GmlEnvelopeConverter.java

/**
 * Copyright (c) Codice Foundation
 *
 * This 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 3 of the
 * License, or 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
 * Lesser General Public License for more details. A copy of the GNU Lesser General Public License
 * is distributed along with this program and can be found at
 * <http://www.gnu.org/licenses/lgpl.html>.
 *
 **/

package org.codice.ddf.spatial.ogc.wfs.catalog.converter.impl;

import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.converters.MarshallingContext;
import com.thoughtworks.xstream.converters.UnmarshallingContext;
import com.thoughtworks.xstream.io.HierarchicalStreamReader;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
import com.vividsolutions.jts.geom.Envelope;

public class GmlEnvelopeConverter implements Converter {

    private static final String BOX_NODE_NAME = "gml:Box";

    private static final String COORDINATE_NODE_NAME = "gml:coordinates";

    private static final String SRS_NAME = "srsName";

    private static final String SRS_VALUE = "EPSG:4326";

    @Override
    public boolean canConvert(Class clazz) {
        return Envelope.class.isAssignableFrom(clazz);
    }

    @Override
    public void marshal(Object value, HierarchicalStreamWriter writer, MarshallingContext context) {
        Envelope envelope = (Envelope) value;

        StringBuilder boxString = new StringBuilder();
        boxString.append(envelope.getMinX()).append(",").append(envelope.getMinY()).append(" ")
                .append(envelope.getMaxX()).append(",").append(envelope.getMaxY());

        writer.startNode(BOX_NODE_NAME);
        writer.addAttribute(SRS_NAME, SRS_VALUE);
        writer.startNode(COORDINATE_NODE_NAME);
        writer.setValue(boxString.toString());
        writer.endNode();
        writer.endNode();
    }

    @Override
    public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {
        return null;
    }

}