Library: org.gvsig.sldtools

/*******************************************************************************

 *

 *   gvSIG. Desktop Geographic Information System.

 *  

 *   Copyright (C) 2007-2013 gvSIG Association.

 *  

 *   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 3

 *   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., 51 Franklin Street, Fifth Floor, Boston,

 *   MA  02110-1301, USA.

 *  

 *   For any additional information, do not hesitate to contact us

 *   at info AT gvsig.com, or visit our website www.gvsig.com.

 *   

 *******************************************************************************/

package org.gvsig.sldsupport.impl.sld.parsing;

import java.io.IOException;

import java.util.HashMap;

import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;

import org.gvsig.sldsupport.exception.InvalidSLDObjectException;

import org.gvsig.sldsupport.exception.SLDReadException;

import org.gvsig.sldsupport.exception.UnsupportedSLDObjectException;

import org.gvsig.sldsupport.impl.filter.DefaultSLDFilter;

import org.gvsig.sldsupport.impl.sld.parsing.filteroperator.FilterOperatorElement;

import org.gvsig.sldsupport.impl.util.SLDUtils;

import org.gvsig.sldsupport.impl.util.XmlBuilder;

import org.gvsig.sldsupport.sld.SLDTags;

import org.gvsig.sldsupport.sld.filter.SLDFilter;

import org.gvsig.sldsupport.sld.filter.SLDFilterOperator;

public class FilterElement {

    public static void append(SLDFilter obj, XmlBuilder xb, String version)

        throws InvalidSLDObjectException, UnsupportedSLDObjectException {

        if (obj.isElse()) {

            xb.writeTag(SLDTags.ELSEFILTER, new HashMap());

            return;

        }

        // ===== Not ELSE ==============

        xb.openTag(SLDTags.FILTER);

        SLDFilterOperator op = obj.getFilterOperator();

        if (op == null) {

            throw new InvalidSLDObjectException(SLDTags.FILTER,

                "No filter operator found.");

        } else {

            FilterOperatorElement.append(op, xb, version);

        }

        xb.closeTag();

    }

    public static SLDFilter parse(XmlPullParser parser, String version)

        throws XmlPullParserException, IOException, SLDReadException {

        String name = parser.getName();

        int tag = 0;

        SLDFilter resp = null;

        if (SLDUtils.isStr(name, SLDTags.ELSEFILTER)) {

            resp = new DefaultSLDFilter();

            resp.setIsElse(true);

            while (!(SLDUtils.isStr(name, SLDTags.ELSEFILTER) && (tag == XmlPullParser.END_TAG))) {

                tag = parser.next();

                name = parser.getName();

            }

            parser.require(XmlPullParser.END_TAG, null, SLDTags.ELSEFILTER);

            parser.nextTag();

            return resp;

        }

        parser.require(XmlPullParser.START_TAG, null, SLDTags.FILTER);

        resp = new DefaultSLDFilter();

        resp.setIsElse(false);

        parser.nextTag();

        SLDFilterOperator operator =

            FilterOperatorElement.parse(parser, version);

        resp.setFilterOperator(operator);

        parser.require(XmlPullParser.END_TAG, null, SLDTags.FILTER);

        parser.nextTag();

        return resp;

    }

}