/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2003-2008, 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;
import java.util.NoSuchElementException;
import org.opengis.feature.Feature;
import org.opengis.feature.type.FeatureType;
/**
* Represents an Empty, Typed, FeatureReader.
*
* @author Jody Garnett, Refractions Research
*
* @source $URL$
*/
public class EmptyFeatureReader<T extends FeatureType, F extends Feature> implements FeatureReader<T, F> {
T featureType;
/**
* An Empty FeatureReader<SimpleFeatureType, SimpleFeature> of the provided <code>featureType</code>.
*
* @param featureType
*/
public EmptyFeatureReader(T featureType) {
this.featureType = featureType;
}
/**
* @see org.geotools.data.FeatureReader#getFeatureType()
*/
public T getFeatureType() {
return featureType;
}
/**
* Throws NoSuchElementException as this is an Empty FeatureReader.
*
* @return Does not return
*
* @throws NoSuchElementException
*
* @see org.geotools.data.FeatureReader#next()
*/
public F next() throws NoSuchElementException {
throw new NoSuchElementException("FeatureReader is empty");
}
/**
* There is no next Feature.
*
* @return <code>false</code>
*
* @see org.geotools.data.FeatureReader#hasNext()
*/
public boolean hasNext() {
return false;
}
/**
* Cleans up after Empty FeatureReader.
*
* @see org.geotools.data.FeatureReader#close()
*/
public void close() {
featureType = null;
}
}