001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/graphics/sld/Stroke.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 static java.awt.Color.decode;
039 import static org.deegree.framework.log.LoggerFactory.getLogger;
040
041 import java.awt.Color;
042 import java.util.HashMap;
043 import java.util.StringTokenizer;
044
045 import org.deegree.framework.log.ILogger;
046 import org.deegree.framework.util.ColorUtils;
047 import org.deegree.framework.xml.Marshallable;
048 import org.deegree.model.feature.Feature;
049 import org.deegree.model.filterencoding.Expression;
050 import org.deegree.model.filterencoding.FilterEvaluationException;
051
052 /**
053 * A Stroke allows a string of line segments (or any linear geometry) to be rendered. There are three basic types of
054 * strokes: solid Color, GraphicFill (stipple), and repeated GraphicStroke. A repeated graphic is plotted linearly and
055 * has its graphic symbol bended around the curves of the line string. The default is a solid black line (Color
056 * "#000000").
057 * <p>
058 * The supported CSS-Parameter names are:
059 * <ul>
060 * <li>stroke (color)
061 * <li>stroke-opacity
062 * <li>stroke-width
063 * <li>stroke-linejoin
064 * <li>stroke-linecap
065 * <li>stroke-dasharray
066 * <li>stroke-dashoffset
067 * <p>
068 *
069 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
070 * @author <a href="mailto:mschneider@lat-lon.de">Markus Schneider</a>
071 * @version $Revision: 18328 $ $Date: 2009-07-06 16:00:35 +0200 (Mo, 06. Jul 2009) $
072 */
073
074 public class Stroke extends Drawing implements Marshallable {
075
076 private static final ILogger LOG = getLogger( Stroke.class );
077
078 /**
079 * Wraps the java.awt.BasicStroke.JOIN_MITER constant (why)
080 */
081 public static final int LJ_MITRE = java.awt.BasicStroke.JOIN_MITER;
082
083 /**
084 * Wraps the java.awt.BasicStroke.JOIN_ROUND constant (why)
085 */
086 public static final int LJ_ROUND = java.awt.BasicStroke.JOIN_ROUND;
087
088 /**
089 * Wraps the java.awt.BasicStroke.JOIN_BEVEL constant (why)
090 */
091 public static final int LJ_BEVEL = java.awt.BasicStroke.JOIN_BEVEL;
092
093 /**
094 * Wraps the java.awt.BasicStroke.CAP_BUTT constant (why)
095 */
096 public static final int LC_BUTT = java.awt.BasicStroke.CAP_BUTT;
097
098 /**
099 * Wraps the java.awt.BasicStroke.CAP_ROUND constant (why)
100 */
101 public static final int LC_ROUND = java.awt.BasicStroke.CAP_ROUND;
102
103 /**
104 * Wraps the java.awt.BasicStroke.CAP_SQUARE constant (why)
105 */
106 public static final int LC_SQUARE = java.awt.BasicStroke.CAP_SQUARE;
107
108 // default values
109 /**
110 * Default color is black.
111 */
112 public static final Color COLOR_DEFAULT = Color.BLACK;
113
114 /**
115 * Default opacity is 1
116 */
117 public static final double OPACITY_DEFAULT = 1.0;
118
119 /**
120 * Default with is 1
121 */
122 public static final double WIDTH_DEFAULT = 1.0;
123
124 /**
125 * Default Line join is mitre
126 */
127 public static final int LJ_DEFAULT = LJ_MITRE;
128
129 /**
130 * default line end is butt
131 */
132 public static final int LC_DEFAULT = LC_BUTT;
133
134 private GraphicStroke graphicStroke = null;
135
136 private Color color = null;
137
138 private double smplOpacity = -1;
139
140 private double smplWidth = -1;
141
142 private int smplLineJoin = -1;
143
144 private int smplLineCap = -1;
145
146 private float[] smplDashArray = null;
147
148 private float smplDashOffset = -1;
149
150 /**
151 * Constructs a new <tt>Stroke<tt>.
