| /******************************************************************************* |
| * Copyright (c) 2000, 2013 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 |
| * Stephan Herrmann - Contributions for |
| * bug 186342 - [compiler][null] Using annotations for null checking |
| * bug 365519 - editorial cleanup after bug 186342 and bug 365387 |
| *******************************************************************************/ |
| package org.aspectj.org.eclipse.jdt.internal.compiler.ast; |
| |
| import org.aspectj.org.eclipse.jdt.internal.compiler.ASTVisitor; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.impl.Constant; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.Binding; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.BlockScope; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.ClassScope; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.ElementValuePair; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.FieldBinding; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.LocalVariableBinding; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.MethodBinding; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.TypeBinding; |
| |
| /** |
| * MemberValuePair node |
| */ |
| public class MemberValuePair extends ASTNode { |
| |
| public char[] name; |
| public Expression value; |
| public MethodBinding binding; |
| /** |
| * The representation of this pair in the type system. |
| */ |
| public ElementValuePair compilerElementPair = null; |
| |
| public MemberValuePair(char[] token, int sourceStart, int sourceEnd, Expression value) { |
| this.name = token; |
| this.sourceStart = sourceStart; |
| this.sourceEnd = sourceEnd; |
| this.value = value; |
| if (value instanceof ArrayInitializer) { |
| value.bits |= IsAnnotationDefaultValue; |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.aspectj.org.eclipse.jdt.internal.compiler.ast.ASTNode#print(int, java.lang.StringBuffer) |
| */ |
| public StringBuffer print(int indent, StringBuffer output) { |
| output |
| .append(this.name) |
| .append(" = "); //$NON-NLS-1$ |
| this.value.print(0, output); |
| return output; |
| } |
| |
| public void resolveTypeExpecting(BlockScope scope, TypeBinding requiredType) { |
| |
| if (this.value == null) { |
| this.compilerElementPair = new ElementValuePair(this.name, this.value, this.binding); |
| return; |
| } |
| if (requiredType == null) { |
| // fault tolerance: keep resolving |
| if (this.value instanceof ArrayInitializer) { |
| this.value.resolveTypeExpecting(scope, null); |
| } else { |
| this.value.resolveType(scope); |
| } |
| this.compilerElementPair = new ElementValuePair(this.name, this.value, this.binding); |
| return; |
| } |
| |
| this.value.setExpectedType(requiredType); // needed in case of generic method invocation - looks suspect, generic method invocation here ??? |
| TypeBinding valueType; |
| if (this.value instanceof ArrayInitializer) { |
| ArrayInitializer initializer = (ArrayInitializer) this.value; |
| valueType = initializer.resolveTypeExpecting(scope, this.binding.returnType); |
| } else if (this.value instanceof ArrayAllocationExpression) { |
| scope.problemReporter().annotationValueMustBeArrayInitializer(this.binding.declaringClass, this.name, this.value); |
| this.value.resolveType(scope); |
| valueType = null; // no need to pursue |
| } else { |
| valueType = this.value.resolveType(scope); |
| // https://bugs.eclipse.org/bugs/show_bug.cgi?id=248897 |
| ASTVisitor visitor = new ASTVisitor() { |
| public boolean visit(SingleNameReference reference, BlockScope scop) { |
| if (reference.binding instanceof LocalVariableBinding) { |
| ((LocalVariableBinding) reference.binding).useFlag = LocalVariableBinding.USED; |
| } |
| return true; |
| } |
| }; |
| this.value.traverse(visitor, scope); |
| } |
| this.compilerElementPair = new ElementValuePair(this.name, this.value, this.binding); |
| if (valueType == null) |
| return; |
| |
| TypeBinding leafType = requiredType.leafComponentType(); |
| if (!(this.value.isConstantValueOfTypeAssignableToType(valueType, requiredType) |
| || valueType.isCompatibleWith(requiredType))) { |
| |
| if (!(requiredType.isArrayType() |
| && requiredType.dimensions() == 1 |
| && (this.value.isConstantValueOfTypeAssignableToType(valueType, leafType) |
| || valueType.isCompatibleWith(leafType)))) { |
| |
| if (leafType.isAnnotationType() && !valueType.isAnnotationType()) { |
| scope.problemReporter().annotationValueMustBeAnnotation(this.binding.declaringClass, this.name, this.value, leafType); |
| } else { |
| scope.problemReporter().typeMismatchError(valueType, requiredType, this.value, null); |
| } |
| return; // may allow to proceed to find more errors at once |
| } |
| } else { |
| scope.compilationUnitScope().recordTypeConversion(requiredType.leafComponentType(), valueType.leafComponentType()); |
| this.value.computeConversion(scope, requiredType, valueType); |
| } |
| |
| // annotation methods can only return base types, String, Class, enum type, annotation types and arrays of these |
| checkAnnotationMethodType: { |
| switch (leafType.erasure().id) { |
| case T_byte : |
| case T_short : |
| case T_char : |
| case T_int : |
| case T_long : |
| case T_float : |
| case T_double : |
| case T_boolean : |
| case T_JavaLangString : |
| if (this.value instanceof ArrayInitializer) { |
