Examples of org.geotools.styling.StyledLayerDescriptor

org.geotools.styling.StyledLayerDescriptor
Holds styling information (from a StyleLayerDescriptor document).
This interface is bound to version 1.0 of the SLD specification.

For many of us in geotools this is the reason we came along for the ride - a pretty picture. For documentation on the use of this class please consult the SLD 1.0 specification.

We may experiment with our own (or SLD 1.1) ideas but will mark such experiments for you. This is only an issue of you are considering writing out these objects for interoptability with other systems.

General stratagy for supporting multiple SLD versions (and experiments):
- These interfaces will reflect the current published specification
- Our implementations will be BIGGER and more capabile then any one specification
- We cannot defined explicit interfaces tracking each version until we move to Java 5 (perferably GeoAPI would hold these anyways)
- We can provided javadocs indicating extentions, and isolate these using the normal java convention: TextSymbolizer and TextSymbolizer2 (In short you will have to go out of your way to work with a hack or experiment, you won't depend on one by accident)
- We can use Factories (aka SLD1Factory and SLD1_1Factory and SEFactory) to support the creation of conformant datastructures. Code (such as user interfaces) can be parameratized with these factories when they need to confirm to an exact version supported by an individual service. We hope that specifications are always adative, and will be forced to throw unsupported exceptions when functionality is removed from a specification.
@author Ian Turton, CCG @author James Macgill, CCG @author Jody Garnett, Refractions Research @source $URL$ @version SLD 1.0 @since GeoTools 2.0

     * @see net.refractions.project.internal.render.SelectionStyleContent#createDefaultStyledLayerDescriptor
     * @param style
     * @return SLD
     */
    public static StyledLayerDescriptor createDefaultStyledLayerDescriptor(Style style) {
        StyledLayerDescriptor sld = createDefaultStyledLayerDescriptor();
        UserLayer layer = styleFactory.createUserLayer();
        //FeatureTypeConstraint ftc = styleFactory.createFeatureTypeConstraint(null, Filter.INCLUDE, null);
        layer.setLayerFeatureConstraints(new FeatureTypeConstraint[] {null});
        sld.addStyledLayer(layer);
        layer.addUserStyle(style);
        return sld;
    }

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     * @see net.refractions.style.sld.SLDContent#createDefaultStyledLayerDescriptor
     * @param style
     * @return SLD
     */
    private static StyledLayerDescriptor createDefaultStyledLayerDescriptor( Style style ) {
        StyledLayerDescriptor sld = styleFactory.createStyledLayerDescriptor();
        UserLayer layer = styleFactory.createUserLayer();
        sld.addStyledLayer(layer);
        layer.addUserStyle(style);
        return sld;
    }

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            file =fileID.toFile("SLD");
            if( !file.exists()){
                return null; // sidecar file not avaialble
            }
        }
        StyledLayerDescriptor sld = SLDs.parseSLD( file );
        if( sld == null ){
            return null; // well that is unexpected since f.exists()
        }
        
        Style[] styles = SLDs.styles( sld );

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        //save changes to style object
        StyleFactory factory = StyleFactoryFinder.createStyleFactory();
        InputStream is = getXMLasInputStream(xml, encoding);
        if (is == null) return null;
        SLDParser stylereader = new SLDParser(factory, is);
        StyledLayerDescriptor sld = stylereader.parseSLD();
        return sld;
    }

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        //busy cursor
        Cursor waitCursor = new Cursor(Display.getCurrent(), SWT.CURSOR_WAIT);
        setDisplayCursor(waitCursor);


        //generate the SLD
        StyledLayerDescriptor sld = null;
        Style style = null;
        String xml = sldTextBox.getText();
        if (xml == null) {
            resetCursor(waitCursor);
            return false;

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        String filename = null;
        if (target instanceof Layer) {
            Layer layer = (Layer) target;
            filename = layer.getName();
        } else if (target instanceof StyledLayerDescriptor) {
            StyledLayerDescriptor sld = (StyledLayerDescriptor) target;
            filename = sld.getTitle();
            if (filename == null) filename = sld.getName();
        }
        if (filename == null) filename = Messages.ImportExport_new; 
        filename = filename.replace(':', '_');
        return filename + " " + Messages.ImportExport_selected;  //$NON-NLS-1$
    }

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    public void exportTo( Object target, File file, IProgressMonitor monitor ) throws Exception {
        SLDTransformer aTransformer = new SLDTransformer();
        aTransformer.setIndentation(StyleEditor.INDENT);
        String xml = ""; //$NON-NLS-1$
        if (target instanceof StyledLayerDescriptor) {
            StyledLayerDescriptor sld = (StyledLayerDescriptor) target;
            xml = aTransformer.transform(sld);
        } else {
            SLDPlugin.log("StyledLayerDescriptor not found", null); //$NON-NLS-1$
            throw (IOException) new IOException("SLD not found"); //$NON-NLS-1$
        }

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        styleBlackboard.setSelected(new String[]{SLDContent.ID});
    }


    private StyledLayerDescriptor getSLD( Style style ) {
        if (style != null) {
            StyledLayerDescriptor sld = null; // SLDs.styledLayerDescriptor(style);
            if (sld == null) {
                sld = SLDContent.createDefaultStyledLayerDescriptor(style);
            }
            return sld;
        }

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                    //get the style
                    Style style = getStyle();
                    //ensure the style has an SLD
                    if (style == null) throw new RuntimeException("Style is null"); //$NON-NLS-1$
                    
                    StyledLayerDescriptor sld = null; //SLDs.styledLayerDescriptor(style);
                    if (sld == null) {
                        SLDContent.createDefaultStyledLayerDescriptor(style);
                    }
                    //insert/replace the FTS
                    try {

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            StyleLayer layer = styleEditorDialog.selectedLayer;
            layer.getStyleBlackboard().clear();
            SetDefaultStyleProcessor p = new SetDefaultStyleProcessor(layer.getGeoResource(), layer);
            p.run();
            Style style = (Style) layer.getStyleBlackboard().get(SLDContent.ID);
            StyledLayerDescriptor oldSLD=null;
            if(style!=null){
                oldSLD = this.styleEditorDialog.getSLD();
            }
            this.styleEditorDialog.selectedLayer.apply();
            this.styleEditorDialog.selectedLayer.getMap().getRenderManager().refresh(this.styleEditorDialog.selectedLayer, null);
            
            if( oldSLD!=null ){
                StyledLayerDescriptor newSLD = this.styleEditorDialog.getSLD();
            }
            this.styleEditorDialog.setExitButtonState();
            this.styleEditorDialog.getCurrentPage().refresh();
    }

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