001/*
002 * This library is part of OpenCms -
003 * the Open Source Content Management System
004 *
005 * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
006 *
007 * This library is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * This library is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * For further information about Alkacon Software, please see the
018 * company website: http://www.alkacon.com
019 *
020 * For further information about OpenCms, please see the
021 * project website: http://www.opencms.org
022 *
023 * You should have received a copy of the GNU Lesser General Public
024 * License along with this library; if not, write to the Free Software
025 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
026 */
027
028package org.opencms.ade.galleries.client.preview.util;
029
030import org.opencms.ade.galleries.shared.CmsPoint;
031import org.opencms.util.CmsStringUtil;
032
033import java.util.ArrayList;
034import java.util.List;
035
036/**
037 * A coordinate system transform represented as a composition of multiple other transforms.<p>
038 */
039public class CmsCompositeTransform implements I_CmsTransform {
040
041    /** The transforms this transform is composed of. */
042    private List<I_CmsTransform> m_transforms;
043
044    /**
045     * Creates a new instance.<p>
046     *
047     * @param transforms the list of transforms this transform should be composed of
048     */
049    public CmsCompositeTransform(List<I_CmsTransform> transforms) {
050
051        m_transforms = transforms;
052    }
053
054    /**
055     * @see java.lang.Object#toString()
056     */
057    @Override
058    public String toString() {
059
060        List<String> comps = new ArrayList<>();
061        for (I_CmsTransform tf : m_transforms) {
062            comps.add(tf.toString());
063        }
064        return CmsStringUtil.listAsString(comps, " ");
065    }
066
067    /**
068     * @see org.opencms.ade.galleries.client.preview.util.I_CmsTransform#transformBack(org.opencms.ade.galleries.shared.CmsPoint)
069     */
070    public CmsPoint transformBack(CmsPoint point) {
071
072        for (int i = m_transforms.size() - 1; i >= 0; i--) {
073            point = m_transforms.get(i).transformBack(point);
074        }
075        return point;
076    }
077
078    /**
079     * @see org.opencms.ade.galleries.client.preview.util.I_CmsTransform#transformForward(org.opencms.ade.galleries.shared.CmsPoint)
080     */
081    public CmsPoint transformForward(CmsPoint point) {
082
083        for (I_CmsTransform transform : m_transforms) {
084            point = transform.transformForward(point);
085        }
086        return point;
087    }
088
089}