multigeometrygraphicslayer.java

esri的ArcGIS Server超级学习模板程序（for java）

/**
 * 
 */
package com.esri.solutions.jitk.web.data.graphics;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;

import com.esri.adf.web.data.geometry.WebGeometry;
import com.esri.adf.web.data.graphics.GraphicFeature;
import com.esri.adf.web.data.graphics.GraphicsLayer;
import com.esri.adf.web.data.renderer.WebRenderer;
import com.esri.adf.web.data.renderer.WebUniqueValueInfo;
import com.esri.adf.web.data.renderer.WebUniqueValueRenderer;
import com.esri.adf.web.data.symbol.WebSymbol;

/**
 * @author vlad2928
 *
 */
public class MultiGeometryGraphicsLayer extends GraphicsLayer {

	private static final String _fid = "FID";

	public MultiGeometryGraphicsLayer() { super(); }
	public MultiGeometryGraphicsLayer(String name, boolean visible, WebRenderer renderer, WebRenderer highlightRenderer, String infoTemplate, List<GraphicFeature> graphicFeatures) {}

	protected Map<String, String> createAttributes(String fid) {
		Map<String, String> map = new LinkedHashMap<String, String>();
		map.put(_fid, fid);		
		return map;
	}
	
	public void addGraphicFeature(WebGeometry geometry, WebSymbol symbol, WebSymbol highlightSymbol) {
		
		GraphicFeature feature = new GraphicFeature();
		String fid = UUID.randomUUID().toString();
		feature.setGeometry(geometry);
		feature.setAttributes(createAttributes(fid));
		setRenderer(updateRenderer(getRenderer(), fid, symbol));
		setHighlightRenderer(updateRenderer(getHighlightRenderer(), fid, highlightSymbol));
		
	    super.addGraphicFeature(feature);		
	}
	
	public GraphicFeature getGraphicFeature(String fid) {
		
		if(fid != null && this.getGraphicsFeatures() != null) {
			for (GraphicFeature feature : this.getGraphicsFeatures()) {
				if (((String)feature.getAttributes().get(_fid)).equals(fid))
					return feature;
			}
		}
		
		return null;
	}	
	
	/*
	 * @return - indicates if feature was removed from the layer
	 */
	public boolean removeGraphicFeature(String fid) {
		
		GraphicFeature feature = getGraphicFeature(fid);
		
		if(feature != null) {
			// Remove feature itself
			super.removeGraphicFeature(feature);
			
			// Also remove correspondent UniqueValueInfos from both renderers
			setRenderer(updateRenderer(getRenderer(), fid, null));
			setHighlightRenderer(updateRenderer(getHighlightRenderer(), fid, null));
			
			return true;
		}
		
		return false;
	}
			
	public void removeAllGraphicFeatures() {
		super.removeAllGraphicFeatures();
		setRenderer(updateRenderer(null, null, null));
		setHighlightRenderer(updateRenderer(null, null, null));
	}
	
	protected WebUniqueValueRenderer newUniqueValueRenderer() {
		
		WebUniqueValueRenderer uvr = new WebUniqueValueRenderer();
		//uvr.setDefaultLabel("Default Label");
		//uvr.setDefaultSymbol(defaultMarkerSymbol);
	    uvr.setField1(_fid);
		uvr.setField2(null);
		uvr.setField3(null);
		uvr.setFieldDelimiter(null);
	    
		return uvr;
	}
	
	protected WebUniqueValueRenderer newHighlightUniqueValueRenderer() {
		
		WebUniqueValueRenderer uvr = new WebUniqueValueRenderer();
		//uvr.setDefaultLabel("Default Label");
		//uvr.setDefaultSymbol(defaultMarkerSymbol);
	    uvr.setField1(_fid);
		uvr.setField2(null);
		uvr.setField3(null);
		uvr.setFieldDelimiter(null);
		
		return uvr;
	}

	protected WebUniqueValueInfo getWebUniqueValueInfo(WebUniqueValueRenderer uvr, String fid) {
		
		if(uvr != null && uvr.getUniqueValueInfos() != null && fid != null) {
			for(java.util.Iterator<WebUniqueValueInfo> i = uvr.getUniqueValueInfos().iterator(); i.hasNext();) {
				WebUniqueValueInfo uvi = i.next(); 
				if(uvi.getValue().equals(fid))
					return uvi;
			}
		}
		
		return null;
	}
	
	protected WebUniqueValueRenderer updateRenderer(WebRenderer renderer, String fid, WebSymbol symbol) {
		
		WebUniqueValueRenderer uvr = null;
		
		if(renderer == null || !(renderer instanceof WebUniqueValueRenderer))
			uvr = newUniqueValueRenderer();
		else
			uvr = (WebUniqueValueRenderer) renderer;
		
		if(uvr.getUniqueValueInfos() == null)
			uvr.setUniqueValueInfos(new ArrayList<WebUniqueValueInfo>());
		
		List<WebUniqueValueInfo> infos = uvr.getUniqueValueInfos();
		
		if(fid != null && fid.length() > 0) {

			// remove from renderer if symbol is null
			if(symbol == null) {
				WebUniqueValueInfo uvi = getWebUniqueValueInfo(uvr, fid);
				if(uvi != null) infos.remove(uvi);
			
			// add to renderer
			} else {
				infos.add(new WebUniqueValueInfo(_fid, "Feature ID", fid, symbol));
				uvr.setUniqueValueInfos(infos);
			}
		}
		
		return uvr;
	}
}