| /******************************************************************************* |
| * Copyright (c) 2000, 2009 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 |
| * $Id: CodeSnippetMessageSend.java 23405 2010-02-03 17:02:18Z stephan $ |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Fraunhofer FIRST - extended API and implementation |
| * Technical University Berlin - extended API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.eval; |
| |
| import org.eclipse.jdt.core.compiler.CharOperation; |
| import org.eclipse.jdt.internal.compiler.ast.ASTNode; |
| import org.eclipse.jdt.internal.compiler.ast.CastExpression; |
| import org.eclipse.jdt.internal.compiler.ast.Expression; |
| import org.eclipse.jdt.internal.compiler.ast.MessageSend; |
| import org.eclipse.jdt.internal.compiler.ast.NameReference; |
| 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.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.FieldBinding; |
| 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.ReferenceBinding; |
| import org.eclipse.jdt.internal.compiler.lookup.TypeBinding; |
| import org.eclipse.jdt.internal.compiler.lookup.TypeConstants; |
| import org.eclipse.jdt.internal.compiler.lookup.TypeIds; |
| import org.eclipse.jdt.internal.compiler.lookup.TypeVariableBinding; |
| import org.eclipse.objectteams.otdt.internal.core.compiler.lookup.AnchorMapping; |
| |
| public class CodeSnippetMessageSend extends MessageSend { |
| EvaluationContext evaluationContext; |
| FieldBinding delegateThis; |
| /** |
| * CodeSnippetMessageSend constructor comment. |
| */ |
| public CodeSnippetMessageSend(EvaluationContext evaluationContext) { |
| this.evaluationContext = evaluationContext; |
| } |
| /** |
| * MessageSend code generation |
| * |
| * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope |
| * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream |
| * @param valueRequired boolean |
| */ |
| public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) { |
| int pc = codeStream.position; |
| MethodBinding codegenBinding = this.binding.original(); |
| if (codegenBinding.canBeSeenBy(this.actualReceiverType, this, currentScope)) { |
| // generate receiver/enclosing instance access |
| boolean isStatic = codegenBinding.isStatic(); |
| // outer access ? |
| if (!isStatic && ((this.bits & DepthMASK) != 0)) { |
| // outer method can be reached through emulation |
| ReferenceBinding targetType = currentScope.enclosingSourceType().enclosingTypeAt((this.bits & DepthMASK) >> DepthSHIFT); |
| Object[] path = currentScope.getEmulationPath(targetType, true /*only exact match*/, false/*consider enclosing arg*/); |
| if (path == null) { |
| // emulation was not possible (should not happen per construction) |
| currentScope.problemReporter().needImplementation(this); |
| } else { |
| codeStream.generateOuterAccess(path, this, targetType, currentScope); |
| } |
| } else { |
| this.receiver.generateCode(currentScope, codeStream, !isStatic); |
| if ((this.bits & NeedReceiverGenericCast) != 0) { |
| codeStream.checkcast(this.actualReceiverType); |
| } |
| codeStream.recordPositionsFrom(pc, this.sourceStart); |
| } |
| // generate arguments |
| generateArguments(this.binding, this.arguments, currentScope, codeStream); |
| // actual message invocation |
| TypeBinding constantPoolDeclaringClass = CodeStream.getConstantPoolDeclaringClass(currentScope, codegenBinding, this.actualReceiverType, this.receiver.isImplicitThis()); |
| if (isStatic) { |
| codeStream.invoke(Opcodes.OPC_invokestatic, codegenBinding, constantPoolDeclaringClass); |
| } else if( (this.receiver.isSuper()) || codegenBinding.isPrivate()){ |
| codeStream.invoke(Opcodes.OPC_invokespecial, codegenBinding, constantPoolDeclaringClass); |
| } else { |
| if (constantPoolDeclaringClass.isInterface()) { // interface or annotation type |
