com.bah.culvert.transactions.Put.java Source code

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Here is the source code for com.bah.culvert.transactions.Put.java

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/**
 * Copyright 2011 Booz Allen Hamilton.
 * 
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership. Booz Allen Hamilton
 * 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 com.bah.culvert.transactions;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.apache.hadoop.io.Writable;

import com.bah.culvert.data.CKeyValue;
import com.google.common.collect.Iterables;

/**
 * Put a {@link List} of keys and values into a table
 */
public class Put implements Writable {

    /**
     * List of the key/value pairs that are in this put.
     */
    private final List<CKeyValue> keyValueList;

    public Put() {
        this.keyValueList = new ArrayList<CKeyValue>();
    }

    /**
     * Put a list of keys and values
     * 
     * @param keyValueList to put
     */
    public Put(Iterable<CKeyValue> keyValueList) {
        this.keyValueList = new ArrayList<CKeyValue>();
        for (CKeyValue keyValue : keyValueList) {
            this.keyValueList.add(keyValue);
        }
    }

    /**
     * Convenience constructor for putting rows
     * 
     * @param cKeyValues to put
     */
    public Put(CKeyValue... cKeyValues) {
        this.keyValueList = Arrays.asList(cKeyValues);
    }

    /**
     * @return the keys and values to put
     */
    public Iterable<CKeyValue> getKeyValueList() {
        return keyValueList;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.lang.Object#equals(java.lang.Object)
     */
    @Override
    public boolean equals(Object obj) {
        if (obj instanceof Put) {
            return Iterables.elementsEqual(((Put) obj).keyValueList, this.keyValueList);
        }
        return false;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.hadoop.io.Writable#write(java.io.DataOutput)
     */
    @Override
    public void write(DataOutput out) throws IOException {
        out.writeInt(keyValueList.size());
        for (CKeyValue keyValue : keyValueList) {
            keyValue.write(out);
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.lang.Object#hashCode()
     */
    @Override
    public int hashCode() {
        int hash = "Put".hashCode();
        for (CKeyValue kv : keyValueList) {
            hash *= 127;
            hash += kv.hashCode();
        }
        hash *= 127;
        return hash;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.hadoop.io.Writable#readFields(java.io.DataInput)
     */
    @Override
    public void readFields(DataInput in) throws IOException {
        keyValueList.clear();
        int len = in.readInt();
        for (int i = 0; i < len; i++) {
            CKeyValue kv = new CKeyValue();
            kv.readFields(in);
            keyValueList.add(kv);
        }
    }
}