java/java-impl/src/com/intellij/codeInsight/completion/StaticMembersWeigher.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.codeInsight.completion;
  17
  18 import com.intellij.codeInsight.lookup.LookupElement;
  19 import com.intellij.psi.*;
  20 import com.intellij.psi.javadoc.PsiDocComment;
  21 import com.intellij.psi.util.PsiTreeUtil;
  22 import org.jetbrains.annotations.NotNull;
  23
  24 /**
  25  * @author peter
  26  */
  27 public class StaticMembersWeigher extends CompletionWeigher {
  28   public Comparable weigh(@NotNull LookupElement element, CompletionLocation loc) {
  29     if (loc.getCompletionType() != CompletionType.BASIC) return 0;
  30
  31     final PsiElement position = loc.getCompletionParameters().getPosition();
  32     if (!position.isValid()) return 0;
  33
  34     if (PsiTreeUtil.getParentOfType(position, PsiDocComment.class) != null) return 0;
  35     if (position.getParent() instanceof PsiReferenceExpression) {
  36       final PsiReferenceExpression refExpr = (PsiReferenceExpression)position.getParent();
  37       final PsiElement qualifier = refExpr.getQualifier();
  38       if (qualifier == null) {
  39         return 0;
  40       }
  41       if (!(qualifier instanceof PsiJavaCodeReferenceElement) || !(((PsiJavaCodeReferenceElement)qualifier).resolve() instanceof PsiClass)) {
  42         return 0;
  43       }
  44     }
  45
  46     final Object o = element.getObject();
  47     if (!(o instanceof PsiMember)) return 0;
  48
  49     if (((PsiMember)o).hasModifierProperty(PsiModifier.STATIC)) {
  50       if (o instanceof PsiMethod) return 5;
  51       if (o instanceof PsiField) return 4;
  52     }
  53
  54     if (o instanceof PsiClass && ((PsiClass) o).getContainingClass() != null) {
  55       return 3;
  56     }
  57
  58     //instance method or field
  59     return 5;
  60   }
  61 }