org.glassfish.admingui.plugin.IntegrationPointComparator Maven / Gradle / Ivy

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package org.glassfish.admingui.plugin;

import java.io.Serializable;
import java.util.Comparator;

/**
 *  	This class compares two {@link IntegrationPoint} Objects.  See
 *	{@link #compare()} for more details.
 */
public class IntegrationPointComparator implements Comparator, Serializable {
    /**
     *	 Protected constructor.  Use {@link #getInstance()} instead.
     */
    protected IntegrationPointComparator() {
    }

    /**
     *	 Accessor for this Comparator.
     */
    public static IntegrationPointComparator getInstance() {
	return _instance;
    }

    /**
     *	 This method compares two {@link IntegrationPoint}s.  It will first
     *	    check the parentId, then the priority if
     *	    the parentIds are equal.  If the priorities happen to
     *	    be equal as well, it will compare the ids.
     */
    public int compare(IntegrationPoint ip1, IntegrationPoint ip2) {
	// First check parentIds
	String left = "" + ip1.getParentId();
	int result = left.compareTo("" + ip2.getParentId());
	if (result == 0) {
	    // parentIds are the same, check the priorities
	    result = ip1.getPriority() - ip2.getPriority();
	    if (result == 0) {
		// priorities are the same, check the ids
		left = "" + ip1.getId();
		result = left.compareTo("" + ip2.getId());
		if (result == 0) {
		    // Equal
		    return 0;
		}
	    }
	}

	// Return the answer
	return (result < 0) ? -1 : 1;
    }

    private static IntegrationPointComparator _instance =
	    new IntegrationPointComparator();
}