| codeStream.invoke(Opcodes.OPC_invokeinterface, codegenBinding, constantPoolDeclaringClass); |
| } else { |
| codeStream.invoke(Opcodes.OPC_invokevirtual, codegenBinding, constantPoolDeclaringClass); |
| } |
| } |
| } else { |
| codeStream.generateEmulationForMethod(currentScope, codegenBinding); |
| // generate receiver/enclosing instance access |
| boolean isStatic = codegenBinding.isStatic(); |
| // outer access ? |
| if (!isStatic && ((this.bits & DepthMASK) != 0)) { |
| // not supported yet |
| currentScope.problemReporter().needImplementation(this); |
| } else { |
| this.receiver.generateCode(currentScope, codeStream, !isStatic); |
| if ((this.bits & NeedReceiverGenericCast) != 0) { |
| codeStream.checkcast(this.actualReceiverType); |
| } |
| codeStream.recordPositionsFrom(pc, this.sourceStart); |
| } |
| if (isStatic) { |
| // we need an object on the stack which is ignored for the method invocation |
| codeStream.aconst_null(); |
| } |
| // generate arguments |
| if (this.arguments != null) { |
| int argsLength = this.arguments.length; |
| codeStream.generateInlinedValue(argsLength); |
| codeStream.newArray(currentScope.createArrayType(currentScope.getType(TypeConstants.JAVA_LANG_OBJECT, 3), 1)); |
| codeStream.dup(); |
| for (int i = 0; i < argsLength; i++) { |
| codeStream.generateInlinedValue(i); |
| this.arguments[i].generateCode(currentScope, codeStream, true); |
| TypeBinding parameterBinding = codegenBinding.parameters[i]; |
| if (parameterBinding.isBaseType() && parameterBinding != TypeBinding.NULL) { |
| codeStream.generateBoxingConversion(codegenBinding.parameters[i].id); |
| } |
| codeStream.aastore(); |
| if (i < argsLength - 1) { |
| codeStream.dup(); |
| } |
| } |
| } else { |
| codeStream.generateInlinedValue(0); |
| codeStream.newArray(currentScope.createArrayType(currentScope.getType(TypeConstants.JAVA_LANG_OBJECT, 3), 1)); |
| } |
| codeStream.invokeJavaLangReflectMethodInvoke(); |
| |
| // convert the return value to the appropriate type for primitive types |
| if (codegenBinding.returnType.isBaseType()) { |
| int typeID = codegenBinding.returnType.id; |
| if (typeID == T_void) { |
| // remove the null from the stack |
| codeStream.pop(); |
| } |
| codeStream.checkcast(typeID); |
| codeStream.getBaseTypeValue(typeID); |
| } else { |
| codeStream.checkcast(codegenBinding.returnType); |
| } |
| } |
| // required cast must occur even if no value is required |
| if (this.valueCast != null) codeStream.checkcast(this.valueCast); |
| if (valueRequired){ |
| // implicit conversion if necessary |
| codeStream.generateImplicitConversion(this.implicitConversion); |
| } else { |
| boolean isUnboxing = (this.implicitConversion & TypeIds.UNBOXING) != 0; |
| // conversion only generated if unboxing |
| if (isUnboxing) codeStream.generateImplicitConversion(this.implicitConversion); |
| switch (isUnboxing ? postConversionType(currentScope).id : codegenBinding.returnType.id) { |
| case T_long : |
| case T_double : |
| codeStream.pop2(); |
| break; |
| case T_void : |
| break; |
| default : |
| codeStream.pop(); |
| } |
| } |
| codeStream.recordPositionsFrom(pc, (int)(this.nameSourcePosition >>> 32)); // highlight selector |
| } |
| public void manageSyntheticAccessIfNecessary(BlockScope currentScope, FlowInfo flowInfo) { |
| |
| if ((flowInfo.tagBits & FlowInfo.UNREACHABLE) == 0) { |
| // if method from parameterized type got found, use the original method at codegen time |
| MethodBinding codegenBinding = this.binding.original(); |
| if (codegenBinding != this.binding) { |
| // extra cast needed if method return type was type variable |
| if (codegenBinding.returnType.isTypeVariable()) { |
| TypeVariableBinding variableReturnType = (TypeVariableBinding) codegenBinding.returnType; |
