java/java-impl/src/com/intellij/psi/filters/AnnotationParameterFilter.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.intellij.psi.filters;
  17
  18 import com.intellij.psi.PsiAnnotation;
  19 import com.intellij.psi.PsiAnnotationParameterList;
  20 import com.intellij.psi.PsiElement;
  21 import com.intellij.psi.PsiNameValuePair;
  22 import com.intellij.util.ReflectionCache;
  23 import org.jetbrains.annotations.NonNls;
  24
  25 /**
  26  * @author peter
  27  */
  28 public class AnnotationParameterFilter implements ElementFilter{
  29   private final Class<? extends PsiElement> myClass;
  30   @NonNls private final String myParameterName;
  31   private final String myAnnotationQualifiedName;
  32
  33
  34   public AnnotationParameterFilter(final Class<? extends PsiElement> elementClass,
  35                                    final String annotationQualifiedName,
  36                                    @NonNls final String parameterName) {
  37     myAnnotationQualifiedName = annotationQualifiedName;
  38     myClass = elementClass;
  39     myParameterName = parameterName;
  40   }
  41
  42   public boolean isAcceptable(Object element, PsiElement context) {
  43     final PsiElement parent = ((PsiElement)element).getParent();
  44     if (parent instanceof PsiNameValuePair) {
  45       final PsiNameValuePair pair = (PsiNameValuePair)parent;
  46       final String name = pair.getName();
  47       if (myParameterName.equals(name) || name == null && "value".equals(myParameterName)) {
  48         final PsiElement psiElement = pair.getParent();
  49         if (psiElement instanceof PsiAnnotationParameterList) {
  50           final PsiElement grandParent = psiElement.getParent();
  51           if (grandParent instanceof PsiAnnotation) {
  52             if (myAnnotationQualifiedName.equals(((PsiAnnotation)grandParent).getQualifiedName())) {
  53               return true;
  54             }
  55           }
  56         }
  57       }
  58     }
  59     return false;
  60   }
  61
  62   public boolean isClassAcceptable(Class hintClass) {
  63     return ReflectionCache.isAssignable(myClass, hintClass);
  64   }
  65 }