/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
*
* 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;
* version 2.1 of the License.
*
* 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.
*/
package org.geotools.data.gen;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.geotools.data.DataStore;
import org.geotools.data.DefaultServiceInfo;
import org.geotools.data.FeatureReader;
import org.geotools.data.FeatureWriter;
import org.geotools.data.LockingManager;
import org.geotools.data.Query;
import org.geotools.data.Repository;
import org.geotools.data.ServiceInfo;
import org.geotools.data.Transaction;
import org.geotools.data.gen.info.GeneralizationInfo;
import org.geotools.data.gen.info.GeneralizationInfos;
import org.geotools.data.simple.SimpleFeatureSource;
import org.geotools.data.view.DefaultView;
import org.geotools.factory.Hints;
import org.geotools.feature.FeatureTypes;
import org.geotools.feature.SchemaException;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.feature.type.Name;
import org.opengis.filter.Filter;
/**
* @author Christian Mueller
*
* Datastore for multiple feature types with pregeneralized geometries
*
* The data store is read only, all modifying methods throw an {@link UnsupportedOperationException}
*
* This data store does business as usual with the following exception:
*
* If a method has a {@link Query} parameter and {@link Query#getHints()} includes
* {@link Hints#GEOMETRY_DISTANCE} with a given distance, the datastore looks for the best fit
* pregeneralized geometries and returns these geometries instead of the original ones.
*
* This process results in a lower memory usage, lower cpu usage for further processing and will
* decrease response time for the user.
*
*
*
*
* @source $URL$
*/
public class PreGeneralizedDataStore implements DataStore {
public URI getNamespace() {
return namespace;
}
Map<String, PreGeneralizedFeatureSource> featureSources;
private URI namespace;
/**
* @param infos
* @param repository
*
*/
public PreGeneralizedDataStore(GeneralizationInfos infos, Repository repository) {
this(infos, repository, null);
}
/**
* @param infos
* @param repository
* @param namespace
*/
public PreGeneralizedDataStore(GeneralizationInfos infos, Repository repository, URI namespace) {
this.namespace = namespace;
featureSources = new HashMap<String, PreGeneralizedFeatureSource>();
for (GeneralizationInfo gi : infos.getGeneralizationInfoCollection()) {
featureSources.put(gi.getFeatureName(), new PreGeneralizedFeatureSource(gi, repository,
this));
}
}
public FeatureReader<SimpleFeatureType, SimpleFeature> getFeatureReader(Query query,
Transaction transaction) throws IOException {
PreGeneralizedFeatureSource fs = featureSources.get(query.getTypeName());
if (fs == null)
throw new IOException(query.getTypeName() + " not found");
return fs.getFeatureReader(query, transaction);
}
public SimpleFeatureSource getFeatureSource(String typeName)
throws IOException {
SimpleFeatureSource fs = featureSources.get(typeName);
if (fs == null)
throw new IOException(typeName + " not found");
return fs;
}
public FeatureWriter<SimpleFeatureType, SimpleFeature> getFeatureWriter(String typeName,
Transaction transaction) throws IOException {
throw new UnsupportedOperationException("getFeatureWriter");
}
public FeatureWriter<SimpleFeatureType, SimpleFeature> getFeatureWriter(String typeName,
Filter filter, Transaction transaction) throws IOException {
throw new UnsupportedOperationException("getFeatureWriter");
}
public FeatureWriter<SimpleFeatureType, SimpleFeature> getFeatureWriterAppend(String typeName,
Transaction transaction) throws IOException {
throw new UnsupportedOperationException("getFeatureWriterAppend");
}
public LockingManager getLockingManager() {
throw new UnsupportedOperationException("getLockingManager");
}
public SimpleFeatureType getSchema(String typeName) throws IOException {
return getFeatureSource(typeName).getSchema();
}
public String[] getTypeNames() throws IOException {
Set<String> keys = featureSources.keySet();
return keys.toArray(new String[keys.size()]);
}
public void updateSchema(String typeName, SimpleFeatureType featureType) throws IOException {
throw new UnsupportedOperationException("updateSchema");
}
public void createSchema(SimpleFeatureType featureType) throws IOException {
throw new UnsupportedOperationException("createSchema");
}
public void dispose() {
for (PreGeneralizedFeatureSource fs : featureSources.values()) {
fs.reset();
}
}
public SimpleFeatureSource getFeatureSource(Name typeName)
throws IOException {
return getFeatureSource(typeName.getLocalPart());
}
public ServiceInfo getInfo() {
// TODO
DefaultServiceInfo info = new DefaultServiceInfo();
info.setDescription("Generalized Feature Store ");
info.setSchema(FeatureTypes.DEFAULT_NAMESPACE);
try {
info.setPublisher(new URI(System.getProperty("user.name")));
// TODO IBM SDK problem
// info.setPublisher( new URI(System.getenv("user.name")) );
} catch (URISyntaxException e) {
}
return info;
}
public List<Name> getNames() throws IOException {
List<Name> nameList = new ArrayList<Name>();
for (PreGeneralizedFeatureSource fs : featureSources.values()) {
nameList.add(fs.getName());
}
return nameList;
}
public SimpleFeatureType getSchema(Name name) throws IOException {
return getFeatureSource(name).getSchema();
}
public void updateSchema(Name typeName, SimpleFeatureType featureType) throws IOException {
throw new UnsupportedOperationException("updateSchema");
}
}