| ArrayInitializer initializer = (ArrayInitializer) this.value; |
| final Expression[] expressions = initializer.expressions; |
| if (expressions != null) { |
| for (int i =0, max = expressions.length; i < max; i++) { |
| Expression expression = expressions[i]; |
| if (expression.resolvedType == null) continue; // fault-tolerance |
| if (expression.constant == Constant.NotAConstant) { |
| scope.problemReporter().annotationValueMustBeConstant(this.binding.declaringClass, this.name, expressions[i], false); |
| } |
| } |
| } |
| } else if (this.value.constant == Constant.NotAConstant) { |
| if (valueType.isArrayType()) { |
| scope.problemReporter().annotationValueMustBeArrayInitializer(this.binding.declaringClass, this.name, this.value); |
| } else { |
| scope.problemReporter().annotationValueMustBeConstant(this.binding.declaringClass, this.name, this.value, false); |
| } |
| } |
| break checkAnnotationMethodType; |
| case T_JavaLangClass : |
| if (this.value instanceof ArrayInitializer) { |
| ArrayInitializer initializer = (ArrayInitializer) this.value; |
| final Expression[] expressions = initializer.expressions; |
| if (expressions != null) { |
| for (int i =0, max = expressions.length; i < max; i++) { |
| Expression currentExpression = expressions[i]; |
| if (!(currentExpression instanceof ClassLiteralAccess)) { |
| scope.problemReporter().annotationValueMustBeClassLiteral(this.binding.declaringClass, this.name, currentExpression); |
| } |
| } |
| } |
| } else if (!(this.value instanceof ClassLiteralAccess)) { |
| scope.problemReporter().annotationValueMustBeClassLiteral(this.binding.declaringClass, this.name, this.value); |
| } |
| break checkAnnotationMethodType; |
| } |
| if (leafType.isEnum()) { |
| if (this.value instanceof NullLiteral) { |
| scope.problemReporter().annotationValueMustBeConstant(this.binding.declaringClass, this.name, this.value, true); |
| } else if (this.value instanceof ArrayInitializer) { |
| ArrayInitializer initializer = (ArrayInitializer) this.value; |
| final Expression[] expressions = initializer.expressions; |
| if (expressions != null) { |
| for (int i =0, max = expressions.length; i < max; i++) { |
| Expression currentExpression = expressions[i]; |
| if (currentExpression instanceof NullLiteral) { |
| scope.problemReporter().annotationValueMustBeConstant(this.binding.declaringClass, this.name, currentExpression, true); |
| } else if (currentExpression instanceof NameReference) { |
| NameReference nameReference = (NameReference) currentExpression; |
| final Binding nameReferenceBinding = nameReference.binding; |
| if (nameReferenceBinding.kind() == Binding.FIELD) { |
| FieldBinding fieldBinding = (FieldBinding) nameReferenceBinding; |
| if (!fieldBinding.declaringClass.isEnum()) { |
| scope.problemReporter().annotationValueMustBeConstant(this.binding.declaringClass, this.name, currentExpression, true); |
| } |
| } |
| } |
| } |
| } |
| } else if (this.value instanceof NameReference) { |
| NameReference nameReference = (NameReference) this.value; |
| final Binding nameReferenceBinding = nameReference.binding; |
| if (nameReferenceBinding.kind() == Binding.FIELD) { |
| FieldBinding fieldBinding = (FieldBinding) nameReferenceBinding; |
| if (!fieldBinding.declaringClass.isEnum()) { |
| if (!fieldBinding.type.isArrayType()) { |
| scope.problemReporter().annotationValueMustBeConstant(this.binding.declaringClass, this.name, this.value, true); |
| } else { |
| scope.problemReporter().annotationValueMustBeArrayInitializer(this.binding.declaringClass, this.name, this.value); |
| } |
| } |
| } |
| } else { |
| scope.problemReporter().annotationValueMustBeConstant(this.binding.declaringClass, this.name, this.value, true); |
| } |
| break checkAnnotationMethodType; |
| } |
| if (leafType.isAnnotationType()) { |
| if (!valueType.leafComponentType().isAnnotationType()) { // check annotation type and also reject null literal |
| scope.problemReporter().annotationValueMustBeAnnotation(this.binding.declaringClass, this.name, this.value, leafType); |
| } else if (this.value instanceof ArrayInitializer) { |
| ArrayInitializer initializer = (ArrayInitializer) this.value; |
| final Expression[] expressions = initializer.expressions; |
| if (expressions != null) { |
| for (int i =0, max = expressions.length; i < max; i++) { |
| Expression currentExpression = expressions[i]; |
| if (currentExpression instanceof NullLiteral || !(currentExpression instanceof Annotation)) { |
| scope.problemReporter().annotationValueMustBeAnnotation(this.binding.declaringClass, this.name, currentExpression, leafType); |
| } |
| } |
| } |
| } else if (!(this.value instanceof Annotation)) { |
| scope.problemReporter().annotationValueMustBeAnnotation(this.binding.declaringClass, this.name, this.value, leafType); |
| } |
| break checkAnnotationMethodType; |
| } |
| } |
| } |
| |
| public void traverse(ASTVisitor visitor, BlockScope scope) { |
| if (visitor.visit(this, scope)) { |
| if (this.value != null) { |
| this.value.traverse(visitor, scope); |
| } |
| } |
| visitor.endVisit(this, scope); |
| } |
| public void traverse(ASTVisitor visitor, ClassScope scope) { |
| if (visitor.visit(this, scope)) { |
| if (this.value != null) { |
| this.value.traverse(visitor, scope); |
| } |
| } |
| visitor.endVisit(this, scope); |
| } |
| } |