/*
 * Copyright (c) 2011, grossmann
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * * Neither the name of the jo-widgets.org nor the
 *   names of its contributors may be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL jo-widgets.org BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

package org.jowidgets.impl.event;

import java.util.LinkedList;
import java.util.List;

import org.jowidgets.api.controller.ITreeSelectionEvent;
import org.jowidgets.api.widgets.ITreeNode;
import org.jowidgets.util.Assert;

public final class TreeSelectionEvent implements ITreeSelectionEvent {

    private final List<ITreeNode> selected;
    private final List<ITreeNode> unselected;

    public TreeSelectionEvent(final List<ITreeNode> selected, final List<ITreeNode> unselected) {

        Assert.paramNotNull(selected, "selected");
        Assert.paramNotNull(unselected, "unselected");

        this.selected = selected;
        this.unselected = unselected;
    }

    @Override
    public List<ITreeNode> getSelected() {
        return new LinkedList<ITreeNode>(selected);
    }

    @Override
    public List<ITreeNode> getUnselected() {
        return new LinkedList<ITreeNode>(unselected);
    }

    @Override
    public ITreeNode getFirstSelected() {
        if (selected.size() > 0) {
            return selected.get(0);
        }
        return null;
    }

    @Override
    public ITreeNode getFirstUnselected() {
        if (unselected.size() > 0) {
            return unselected.get(0);
        }
        return null;
    }

    @Override
    public String toString() {
        final StringBuilder result = new StringBuilder();
        result.append(TreeSelectionEvent.class.getSimpleName() + " unselected: {");
        for (final ITreeNode unselectedNode : unselected) {
            result.append(unselectedNode + ", ");
        }
        if (unselected.size() > 0) {
            result.replace(result.length() - 2, result.length(), "} ");
        }
        else {
            result.append("} ");
        }

        result.append(TreeSelectionEvent.class.getSimpleName() + " selected: {");
        for (final ITreeNode selectedNode : selected) {
            result.append(selectedNode + ", ");
        }
        if (selected.size() > 0) {
            result.replace(result.length() - 2, result.length(), "} ");
        }
        else {
            result.append("} ");
        }

        return result.toString();
    }

}