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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.fo;
import java.util.NoSuchElementException;
/**
* Class providing an iterator for zero characters. Used by the Block FO.
*/
public class NullCharIterator extends CharIterator {
private static CharIterator instance;
public static CharIterator getInstance() {
if (instance == null) {
instance = new NullCharIterator();
}
return instance;
}
/**
* Constructor
*/
public NullCharIterator() {
//nop
}
/** {@inheritDoc} */
public boolean hasNext() {
return false;
}
/** {@inheritDoc} */
public char nextChar() throws NoSuchElementException {
throw new NoSuchElementException();
}
}
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