| /* |
| * 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. |
| */ |
| |
| package org.apache.axiom.om.impl.traverse; |
| |
| import org.apache.axiom.om.OMElement; |
| import org.apache.axiom.om.OMException; |
| import org.apache.axiom.om.OMNode; |
| |
| import java.util.Iterator; |
| |
| /** |
| * @deprecated This type of iterator should always be created using |
| * {@link OMElement#getChildElements()}, and this class should never be referenced |
| * directly. It will be removed in Axiom 1.3. |
| */ |
| @SuppressWarnings("rawtypes") |
| public class OMChildElementIterator implements Iterator { |
| |
| /** Field currentChild */ |
| protected OMNode currentChild; |
| |
| /** Field lastChild */ |
| protected OMNode lastChild; |
| |
| /** Field nextCalled */ |
| protected boolean nextCalled = false; |
| |
| /** Field removeCalled */ |
| protected boolean removeCalled = false; |
| |
| /** |
| * Constructor OMChildrenIterator. |
| * |
| * @param currentChild |
| */ |
| public OMChildElementIterator(OMElement currentChild) { |
| this.currentChild = currentChild; |
| } |
| |
| /** |
| * Removes the last element returned by the iterator (optional operation) from the underlying |
| * collection. This method can be called only once per call to {@code next}. The behavior of |
| * an iterator is unspecified if the underlying collection is modified while the iteration is in |
| * progress in any way other than by calling this method. |
| * |
| * @throws UnsupportedOperationException if the {@code remove} operation is not supported by |
| * this Iterator. |
| * @throws IllegalStateException if the {@code next} method has not yet been called, or |
| * the {@code remove} method has already been called |
| * after the last call to the {@code next} method. |
| */ |
| @Override |
| public void remove() { |
| if (!nextCalled) { |
| throw new IllegalStateException( |
| "next method has not yet being called"); |
| } |
| if (removeCalled) { |
| throw new IllegalStateException("remove has already being called"); |
| } |
| removeCalled = true; |
| |
| // since this acts on the last child there is no need to mess with the current child |
| if (lastChild == null) { |
| throw new OMException("cannot remove a child at this stage!"); |
| } |
| lastChild.detach(); |
| } |
| |
| /** |
| * Returns {@code true} if the iteration has more elements. (In other words, returns |
| * {@code true} if {@code next} would return an element rather than throwing an exception.) |
| * |
| * @return Returns {@code true} if the iterator has more elements. |
| */ |
| @Override |
| public boolean hasNext() { |
| return (currentChild != null); |
| } |
| |
| /** |
| * Returns the next element in the iteration. |
| * |
| * @return Returns the next element in the iteration. |
| * @throws java.util.NoSuchElementException |
| * iteration has no more elements. |
| */ |
| @Override |
| public Object next() { |
| nextCalled = true; |
| removeCalled = false; |
| |
| if (hasNext()) { |
| lastChild = currentChild; |
| do { |
| currentChild = currentChild.getNextOMSibling(); |
| } while (currentChild != null && currentChild.getType() != OMNode.ELEMENT_NODE); |
| |
| |
| return lastChild; |
| } |
| return null; |
| } |
| } |