152 */
153 protected Stroke() {
154 super( new HashMap<String, Object>(), null );
155 }
156
157 /**
158 * Constructs a new <tt>Stroke<tt>. <p>
159 *
160 * @param cssParams
161 * keys are <tt>Strings<tt> (see above), values are <tt>CssParameters</tt>
162 * @param graphicStroke
163 * @param graphicFill
164 */
165 public Stroke( HashMap<String, Object> cssParams, GraphicStroke graphicStroke, GraphicFill graphicFill ) {
166 super( cssParams, graphicFill );
167 this.graphicStroke = graphicStroke;
168 try {
169 extractSimpleColor();
170 } catch ( Exception e ) {
171 LOG.logWarning( "The color could not be parsed as string." );
172 LOG.logDebug( "Stack trace:", e );
173 }
174 try {
175 extractSimpleOpacity();
176 } catch ( Exception e ) {
177 LOG.logWarning( "The opacity could not be parsed as string." );
178 LOG.logDebug( "Stack trace:", e );
179 }
180 try {
181 extractSimpleWidth();
182 } catch ( Exception e ) {
183 LOG.logWarning( "The width could not be parsed as string." );
184 LOG.logDebug( "Stack trace:", e );
185 }
186 try {
187 extractSimpleLineJoin();
188 } catch ( Exception e ) {
189 LOG.logWarning( "The linejoin could not be parsed as string." );
190 LOG.logDebug( "Stack trace:", e );
191 }
192 try {
193 extractSimpleLineCap();
194 } catch ( Exception e ) {
195 LOG.logWarning( "The linecap could not be parsed as string." );
196 LOG.logDebug( "Stack trace:", e );
197 }
198 try {
199 extractSimpleDasharray();
200 } catch ( Exception e ) {
201 LOG.logWarning( "The dasharray could not be parsed as string." );
202 LOG.logDebug( "Stack trace:", e );
203 }
204 try {
205 extractSimpleDashOffset();
206 } catch ( Exception e ) {
207 LOG.logWarning( "The dashoffset could not be parsed as string." );
208 LOG.logDebug( "Stack trace:", e );
209 }
210 }
211
212 /**
213 * extracts the color of the stroke if it is simple (nor Expression) to avoid new calculation for each call of
214 * getStroke(Feature feature)
215 */
216 private void extractSimpleColor()
217 throws FilterEvaluationException {
218 CssParameter cssParam = (CssParameter) cssParams.get( "stroke" );
219 if ( cssParam != null ) {
220 Object[] o = cssParam.getValue().getComponents();
221 for ( int i = 0; i < o.length; i++ ) {
222 if ( o[i] instanceof Expression ) {
223 color = null;
224 break;
225 }
226 try {
227 // trimming the String to avoid parsing errors with newlines
228 String s = o[i].toString().trim();
229 if ( s.equals( "" ) ) {
230 color = decode( s );
231 }
232 } catch ( NumberFormatException e ) {
233 throw new FilterEvaluationException( "Given value ('" + o[i] + "') for CSS-Parameter 'stroke' "
234 + "does not denote a valid color!" );
235 }
236 }
237 }
238 }
239
240 /**
241 * returns true if the passed CssParameter contain a simple value
242 */
243 private boolean isSimple( CssParameter cssParam ) {
244 boolean simple = true;
245 Object[] o = cssParam.getValue().getComponents();
246 for ( int i = 0; i < o.length; i++ ) {
247 if ( o[i] instanceof Expression ) {
248 simple = false;
249 break;
250 }
251 }
252 return simple;
253 }
254
255 /**
256 * extracts the opacity of the stroke if it is simple (no Expression) to avoid new calculation for each call of
257 * getStroke(Feature feature)
258 */
259 private void extractSimpleOpacity()
260 throws FilterEvaluationException {
