IntTupleDataInFormat.java

/***********************************************************************************************************************
 * Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
 *
 * 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 eu.stratosphere.test.recordJobs.util;

import eu.stratosphere.api.java.record.io.DelimitedInputFormat;
import eu.stratosphere.types.IntValue;
import eu.stratosphere.types.Record;

public class IntTupleDataInFormat extends DelimitedInputFormat {
	private static final long serialVersionUID = 1L;

	public static final int MAX_COLUMNS = 20;

	public static final int DELIMITER = '|';
	
	private final IntValue key = new IntValue();
	private final int[] offsets = new int[MAX_COLUMNS];

	@Override
	public Record readRecord(Record target, byte[] line, int offset, int numBytes) {
		final int limit = offset + numBytes;
		int readPos = offset;

		// allocate the offsets array
		final int[] offsets = this.offsets;
		offsets[0] = offset;

		int col = 1; // the column we are in

		while (readPos < limit) {
			if (line[readPos++] == DELIMITER) {
				offsets[col++] = readPos;
			}
		}

		final Tuple value = new Tuple(line, offsets, col - 1);
		this.key.setValue((int) value.getLongValueAt(0));
		
		target.setField(0, this.key);
		target.setField(1, value);
		return target;
	}
}