edu.mit.streamjit.impl.distributed.common.Utils.java Source code

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Here is the source code for edu.mit.streamjit.impl.distributed.common.Utils.java

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/*
 * Copyright (c) 2013-2014 Massachusetts Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package edu.mit.streamjit.impl.distributed.common;

import java.util.Collections;
import java.util.Set;

import com.google.common.collect.ImmutableSet;

import edu.mit.streamjit.api.Worker;
import edu.mit.streamjit.impl.blob.Blob;
import edu.mit.streamjit.impl.blob.Blob.Token;
import edu.mit.streamjit.impl.common.IOInfo;

/**
 * @author Sumanan sumanan@mit.edu
 * @since Jul 30, 2013
 */
public class Utils {

    public static Token getBlobID(Blob b) {
        return Collections.min(b.getInputs());
    }

    public static Token getblobID(Set<Worker<?, ?>> workers) {
        ImmutableSet.Builder<Token> inputBuilder = new ImmutableSet.Builder<>();
        for (IOInfo info : IOInfo.externalEdges(workers)) {
            if (info.isInput())
                inputBuilder.add(info.token());
        }

        return Collections.min(inputBuilder.build());
    }
}