261 CssParameter cssParam = (CssParameter) cssParams.get( "stroke-opacity" );
262 if ( cssParam != null ) {
263 if ( isSimple( cssParam ) ) {
264 Object[] o = cssParam.getValue().getComponents();
265 try {
266 smplOpacity = Double.parseDouble( (String) o[0] );
267 } catch ( NumberFormatException e ) {
268 throw new FilterEvaluationException( "Given value for parameter 'stroke-opacity' ('" + o[0]
269 + "') has invalid format!" );
270 }
271
272 if ( ( smplOpacity < 0.0 ) || ( smplOpacity > 1.0 ) ) {
273 throw new FilterEvaluationException( "Value for parameter 'stroke-opacity' (given: '" + o[0]
274 + "') must be between 0.0 and 1.0!" );
275 }
276 }
277 }
278 }
279
280 /**
281 * extracts the width of the stroke if it is simple (no Expression) to avoid new calculation for each call of
282 * getStroke(Feature feature)
283 */
284 private void extractSimpleWidth()
285 throws FilterEvaluationException {
286 CssParameter cssParam = (CssParameter) cssParams.get( "stroke-width" );
287 if ( cssParam != null ) {
288 if ( isSimple( cssParam ) ) {
289 Object[] o = cssParam.getValue().getComponents();
290 try {
291 smplWidth = Double.parseDouble( (String) o[0] );
292 } catch ( NumberFormatException e ) {
293 throw new FilterEvaluationException( "Given value for parameter 'stroke-width' ('" + o[0]
294 + "') has invalid format!" );
295 }
296 if ( smplWidth < 0.0 ) {
297 throw new FilterEvaluationException( "Value for parameter 'stroke-width' (given: '" + smplWidth
298 + "') must be > 0.0!" );
299 }
300 }
301 }
302 }
303
304 /**
305 * extracts the line join of the stroke if it is simple (no Expression) to avoid new calculation for each call of
306 * getStroke(Feature feature)
307 */
308 private void extractSimpleLineJoin()
309 throws FilterEvaluationException {
310 CssParameter cssParam = (CssParameter) cssParams.get( "stroke-linejoin" );
311 if ( cssParam != null ) {
312 if ( isSimple( cssParam ) ) {
313 Object[] o = cssParam.getValue().getComponents();
314 String value = (String) o[0];
315 if ( value.equals( "mitre" ) ) {
316 smplLineJoin = Stroke.LJ_MITRE;
317 } else if ( value.equals( "round" ) ) {
318 smplLineJoin = Stroke.LJ_ROUND;
319 } else if ( value.equals( "bevel" ) ) {
320 smplLineJoin = Stroke.LJ_BEVEL;
321 } else {
322 throw new FilterEvaluationException( "Given value for parameter 'stroke-linejoin' ('" + value
323 + "') is unsupported. Supported values are: "
324 + "'mitre', 'round' or 'bevel'!" );
325 }
326 }
327 }
328 }
329
330 /**
331 * extracts the line cap of the stroke if it is simple (no Expression) to avoid new calculation for each call of
332 * getStroke(Feature feature)
333 */
334 private void extractSimpleLineCap()
335 throws FilterEvaluationException {
336 CssParameter cssParam = (CssParameter) cssParams.get( "stroke-linecap" );
337 if ( cssParam != null ) {
338 if ( isSimple( cssParam ) ) {
339 Object[] o = cssParam.getValue().getComponents();
340 String value = (String) o[0];
341 if ( value.equals( "butt" ) ) {
342 smplLineCap = Stroke.LC_BUTT;
343 } else if ( value.equals( "round" ) ) {
344 smplLineCap = Stroke.LC_ROUND;
345 } else if ( value.equals( "square" ) ) {
346 smplLineCap = Stroke.LC_SQUARE;
347 } else {
348 throw new FilterEvaluationException( "Given value for parameter 'stroke-linecap' ('" + value
349 + "') is unsupported. Supported values are: "
