platform/util/src/com/intellij/util/io/ExternalIntegerKeyDescriptor.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
  17 /*
  18  * @author max
  19  */
  20 package com.intellij.util.io;
  21
  22 import java.io.DataInput;
  23 import java.io.DataOutput;
  24 import java.io.IOException;
  25
  26 public class ExternalIntegerKeyDescriptor implements KeyDescriptor<Integer> {
  27   public static final EnumeratorIntegerDescriptor INSTANCE = new EnumeratorIntegerDescriptor();
  28
  29   public int getHashCode(final Integer value) {
  30     return value.intValue();
  31   }
  32
  33   public boolean isEqual(final Integer val1, final Integer val2) {
  34     return val1.equals(val2);
  35   }
  36
  37   public void save(final DataOutput out, final Integer value) throws IOException {
  38     DataInputOutputUtil.writeINT(out, value.intValue());
  39   }
  40
  41   public Integer read(final DataInput in) throws IOException {
  42     return DataInputOutputUtil.readINT(in);
  43   }
  44 }