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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;
-
- /**
- * Obtain the singleton instance of the null character iterator.
- * @return the char iterator
- */
- 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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