java/java-impl/src/com/intellij/codeInsight/completion/PreferShorterWeigher.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.ExpectedTypeInfo;
  19 import com.intellij.codeInsight.lookup.LookupElement;
  20 import com.intellij.psi.codeStyle.NameUtil;
  21 import org.jetbrains.annotations.NotNull;
  22
  23 /**
  24  * @author peter
  25 */
  26 public class PreferShorterWeigher extends CompletionWeigher {
  27
  28   public Comparable weigh(@NotNull final LookupElement item, final CompletionLocation location) {
  29     final Object object = item.getObject();
  30     final String name = JavaCompletionUtil.getLookupObjectName(object);
  31     final ExpectedTypeInfo[] expectedInfos = JavaCompletionUtil.EXPECTED_TYPES.getValue(location);
  32
  33     if (name != null && expectedInfos != null && JavaCompletionUtil.getNameEndMatchingDegree(name, expectedInfos,
  34                                                                                              item.getPrefixMatcher().getPrefix()) != 0) {
  35       return 239 - NameUtil.nameToWords(name).length;
  36     }
  37     return 0;
  38
  39   }
  40 }