| /******************************************************************************* |
| * Copyright (c) 2000, 2011 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.flow.FlowContext; |
| import org.eclipse.jdt.internal.compiler.flow.FlowInfo; |
| import org.eclipse.jdt.internal.compiler.impl.CompilerOptions; |
| import org.eclipse.jdt.internal.compiler.impl.Constant; |
| import org.eclipse.jdt.internal.compiler.lookup.ArrayBinding; |
| import org.eclipse.jdt.internal.compiler.lookup.BlockScope; |
| import org.eclipse.jdt.internal.compiler.lookup.ClassScope; |
| import org.eclipse.jdt.internal.compiler.lookup.ProblemReasons; |
| import org.eclipse.jdt.internal.compiler.lookup.ProblemReferenceBinding; |
| import org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding; |
| import org.eclipse.jdt.internal.compiler.lookup.Scope; |
| import org.eclipse.jdt.internal.compiler.lookup.TagBits; |
| import org.eclipse.jdt.internal.compiler.lookup.TypeBinding; |
| import org.eclipse.jdt.internal.compiler.lookup.TypeIds; |
| import org.eclipse.jdt.internal.compiler.problem.ProblemSeverities; |
| |
| public abstract class TypeReference extends Expression { |
| |
| public static final TypeReference[] NO_TYPE_ARGUMENTS = new TypeReference[0]; |
| /* |
| * Answer a base type reference (can be an array of base type). |
| */ |
| public static final TypeReference baseTypeReference(int baseType, int dim) { |
| |
| if (dim == 0) { |
| switch (baseType) { |
| case (TypeIds.T_void) : |
| return new SingleTypeReference(TypeBinding.VOID.simpleName, 0); |
| case (TypeIds.T_boolean) : |
| return new SingleTypeReference(TypeBinding.BOOLEAN.simpleName, 0); |
| case (TypeIds.T_char) : |
| return new SingleTypeReference(TypeBinding.CHAR.simpleName, 0); |
| case (TypeIds.T_float) : |
| return new SingleTypeReference(TypeBinding.FLOAT.simpleName, 0); |
| case (TypeIds.T_double) : |
| return new SingleTypeReference(TypeBinding.DOUBLE.simpleName, 0); |
| case (TypeIds.T_byte) : |
| return new SingleTypeReference(TypeBinding.BYTE.simpleName, 0); |
| case (TypeIds.T_short) : |
| return new SingleTypeReference(TypeBinding.SHORT.simpleName, 0); |
| case (TypeIds.T_int) : |
| return new SingleTypeReference(TypeBinding.INT.simpleName, 0); |
| default : //T_long |
| return new SingleTypeReference(TypeBinding.LONG.simpleName, 0); |
| } |
| } |
| switch (baseType) { |
| case (TypeIds.T_void) : |
| return new ArrayTypeReference(TypeBinding.VOID.simpleName, dim, 0); |
| case (TypeIds.T_boolean) : |
| return new ArrayTypeReference(TypeBinding.BOOLEAN.simpleName, dim, 0); |
| case (TypeIds.T_char) : |
| return new ArrayTypeReference(TypeBinding.CHAR.simpleName, dim, 0); |
| case (TypeIds.T_float) : |
| return new ArrayTypeReference(TypeBinding.FLOAT.simpleName, dim, 0); |
| case (TypeIds.T_double) : |
| return new ArrayTypeReference(TypeBinding.DOUBLE.simpleName, dim, 0); |
| case (TypeIds.T_byte) : |
| return new ArrayTypeReference(TypeBinding.BYTE.simpleName, dim, 0); |
| case (TypeIds.T_short) : |
| return new ArrayTypeReference(TypeBinding.SHORT.simpleName, dim, 0); |
| case (TypeIds.T_int) : |
| return new ArrayTypeReference(TypeBinding.INT.simpleName, dim, 0); |
| default : //T_long |
| return new ArrayTypeReference(TypeBinding.LONG.simpleName, dim, 0); |
| } |
| } |
| |
| // allows us to trap completion & selection nodes |
| public void aboutToResolve(Scope scope) { |
| // default implementation: do nothing |
| } |
| public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) { |
| return flowInfo; |
| } |
| public void checkBounds(Scope scope) { |
| // only parameterized type references have bounds |
| } |
| public abstract TypeReference copyDims(int dim); |
| public int dimensions() { |
| return 0; |
| } |
| |
| public abstract char[] getLastToken(); |
| |
| /** |
| * @return char[][] |
| * TODO (jerome) should merge back into #getTypeName() |
| */ |
| public char [][] getParameterizedTypeName(){ |
| return getTypeName(); |
| } |
| protected abstract TypeBinding getTypeBinding(Scope scope); |
| /** |
| * @return char[][] |
| */ |
| public abstract char [][] getTypeName() ; |
| |
| protected TypeBinding internalResolveType(Scope scope) { |
| // handle the error here |
| this.constant = Constant.NotAConstant; |
| if (this.resolvedType != null) { // is a shared type reference which was already resolved |
| if (this.resolvedType.isValidBinding()) { |
| return this.resolvedType; |
| } else { |
