org.kalypso.ogc.gml.outline.nodes.FeatureThemeNode.java Source code

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Here is the source code for org.kalypso.ogc.gml.outline.nodes.FeatureThemeNode.java

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/*----------------    FILE HEADER KALYPSO ------------------------------------------
 *
 *  This file is part of kalypso.
 *  Copyright (C) 2004 by:
 *
 *  Technical University Hamburg-Harburg (TUHH)
 *  Institute of River and coastal engineering
 *  Denickestrae 22
 *  21073 Hamburg, Germany
 *  http://www.tuhh.de/wb
 *
 *  and
 *
 *  Bjoernsen Consulting Engineers (BCE)
 *  Maria Trost 3
 *  56070 Koblenz, Germany
 *  http://www.bjoernsen.de
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact:
 *
 *  E-Mail:
 *  belger@bjoernsen.de
 *  schlienger@bjoernsen.de
 *  v.doemming@tuhh.de
 *
 *  ---------------------------------------------------------------------------*/
package org.kalypso.ogc.gml.outline.nodes;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.collections.Predicate;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;
import org.kalypso.ogc.gml.IKalypsoFeatureTheme;
import org.kalypso.ogc.gml.IKalypsoStyle;
import org.kalypsodeegree.xml.Marshallable;

/**
 * @author Gernot Belger
 */
public class FeatureThemeNode extends KalypsoThemeNode<IKalypsoFeatureTheme> {
    FeatureThemeNode(final IThemeNode parent, final IKalypsoFeatureTheme theme) {
        super(parent, theme);

        Assert.isNotNull(theme);
    }

    @Override
    public boolean hasChildren() {
        final IKalypsoFeatureTheme theme = getElement();
        if (theme.shouldShowLegendChildren() == false)
            return false;

        return super.hasChildren();
    }

    @Override
    public boolean hasChildrenCompact() {
        final IKalypsoFeatureTheme theme = getElement();
        if (theme.shouldShowLegendChildren() == false)
            return false;

        return super.hasChildrenCompact();
    }

    @Override
    public IThemeNode[] getChildren() {
        final IThemeNode[] children = super.getChildren();

        final IKalypsoFeatureTheme theme = getElement();
        if (theme.shouldShowLegendChildren() == false)
            return new IThemeNode[] {};

        return children;
    }

    private IThemeNode findImageChild(final IThemeNode[] children) {
        final String externIconUrn = getElement().getLegendIcon();
        if (externIconUrn == null) {
            if (children.length == 0)
                return null;

            return children[0];
        }

        /* Check, if it is a special URN. */
        final Pattern p = Pattern.compile("^urn:kalypso:map:theme:swtimage:style:(.*):rule:(.*)$", //$NON-NLS-1$
                Pattern.MULTILINE);
        final Matcher m = p.matcher(externIconUrn.trim());

        if (!m.matches() || m.groupCount() != 2)
            return null;

        /* A special URN was defined. Evaluate it. */
        final String styleName = m.group(1);
        final String ruleName = m.group(2);

        final IThemeNode themeNode = findObject(children, styleName);
        if (themeNode == null)
            return null;

        final Object[] ftsChildren = themeNode.getChildren();
        return RuleNode.findObject(ftsChildren, ruleName);
    }

    @Override
    protected Object[] getElementChildren() {
        final IKalypsoStyle[] styles = getElement().getStyles();

        final Predicate noSelectionStyles = new Predicate() {
            @Override
            public boolean evaluate(final Object object) {
                final IKalypsoStyle style = (IKalypsoStyle) object;
                return !style.isUsedForSelection();
            }
        };

        final List<IKalypsoStyle> filteredList = new ArrayList<>(Arrays.asList(styles));
        CollectionUtils.filter(filteredList, noSelectionStyles);
        return filteredList.toArray(new IKalypsoStyle[filteredList.size()]);
    }

    @Override
    protected Image createExternalIcon(final String externIconUrn) {
        final IThemeNode imageChild = findImageChild(super.getChildren());
        if (imageChild == null)
            return super.createExternalIcon(externIconUrn);

        /* Found the right one, need this image icon. */
        final ImageDescriptor descriptor = imageChild.getImageDescriptor();
        if (descriptor == null)
            return null;

        return descriptor.createImage();
    }

    public static IThemeNode findObject(final Object[] objects, final String styleName) {
        for (final Object object : objects) {
            if (object instanceof UserStyleNode) {
                final UserStyleNode usto = (UserStyleNode) object;
                if (usto.getStyle().getName().equals(styleName))
                    return usto;
            } else if (object instanceof FeatureTypeStyleNode) {
                final FeatureTypeStyleNode fts = (FeatureTypeStyleNode) object;
                final String ftsName = fts.getStyle().getName();
                if (ftsName != null && ftsName.equals(styleName))
                    return fts;
            }
        }

        return null;
    }

    @Override
    public Object getAdapter(final Class adapter) {
        if (adapter == Marshallable.class) {
            final IKalypsoStyle[] styles = getElement().getStyles();
            final StyleSldExporter styleSldExporter = new StyleSldExporter(styles, getLabel());
            return styleSldExporter.createMarshallable();
        }

        return super.getAdapter(adapter);
    }
}