graphicsdrawingtask.java

esri的ArcGIS Server超级学习模板程序（for java）

package com.esri.solutions.jitk.web.tasks;

import org.apache.log4j.Logger;

import com.esri.adf.web.data.WebContext;
import com.esri.adf.web.data.graphics.GraphicsResource;
import com.esri.adf.web.data.tasks.TaskInfo;
import com.esri.solutions.jitk.web.data.graphics.MultiGeometryGraphicsResource;

public abstract class GraphicsDrawingTask extends RenderControlledTask {	
	private static final Logger _logger = Logger.getLogger(GraphicsDrawingTask.class);
	private String _taskName = null;
	protected MultiGeometryGraphicsResource mgResource = null;
	
	public void setGraphicsResourceKey(String resourceKey) {
		if(mgResource == null) {
			WebContext context = getContext();
			
			if(context == null) {
				_logger.error("Setting GraphicsResource key failed in GraphicsDrawingTask class. WebContext is null.");
			}
			else {
				try {
					mgResource = new MultiGeometryGraphicsResource((GraphicsResource) context.getResourceById(resourceKey));
				} 
				catch(NullPointerException ex) { 
					_logger.error("Setting GraphicsResource key failed in GraphicsDrawingTask class. See log for more detailes..."); 
				}
			}
		}
	}
	
	public WebContext getContext() {	
		
		if (_context == null && mgResource != null) {
			super.setContext(mgResource.getContext());
		}
		
		return _context;
	}

	public TaskInfo getTaskInfo() {
		
		if (getContext() == null) {			
			_taskInfo.getTaskDescriptor().setDisabled(true);
			_logger.warn("WebContext null for task, disabling task descriptor");
		}
		
		return this._taskInfo;
	}
	
	public String getTaskName() { 
		return _taskName; 
	}
	
	public void setTaskName(String taskName) { 
		this._taskName = taskName; 
	}
}