/**
* Get the java2D Stroke for the given feature.
*
* @param candidate : evaluate stroke with the given feature
* @param coeff : use to adjust stroke size, if in display unit value equals 1
* @return Java2D Stroke
*/
public java.awt.Stroke getJ2DStroke(final Object candidate, float coeff) {
evaluate();
coeff = Math.abs(coeff);
java.awt.Stroke j2dStroke = cachedStroke;
// if stroke is null it means something is dynamic
if (j2dStroke == null || coeff != 1) {
float[] candidateDashes = cachedDashes;
float candidateOffset = cachedDashOffset;
int candidateCap = cachedCap;
int candidateJoin = cachedJoin;
float candidateWidth = cachedWidth;
if (Float.isNaN(candidateOffset)) {
final Expression expOffset = styleElement.getDashOffset();
candidateOffset = GO2Utilities.evaluate(expOffset, candidate, Float.class, 1f);
}
if (candidateCap == Integer.MAX_VALUE) {
final Expression expCap = styleElement.getLineCap();
final String cap =
GO2Utilities.evaluate(expCap, null, String.class, STROKE_CAP_BUTT_STRING);
if (STROKE_CAP_BUTT_STRING.equalsIgnoreCase(cap)) candidateCap = BasicStroke.CAP_BUTT;
else if (STROKE_CAP_SQUARE_STRING.equalsIgnoreCase(cap))
candidateCap = BasicStroke.CAP_SQUARE;
else if (STROKE_CAP_ROUND_STRING.equalsIgnoreCase(cap))
candidateCap = BasicStroke.CAP_ROUND;
else candidateCap = BasicStroke.CAP_BUTT;
}
if (candidateJoin == Integer.MAX_VALUE) {
final Expression expJoin = styleElement.getLineJoin();
final String join =
GO2Utilities.evaluate(expJoin, null, String.class, STROKE_JOIN_BEVEL_STRING);
if (STROKE_JOIN_BEVEL_STRING.equalsIgnoreCase(join)) candidateJoin = BasicStroke.JOIN_BEVEL;
else if (STROKE_JOIN_MITRE_STRING.equalsIgnoreCase(join))
candidateJoin = BasicStroke.JOIN_MITER;
else if (STROKE_JOIN_ROUND_STRING.equalsIgnoreCase(join))
candidateJoin = BasicStroke.JOIN_ROUND;
else candidateJoin = BasicStroke.JOIN_BEVEL;
}
if (Float.isNaN(candidateWidth)) {
final Expression expWidth = styleElement.getWidth();
candidateWidth = GO2Utilities.evaluate(expWidth, candidate, Float.class, 1f);
if (candidateWidth < 0) {
candidateWidth = 0f;
}
}
if (candidateDashes != null) {
float[] s = candidateDashes.clone();
for (int i = 0; i < s.length; i++) {
s[i] = s[i] * coeff;
}
j2dStroke =
new BasicStroke(
candidateWidth * coeff, candidateCap, candidateJoin, 1f, s, candidateOffset);
} else {
j2dStroke = new BasicStroke(candidateWidth * coeff, candidateCap, candidateJoin, 10f);
}
}
return j2dStroke;
}
private boolean evaluateStroke() {
final float[] dashArray = styleElement.getDashArray();
final Expression expOffset = styleElement.getDashOffset();
final Expression expLineCap = styleElement.getLineCap();
final Expression expLineJoin = styleElement.getLineJoin();
final Expression expWidth = styleElement.getWidth();
boolean strokeStatic = true;
float[] candidateDashes = null;
float candidateOffset = Float.NaN;
int candidateCap = -1;
int candidateJoin = -1;
float candidateWidth = Float.NaN;
candidateDashes = GO2Utilities.validDashes(dashArray);
// offset ----------------------------------------------
if (GO2Utilities.isStatic(expOffset)) {
