| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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.eval; |
| |
| 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.flow.FlowInfo; |
| import org.eclipse.jdt.internal.compiler.impl.CompilerOptions; |
| 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.TypeVariableBinding; |
| |
| public class CodeSnippetMessageSend extends MessageSend implements ProblemReasons, EvaluationConstants { |
| 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; |
| |
| if (this.codegenBinding.canBeSeenBy(this.actualReceiverType, this, currentScope)) { |
| // generate receiver/enclosing instance access |
| boolean isStatic = this.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(); |
| } else { |
| codeStream.generateOuterAccess(path, this, targetType, currentScope); |
| } |
| } else { |
| this.receiver.generateCode(currentScope, codeStream, !isStatic); |
| } |
| // generate arguments |
| if (this.arguments != null) { |
| for (int i = 0, max = this.arguments.length; i < max; i++) { |
| this.arguments[i].generateCode(currentScope, codeStream, true); |
| } |
| } |
| // actual message invocation |
| if (isStatic) { |
| codeStream.invokestatic(this.codegenBinding); |
| } else { |
| if (this.receiver.isSuper()) { |
| codeStream.invokespecial(this.codegenBinding); |
| } else { |
| if (this.codegenBinding.declaringClass.isInterface()) { |
| codeStream.invokeinterface(this.codegenBinding); |
| } else { |
| codeStream.invokevirtual(this.codegenBinding); |
| } |
| } |
| } |
| } else { |
| ((CodeSnippetCodeStream) codeStream).generateEmulationForMethod(currentScope, this.codegenBinding); |
| // generate receiver/enclosing instance access |
| boolean isStatic = this.codegenBinding.isStatic(); |
| // outer access ? |
| if (!isStatic && ((this.bits & DepthMASK) != 0)) { |
| // not supported yet |
| currentScope.problemReporter().needImplementation(); |
| } else { |
| this.receiver.generateCode(currentScope, codeStream, !isStatic); |
| } |
| 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 = this.codegenBinding.parameters[i]; |
| if (parameterBinding.isBaseType() && parameterBinding != NullBinding) { |
| ((CodeSnippetCodeStream)codeStream).generateObjectWrapperForType(this.codegenBinding.parameters[i]); |
| } |
| codeStream.aastore(); |
| if (i < argsLength - 1) { |
| codeStream.dup(); |
| } |
| } |
| } else { |
| codeStream.generateInlinedValue(0); |
| codeStream.newArray(currentScope.createArrayType(currentScope.getType(TypeConstants.JAVA_LANG_OBJECT, 3), 1)); |
| } |
| ((CodeSnippetCodeStream) codeStream).invokeJavaLangReflectMethodInvoke(); |
| |
| // convert the return value to the appropriate type for primitive types |
| if (this.codegenBinding.returnType.isBaseType()) { |
| int typeID = this.codegenBinding.returnType.id; |
| if (typeID == T_void) { |
| // remove the null from the stack |
| codeStream.pop(); |
| } |
| ((CodeSnippetCodeStream) codeStream).checkcast(typeID); |
| ((CodeSnippetCodeStream) codeStream).getBaseTypeValue(typeID); |
| } else { |
| codeStream.checkcast(this.codegenBinding.returnType); |
| } |
| } |
| // operation on the returned value |
| if (valueRequired) { |
| // implicit conversion if necessary |
| codeStream.generateImplicitConversion(this.implicitConversion); |
| } else { |
| // pop return value if any |
| switch (this.codegenBinding.returnType.id) { |
| case T_long : |
| case T_double : |
| codeStream.pop2(); |
| break; |
| case T_void : |
| break; |
| default : |
| codeStream.pop(); |
| } |
| } |
| // TODO (philippe) need to revise codegen to include genericCast |
| codeStream.recordPositionsFrom(pc, this.sourceStart); |
| } |
| public void manageSyntheticAccessIfNecessary(BlockScope currentScope, FlowInfo flowInfo) { |
| |
| if (!flowInfo.isReachable()) return; |
| |
| // if method from parameterized type got found, use the original method at codegen time |
| this.codegenBinding = this.binding.original(); |
| if (this.codegenBinding != this.binding) { |
| // extra cast needed if method return type was type variable |
