| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.lucene.util.mutable; |
| |
| /** |
| * {@link MutableValue} implementation of type <code>int</code>. |
| * When mutating instances of this object, the caller is responsible for ensuring |
| * that any instance where <code>exists</code> is set to <code>false</code> must also |
| * <code>value</code> set to <code>0</code> for proper operation. |
| */ |
| public class MutableValueInt extends MutableValue { |
| public int value; |
| |
| @Override |
| public Object toObject() { |
| assert exists || 0 == value; |
| return exists ? value : null; |
| } |
| |
| @Override |
| public void copy(MutableValue source) { |
| MutableValueInt s = (MutableValueInt) source; |
| value = s.value; |
| exists = s.exists; |
| } |
| |
| @Override |
| public MutableValue duplicate() { |
| MutableValueInt v = new MutableValueInt(); |
| v.value = this.value; |
| v.exists = this.exists; |
| return v; |
| } |
| |
| @Override |
| public boolean equalsSameType(Object other) { |
| assert exists || 0 == value; |
| MutableValueInt b = (MutableValueInt)other; |
| return value == b.value && exists == b.exists; |
| } |
| |
| @Override |
| public int compareSameType(Object other) { |
| assert exists || 0 == value; |
| MutableValueInt b = (MutableValueInt)other; |
| int ai = value; |
| int bi = b.value; |
| if (ai<bi) return -1; |
| else if (ai>bi) return 1; |
| |
| if (exists == b.exists) return 0; |
| return exists ? 1 : -1; |
| } |
| |
| |
| @Override |
| public int hashCode() { |
| assert exists || 0 == value; |
| // TODO: if used in HashMap, it already mixes the value... maybe use a straight value? |
| return (value>>8) + (value>>16); |
| } |
| } |