/**
SpagoBI - The Business Intelligence Free Platform
Copyright (C) 2005-2009 Engineering Ingegneria Informatica S.p.A.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
**/
package it.eng.spagobi.engines.georeport.features.provider;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.apache.log4j.Logger;
import org.json.JSONArray;
import org.json.JSONObject;
import org.mapfish.geo.MfFeature;
import org.mapfish.geo.MfFeatureCollection;
import org.mapfish.geo.MfGeoJSONReader;
import it.eng.spagobi.commons.utilities.StringUtilities;
import it.eng.spagobi.engines.georeport.GeoReportEngine;
import it.eng.spagobi.engines.georeport.features.SbiFeatureFactory;
import it.eng.spagobi.utilities.assertion.Assert;
import it.eng.spagobi.utilities.exceptions.SpagoBIRuntimeException;
/**
* @authors Andrea Gioia (andrea.gioia@eng.it)
*/
public class FeaturesProviderDAOFileImpl implements IFeaturesProviderDAO {
String indexOnAttribute;
Map<Object, JSONObject> lookupTable;
public static final String GEOID_PNAME = "geoIdPName";
public static final String GEOID_PVALUE = "geoIdPValue";
private static final MfGeoJSONReader JSON_READER = new MfGeoJSONReader(SbiFeatureFactory.getInstance());
/** Logger component. */
private static transient Logger logger = Logger.getLogger(FeaturesProviderDAOFileImpl.class);
public MfFeatureCollection getFeatures(Object fetureProviderEndPoint, Map parameters) {
MfFeatureCollection featureCollection;
String geoIdPName;
String geoIdPValue;
JSONObject fetaure;
logger.debug("IN");
featureCollection = null;
try {
geoIdPName = (String)parameters.get(GEOID_PNAME);
logger.debug("Parameter [" + GEOID_PNAME + "] is equal to [" + geoIdPName + "]");
geoIdPValue = (String)parameters.get(GEOID_PVALUE);
logger.debug("Parameter [" + GEOID_PVALUE + "] is equal to [" + geoIdPValue + "]");
if(!geoIdPName.equalsIgnoreCase(indexOnAttribute)) {
createIndex((String)fetureProviderEndPoint, geoIdPName);
}
fetaure = lookupTable.get(geoIdPValue);
logger.debug("Feature [" + geoIdPValue +"] is equal to [" + fetaure + "]");
if(fetaure != null) {
Object x = JSON_READER.decode(fetaure);
logger.debug("Decoded object is of type [" + x.getClass().getName() + "]");
MfFeature mfFeature = (MfFeature)x;
Collection<MfFeature> mfFeatures = new ArrayList();
mfFeatures.add(mfFeature);
featureCollection = new MfFeatureCollection(mfFeatures);;
logger.debug("Feature [" + geoIdPValue + "] added to result features' collection");
} else {
logger.warn("Impossible to find feature [" + geoIdPValue + "]");
}
} catch(Throwable t) {
throw new SpagoBIRuntimeException(t);
} finally {
logger.debug("OUT");
}
return featureCollection;
}
private void createIndex(String filename, String geoIdPName) {
String resourcesDir;
File targetFile;
logger.debug("IN");
try {
Assert.assertTrue(!StringUtilities.isEmpty(filename), "Input parameter [filename] cannot be null or empty");
Assert.assertTrue(!StringUtilities.isEmpty(geoIdPName), "Input parameter [filename] cannot be null or empty");
logger.debug("Indexing file [" + filename + "] on attribute [" + geoIdPName + "] ...");
indexOnAttribute = geoIdPName;
lookupTable = new HashMap();
resourcesDir = GeoReportEngine.getConfig().getEngineConfig().getResourcePath() + "/georeport";
logger.debug("Resource dir is equal to [" + resourcesDir + "]");
targetFile = new File(resourcesDir, filename);
logger.debug("Target file full name is equal to [" + targetFile + "]");
JSONObject o = loadFile( targetFile );
JSONArray a = o.getJSONArray("features");
Assert.assertNotNull(a, "Impossible to find attribute [features in file [" + filename +"]");
logger.debug("Target file contains [" + a.length() + "] features to index");
for(int i = 0; i < a.length(); i++) {
JSONObject f = a.getJSONObject(i);
JSONObject p = f.getJSONObject("properties");
lookupTable.put(p.get(geoIdPName), f);
logger.debug("Feature [" + p.get(geoIdPName) + "] added to the index");
}
logger.debug("File [" + filename + "] indexed succesfully on attribute [" + geoIdPName + "]");
} catch(Throwable t) {
indexOnAttribute = null;
lookupTable = null;
throw new SpagoBIRuntimeException(t);
} finally {
logger.debug("OUT");
}
}
private JSONObject loadFile(File targetFile) {
JSONObject result;
BufferedReader reader;
StringBuffer buffer;
String line;
try {
reader = new BufferedReader(new FileReader( targetFile ));
buffer = new StringBuffer();
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
reader.close();
result = new JSONObject(buffer.toString());
} catch(Throwable t) {
throw new SpagoBIRuntimeException(t);
}
return result;
}
}