de.kp.core.arules.hadoop.TransactionListWritable.java Source code

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Here is the source code for de.kp.core.arules.hadoop.TransactionListWritable.java

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package de.kp.core.arules.hadoop;
/* Copyright (c) 2014 Dr. Krusche & Partner PartG
* 
* This file is part of the Core-ARULES project
* (https://github.com/skrusche63/core-arules).
* 
* Core-ARULES is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
* 
* Core-ARULES is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
* You should have received a copy of the GNU General Public License along with
* Core-ARULES. 
* 
* If not, see <http://www.gnu.org/licenses/>.
*/

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

import org.apache.hadoop.io.ArrayWritable;
import org.apache.hadoop.io.Writable;

import de.kp.core.arules.Transaction;

public class TransactionListWritable implements Writable {

    public ArrayWritable transactionListWritable;

    public TransactionListWritable() {

        List<TransactionWritable> empty = Collections.<TransactionWritable>emptyList();
        this.transactionListWritable = new ArrayWritable(TransactionWritable.class,
                empty.toArray(new Writable[empty.size()]));

    }

    public TransactionListWritable(List<Transaction> transactions) {

        ArrayList<TransactionWritable> items = new ArrayList<TransactionWritable>();
        for (int i = 0; i < transactions.size(); i++) {
            items.add(new TransactionWritable(transactions.get(i)));
        }

        this.transactionListWritable = new ArrayWritable(TransactionWritable.class,
                items.toArray(new Writable[items.size()]));

    }

    /* (non-Javadoc)
     * @see org.apache.hadoop.io.Writable#readFields(java.io.DataInput)
     */
    public void readFields(DataInput in) throws IOException {
        transactionListWritable.readFields(in);

    }

    /* (non-Javadoc)
     * @see org.apache.hadoop.io.Writable#write(java.io.DataOutput)
     */
    public void write(DataOutput out) throws IOException {
        transactionListWritable.write(out);
    }

    public ArrayList<Transaction> get() {

        Writable[] writableArray = transactionListWritable.get();

        ArrayList<Transaction> list = new ArrayList<Transaction>();
        for (int i = 0; i < writableArray.length; i++) {

            TransactionWritable item = (TransactionWritable) writableArray[i];
            list.add(item.get());

        }

        return list;

    }

}