| if (this.codegenBinding.returnType.isTypeVariable()) { |
| TypeVariableBinding variableReturnType = (TypeVariableBinding) this.codegenBinding.returnType; |
| if (variableReturnType.firstBound != this.binding.returnType) { // no need for extra cast if same as first bound anyway |
| this.valueCast = this.binding.returnType; |
| } |
| } |
| } |
| |
| // if the binding declaring class is not visible, need special action |
| // for runtime compatibility on 1.2 VMs : change the declaring class of the binding |
| // NOTE: from target 1.2 on, method's declaring class is touched if any different from receiver type |
| // and not from Object or implicit static method call. |
| if (this.binding.declaringClass != this.actualReceiverType |
| && !this.actualReceiverType.isArrayType()) { |
| CompilerOptions options = currentScope.environment().options; |
| if ((options.targetJDK >= ClassFileConstants.JDK1_2 |
| && (options.complianceLevel >= ClassFileConstants.JDK1_4 || !receiver.isImplicitThis() || !this.codegenBinding.isStatic()) |
| && this.binding.declaringClass.id != T_JavaLangObject) // no change for Object methods |
| || !this.binding.declaringClass.canBeSeenBy(currentScope)) { |
| |
| this.codegenBinding = currentScope.enclosingSourceType().getUpdatedMethodBinding( |
| this.codegenBinding, (ReferenceBinding) this.actualReceiverType.erasure()); |
| } |
| // Post 1.4.0 target, array clone() invocations are qualified with array type |
| // This is handled in array type #clone method binding resolution (see Scope and UpdatedMethodBinding) |
| } |
| } |
| public TypeBinding resolveType(BlockScope scope) { |
| // Answer the signature return type |
| // Base type promotion |
| |
| this.constant = NotAConstant; |
| this.actualReceiverType = this.receiver.resolveType(scope); |
| // will check for null after args are resolved |
| TypeBinding[] argumentTypes = NoParameters; |
| 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++) |
| if ((argumentTypes[i] = this.arguments[i].resolveType(scope)) == null) |
| argHasError = true; |
| if (argHasError) |
| 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; |
| } |
| |
| this.binding = |
| this.receiver.isImplicitThis() |
| ? scope.getImplicitMethod(this.selector, argumentTypes, this) |
| : scope.getMethod(this.actualReceiverType, this.selector, argumentTypes, this); |
| if (!this.binding.isValidBinding()) { |
| if (this.binding instanceof ProblemMethodBinding |
| && ((ProblemMethodBinding) this.binding).problemId() == NotVisible) { |
| if (this.evaluationContext.declaringTypeName != null) { |
| this.delegateThis = scope.getField(scope.enclosingSourceType(), DELEGATE_THIS, this); |
| if (this.delegateThis == null){ // if not found then internal error, field should have been found |
| this.constant = NotAConstant; |
| scope.problemReporter().invalidMethod(this, this.binding); |
| return null; |
| } |
| } else { |
| this.constant = NotAConstant; |
| scope.problemReporter().invalidMethod(this, this.binding); |
| return null; |
| } |
| CodeSnippetScope localScope = new CodeSnippetScope(scope); |
| MethodBinding 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); |
| 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) { |
| if ((((NameReference) this.receiver).bits & Binding.TYPE) != 0) { |
| scope.problemReporter().mustUseAStaticMethod(this, this.binding); |
| return null; |
| } |
| } |
| } |
| if (this.arguments != null) |
| for (int i = 0; i < this.arguments.length; i++) |
| this.arguments[i].computeConversion(scope, this.binding.parameters[i], argumentTypes[i]); |
| |
| //-------message send that are known to fail at compile time----------- |
| if (this.binding.isAbstract()) { |
| if (this.receiver.isSuper()) { |
| scope.problemReporter().cannotDireclyInvokeAbstractMethod(this, this.binding); |
| return null; |
| } |
| // abstract private methods cannot occur nor abstract static............ |
| } |
| if (isMethodUseDeprecated(this.binding, scope)) |
| scope.problemReporter().deprecatedMethod(this.binding, this); |
| |
| return this.resolvedType = this.binding.returnType; |
| } |
| } |