| switch (this.resolvedType.problemId()) { |
| case ProblemReasons.NotFound : |
| case ProblemReasons.NotVisible : |
| case ProblemReasons.InheritedNameHidesEnclosingName : |
| TypeBinding type = this.resolvedType.closestMatch(); |
| if (type == null) return null; |
| return scope.environment().convertToRawType(type, false /*do not force conversion of enclosing types*/); |
| default : |
| return null; |
| } |
| } |
| } |
| boolean hasError; |
| TypeBinding type = this.resolvedType = getTypeBinding(scope); |
| if (type == null) { |
| return null; // detected cycle while resolving hierarchy |
| } else if ((hasError = !type.isValidBinding()) == true) { |
| reportInvalidType(scope); |
| switch (type.problemId()) { |
| case ProblemReasons.NotFound : |
| case ProblemReasons.NotVisible : |
| case ProblemReasons.InheritedNameHidesEnclosingName : |
| type = type.closestMatch(); |
| if (type == null) return null; |
| break; |
| default : |
| return null; |
| } |
| } |
| if (type.isArrayType() && ((ArrayBinding) type).leafComponentType == TypeBinding.VOID) { |
| scope.problemReporter().cannotAllocateVoidArray(this); |
| return null; |
| } |
| if (!(this instanceof QualifiedTypeReference) // QualifiedTypeReference#getTypeBinding called above will have already checked deprecation |
| && isTypeUseDeprecated(type, scope)) { |
| reportDeprecatedType(type, scope); |
| } |
| type = scope.environment().convertToRawType(type, false /*do not force conversion of enclosing types*/); |
| if (type.leafComponentType().isRawType() |
| && (this.bits & ASTNode.IgnoreRawTypeCheck) == 0 |
| && scope.compilerOptions().getSeverity(CompilerOptions.RawTypeReference) != ProblemSeverities.Ignore) { |
| scope.problemReporter().rawTypeReference(this, type); |
| } |
| if (hasError) { |
| // do not store the computed type, keep the problem type instead |
| return type; |
| } |
| return this.resolvedType = type; |
| } |
| public boolean isTypeReference() { |
| return true; |
| } |
| |
| protected void reportDeprecatedType(TypeBinding type, Scope scope, int index) { |
| scope.problemReporter().deprecatedType(type, this, index); |
| } |
| |
| protected void reportDeprecatedType(TypeBinding type, Scope scope) { |
| scope.problemReporter().deprecatedType(type, this, Integer.MAX_VALUE); |
| } |
| |
| protected void reportInvalidType(Scope scope) { |
| scope.problemReporter().invalidType(this, this.resolvedType); |
| } |
| |
| public TypeBinding resolveSuperType(ClassScope scope) { |
| // assumes the implementation of resolveType(ClassScope) will call back to detect cycles |
| TypeBinding superType = resolveType(scope); |
| if (superType == null) return null; |
| |
| if (superType.isTypeVariable()) { |
| if (this.resolvedType.isValidBinding()) { |
| this.resolvedType = new ProblemReferenceBinding(getTypeName(), (ReferenceBinding)this.resolvedType, ProblemReasons.IllegalSuperTypeVariable); |
| reportInvalidType(scope); |
| } |
| return null; |
| } |
| return superType; |
| } |
| |
| public final TypeBinding resolveType(BlockScope blockScope) { |
| return resolveType(blockScope, true /* checkbounds if any */); |
| } |
| |
| public TypeBinding resolveType(BlockScope scope, boolean checkBounds) { |
| return internalResolveType(scope); |
| } |
| |
| public TypeBinding resolveType(ClassScope scope) { |
| return internalResolveType(scope); |
| } |
| |
| public TypeBinding resolveTypeArgument(BlockScope blockScope, ReferenceBinding genericType, int rank) { |
| return resolveType(blockScope, true /* check bounds*/); |
| } |
| |
| public TypeBinding resolveTypeArgument(ClassScope classScope, ReferenceBinding genericType, int rank) { |
| // https://bugs.eclipse.org/bugs/show_bug.cgi?id=294057, circularity is allowed when we are |
| // resolving type arguments i.e interface A<T extends C> {} interface B extends A<D> {} |
| // interface D extends C {} interface C extends B {} |
| ReferenceBinding ref = classScope.referenceContext.binding; |
| boolean pauseHierarchyCheck = false; |
| try { |
| if (ref.isHierarchyBeingConnected()) { |
| ref.tagBits |= TagBits.PauseHierarchyCheck; |
| pauseHierarchyCheck = true; |
| } |
| return resolveType(classScope); |
| } finally { |
| if (pauseHierarchyCheck) { |
| ref.tagBits &= ~TagBits.PauseHierarchyCheck; |
| } |
| } |
| } |
| |
| public abstract void traverse(ASTVisitor visitor, BlockScope scope); |
| |
| public abstract void traverse(ASTVisitor visitor, ClassScope scope); |
| } |