/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2004-2008, 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.feature;
import java.io.IOException;
import java.util.Iterator;
import java.util.NoSuchElementException;
import org.geotools.data.FeatureReader;
import org.opengis.feature.Feature;
import org.opengis.feature.type.FeatureType;
/**
* An iterator that wraps around a FeatureReader.
* The Iterator's hasNext() will return false if the wrapped feature reader's
* hasNext method throws an exception. If next() throws an exeption a NoSuchElementException
* will be thrown.
*
* @author jeichar
* @source $URL$
*/
public class FeatureReaderIterator<F extends Feature> implements Iterator<F> {
private FeatureReader<? extends FeatureType, F> reader;
/**
*
*/
public FeatureReaderIterator(FeatureReader <? extends FeatureType, F> reader) {
this.reader=reader;
}
/* (non-Javadoc)
* @see java.util.Iterator#hasNext()
*/
public boolean hasNext() {
try{
return reader.hasNext();
}catch (Exception e) {
return false;
}
}
/* (non-Javadoc)
* @see java.util.Iterator#next()
*/
public F next() {
try{
return reader.next();
}catch (Exception e) {
throw new NoSuchElementException("Exception raised during next: "+e.getLocalizedMessage());
}
}
/* (non-Javadoc)
* @see java.util.Iterator#remove()
*/
public void remove() {
throw new UnsupportedOperationException("Iterator is read only");
}
public void close(){
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}