JdbcTypeDefaultHasher.java

/*
 * 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.ignite.cache.store.jdbc;

import java.util.Collection;

/**
 * Default implementation of {@link JdbcTypeHasher}.
 *
 * This implementation ignores type and field names.
 */
public class JdbcTypeDefaultHasher implements JdbcTypeHasher {
    /** */
    private static final long serialVersionUID = 0L;

    /** Singleton instance to use. */
    public static final JdbcTypeHasher INSTANCE = new JdbcTypeDefaultHasher();

    /** {@inheritDoc} */
    @Override public int hashCode(Collection<?> values) {
        int hash = 0;

        for (Object val : values)
            hash = 31 * hash + (val != null ? val.hashCode() : 0);

        return hash;
    }
}