001 //$HeadURL: https://sushibar/svn/deegree/base/trunk/resources/eclipse/svn_classfile_header_template.xml $
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
037 package org.deegree.graphics.sld;
038
039 import java.util.Iterator;
040 import java.util.LinkedList;
041
042 import org.deegree.framework.log.ILogger;
043 import org.deegree.framework.log.LoggerFactory;
044 import org.deegree.graphics.sld.SLDFactory.ThresholdsBelongTo;
045 import org.deegree.model.filterencoding.FilterEvaluationException;
046
047 /**
048 * <code>Categorize</code> encapsulates data from a categorize element in a RasterSymbolizer.
049 *
050 * @author <a href="mailto:schmitz@lat-lon.de">Andreas Schmitz</a>
051 * @author last edited by: $Author:$
052 *
053 * @version $Revision:$, $Date:$
054 */
055 public class Categorize {
056
057 private static final ILogger LOG = LoggerFactory.getLogger( Categorize.class );
058
059 // private String fallbackValue;
060
061 private LinkedList<Float> thresholds;
062
063 private LinkedList<Long> values;
064
065 private LinkedList<Boolean> opacities;
066
067 private ThresholdsBelongTo thresholdsBelongTo;
068
069 /**
070 *
071 */
072 public Categorize() {
073 // this.fallbackValue = fallbackValue;
074 }
075
076 /**
077 * @param thresholds
078 */
079 public void setThresholds( LinkedList<ParameterValueType> thresholds ) {
080 this.thresholds = new LinkedList<Float>();
081 for ( ParameterValueType pvt : thresholds ) {
082 try {
083 this.thresholds.add( Float.valueOf( ( pvt.evaluate( null ) ) ) );
084 } catch ( NumberFormatException e ) {
085 LOG.logError( "A number in a threshold value of a RasterSymbolizer could not be parsed.", e );
086 } catch ( FilterEvaluationException e ) {
087 LOG.logError( "A threshold value could not be parsed in a RasterSymbolizer.", e );
088 }
089 }
090 }
091
092 /**
093 * @param values
094 */
095 public void setValues( LinkedList<ParameterValueType> values ) {
096 this.values = new LinkedList<Long>();
097 opacities = new LinkedList<Boolean>();
098
099 for ( ParameterValueType pvt : values ) {
100 try {
101 String s = pvt.evaluate( null );
102 this.values.add( Long.valueOf( s.substring( 1 ), 16 ) );
103 opacities.add( new Boolean( s.length() > 7 ) );
104 } catch ( FilterEvaluationException e ) {
105 LOG.logError( "A color value could not be parsed in a RasterSymbolizer.", e );
106 }
107 }
108 }
109
110 /**
111 * @param thresholdsBelongTo
112 */
113 public void setThresholdsBelongTo( ThresholdsBelongTo thresholdsBelongTo ) {
114 this.thresholdsBelongTo = thresholdsBelongTo;
115 }
116
117 /**
118 * @param val
119 * @param opacity
120 * the opacity to use if none has been set for the value
121 * @return a categorized value
122 */
123 public int categorize( float val, int opacity ) {
124 Iterator<Float> ts = thresholds.iterator();
125 Iterator<Long> vs = values.iterator();
126 Iterator<Boolean> os = opacities.iterator();
127
128 // hope this is interpreted correctly.
129 // preceding: value is classified to our value, if value is >= threshold
130 // succeeding: value is classified to our value, if value is > threshold
131 boolean preceding = thresholdsBelongTo == SLDFactory.ThresholdsBelongTo.PRECEDING;
132
133 float threshold = ts.next().floatValue();
134
135 while ( ( preceding ? ( threshold < val ) : ( threshold <= val ) ) && ts.hasNext() ) {
136 threshold = ts.next().floatValue();
137 vs.next();
138 os.next();
139 }
140
141 int res = vs.next().intValue();
142 if ( os.next().booleanValue() ) {
143 return res;
144 }
145 return res | opacity;
146 }
147 }