350 + "'butt', 'round' or 'square'!" );
351 }
352 }
353 }
354 }
355
356 /**
357 * extracts the dasharray of the stroke if it is simple (no Expression) to avoid new calculation for each call of
358 * getStroke(Feature feature)
359 */
360 private void extractSimpleDasharray()
361 throws FilterEvaluationException {
362 CssParameter cssParam = (CssParameter) cssParams.get( "stroke-dasharray" );
363 if ( cssParam != null ) {
364 if ( isSimple( cssParam ) ) {
365 Object[] o = cssParam.getValue().getComponents();
366 String value = (String) o[0];
367 StringTokenizer st = new StringTokenizer( value, ",; " );
368 int count = st.countTokens();
369 float[] dashArray;
370
371 if ( ( count % 2 ) == 0 ) {
372 dashArray = new float[count];
373 } else {
374 dashArray = new float[count * 2];
375 }
376
377 int k = 0;
378 while ( st.hasMoreTokens() ) {
379 String s = st.nextToken();
380 try {
381 dashArray[k++] = Float.parseFloat( s );
382 } catch ( NumberFormatException e ) {
383 throw new FilterEvaluationException( "List of values for parameter 'stroke-dashoffset' "
384 + "contains an invalid token: '" + s + "'!" );
385 }
386 }
387
388 // odd number of values -> the pattern must be repeated twice
389 if ( ( count % 2 ) == 1 ) {
390 int j = 0;
391 while ( k < ( ( count * 2 ) - 1 ) ) {
392 dashArray[k++] = dashArray[j++];
393 }
394 }
395 smplDashArray = dashArray;
396 }
397 }
398 }
399
400 /**
401 * extracts the dash offset of the stroke if it is simple (no Expression) to avoid new calculation for each call of
402 * getStroke(Feature feature)
403 */
404 private void extractSimpleDashOffset()
405 throws FilterEvaluationException {
406 CssParameter cssParam = (CssParameter) cssParams.get( "stroke-dashoffset" );
407 if ( cssParam != null ) {
408 if ( isSimple( cssParam ) ) {
409 Object[] o = cssParam.getValue().getComponents();
410 String value = (String) o[0];
411 try {
412 smplDashOffset = Float.parseFloat( value );
413 } catch ( NumberFormatException e ) {
414 throw new FilterEvaluationException( "Given value for parameter 'stroke-dashoffset' ('" + value
415 + "') has invalid format!" );
416 }
417 }
418 }
419 }
420
421 /**
422 * The GraphicStroke element both indicates that a repeated-linear-graphic stroke type will be used.
423 * <p>
424 *
425 * @return the underlying <tt>GraphicStroke</tt> instance (may be null)
426 *
427 */
428 public GraphicStroke getGraphicStroke() {
429 return graphicStroke;
430 }
431
432 /**
433 * The GraphicStroke element both indicates that a repeated-linear-graphic stroke type will be used.
434 *
435 * @param graphicStroke
436 * the graphicStroke element
437 * <p>
438 *
439 */
440 public void setGraphicStroke( GraphicStroke graphicStroke ) {
441 this.graphicStroke = graphicStroke;
442 }
443
444 /**
445 * The stroke CssParameter element gives the solid color that will be used for a stroke. The color value is
446 * RGB-encoded using two hexadecimal digits per primary-color component, in the order Red, Green, Blue, prefixed
447 * with a hash (#) sign. The hexadecimal digits between A and F may be in either uppercase or lowercase. For
448 * example, full red is encoded as #ff0000 (with no quotation marks). The default color is defined to be black
449 * (#000000) in the context of the LineSymbolizer, if the stroke CssParameter element is absent.
