scylla-jmx/src/main/java/com/scylladb/jmx/utils/Pair.java

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/*
* 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.
*/
/*
* Copyright 2015 Cloudius Systems
*
* Modified by Cloudius Systems
*/
package com.scylladb.jmx.utils;
import com.google.common.base.Objects;
public class Pair<T1, T2>
{
public final T1 left;
public final T2 right;
protected Pair(T1 left, T2 right)
{
this.left = left;
this.right = right;
}
@Override
public final int hashCode()
{
int hashCode = 31 + (left == null ? 0 : left.hashCode());
return 31*hashCode + (right == null ? 0 : right.hashCode());
}
@Override
public final boolean equals(Object o)
{
if(!(o instanceof Pair))
return false;
@SuppressWarnings("rawtypes")
Pair that = (Pair)o;
// handles nulls properly
return Objects.equal(left, that.left) && Objects.equal(right, that.right);
}
@Override
public String toString()
{
return "(" + left + "," + right + ")";
}
public static <X, Y> Pair<X, Y> create(X x, Y y)
{
return new Pair<X, Y>(x, y);
}
}