/*
* 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.memory;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.geotools.data.Transaction;
import org.geotools.feature.NameImpl;
import org.opengis.feature.type.Name;
import org.opengis.filter.Filter;
import org.opengis.filter.capability.FilterCapabilities;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
/**
* Used to quickly adapt a collection for APIs expecting to
* be able to query generic content.
* <p>
* Please note that this is read-only access.
*
* @author Jody Garnett
*
* @source $URL$
*/
public final class CollectionSource {
private Collection collection;
private CoordinateReferenceSystem crs;
public CollectionSource( Collection collection ){
this( collection, null );
}
public CollectionSource( Collection collection, CoordinateReferenceSystem crs ){
this.collection = Collections.unmodifiableCollection( collection );
this.crs = crs;
}
public Collection content() {
return collection;
}
public Collection content( String query, String queryLanguage ) {
throw new UnsupportedOperationException("Please help me hook up the parser!");
}
public Collection content( Filter filter ) {
return content(filter, Integer.MAX_VALUE);
}
public Collection content( Filter filter, int countLimit ) {
List list = new ArrayList();
int count = 0;
for( Iterator i = collection.iterator(); i.hasNext() && count < countLimit;){
Object obj = i.next();
if( filter.evaluate( obj )){
list.add( obj );
count++;
}
}
return Collections.unmodifiableList( list );
}
public Object describe() {
return Object.class; // TODO: be more specific
}
public void dispose() {
collection = null;
}
public FilterCapabilities getFilterCapabilities() {
return null;
}
public Name getName() {
return new NameImpl("localhost/memory");
}
public void setTransaction( Transaction t ) {
// ignored
}
public CoordinateReferenceSystem getCRS(){
return crs;
}
}