| if (variableReturnType.firstBound != this.binding.returnType) { // no need for extra cast if same as first bound anyway |
| this.valueCast = this.binding.returnType; |
| } |
| } |
| } |
| } |
| } |
| public TypeBinding resolveType(BlockScope scope) { |
| // Answer the signature return type |
| // Base type promotion |
| |
| this.constant = Constant.NotAConstant; |
| boolean receiverCast = false, argsContainCast = false; |
| if (this.receiver instanceof CastExpression) { |
| this.receiver.bits |= DisableUnnecessaryCastCheck; // will check later on |
| receiverCast = true; |
| } |
| this.actualReceiverType = this.receiver.resolveType(scope); |
| if (receiverCast && this.actualReceiverType != null) { |
| // due to change of declaring class with receiver type, only identity cast should be notified |
| if (((CastExpression)this.receiver).expression.resolvedType == this.actualReceiverType) { |
| scope.problemReporter().unnecessaryCast((CastExpression)this.receiver); |
| } |
| } |
| // 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 null; |
| } |
| } |
| // will check for null after args are resolved |
| TypeBinding[] argumentTypes = Binding.NO_PARAMETERS; |
| if (this.arguments != null) { |
| boolean argHasError = false; // typeChecks all arguments |
| 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 |= DisableUnnecessaryCastCheck; // will check later on |
| argsContainCast = true; |
| } |
| if ((argumentTypes[i] = this.arguments[i].resolveType(scope)) == null) |
| argHasError = true; |
| } |
| if (argHasError) { |
| if(this.actualReceiverType instanceof ReferenceBinding) { |
| // record any selector match, for clients who may still need hint about possible method match |
| this.binding = scope.findMethod((ReferenceBinding)this.actualReceiverType, this.selector, new TypeBinding[]{}, this); |
| } |
| return null; |
| } |
| } |
| if (this.actualReceiverType == null) { |
| return null; |
| } |
| // base type cannot receive any message |
| if (this.actualReceiverType.isBaseType()) { |
| scope.problemReporter().errorNoMethodFor(this, this.actualReceiverType, argumentTypes); |
| return null; |
| } |
| |
| //{ObjectTeams: |
| AnchorMapping anchorMapping = null; |
| try { |
| anchorMapping = beforeMethodLookup(argumentTypes, scope); |
| //jwl} |
| |
| this.binding = |
| this.receiver.isImplicitThis() |
| ? scope.getImplicitMethod(this.selector, argumentTypes, this) |
| : scope.getMethod(this.actualReceiverType, this.selector, argumentTypes, this); |
| //{ObjectTeams: |
| } finally { |
| afterMethodLookup(scope, anchorMapping, argumentTypes, this.binding.returnType); |
| if (anchorMapping != null) |
| AnchorMapping.removeCurrentMapping(anchorMapping); |
| } |
| //jwl} |
| |
| if (!this.binding.isValidBinding()) { |
| if (this.binding instanceof ProblemMethodBinding |
| && ((ProblemMethodBinding) this.binding).problemId() == ProblemReasons.NotVisible) { |
| if (this.evaluationContext.declaringTypeName != null) { |
| this.delegateThis = scope.getField(scope.enclosingSourceType(), EvaluationConstants.DELEGATE_THIS, this); |
| if (this.delegateThis == null){ // if not found then internal error, field should have been found |
| this.constant = Constant.NotAConstant; |
| scope.problemReporter().invalidMethod(this, this.binding); |
| return null; |
| } |
| } else { |
| this.constant = Constant.NotAConstant; |
| scope.problemReporter().invalidMethod(this, this.binding); |
| return null; |
| } |
| CodeSnippetScope localScope = new CodeSnippetScope(scope); |
| //{ObjectTeams: |
| AnchorMapping privateAnchorMapping = null; |
| MethodBinding privateBinding = null; |
| try { |
| privateAnchorMapping = beforeMethodLookup(argumentTypes, localScope); |
| // jwl} |
| privateBinding = |
| this.receiver instanceof CodeSnippetThisReference && ((CodeSnippetThisReference) this.receiver).isImplicit |
