/***********************************************************************************************************************
* 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.pact.runtime.test.util;
import java.io.File;
import java.net.URI;
import java.net.URISyntaxException;
import eu.stratosphere.core.fs.FileInputSplit;
import eu.stratosphere.core.fs.Path;
import eu.stratosphere.core.io.InputSplit;
import eu.stratosphere.nephele.template.InputSplitProvider;
/**
* The mock input split provider implements the {@link InputSplitProvider} interface to serve input splits to the test
* jobs.
* <p>
* This class is thread-safe.
*
*/
public class MockInputSplitProvider implements InputSplitProvider {
/**
* The input splits to be served during the test.
*/
private volatile InputSplit[] inputSplits;
/**
* Index pointing to the next input split to be served.
*/
private int nextSplit = 0;
/**
* Generates a set of input splits from an input path
*
* @param path
* the path of the local file to generate the input splits from
* @param noSplits
* the number of input splits to be generated from the given input file
*/
public void addInputSplits(final String path, final int noSplits) {
final InputSplit[] tmp = new InputSplit[noSplits];
final String[] hosts = { "localhost" };
final String localPath;
try {
localPath = new URI(path).getPath();
} catch (URISyntaxException e) {
throw new IllegalArgumentException("Path URI can not be transformed to local path.");
}
final File inFile = new File(localPath);
final long splitLength = inFile.length() / noSplits;
long pos = 0;
for (int i = 0; i < noSplits - 1; i++) {
tmp[i] = new FileInputSplit(i, new Path(path), pos, splitLength, hosts);
pos += splitLength;
}
tmp[noSplits - 1] = new FileInputSplit(noSplits - 1, new Path(path), pos, inFile.length() - pos, hosts);
this.inputSplits = tmp;
}
@Override
public InputSplit getNextInputSplit() {
if (this.nextSplit < this.inputSplits.length) {
return this.inputSplits[this.nextSplit++];
}
return null;
}
}