001    //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/graphics/sld/LayerFeatureConstraints.java $
002    /*----------------------------------------------------------------------------
003     This file is part of deegree, http://deegree.org/
004     Copyright (C) 2001-2009 by:
005       Department of Geography, University of Bonn
006     and
007       lat/lon GmbH
008    
009     This library is free software; you can redistribute it and/or modify it under
010     the terms of the GNU Lesser General Public License as published by the Free
011     Software Foundation; either version 2.1 of the License, or (at your option)
012     any later version.
013     This library is distributed in the hope that it will be useful, but WITHOUT
014     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015     FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016     details.
017     You should have received a copy of the GNU Lesser General Public License
018     along with this library; if not, write to the Free Software Foundation, Inc.,
019     59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020    
021     Contact information:
022    
023     lat/lon GmbH
024     Aennchenstr. 19, 53177 Bonn
025     Germany
026     http://lat-lon.de/
027    
028     Department of Geography, University of Bonn
029     Prof. Dr. Klaus Greve
030     Postfach 1147, 53001 Bonn
031     Germany
032     http://www.geographie.uni-bonn.de/deegree/
033    
034     e-mail: info@deegree.org
035    ----------------------------------------------------------------------------*/
036    package org.deegree.graphics.sld;
037    
038    import java.util.ArrayList;
039    import java.util.List;
040    
041    import org.deegree.framework.xml.Marshallable;
042    
043    /**
044     * The LayerFeatureConstraints element is optional in a NamedLayer and allows the user to specify
045     * constraints on what features of what feature types are to be selected by the named-layer
046     * reference. It is essentially a filter that allows the selection of fewer features than are
047     * present in the named layer.
048     *
049     *
050     * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
051     * @author last edited by: $Author: mschneider $
052     *
053     * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18 Jun 2009) $
054     */
055    public class LayerFeatureConstraints implements Marshallable {
056        private List<FeatureTypeConstraint> featureTypeConstraint = null;
057    
058        /**
059         * constructor initializing the class with the <LayerFeatureConstraints>
060         * @param featureTypeConstraint
061         */
062        public LayerFeatureConstraints( FeatureTypeConstraint[] featureTypeConstraint ) {
063            this.featureTypeConstraint = new ArrayList<FeatureTypeConstraint>();
064            setFeatureTypeConstraint( featureTypeConstraint );
065        }
066    
067        /**
068         * A FeatureTypeConstraint element is used to identify a feature type by a well-known name,
069         * using the FeatureTypeName element.
070         *
071         * @return the FeatureTypeConstraints as Array
072         *
073         */
074        public FeatureTypeConstraint[] getFeatureTypeConstraint() {
075            return featureTypeConstraint.toArray( new FeatureTypeConstraint[featureTypeConstraint.size()] );
076        }
077    
078        /**
079         * sets the <FeatureTypeConstraint>
080         *
081         * @param featureTypeConstraint
082         *            the <FeatureTypeConstraint>
083         */
084        public void setFeatureTypeConstraint( FeatureTypeConstraint[] featureTypeConstraint ) {
085            this.featureTypeConstraint.clear();
086    
087            if ( featureTypeConstraint != null ) {
088                for ( int i = 0; i < featureTypeConstraint.length; i++ ) {
089                    this.featureTypeConstraint.add( featureTypeConstraint[i] );
090                }
091            }
092        }
093    
094        /**
095         * adds the <FeatureTypeConstraint>
096         *
097         * @param featureTypeConstraint
098         *            the <FeatureTypeConstraint>
099         */
100        public void addFeatureTypeConstraint( FeatureTypeConstraint featureTypeConstraint ) {
101            this.featureTypeConstraint.add( featureTypeConstraint );
102        }
103    
104        /**
105         * Removes a FeatureTypeConstraint.
106         *
107         * @param featureTypeConstraint
108         *            the <FeatureTypeConstraint>
109         */
110        public void removeFeatureTypeConstraint( FeatureTypeConstraint featureTypeConstraint ) {
111            this.featureTypeConstraint.remove( this.featureTypeConstraint.indexOf( featureTypeConstraint ) );
112        }
113    
114        /**
115         * returns the LayerFeatureConstraints as String.
116         *
117         * @return the LayerFeatureConstraints as String
118         */
119        @Override
120        public String toString() {
121            String ret = getClass().getName() + "\n";
122            ret = "featureTypeConstraint = " + featureTypeConstraint + "\n";
123    
124            return ret;
125        }
126    
127        /**
128         * exports the content of the Font as XML formated String
129         *
130         * @return xml representation of the Font
131         */
132        public String exportAsXML() {
133    
134            StringBuffer sb = new StringBuffer( 1000 );
135            sb.append( "<LayerFeatureConstraints>" );
136            for ( int i = 0; i < featureTypeConstraint.size(); i++ ) {
137                sb.append( ( (Marshallable) featureTypeConstraint.get( i ) ).exportAsXML() );
138            }
139            sb.append( "</LayerFeatureConstraints>" );
140    
141            return sb.toString();
142        }
143    
144    }