candidateOffset = GO2Utilities.evaluate(expOffset, null, Float.class, 1f);
} else {
strokeStatic = false;
GO2Utilities.getRequieredAttributsName(expOffset, requieredAttributs);
}
// line width ------------------------------------------
if (GO2Utilities.isStatic(expWidth)) {
candidateWidth = GO2Utilities.evaluate(expWidth, null, Float.class, 1f);
// we return false, width is 0 no need to cache or draw anything
if (candidateWidth == 0) {
isStaticVisible = VisibilityState.UNVISIBLE;
return false;
}
// this style is visible
if (isStaticVisible == VisibilityState.NOT_DEFINED) isStaticVisible = VisibilityState.VISIBLE;
} else {
// this style visibility is dynamic
if (isStaticVisible != VisibilityState.UNVISIBLE) isStaticVisible = VisibilityState.DYNAMIC;
strokeStatic = false;
GO2Utilities.getRequieredAttributsName(expWidth, requieredAttributs);
}
// line cap and join---------------------------------------------
if (cachedWidth <= 2.5f) {
// line cap and join are invisible under this size
candidateCap = BasicStroke.CAP_SQUARE;
candidateJoin = BasicStroke.JOIN_MITER;
} else {
if (GO2Utilities.isStatic(expLineCap)) {
final String cap =
GO2Utilities.evaluate(expLineCap, null, String.class, STROKE_CAP_BUTT_STRING);
if (STROKE_CAP_BUTT_STRING.equalsIgnoreCase(cap)) candidateCap = BasicStroke.CAP_BUTT;
else if (STROKE_CAP_SQUARE_STRING.equalsIgnoreCase(cap))
candidateCap = BasicStroke.CAP_SQUARE;
else if (STROKE_CAP_ROUND_STRING.equalsIgnoreCase(cap))
candidateCap = BasicStroke.CAP_ROUND;
else candidateCap = BasicStroke.CAP_BUTT;
} else {
strokeStatic = false;
GO2Utilities.getRequieredAttributsName(expLineCap, requieredAttributs);
}
if (GO2Utilities.isStatic(expLineJoin)) {
final String join =
GO2Utilities.evaluate(expLineJoin, null, String.class, STROKE_JOIN_BEVEL_STRING);
if (STROKE_JOIN_BEVEL_STRING.equalsIgnoreCase(join)) candidateJoin = BasicStroke.JOIN_BEVEL;
else if (STROKE_JOIN_MITRE_STRING.equalsIgnoreCase(join))
candidateJoin = BasicStroke.JOIN_MITER;
else if (STROKE_JOIN_ROUND_STRING.equalsIgnoreCase(join))
candidateJoin = BasicStroke.JOIN_ROUND;
else candidateJoin = BasicStroke.JOIN_BEVEL;
} else {
strokeStatic = false;
GO2Utilities.getRequieredAttributsName(expLineJoin, requieredAttributs);
}
}
// we cache each possible expression ------------------------------
this.cachedDashes = candidateDashes;
if (!Float.isNaN(candidateOffset))
cachedDashOffset = (candidateOffset > 0) ? candidateOffset : 0;
if (candidateCap != -1) cachedCap = candidateCap;
if (candidateJoin != -1) cachedJoin = candidateJoin;
if (!Float.isNaN(candidateWidth)) {
cachedWidth = candidateWidth;
if (cachedWidth < 0) cachedWidth = 0f;
}
// if static we can can cache the stroke directly----------------------
if (strokeStatic) {
// we can never cache the java2d stroke seens it's size depend on the symbolizer unit of
// mesure
if (cachedDashes != null) {
cachedStroke =
new BasicStroke(
candidateWidth, candidateCap, candidateJoin, 10f, cachedDashes, cachedDashOffset);
} else {
cachedStroke = new BasicStroke(candidateWidth, candidateCap, candidateJoin, 10f);
}
} else {
this.isStatic = false;
}
return true;
}