Ptidej-v5.2-master/POM Tests/data/ArgoUML_0.28/src/org/argouml/ui/targetmanager/TargetEvent.java
// $Id: TargetEvent.java 14228 2008-03-25 18:05:24Z tfmorris $
// Copyright (c) 2002-2008 The Regents of the University of California. All
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package org.argouml.ui.targetmanager;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.EventObject;
import java.util.List;

/**
 * An event indicating that the target of ArgoUML has changed
 * from the old set of Targets to the new set of Targets.
 * 
 * @author jaap.branderhorst@xs4all.nl
 */
public class TargetEvent extends EventObject {

    /**
     * Indicates that a total new set of targets is set.
     */
    public static final String TARGET_SET = "set";

    /**
     * Indicates that a target is being added to the list of targets.
     */
    public static final String TARGET_ADDED = "added";

    /**
     * Indicates that a target is being removed from the list of targets.
     */
    public static final String TARGET_REMOVED = "removed";

    /**
     * The name of the event.
     */
    private String theEventName;

    /**
     * The old targets before the change took place.
     */
    private Object[] theOldTargets;

    /**
     * The new targets after the change took place.
     */
    private Object[] theNewTargets;

    /**
     * Constructs a new TargetEvent.
     * 
     * @param source The source that fired the TargetEvent, will always be the
     *                TargetManager
     * @param tEName The name of the TargetEvent, can be TARGET_SET,
     *                TARGET_REMOVED or TARGET_ADDED
     * @param oldTargets The old targets before the change took place
     * @param newTargets The new targets after the change took place
     */
    public TargetEvent(Object source, String tEName,
		       Object[] oldTargets, Object[] newTargets) {
	super(source);
	theEventName = tEName;
        theOldTargets = oldTargets;
        theNewTargets = newTargets;
    }

    /**
     * Getter for the name.
     * @return the name of the event
     */
    public String getName() {
	return theEventName;
    }

    /**
     * Getter for the old targets.
     * @return an object array with the old targets
     */
    public Object[] getOldTargets() {
	return theOldTargets == null ? new Object[] {} : theOldTargets;
    }

    /**
     * Getter for the new targets.
     * @return an object array with the new targets
     */
    public Object[] getNewTargets() {
        return theNewTargets == null ? new Object[] {} : theNewTargets;
    }

    /**
     * Helper for getting the new target.
     * @return the zero'th element in _newTargets, or null
     */
    public Object getNewTarget() {
        return theNewTargets == null
            || theNewTargets.length < 1 ? null : theNewTargets[0];
    }

    /**
     * Gets the targets that are removed from the selection.
     * @return the removed targets
     */
    public Collection getRemovedTargetCollection() {
        List removedTargets = new ArrayList();
        List oldTargets = Arrays.asList(theOldTargets);
        List newTargets = Arrays.asList(theNewTargets);
        for (Object o : oldTargets) {
            if (!newTargets.contains(o)) {
                removedTargets.add(o);
            }
        }
        return removedTargets;
    }

    /**
     * Gets the targets that are removed from the selection.
     * @return the removed targets
     */
    public Object[] getRemovedTargets() {
        return getRemovedTargetCollection().toArray();
    }

    /**
     * Returns the targets that are added to the selection.
     * @return the added targets
     */
    public Collection getAddedTargetCollection() {
        List addedTargets = new ArrayList();
        List oldTargets = Arrays.asList(theOldTargets);
        List newTargets = Arrays.asList(theNewTargets);
        for (Object o : newTargets) {
            if (!oldTargets.contains(o)) {
                addedTargets.add(o);
            }
        }
        return addedTargets;
    }

    /**
     * Returns the targets that are added to the selection.
     * @return the added targets
     */
    public Object[] getAddedTargets() {
        return getAddedTargetCollection().toArray();
    }

    /**
     * The UID.
     */
    private static final long serialVersionUID = -307886693486269426L;
}

