org.apache.lucene.util.mutable.MutableValueDouble Maven / Gradle / Ivy
/*
* 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 double.
* When mutating instances of this object, the caller is responsible for ensuring
* that any instance where exists is set to false must also
* value set to 0.0D for proper operation.
*/
public class MutableValueDouble extends MutableValue {
public double value = 0.0D;
@Override
public Object toObject() {
assert exists || 0.0D == value;
return exists ? value : null;
}
@Override
public void copy(MutableValue source) {
MutableValueDouble s = (MutableValueDouble) source;
value = s.value;
exists = s.exists;
}
@Override
public MutableValue duplicate() {
MutableValueDouble v = new MutableValueDouble();
v.value = this.value;
v.exists = this.exists;
return v;
}
@Override
public boolean equalsSameType(Object other) {
assert exists || 0.0D == value;
MutableValueDouble b = (MutableValueDouble)other;
return value == b.value && exists == b.exists;
}
@Override
public int compareSameType(Object other) {
assert exists || 0.0D == value;
MutableValueDouble b = (MutableValueDouble)other;
int c = Double.compare(value, b.value);
if (c != 0) return c;
if (exists == b.exists) return 0;
return exists ? 1 : -1;
}
@Override
public int hashCode() {
assert exists || 0.0D == value;
long x = Double.doubleToLongBits(value);
return (int)x + (int)(x>>>32);
}
}