450 * <p>
451 *
452 * @param feature
453 * specifies the <tt>Feature</tt> to be used for evaluation of the underlying 'sld:ParameterValueType'
454 * @return the (evaluated) value of the parameter
455 * @throws FilterEvaluationException
456 * if the evaluation fails
457 */
458 public Color getStroke( Feature feature )
459 throws FilterEvaluationException {
460 Color awtColor = COLOR_DEFAULT;
461
462 if ( color == null ) {
463 // evaluate color depending on the passed feature's properties
464 CssParameter cssParam = (CssParameter) cssParams.get( "stroke" );
465
466 if ( cssParam != null ) {
467 String s = cssParam.getValue( feature );
468
469 try {
470 awtColor = Color.decode( s );
471 } catch ( NumberFormatException e ) {
472 throw new FilterEvaluationException( "Given value ('" + s + "') for CSS-Parameter 'stroke' "
473 + "does not denote a valid color!" );
474 }
475 }
476 } else {
477 awtColor = color;
478 }
479
480 return awtColor;
481 }
482
483 /**
484 * @see org.deegree.graphics.sld.Stroke#getStroke(Feature) <p>
485 * @param stroke
486 * the stroke to be set
487 */
488 public void setStroke( Color stroke ) {
489 this.color = stroke;
490 CssParameter strokeColor = StyleFactory.createCssParameter( "stroke", ColorUtils.toHexCode( "#", stroke ) );
491 cssParams.put( "stroke", strokeColor );
492 }
493
494 /**
495 * The stroke-opacity CssParameter element specifies the level of translucency to use when rendering the stroke. The
496 * value is encoded as a floating-point value (float) between 0.0 and 1.0 with 0.0 representing completely
497 * transparent and 1.0 representing completely opaque, with a linear scale of translucency for intermediate values.
498 * For example, 0.65 would represent 65% opacity. The default value is 1.0 (opaque).
499 * <p>
500 *
501 * @param feature
502 * specifies the <tt>Feature</tt> to be used for evaluation of the underlying 'sld:ParameterValueType'
503 * @return the (evaluated) value of the parameter
504 * @throws FilterEvaluationException
505 * if the evaluation fails
506 */
507 public double getOpacity( Feature feature )
508 throws FilterEvaluationException {
509 double opacity = OPACITY_DEFAULT;
510
511 if ( smplOpacity < 0 ) {
512 CssParameter cssParam = (CssParameter) cssParams.get( "stroke-opacity" );
513
514 if ( cssParam != null ) {
515 // evaluate opacity depending on the passed feature's properties
516 String value = cssParam.getValue( feature );
517
518 try {
519 opacity = Double.parseDouble( value );
520 } catch ( NumberFormatException e ) {
521 throw new FilterEvaluationException( "Given value for parameter 'stroke-opacity' ('" + value
522 + "') has invalid format!" );
523 }
524
525 if ( ( opacity < 0.0 ) || ( opacity > 1.0 ) ) {
526 throw new FilterEvaluationException( "Value for parameter 'stroke-opacity' (given: '" + value
527 + "') must be between 0.0 and 1.0!" );
528 }
529 }
530 } else {
531 opacity = smplOpacity;
532 }
533
534 return opacity;
535 }
536
537 /**
538 * @see org.deegree.graphics.sld.Stroke#getOpacity(Feature) <p>
539 * @param opacity
540 * the opacity to be set for the stroke
541 */
542 public void setOpacity( double opacity ) {
543 if ( opacity > 1 ) {
544 opacity = 1;
545 } else if ( opacity < 0 ) {
546 opacity = 0;
547 }
548 this.smplOpacity = opacity;
549 CssParameter strokeOp = StyleFactory.createCssParameter( "stroke-opacity", "" + opacity );
550 cssParams.put( "stroke-opacity", strokeOp );
551 }
552
553 /**
554 * The stroke-width CssParameter element gives the absolute width (thickness) of a stroke in pixels encoded as a
555 * float. (Arguably, more units could be provided for encoding sizes, such as millimeters or typesetter's points.)
556 * The default is 1.0. Fractional numbers are allowed (with a system-dependent interpretation) but negative numbers
557 * are not.
