hyracks-examples/btree-example/btreeclient/src/main/java/edu/uci/ics/hyracks/examples/btree/client/JobHelper.java

/*
 * Copyright 2009-2010 by The Regents of the University of California
 * 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 from
 * 
 *     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 edu.uci.ics.hyracks.examples.btree.client;

import java.io.File;

import edu.uci.ics.hyracks.api.constraints.AbsoluteLocationConstraint;
import edu.uci.ics.hyracks.api.constraints.ExplicitPartitionConstraint;
import edu.uci.ics.hyracks.api.constraints.LocationConstraint;
import edu.uci.ics.hyracks.api.constraints.PartitionConstraint;
import edu.uci.ics.hyracks.api.io.FileReference;
import edu.uci.ics.hyracks.dataflow.std.file.ConstantFileSplitProvider;
import edu.uci.ics.hyracks.dataflow.std.file.FileSplit;
import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;

public class JobHelper {
    public static IFileSplitProvider createFileSplitProvider(String[] splitNCs, String btreeFileName) {
        FileSplit[] fileSplits = new FileSplit[splitNCs.length];
        for (int i = 0; i < splitNCs.length; ++i) {
            String fileName = btreeFileName + "." + splitNCs[i];
            fileSplits[i] = new FileSplit(splitNCs[i], new FileReference(new File(fileName)));
        }
        IFileSplitProvider splitProvider = new ConstantFileSplitProvider(fileSplits);
        return splitProvider;
    }

    public static PartitionConstraint createPartitionConstraint(String[] splitNCs) {
        LocationConstraint[] lConstraints = new LocationConstraint[splitNCs.length];
        for (int i = 0; i < splitNCs.length; ++i) {
            lConstraints[i] = new AbsoluteLocationConstraint(splitNCs[i]);
        }
        return new ExplicitPartitionConstraint(lConstraints);
    }
}