Examples of org.geotools.styling.LineSymbolizer

org.geotools.styling.LineSymbolizer
l.opengeospatial.org/files/?artifact_id=1188"> OGC Styled-Layer Descriptor Report (OGC 02-070) version 1.0.0.:
```
 <xsd:element name="LineSymbolizer" substitutionGroup="sld:Symbolizer"> <xsd:annotation> <xsd:documentation> A LineSymbolizer is used to render a "stroke" along a linear geometry. </xsd:documentation> </xsd:annotation> <xsd:complexType> <xsd:complexContent> <xsd:extension base="sld:SymbolizerType"> <xsd:sequence> <xsd:element ref="sld:Geometry" minOccurs="0"/> <xsd:element ref="sld:Stroke" minOccurs="0"/> </xsd:sequence> </xsd:extension> </xsd:complexContent> </xsd:complexType> </xsd:element> 
```
Renderers can use this information when displaying styled features, though it must be remembered that not all renderers will be able to fully represent strokes as set out by this interface. For example, opacity may not be supported.

Notes:
- The graphical parameters and their values are derived from SVG/CSS2 standards with names and semantics which are as close as possible.
@author James Macgill, CCG @source $URL$ @version $Id$

    
    /*
     * Tests that perpendicularOffset for LineSymbolizer is duplicated correctly
     */
    public void testLineSymbolizerWithPerpendicularOffset(){
        LineSymbolizer ls = sf.createLineSymbolizer();
        ls.setPerpendicularOffset(ff.literal(0.88));
        
        //copy
        LineSymbolizer copy = (LineSymbolizer) visitor.copy(ls);
        
        //compare
        assertEquals("PerpendicularOffset of LineSymbolizer has not been correctly duplicated",ls.getPerpendicularOffset(),copy.getPerpendicularOffset());
    }

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            pointMode.setSelection(false);
            polyMode.setSelection(false);
            lineMode.setSelection(false);
        } else if (mode == Mode.LINE) {
            lineMode.setSelection(true);
            LineSymbolizer sym = SLDs.lineSymbolizer(fts);
            stroke = SLDs.stroke(sym);
            placement = SLDs.getPlacement(SLDs.ALIGN_LEFT, SLDs.ALIGN_MIDDLE, 0);


            name = sym == null ? null : sym.getGeometryPropertyName();
        } else if (mode == Mode.POLYGON) {
            polyMode.setSelection(true);
            PolygonSymbolizer sym = SLDs.polySymbolizer(fts);
            stroke = SLDs.stroke(sym);
            fill = SLDs.fill(sym);
            placement = SLDs.getPlacement(SLDs.ALIGN_CENTER, SLDs.ALIGN_MIDDLE, 0);


            name = sym == null ? null : sym.getGeometryPropertyName();
        } else if (mode == Mode.POINT || mode == Mode.ALL) { // default to handling as Point
            pointMode.setSelection(true);


            PointSymbolizer sym = SLDs.pointSymbolizer(fts);
            stroke = SLDs.stroke(sym);
            fill = SLDs.fill(sym);
            graphic = SLDs.graphic(sym);
            placement = SLDs.getPlacement(SLDs.ALIGN_LEFT, SLDs.ALIGN_MIDDLE, 0);


            name = sym == null ? null : sym.getGeometryPropertyName();
        }


        text = SLDs.textSymbolizer(fts);
        if (text != null && placement != null) {
            text.setLabelPlacement(placement);

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            geometryPropertyName = geometryName.getCombo().getText();
        }


        switch( this.mode ) {
        case LINE: {
            LineSymbolizer lineSymbolizer = this.build.createLineSymbolizer(this.line.getStroke(this.build));
            acquire.add(lineSymbolizer);
            lineSymbolizer.setGeometryPropertyName(geometryPropertyName);
            if (textSym != null) {
                acquire.add(textSym);
            }
        }
            break;


        case POLYGON: {
            PolygonSymbolizer polygonSymbolizer = this.build.createPolygonSymbolizer(this.line.getStroke(this.build),
                    this.fill.getFill(this.build));
            polygonSymbolizer.setGeometryPropertyName(geometryPropertyName);
            acquire.add(polygonSymbolizer);
            if (textSym != null) {
                acquire.add(textSym);
            }
        }
            break;


        case POINT: {
            PointSymbolizer pointSymbolizer = this.build.createPointSymbolizer(this.point.getGraphic(
                    this.fill.getFill(this.build), this.line.getStroke(this.build), this.build));
            pointSymbolizer.setGeometryPropertyName(geometryPropertyName);
            acquire.add(pointSymbolizer);
            if (textSym != null) {
                acquire.add(textSym);
            }
        }
            break;
        case ALL: {
            LineSymbolizer lineSymbolizer = this.build.createLineSymbolizer(this.line.getStroke(this.build));
            acquire.add(lineSymbolizer);
            acquire.add(lineSymbolizer);
            PolygonSymbolizer polygonSymbolizer = this.build.createPolygonSymbolizer(this.line.getStroke(this.build),
                    this.fill.getFill(this.build));
            polygonSymbolizer.setGeometryPropertyName(geometryPropertyName);

