GridifySetToValueTarget.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.ignite.gridify;

import java.io.Serializable;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import org.apache.ignite.compute.gridify.GridifySetToValue;

/**
 * Test set-to-value target.
 */
public class GridifySetToValueTarget implements GridifySetToValueTargetInterface, Serializable {
    /**
     * Find maximum value in collection.
     *
     * @param input Input collection.
     * @return Maximum value.
     */
    @GridifySetToValue(igniteInstanceName = "GridifySetToValueTarget", threshold = 2, splitSize = 2)
    @Override public Long findMaximum(Collection<Long> input) {
        return findMaximum0(input);
    }

    /**
     * Find maximum value in collection.
     *
     * @param input Input collection.
     * @return Maximum value.
     */
    @GridifySetToValue(igniteInstanceName = "GridifySetToValueTarget")
    @Override public Long findMaximumInList(List<Long> input) {
        return findMaximum0(input);
    }

    /**
     * Find maximum value in collection.
     *
     * @param input Input collection.
     * @return Maximum value.
     */
    @GridifySetToValue(igniteInstanceName = "GridifySetToValueTarget", threshold = 2)
    @Override public Long findMaximumWithoutSplitSize(Collection<Long> input) {
        return findMaximum0(input);
    }

    /**
     * Find maximum value in collection.
     *
     * @param input Input collection.
     * @return Maximum value.
     */
    @GridifySetToValue(igniteInstanceName = "GridifySetToValueTarget")
    @Override public Long findMaximumWithoutSplitSizeAndThreshold(Collection<Long> input) {
        return findMaximum0(input);
    }

    /**
     * Find maximum in array.
     *
     * @param input Input collection.
     * @return Maximum value.
     */
    @GridifySetToValue(igniteInstanceName = "GridifySetToValueTarget", threshold = 2, splitSize = 2)
    @Override public Long findPrimesInArray(Long[] input) {
        return findMaximumInArray0(input);
    }

    /**
     * Find maximum in primitive array.
     *
     * @param input Input collection.
     * @return Maximum value.
     */
    @GridifySetToValue(igniteInstanceName = "GridifySetToValueTarget", threshold = 2, splitSize = 2)
    @Override public long findMaximumInPrimitiveArray(long[] input) {
        return findMaximumInPrimitiveArray0(input);
    }

    /**
     * Find maximum value in collection.
     *
     * @param input Input collection.
     * @return Maximum value.
     */
    private Long findMaximum0(Collection<Long> input) {
        System.out.println(">>>");
        System.out.println("Find maximum in: " + input);
        System.out.println(">>>");

        return Collections.max(input);
    }

    /**
     * Find maximum value in array.
     *
     * @param input Input collection.
     * @return Maximum value.
     */
    private Long findMaximumInArray0(Long[] input) {
        System.out.println(">>>");
        System.out.println("Find maximum in array: " + Arrays.asList(input));
        System.out.println(">>>");

        return Collections.max(Arrays.asList(input));
    }

    /**
     * Find maximum value in array.
     *
     * @param input Input collection.
     * @return Maximum value.
     */
    private long findMaximumInPrimitiveArray0(long[] input) {
        assert input != null;
        assert input.length > 0;
        System.out.println(">>>");
        System.out.println("Find maximum in primitive array: " + Arrays.toString(input));
        System.out.println(">>>");

        long maximum = input[0];

        for (int i = 1; i < input.length; i++) {
            if (input[i] > maximum)
                maximum = input[i];
        }

        return maximum;
    }

    /**
     * Find maximum value in Iterator.
     *
     * @param input Input collection.
     * @return Maximum value.
     */
    @GridifySetToValue(igniteInstanceName = "GridifySetToValueTarget", threshold = 2, splitSize = 2)
    @Override public long findMaximumInIterator(Iterator<Long> input) {
        assert input != null;
        assert input.hasNext();

        System.out.println(">>>");
        System.out.println("Find maximum in iterator: " + input);
        System.out.println(">>>");

        long maximum = input.next();

        while(input.hasNext()) {
            Long val = input.next();

            if (val > maximum)
                maximum = val;
        }

        return maximum;
    }

    /**
     * Find maximum value in Enumeration.
     *
     * @param input Input collection.
     * @return Maximum value.
     */
    @GridifySetToValue(igniteInstanceName = "GridifySetToValueTarget", threshold = 2, splitSize = 2)
    @Override public long findMaximumInEnumeration(Enumeration<Long> input) {
        assert input != null;
        assert input.hasMoreElements();

        System.out.println(">>>");
        System.out.println("Find maximum in enumeration: " + input);
        System.out.println(">>>");

        long maximum = input.nextElement();

        while(input.hasMoreElements()) {
            Long val = input.nextElement();

            if (val > maximum)
                maximum = val;
        }

        return maximum;
    }
}