java/java-impl/src/com/intellij/psi/impl/source/tree/java/ImplementsListElement.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.impl.source.tree.java;
  17
  18 import com.intellij.openapi.diagnostic.Logger;
  19 import com.intellij.psi.PsiKeyword;
  20 import com.intellij.psi.tree.IElementType;
  21 import com.intellij.psi.tree.ChildRoleBase;
  22 import com.intellij.psi.impl.source.tree.ChildRole;
  23 import com.intellij.lang.ASTNode;
  24
  25 /**
  26  *  @author dsl
  27  */
  28 public class ImplementsListElement extends ReferenceListElement {
  29   private static final Logger LOG = Logger.getInstance("#com.intellij.psi.impl.source.tree.java.ImplementsListElement");
  30
  31   public ImplementsListElement() {
  32     super(IMPLEMENTS_LIST);
  33   }
  34
  35   protected String getKeywordText() {
  36     return PsiKeyword.IMPLEMENTS;
  37   }
  38
  39   protected IElementType getKeywordType() {
  40     return IMPLEMENTS_KEYWORD;
  41   }
  42
  43   public ASTNode findChildByRole(int role) {
  44     LOG.assertTrue(ChildRole.isUnique(role));
  45     switch(role){
  46       default:
  47         return null;
  48
  49       case ChildRole.EXTENDS_KEYWORD:
  50         return findChildByType(EXTENDS_KEYWORD);
  51     }
  52   }
  53
  54   public int getChildRole(ASTNode child) {
  55     LOG.assertTrue(child.getTreeParent() == this);
  56     IElementType i = child.getElementType();
  57     if (i == IMPLEMENTS_KEYWORD) {
  58       return ChildRole.IMPLEMENTS_KEYWORD;
  59     }
  60     else if (i == COMMA) {
  61       return ChildRole.COMMA;
  62     }
  63     else if (i == JAVA_CODE_REFERENCE) {
  64       return ChildRole.REFERENCE_IN_LIST;
  65     }
  66     else {
  67       return ChildRoleBase.NONE;
  68     }
  69   }
  70 }