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    }


    public void test() throws Exception {
        SLDMockData.lineSymbolizer(document, document);


        LineSymbolizer lineSymbolizer = (LineSymbolizer) parse();
        assertNotNull(lineSymbolizer);


        assertNotNull(lineSymbolizer.getStroke());
    }

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    }
    
    public void testTransform() throws Exception {
        SLDMockData.transformedLineSymbolizer(document, document);


        LineSymbolizer lineSymbolizer = (LineSymbolizer) parse();
        assertNotNull(lineSymbolizer);
        assertNotNull(lineSymbolizer.getStroke());
        assertNotNull(lineSymbolizer.getGeometry());
        Function tx = (Function) lineSymbolizer.getGeometry();
        assertEquals("buffer", tx.getName());
    }

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            <Stroke>
                <SvgParameter name="stroke">#0000ff</SvgParameter>
                <SvgParameter name="stroke-width">2</SvgParameter>
            </Stroke>
        </LineSymbolizer>*/
        LineSymbolizer sym = (LineSymbolizer) parse("example-linesymbolizer.xml");
        assertEquals("MyLineSymbolizer", sym.getName());
        assertEquals("Example Symbol", sym.getDescription().getTitle().toString());
        assertEquals("This is just a simple example of a line symbolizer.", 
            sym.getDescription().getAbstract().toString());
        
        Stroke s = sym.getStroke();
        assertEquals(255, s.getColor().evaluate(null, Color.class).getBlue());
        assertEquals(new Integer(2), s.getWidth().evaluate(null, Integer.class));
    }

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     * <!-- begin-user-doc --> <!-- end-user-doc -->
     * 
     * @generated modifiable
     */
    public Object parse(ElementInstance instance, Node node, Object value) throws Exception {
        LineSymbolizer sym = (LineSymbolizer) super.parse(instance, node, value);
        
        //&lt;xsd:element minOccurs="0" ref="se:PerpendicularOffset"/&gt;
        if (node.hasChild("PerpendicularOffset")) {
            sym.setPerpendicularOffset((Expression) node.getChildValue("PerpendicularOffset"));
        }
        
        return sym;
    }

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        // every symbolizer has the vendor option
        PolygonSymbolizer poly = (PolygonSymbolizer) rule.symbolizers().get(0);
        assertEquals(1, poly.getOptions().size());
        assertEquals("true", poly.getOptions().get("labelObstacle"));
        
        LineSymbolizer line = (LineSymbolizer) rule.symbolizers().get(1);
        assertEquals(1, line.getOptions().size());
        assertEquals("true", line.getOptions().get("labelObstacle"));
        
        PointSymbolizer point = (PointSymbolizer) rule.symbolizers().get(2);
        assertEquals(1, point.getOptions().size());
        assertEquals("true", point.getOptions().get("labelObstacle"));

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     *
     * @generated modifiable
     */
    public Object parse(ElementInstance instance, Node node, Object value)
        throws Exception {
        LineSymbolizer ls = styleFactory.createLineSymbolizer();


        //&lt;xsd:element ref="sld:Geometry" minOccurs="0"/&gt;
        if(node.hasChild("Geometry")) {
            Expression geometry = (Expression) node.getChildValue("Geometry");
            if(geometry instanceof PropertyName) {
                PropertyName propertyName = (PropertyName) geometry;
                ls.setGeometryPropertyName(propertyName.getPropertyName());
            } else {
                ls.setGeometry(geometry);
            }
        }


        //&lt;xsd:element ref="sld:Stroke" minOccurs="0"/&gt;
        if (node.hasChild(Stroke.class)) {
            ls.setStroke((Stroke) node.getChildValue(Stroke.class));
        }
        
        //&lt;xsd:element ref="sld:VendorOption" minOccurs="0" maxOccurs="unbounded"/&gt;
        for (CssParameter param : (List<CssParameter>) node.getChildValues(CssParameter.class)) {
            ls.getOptions().put(param.getName(), param.getExpression().evaluate(null, String.class));
        }


        return ls;
    }

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        rm = (Mark) rps.getFill().getGraphicFill().graphicalSymbols().get(0);
        assertEquals(4.0, rm.getStroke().getWidth().evaluate(null, Double.class), 0d);


        
        // a line symbolizer that uses a graphic stroke
        LineSymbolizer ls = sb.createLineSymbolizer(stroke);
        
        // rescale it
        ls.accept(visitor);
        LineSymbolizer lps = (LineSymbolizer) visitor.getCopy();
        rm = (Mark) lps.getStroke().getGraphicStroke().graphicalSymbols().get(0);
        assertEquals(2.0, rm.getStroke().getWidth().evaluate(null, Double.class), 0d);
    }

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