X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=gis%2Fruntime%2Forg.argeo.gis.geotools%2Fsrc%2Fmain%2Fjava%2Forg%2Fargeo%2Fgeotools%2Fstyling%2FStylingUtils.java;fp=gis%2Fruntime%2Forg.argeo.gis.geotools%2Fsrc%2Fmain%2Fjava%2Forg%2Fargeo%2Fgeotools%2Fstyling%2FStylingUtils.java;h=a4811ac8763466971f60115009e8c9024ff34700;hb=7725ae1388fb3b0ff5721566bf2e9e6c4b957675;hp=0000000000000000000000000000000000000000;hpb=00ec568367442bfb51e506e73d3b9e8bd7798a1c;p=lgpl%2Fargeo-commons.git

diff --git a/gis/runtime/org.argeo.gis.geotools/src/main/java/org/argeo/geotools/styling/StylingUtils.java b/gis/runtime/org.argeo.gis.geotools/src/main/java/org/argeo/geotools/styling/StylingUtils.java
new file mode 100644
index 000000000..a4811ac87
--- /dev/null
+++ b/gis/runtime/org.argeo.gis.geotools/src/main/java/org/argeo/geotools/styling/StylingUtils.java
@@ -0,0 +1,103 @@
+package org.argeo.geotools.styling;
+
+import java.awt.Color;
+
+import org.argeo.ArgeoException;
+import org.geotools.factory.CommonFactoryFinder;
+import org.geotools.filter.text.cql2.CQL;
+import org.geotools.filter.text.cql2.CQLException;
+import org.geotools.styling.FeatureTypeStyle;
+import org.geotools.styling.LineSymbolizer;
+import org.geotools.styling.Rule;
+import org.geotools.styling.Stroke;
+import org.geotools.styling.Style;
+import org.geotools.styling.StyleFactory;
+import org.opengis.filter.Filter;
+import org.opengis.filter.FilterFactory;
+
+/** Utilities related to GeoTools styling */
+public class StylingUtils {
+	static StyleFactory styleFactory = CommonFactoryFinder
+			.getStyleFactory(null);
+	static FilterFactory filterFactory = CommonFactoryFinder
+			.getFilterFactory(null);
+
+	/**
+	 * Style for a line
+	 * 
+	 * @param color
+	 *            the AWT color in upper case
+	 * @param width
+	 *            the width of the line
+	 * @param cqlFilter
+	 *            filter in CQL formqt restricting the feqture upon which the
+	 *            style will apply
+	 */
+	public static Style createLineStyle(String color, Integer width) {
+		Rule rule = styleFactory.createRule();
+		rule.symbolizers().add(createLineSymbolizer(color, width));
+		FeatureTypeStyle fts = styleFactory
+				.createFeatureTypeStyle(new Rule[] { rule });
+		Style style = styleFactory.createStyle();
+		style.featureTypeStyles().add(fts);
+		return style;
+	}
+
+	public static Style createFilteredLineStyle(String cqlFilter,
+			String matchedColor, Integer matchedWidth, String unmatchedColor,
+			Integer unmatchedWidth) {
+		// selection filter
+		Filter filter;
+		try {
+			filter = CQL.toFilter(cqlFilter);
+		} catch (CQLException e) {
+			throw new ArgeoException("Cannot parse CQL filter: " + cqlFilter, e);
+		}
+
+		Rule[] rules;
+		// matched
+		Rule ruleMatched = styleFactory.createRule();
+		ruleMatched.symbolizers().add(
+				createLineSymbolizer(matchedColor, matchedWidth));
+		ruleMatched.setFilter(filter);
+
+		// unmatched
+		if (unmatchedColor != null) {
+			Rule ruleUnMatched = styleFactory.createRule();
+			ruleUnMatched.symbolizers().add(
+					createLineSymbolizer(unmatchedColor,
+							unmatchedWidth != null ? unmatchedWidth
+									: matchedWidth));
+			ruleUnMatched.setFilter(filterFactory.not(filter));
+			rules = new Rule[] { ruleMatched, ruleUnMatched };
+		} else {
+			rules = new Rule[] { ruleMatched };
+		}
+
+		FeatureTypeStyle fts = styleFactory.createFeatureTypeStyle(rules);
+		Style style = styleFactory.createStyle();
+		style.featureTypeStyles().add(fts);
+		return style;
+	}
+
+	public static LineSymbolizer createLineSymbolizer(String color,
+			Integer width) {
+		Stroke stroke = styleFactory.createStroke(
+				filterFactory.literal(stringToColor(color)),
+				filterFactory.literal(width));
+		return styleFactory.createLineSymbolizer(stroke, null);
+	}
+
+	/**
+	 * Converts a string to a color, using reflection, so that other methods
+	 * don't need AWT dependencies in their signature. Package protected and not
+	 * public so that it has less impact on the overall signature.
+	 */
+	static Color stringToColor(String color) {
+		try {
+			return (Color) Color.class.getField(color).get(null);
+		} catch (Exception e) {
+			throw new ArgeoException("Color " + color + " not found", e);
+		}
+	}
+}