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CQL implementation for Achilles using Datastax Java driver

There is a newer version: 6.1.0

/*
 * Copyright (C) 2012-2014 DuyHai DOAN
 *
 *  Licensed 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 info.archinnov.achilles.internal.utils;

import com.google.common.base.Objects;

/**
 * Utility class to create a pair
 * @param  left type
 * @param  right type
 */
public class Pair {
	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());
	}

	@SuppressWarnings("rawtypes")
	@Override
	public final boolean equals(Object o) {
		if (!(o instanceof Pair))
			return false;
		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 + ")";
	}

    /**
     * Static factory method to create a pair.
     *
     * 
     *
     *  // types automatically inferred by compiler
     *  Pair<String,Long> pair = Pair.create("test",10L);
     *
     *  // force types to <Object,Number>
     *  Pair<Object,Number> pair = Pair.<Object,Number>create("test",10L);
     *
     * 
     *
     * @param x left object
     * @param y right object
     * @param  type of left object
     * @param  type of right object
     * @return
     */
	public static  Pair create(X x, Y y) {
		return new Pair(x, y);
	}
}