == null) { |
| scope.problemReporter().unnecessaryEnclosingInstanceSpecification( |
| qualification, |
| receiverType); |
| discardEnclosingInstance = true; |
| } else { |
| TypeBinding qTb = qualification.resolveTypeExpecting(scope, enclosingType); |
| qualification.computeConversion(scope, qTb, qTb); |
| } |
| } |
| // resolve type arguments (for generic constructor call) |
| if (this.typeArguments != null) { |
| int length = this.typeArguments.length; |
| boolean argHasError = false; // typeChecks all arguments |
| this.genericTypeArguments = new TypeBinding[length]; |
| for (int i = 0; i < length; i++) { |
| if ((this.genericTypeArguments[i] = this.typeArguments[i].resolveType(scope, true /* check bounds*/)) == null) { |
| argHasError = true; |
| } |
| } |
| if (argHasError) { |
| return; |
| } |
| } |
| |
| // arguments buffering for the method lookup |
| TypeBinding[] argumentTypes = NoParameters; |
| boolean argsContainCast = false; |
| if (arguments != null) { |
| boolean argHasError = false; // typeChecks all arguments |
| int length = arguments.length; |
| argumentTypes = new TypeBinding[length]; |
| for (int i = 0; i < length; i++) { |
| Expression argument = this.arguments[i]; |
| if (argument instanceof CastExpression) { |
| argument.bits |= IgnoreNeedForCastCheckMASK; // will check later on |
| argsContainCast = true; |
| } |
| if ((argumentTypes[i] = argument.resolveType(scope)) == null) { |
| argHasError = true; |
| } |
| } |
| if (argHasError) { |
| return; |
| } |
| } else if (receiverType.erasure().id == T_JavaLangEnum) { |
| // TODO (philippe) get rid of once well-known binding is available |
| argumentTypes = new TypeBinding[] { scope.getJavaLangString(), BaseTypes.IntBinding }; |
| } |
| if ((binding = scope.getConstructor(receiverType, argumentTypes, this)).isValidBinding()) { |
| if (isMethodUseDeprecated(binding, scope)) |
| scope.problemReporter().deprecatedMethod(binding, this); |
| checkInvocationArguments(scope, null, receiverType, binding, this.arguments, argumentTypes, argsContainCast, this); |
| if (binding.isPrivate()) { |
| binding.original().modifiers |= AccPrivateUsed; |
| } |
| } else { |
| if (binding.declaringClass == null) |
| binding.declaringClass = receiverType; |
| scope.problemReporter().invalidConstructor(this, binding); |
| } |
| } finally { |
| methodScope.isConstructorCall = false; |
| } |
| } |
| |
| public void setActualReceiverType(ReferenceBinding receiverType) { |
| // ignored |
| } |
| |
| public void setDepth(int depth) { |
| // ignore for here |
| } |
| |
| public void setFieldIndex(int depth) { |
| // ignore for here |
| } |
| |
| public void traverse(ASTVisitor visitor, BlockScope scope) { |
| |
| if (visitor.visit(this, scope)) { |
| if (this.qualification != null) { |
| this.qualification.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.arguments != null) { |
| for (int i = 0, argumentLength = this.arguments.length; i < argumentLength; i++) |
| this.arguments[i].traverse(visitor, scope); |
| } |
| } |
| visitor.endVisit(this, scope); |
| } |
| } |