558 * <p>
559 *
560 * @param feature
561 * specifies the <tt>Feature</tt> to be used for evaluation of the underlying 'sld:ParameterValueType'
562 * @return the (evaluated) value of the parameter
563 * @throws FilterEvaluationException
564 * if the evaluation fails
565 */
566 public double getWidth( Feature feature )
567 throws FilterEvaluationException {
568 double width = WIDTH_DEFAULT;
569
570 if ( smplWidth < 0 ) {
571 // evaluate smplWidth depending on the passed feature's properties
572 CssParameter cssParam = (CssParameter) cssParams.get( "stroke-width" );
573
574 if ( cssParam != null ) {
575 String value = cssParam.getValue( feature );
576
577 try {
578 width = Double.parseDouble( value );
579 } catch ( NumberFormatException e ) {
580 throw new FilterEvaluationException( "Given value for parameter 'stroke-width' ('" + value
581 + "') has invalid format!" );
582 }
583
584 if ( width <= 0.0 ) {
585 throw new FilterEvaluationException( "Value for parameter 'stroke-width' (given: '" + value
586 + "') must be greater than 0!" );
587 }
588 }
589 } else {
590 width = smplWidth;
591 }
592
593 return width;
594 }
595
596 /**
597 * @see org.deegree.graphics.sld.Stroke#getWidth(Feature) <p>
598 * @param width
599 * the width to be set for the stroke
600 */
601 public void setWidth( double width ) {
602 if ( width <= 0 )
603 width = 1;
604 this.smplWidth = width;
605 CssParameter strokeWi = StyleFactory.createCssParameter( "stroke-width", "" + width );
606 cssParams.put( "stroke-width", strokeWi );
607 }
608
609 /**
610 * The stroke-linejoin CssParameter element encode enumerated values telling how line strings should be joined
611 * (between line segments). The values are represented as content strings. The allowed values for line join are
612 * mitre, round, and bevel.
613 * <p>
614 *
615 * @param feature
616 * specifies the <tt>Feature</tt> to be used for evaluation of the underlying 'sld:ParameterValueType'
617 * @return the (evaluated) value of the parameter
618 * @throws FilterEvaluationException
619 * if the evaluation fails
620 */
621 public int getLineJoin( Feature feature )
622 throws FilterEvaluationException {
623 int lineJoin = LJ_DEFAULT;
624
625 if ( smplLineJoin < 0 ) {
626 CssParameter cssParam = (CssParameter) cssParams.get( "stroke-linejoin" );
627
628 if ( cssParam != null ) {
629 String value = cssParam.getValue( feature );
630
631 if ( value.equals( "mitre" ) ) {
632 lineJoin = Stroke.LJ_MITRE;
633 } else if ( value.equals( "round" ) ) {
634 lineJoin = Stroke.LJ_ROUND;
635 } else if ( value.equals( "bevel" ) ) {
636 lineJoin = Stroke.LJ_BEVEL;
637 } else {
638 throw new FilterEvaluationException( "Given value for parameter 'stroke-linejoin' ('" + value
639 + "') is unsupported. Supported values are: "
640 + "'mitre', 'round' or 'bevel'!" );
641 }
642 }
643 } else {
644 lineJoin = smplLineJoin;
645 }
646
647 return lineJoin;
648 }
649
650 /**
651 * @see org.deegree.graphics.sld.Stroke#getLineJoin(Feature) <p>
652 * @param lineJoin
653 * the lineJoin to be set for the stroke
654 */
655 public void setLineJoin( int lineJoin ) {
656 String join = null;
657 if ( lineJoin == Stroke.LJ_MITRE ) {
658 join = "mitre";
659 } else if ( lineJoin == Stroke.LJ_ROUND ) {
660 join = "round";
661 } else if ( lineJoin == Stroke.LJ_BEVEL ) {
662 join = "bevel";
663 } else {
664 // default
665 lineJoin = Stroke.LJ_BEVEL;
666 join = "bevel";
667 }
668 smplLineJoin = lineJoin;
669 CssParameter strokeLJ = StyleFactory.createCssParameter( "stroke-linejoin", join );
670 cssParams.put( "stroke-linejoin", strokeLJ );
671 }
672
673 /**
674 * Thestroke-linecap CssParameter element encode enumerated values telling how line strings should be capped (at the
675 * two ends of the line string). The values are represented as content strings. The allowed values for line cap are
676 * butt, round, and square. The default values are system-dependent.
