001    //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/portal/context/StyleList.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.portal.context;
037    
038    import java.util.HashMap;
039    
040    /**
041     * encapsulates a StyleList as defined by the OGC Web Map Context specification
042     *
043     * @version $Revision: 18195 $
044     * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
045     */
046    public class StyleList {
047        private HashMap<String, Style> styles = new HashMap<String, Style>();
048    
049        private Style current = null;
050    
051        /**
052         * Creates a new StyleList object.
053         *
054         * @param styles
055         * @throws ContextException if the given styles are <code>null</code> or empty.
056         */
057        public StyleList( Style[] styles ) throws ContextException {
058            setStyles( styles );
059        }
060    
061        /**
062         * returns an array of all styles known by a layer
063         *
064         * @return all styles
065         */
066        public Style[] getStyles() {
067            Style[] fr = new Style[styles.size()];
068            return styles.values().toArray( fr );
069        }
070    
071        /**
072         * sets alla styles known by a layer
073         *
074         * @param styles
075         *
076         * @throws ContextException
077         */
078        public void setStyles( Style[] styles )
079                                throws ContextException {
080            if ( ( styles == null ) || ( styles.length == 0 ) ) {
081                throw new ContextException( "at least one style must be defined for a layer" );
082            }
083    
084            this.styles.clear();
085    
086            for ( int i = 0; i < styles.length; i++ ) {
087                if ( styles[i].isCurrent() ) {
088                    current = styles[i];
089                }
090                this.styles.put( styles[i].getName(), styles[i] );
091            }
092        }
093    
094        /**
095         * returns the current style
096         *
097         * @return current style
098         */
099        public Style getCurrentStyle() {
100            return current;
101        }
102    
103        /**
104         *
105         *
106         * @param name
107         *
108         * @return named style
109         */
110        public Style getStyle( String name ) {
111            return styles.get( name );
112        }
113    
114        /**
115         *
116         *
117         * @param style
118         */
119        public void addStyle( Style style ) {
120            if ( style.isCurrent() ) {
121                current.setCurrent( false );
122                current = style;
123            }
124            styles.put( style.getName(), style );
125        }
126    
127        /**
128         *
129         *
130         * @param name
131         *
132         * @return removed style
133         */
134        public Style removeStyle( String name ) {
135            return styles.remove( name );
136        }
137    
138        /**
139         *
140         */
141        public void clear() {
142            styles.clear();
143        }
144    
145    }