FeatureCollectionWrapper.java

/*
 * The Unified Mapping Platform (JUMP) is an extensible, interactive GUI 
 * for visualizing and manipulating spatial features with geometry and attributes.
 *
 * Copyright (C) 2003 Vivid Solutions
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 * 
 * For more information, contact:
 *
 * Vivid Solutions
 * Suite #1A
 * 2328 Government Street
 * Victoria BC  V8T 5G5
 * Canada
 *
 * (250)385-6040
 * www.vividsolutions.com
 */

package com.vividsolutions.jump.feature;

import java.util.*;

import com.vividsolutions.jts.geom.Envelope;
import com.vividsolutions.jts.util.Assert;


public abstract class FeatureCollectionWrapper implements FeatureCollection {
    protected FeatureCollection fc;

    public FeatureCollectionWrapper(FeatureCollection fc) {
        this.fc = fc;
    }

    public FeatureCollection getUltimateWrappee() {
        FeatureCollection currentWrappee = fc;
        while (currentWrappee instanceof FeatureCollectionWrapper) {
            currentWrappee = ((FeatureCollectionWrapper)currentWrappee).fc;
        }
        return currentWrappee;
    }

    public void checkNotWrappingSameClass() {
        Assert.isTrue(!(fc instanceof FeatureCollectionWrapper &&
            ((FeatureCollectionWrapper) fc).hasWrapper(getClass())));
    }

    public Collection remove(Envelope env) {
        return fc.remove(env);
    }

    public boolean hasWrapper(Class c) {
        Assert.isTrue(FeatureCollectionWrapper.class.isAssignableFrom(c));

        if (c.isInstance(this)) {
            return true;
        }

        return fc instanceof FeatureCollectionWrapper &&
        ((FeatureCollectionWrapper) fc).hasWrapper(c);
    }

    public FeatureCollection getWrappee() {
        return fc;
    }

    public FeatureSchema getFeatureSchema() {
        return fc.getFeatureSchema();
    }

    public Envelope getEnvelope() {
        return fc.getEnvelope();
    }

    public int size() {
        return fc.size();
    }

    public boolean isEmpty() {
        return fc.isEmpty();
    }

    public List getFeatures() {
        return fc.getFeatures();
    }

    public Iterator iterator() {
        return fc.iterator();
    }

    public List query(Envelope envelope) {
        return fc.query(envelope);
    }

    public void add(Feature feature) {
        fc.add(feature);
    }

    public void remove(Feature feature) {
        fc.remove(feature);
    }

    public void addAll(Collection features) {
        fc.addAll(features);
    }

    public void removeAll(Collection features) {
        fc.removeAll(features);
    }

    public void clear() {
        //Create a new ArrayList to avoid a ConcurrentModificationException. [Jon Aquino]
        removeAll(new ArrayList(getFeatures()));
    }
}