677 * <p>
678 *
679 * @param feature
680 * specifies the <tt>Feature</tt> to be used for evaluation of the underlying 'sld:ParameterValueType'
681 * @return the (evaluated) value of the parameter
682 * @throws FilterEvaluationException
683 * if the evaluation fails
684 */
685 public int getLineCap( Feature feature )
686 throws FilterEvaluationException {
687 int lineCap = LC_DEFAULT;
688
689 if ( smplLineCap < 0 ) {
690
691 CssParameter cssParam = (CssParameter) cssParams.get( "stroke-linecap" );
692
693 if ( cssParam != null ) {
694 String value = cssParam.getValue( feature );
695
696 if ( value.equals( "butt" ) ) {
697 lineCap = Stroke.LC_BUTT;
698 } else if ( value.equals( "round" ) ) {
699 lineCap = Stroke.LC_ROUND;
700 } else if ( value.equals( "square" ) ) {
701 lineCap = Stroke.LC_SQUARE;
702 } else {
703 throw new FilterEvaluationException( "Given value for parameter 'stroke-linecap' ('" + value
704 + "') is unsupported. Supported values are: "
705 + "'butt', 'round' or 'square'!" );
706 }
707 }
708 } else {
709 lineCap = smplLineCap;
710 }
711
712 return lineCap;
713 }
714
715 /**
716 * @see org.deegree.graphics.sld.Stroke#getLineCap(Feature) <p>
717 * @param lineCap
718 * lineCap to be set for the stroke
719 */
720 public void setLineCap( int lineCap ) {
721 String cap = null;
722 if ( lineCap == Stroke.LC_BUTT ) {
723 cap = "butt";
724 } else if ( lineCap == Stroke.LC_ROUND ) {
725 cap = "round";
726 } else if ( lineCap == Stroke.LC_SQUARE ) {
727 cap = "square";
728 } else {
729 // default;
730 cap = "round";
731 lineCap = Stroke.LC_SQUARE;
732 }
733 smplLineCap = lineCap;
734 CssParameter strokeCap = StyleFactory.createCssParameter( "stroke-linecap", cap );
735 cssParams.put( "stroke-linecap", strokeCap );
736 }
737
738 /**
739 * Evaluates the 'stroke-dasharray' parameter as defined in OGC 02-070. The stroke-dasharray CssParameter element
740 * encodes a dash pattern as a series of space separated floats. The first number gives the length in pixels of dash
741 * to draw, the second gives the amount of space to leave, and this pattern repeats. If an odd number of values is
742 * given, then the pattern is expanded by repeating it twice to give an even number of values. Decimal values have a
743 * system-dependent interpretation (usually depending on whether antialiasing is being used). The default is to draw
744 * an unbroken line.
