src/org/eclipse/jdt/internal/compiler/ast/AnnotationMethodDeclaration.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2004 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package org.eclipse.jdt.internal.compiler.ast;
  12
  13 import org.eclipse.jdt.internal.compiler.ASTVisitor;
  14 import org.eclipse.jdt.internal.compiler.ClassFile;
  15 import org.eclipse.jdt.internal.compiler.CompilationResult;
  16 import org.eclipse.jdt.internal.compiler.lookup.ClassScope;
  17 import org.eclipse.jdt.internal.compiler.lookup.TypeBinding;
  18 import org.eclipse.jdt.internal.compiler.parser.Parser;
  19
  20 public class AnnotationMethodDeclaration extends MethodDeclaration {
  21
  22         public Expression defaultValue;
  23         public int extendedDimensions;
  24
  25         /**
  26          * MethodDeclaration constructor comment.
  27          */
  28         public AnnotationMethodDeclaration(CompilationResult compilationResult) {
  29                 super(compilationResult);
  30         }
  31
  32         public void generateCode(ClassFile classFile) {
  33                 classFile.generateMethodInfoHeader(this.binding);
  34                 int methodAttributeOffset = classFile.contentsOffset;
  35                 int attributeNumber = classFile.generateMethodInfoAttribute(this.binding, this);
  36                 classFile.completeMethodInfo(methodAttributeOffset, attributeNumber);
  37         }
  38
  39         public boolean isAnnotationMethod() {
  40
  41                 return true;
  42         }
  43
  44         public boolean isMethod() {
  45
  46                 return false;
  47         }
  48
  49         public void parseStatements(Parser parser, CompilationUnitDeclaration unit) {
  50                 // nothing to do
  51                 // annotation type member declaration don't have any body
  52         }
  53
  54         public StringBuffer print(int tab, StringBuffer output) {
  55
  56                 printIndent(tab, output);
  57                 printModifiers(this.modifiers, output);
  58                 if (this.annotations != null) printAnnotations(this.annotations, output);
  59
  60                 TypeParameter[] typeParams = typeParameters();
  61                 if (typeParams != null) {
  62                         output.append('<');//$NON-NLS-1$
  63                         int max = typeParams.length - 1;
  64                         for (int j = 0; j < max; j++) {
  65                                 typeParams[j].print(0, output);
  66                                 output.append(", ");//$NON-NLS-1$
  67                         }
  68                         typeParams[max].print(0, output);
  69                         output.append('>');
  70                 }
  71
  72                 printReturnType(0, output).append(this.selector).append('(');
  73                 if (this.arguments != null) {
  74                         for (int i = 0; i < this.arguments.length; i++) {
  75                                 if (i > 0) output.append(", "); //$NON-NLS-1$
  76                                 this.arguments[i].print(0, output);
  77                         }
  78                 }
  79                 output.append(')');
  80                 if (this.thrownExceptions != null) {
  81                         output.append(" throws "); //$NON-NLS-1$
  82                         for (int i = 0; i < this.thrownExceptions.length; i++) {
  83                                 if (i > 0) output.append(", "); //$NON-NLS-1$
  84                                 this.thrownExceptions[i].print(0, output);
  85                         }
  86                 }
  87
  88                 if (this.defaultValue != null) {
  89                         output.append(" default "); //$NON-NLS-1$
  90                         this.defaultValue.print(0, output);
  91                 }
  92
  93                 printBody(tab + 1, output);
  94                 return output;
  95         }
  96
  97         public void resolveStatements() {
  98
  99                 super.resolveStatements();
 100                 if (this.arguments != null) {
 101                         scope.problemReporter().annotationMembersCannotHaveParameters(this);
 102                 }
 103                 if (this.typeParameters != null) {
 104                         scope.problemReporter().annotationMembersCannotHaveTypeParameters(this);
 105                 }
 106                 if (this.extendedDimensions != 0) {
 107                         scope.problemReporter().illegalExtendedDimensions(this);
 108                 }
 109                 if (this.binding == null) return;
 110                 TypeBinding returnTypeBinding = this.binding.returnType;
 111                 if (returnTypeBinding != null) {
 112
 113                         // annotation methods can only return base types, String, Class, enum type, annotation types and arrays of these
 114                         checkAnnotationMethodType: {
 115                                 TypeBinding leafReturnType = returnTypeBinding.leafComponentType();
 116
 117                                 switch (leafReturnType.erasure().id) {
 118                                         case T_byte :
 119                                         case T_short :
 120                                         case T_char :
 121                                         case T_int :
 122                                         case T_long :
 123                                         case T_float :
 124                                         case T_double :
 125                                         case T_boolean :
 126                                         case T_JavaLangString :
 127                                         case T_JavaLangClass :
 128                                                 if (returnTypeBinding.dimensions() <= 1) // only 1-dimensional array permitted
 129                                                         break checkAnnotationMethodType;
 130                                 }
 131                                 if (leafReturnType.isEnum()) {
 132                                         if (returnTypeBinding.dimensions() <= 1) // only 1-dimensional array permitted
 133                                                 break checkAnnotationMethodType;
 134                                 }
 135                                 if (leafReturnType.isAnnotationType()) {
 136                                         scope.classScope().detectAnnotationCycle(scope.enclosingSourceType(), leafReturnType, this.returnType);
 137                                         if (returnTypeBinding.dimensions() <= 1) // only 1-dimensional array permitted
 138                                                 break checkAnnotationMethodType;
 139                                 }
 140                                 scope.problemReporter().invalidAnnotationMemberType(this);
 141                         }
 142                         if (this.defaultValue != null) {
 143                                 MemberValuePair pair = new MemberValuePair(this.selector, this.sourceStart, this.sourceEnd, this.defaultValue);
 144                                 pair.binding = this.binding;
 145                                 pair.resolveTypeExpecting(scope, returnTypeBinding);
 146                         }
 147                 }
 148         }
 149
 150         public void traverse(
 151                 ASTVisitor visitor,
 152                 ClassScope classScope) {
 153
 154                 if (visitor.visit(this, classScope)) {
 155                         if (this.annotations != null) {
 156                                 int annotationsLength = this.annotations.length;
 157                                 for (int i = 0; i < annotationsLength; i++)
 158                                         this.annotations[i].traverse(visitor, scope);
 159                         }
 160                         if (this.returnType != null) {
 161                                 this.returnType.traverse(visitor, scope);
 162                         }
 163                         if (this.defaultValue != null) {
 164                                 this.defaultValue.traverse(visitor, scope);
 165                         }
 166                 }
 167                 visitor.endVisit(this, classScope);
 168         }
 169 }