| ? localScope.getImplicitMethod((ReferenceBinding)this.delegateThis.type, this.selector, argumentTypes, this) |
| : localScope.getMethod(this.delegateThis.type, this.selector, argumentTypes, this); |
| //{ObjectTeams: |
| } finally { |
| afterMethodLookup(localScope, privateAnchorMapping, argumentTypes, this.binding.returnType); |
| } |
| // jwl} |
| |
| if (!privateBinding.isValidBinding()) { |
| if (this.binding.declaringClass == null) { |
| if (this.actualReceiverType instanceof ReferenceBinding) { |
| this.binding.declaringClass = (ReferenceBinding) this.actualReceiverType; |
| } else { // really bad error .... |
| scope.problemReporter().errorNoMethodFor(this, this.actualReceiverType, argumentTypes); |
| return null; |
| } |
| } |
| scope.problemReporter().invalidMethod(this, this.binding); |
| return null; |
| } else { |
| this.binding = privateBinding; |
| } |
| } else { |
| if (this.binding.declaringClass == null) { |
| if (this.actualReceiverType instanceof ReferenceBinding) { |
| this.binding.declaringClass = (ReferenceBinding) this.actualReceiverType; |
| } else { // really bad error .... |
| scope.problemReporter().errorNoMethodFor(this, this.actualReceiverType, argumentTypes); |
| return null; |
| } |
| } |
| scope.problemReporter().invalidMethod(this, this.binding); |
| return null; |
| } |
| } |
| if (!this.binding.isStatic()) { |
| // the "receiver" must not be a type, in other words, a NameReference that the TC has bound to a Type |
| if (this.receiver instanceof NameReference |
| && (((NameReference) this.receiver).bits & Binding.TYPE) != 0) { |
| scope.problemReporter().mustUseAStaticMethod(this, this.binding); |
| } else { |
| // handle indirect inheritance thru variable secondary bound |
| // receiver may receive generic cast, as part of implicit conversion |
| TypeBinding oldReceiverType = this.actualReceiverType; |
| this.actualReceiverType = this.actualReceiverType.getErasureCompatibleType(this.binding.declaringClass); |
| this.receiver.computeConversion(scope, this.actualReceiverType, this.actualReceiverType); |
| if (this.actualReceiverType != oldReceiverType && this.receiver.postConversionType(scope) != this.actualReceiverType) { // record need for explicit cast at codegen since receiver could not handle it |
| this.bits |= NeedReceiverGenericCast; |
| } |
| } |
| } |
| if (checkInvocationArguments(scope, this.receiver, this.actualReceiverType, this.binding, this.arguments, argumentTypes, argsContainCast, this)) { |
| this.bits |= ASTNode.Unchecked; |
| } |
| |
| //-------message send that are known to fail at compile time----------- |
| if (this.binding.isAbstract()) { |
| if (this.receiver.isSuper()) { |
| scope.problemReporter().cannotDireclyInvokeAbstractMethod(this, this.binding); |
| } |
| // abstract private methods cannot occur nor abstract static............ |
| } |
| if (isMethodUseDeprecated(this.binding, scope, true)) |
| scope.problemReporter().deprecatedMethod(this.binding, this); |
| |
| // from 1.5 compliance on, array#clone() returns the array type (but binding still shows Object) |
| if (this.actualReceiverType.isArrayType() |
| && this.binding.parameters == Binding.NO_PARAMETERS |
| && scope.compilerOptions().complianceLevel >= ClassFileConstants.JDK1_5 |
| && CharOperation.equals(this.binding.selector, CLONE)) { |
| this.resolvedType = this.actualReceiverType; |
| } else { |
| TypeBinding returnType = this.binding.returnType; |
| |
| if (returnType != null) { |
| if ((this.bits & ASTNode.Unchecked) != 0 && this.genericTypeArguments == null) { |
| returnType = scope.environment().convertToRawType(returnType.erasure(), true); |
| } |
| returnType = returnType.capture(scope, this.sourceEnd); |
| } |
| this.resolvedType = returnType; |
| } |
| return this.resolvedType; |
| } |
| } |