745 * <p>
746 *
747 * @param feature
748 * the encoded pattern
749 * @throws FilterEvaluationException
750 * if the eevaluation fails or the encoded pattern is erroneous
751 * @return the decoded pattern as an array of float-values (null if the parameter was not specified)
752 */
753 public float[] getDashArray( Feature feature )
754 throws FilterEvaluationException {
755 CssParameter cssParam = (CssParameter) cssParams.get( "stroke-dasharray" );
756
757 float[] dashArray = null;
758 if ( smplDashArray == null ) {
759 if ( cssParam == null ) {
760 return null;
761 }
762
763 String value = cssParam.getValue( feature );
764
765 StringTokenizer st = new StringTokenizer( value, ",; " );
766 int count = st.countTokens();
767
768 if ( ( count % 2 ) == 0 ) {
769 dashArray = new float[count];
770 } else {
771 dashArray = new float[count * 2];
772 }
773
774 int i = 0;
775 while ( st.hasMoreTokens() ) {
776 String s = st.nextToken();
777 try {
778 dashArray[i++] = Float.parseFloat( s );
779 } catch ( NumberFormatException e ) {
780 throw new FilterEvaluationException( "List of values for parameter 'stroke-dashoffset' "
781 + "contains an invalid token: '" + s + "'!" );
782 }
783 }
784
785 // odd number of values -> the pattern must be repeated twice
786 if ( ( count % 2 ) == 1 ) {
787 int j = 0;
788 while ( i < ( ( count * 2 ) - 1 ) ) {
789 dashArray[i++] = dashArray[j++];
790 }
791 }
792 } else {
793 dashArray = smplDashArray;
794 }
795
796 return dashArray;
797 }
798
799 /**
800 * @see org.deegree.graphics.sld.Stroke#getDashArray(Feature) <p>
801 * @param dashArray
802 * the dashArray to be set for the Stroke
803 */
804 public void setDashArray( float[] dashArray ) {
805 if ( dashArray != null ) {
806 String s = "";
807 for ( int i = 0; i < dashArray.length - 1; i++ ) {
808 s = s + dashArray[i] + ",";
809 }
810 s = s + dashArray[dashArray.length - 1];
811 smplDashArray = dashArray;
812 CssParameter strokeDash = StyleFactory.createCssParameter( "stroke-dasharray", s );
813 cssParams.put( "stroke-dasharray", strokeDash );
814 }
815 }
816
817 /**
818 * The stroke-dashoffset CssParameter element specifies the distance as a float into the stroke-dasharray pattern at
819 * which to start drawing.
820 * <p>
821 *
822 * @param feature
823 * specifies the <tt>Feature</tt> to be used for evaluation of the underlying 'sld:ParameterValueType'
824 * @return the (evaluated) value of the parameter
825 * @throws FilterEvaluationException
826 * if the evaluation fails
827 */
828 public float getDashOffset( Feature feature )
829 throws FilterEvaluationException {
830 float dashOffset = 0;
831
832 if ( smplDashOffset < 0 ) {
833 CssParameter cssParam = (CssParameter) cssParams.get( "stroke-dashoffset" );
834 if ( cssParam != null ) {
835 String value = cssParam.getValue( feature );
836
837 try {
838 dashOffset = Float.parseFloat( value );
839 } catch ( NumberFormatException e ) {
840 throw new FilterEvaluationException( "Given value for parameter 'stroke-dashoffset' ('" + value
841 + "') has invalid format!" );
842 }
843 }
844 } else {
845 dashOffset = smplDashOffset;
846 }
847
848 return dashOffset;
849 }
850
851 /**
852 * The stroke-dashoffset CssParameter element specifies the distance as a float into the stroke-dasharray pattern at
853 * which to start drawing.
854 * <p>
855 *
856 * @param dashOffset
857 * the dashOffset to be set for the Stroke
858 */
859 public void setDashOffset( float dashOffset ) {
860 if ( dashOffset < 0 )
861 dashOffset = 0;
862 smplDashOffset = dashOffset;
863 CssParameter strokeDashOff = StyleFactory.createCssParameter( "stroke-dashoffset", "" + dashOffset );
864 cssParams.put( "stroke-dashoffset", strokeDashOff );
865 }
866
867 /**
868 * exports the content of the Stroke as XML formated String
869 *
870 * @return xml representation of the Stroke
871 */
872 public String exportAsXML() {
873
874 StringBuffer sb = new StringBuffer( 1000 );
875 sb.append( "<Stroke>" );
876
877 if ( graphicFill != null ) {
878 sb.append( ( (Marshallable) graphicFill ).exportAsXML() );
879 } else if ( graphicStroke != null ) {
880 sb.append( ( (Marshallable) graphicStroke ).exportAsXML() );
881 }
882 for ( Object o : cssParams.values() ) {
883 sb.append( ( (Marshallable) o ).exportAsXML() );
884 }
885
886 sb.append( "</Stroke>" );
887
888 return sb.toString();
889 }
890
891 }