PublishSpatialDataCommand.java

/*******************************************************************************
 * Copyright 2012 University of Southern California
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * 	http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * This code was developed by the Information Integration Group as part 
 * of the Karma project at the Information Sciences Institute of the 
 * University of Southern California.  For more information, publications, 
 * and related projects, please see: http://www.isi.edu/integration
 ******************************************************************************/
package edu.isi.karma.controller.command.publish;

import java.io.FileNotFoundException;
import java.io.PrintWriter;

import org.json.JSONException;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import edu.isi.karma.controller.command.Command;
import edu.isi.karma.controller.command.CommandException;
import edu.isi.karma.controller.update.AbstractUpdate;
import edu.isi.karma.controller.update.ErrorUpdate;
import edu.isi.karma.controller.update.UpdateContainer;
import edu.isi.karma.geospatial.WorksheetToFeatureCollection;
import edu.isi.karma.modeling.ontology.OntologyManager;
import edu.isi.karma.modeling.semantictypes.SemanticTypeUtil;
import edu.isi.karma.rep.Worksheet;
import edu.isi.karma.rep.Workspace;
import edu.isi.karma.rep.metadata.TagsContainer.TagName;
import edu.isi.karma.view.VWorkspace;

public class PublishSpatialDataCommand extends Command {
	private final String vWorksheetId;

	private enum JsonKeys {
		updateType, fileUrl, vWorksheetId
	}

	private static Logger logger = LoggerFactory
			.getLogger(PublishSpatialDataCommand.class);

	protected PublishSpatialDataCommand(String id, String vWorksheetId) {
		super(id);
		this.vWorksheetId = vWorksheetId;
	}

	@Override
	public String getCommandName() {
		return this.getClass().getSimpleName();
	}

	@Override
	public String getTitle() {
		return "Export spatial data";
	}

	@Override
	public String getDescription() {
		return null;
	}

	@Override
	public CommandType getCommandType() {
		return CommandType.notInHistory;
	}

	@Override
	public UpdateContainer doIt(VWorkspace vWorkspace) throws CommandException {
		Worksheet worksheet = vWorkspace.getViewFactory()
				.getVWorksheet(vWorksheetId).getWorksheet();

		Workspace ws = vWorkspace.getWorkspace();
		if (worksheet.getSemanticTypes().getListOfTypes().size() == 0) {
			SemanticTypeUtil.populateSemanticTypesUsingCRF(worksheet, ws
					.getTagsContainer().getTag(TagName.Outlier), ws
					.getCrfModelHandler(), ws.getOntologyManager());
		}

		OntologyManager om= ws.getOntologyManager();
		WorksheetToFeatureCollection geo = new WorksheetToFeatureCollection(worksheet,om);//ying
		
		// Send an error update if no geospatial data found!
		if (geo.hasNoGeospatialData()) {
			return new UpdateContainer(new ErrorUpdate(
					"No geospatial data found in the worksheet!"));
		}

		try {
			
			geo.SaveSpatialDataAndReturnKMLString();
			final String zippedSpatialDataPath = geo.getZippedSpatialDataPath();

			return new UpdateContainer(new AbstractUpdate() {
				@Override
				public void generateJson(String prefix, PrintWriter pw,
						VWorkspace vWorkspace) {
					JSONObject outputObject = new JSONObject();
					try {
						outputObject.put(JsonKeys.updateType.name(),
								"PublishSpatialDataUpdate");
						outputObject.put(JsonKeys.fileUrl.name(),
								"publish/SpatialData/" + zippedSpatialDataPath);
						outputObject.put(JsonKeys.vWorksheetId.name(),
								vWorksheetId);
						pw.println(outputObject.toString(4));
						
					} catch (JSONException e) {
						logger.error("Error occured while generating JSON!");
					}
				}
			});
		} catch (FileNotFoundException e) {
			logger.error("Spatial data folder not found!", e);
			return new UpdateContainer(new ErrorUpdate(
					"Error occurred while exporting spatial data!"));
		}catch (Exception shapfileException) {
			// TODO Auto-generated catch block
			shapfileException.printStackTrace();
			return new UpdateContainer(new ErrorUpdate(
					"Error occurred while saving Shapefile!"));
		}
		
	}

	@Override
	public UpdateContainer undoIt(VWorkspace vWorkspace) {
		// TODO Auto-generated method stub
		return null;
	}

}