| /* |
| * 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; |
| |
| /** |
| * Element whose data is backed by an arbitrary Java object. The backing Java object is accessed |
| * via the {@link OMDataSource} (or {@link OMDataSourceExt}) interface. |
| * <p> |
| * An OMSourcedElement can be in one of two states: |
| * <dl> |
| * <dt>Not Expanded</dt> |
| * <dd>In this state the backing object is used to read and write the XML.</dd> |
| * <dt>Expanded</dt> |
| * <dd>In this state, the OMSourcedElement is backed by a normal OM tree.</dd> |
| * </dl> |
| * <p> |
| * Here are the steps to place an arbitrary java object into the OM tree: |
| * <ol> |
| * <li>Write an {@link OMDataSourceExt} implementation that provides access to your Java |
| * object.</li> |
| * <li>Use {@link OMFactory#createOMElement(OMDataSource, String, OMNamespace)} to create |
| * the OMSourcedElement.</li> |
| * <li>Attach the OMSourcedElement to the tree.</li> |
| * </ol> |
| */ |
| public interface OMSourcedElement extends OMElement { |
| |
| /** |
| * @return true if tree is expanded or being expanded. |
| */ |
| public boolean isExpanded(); |
| |
| /** |
| * @return OMDataSource |
| */ |
| public OMDataSource getDataSource(); |
| |
| /** |
| * Replace an existing OMDataSource with a new one. |
| * @param dataSource new OMDataSource |
| * @return null or old OMDataSource |
| */ |
| public OMDataSource setDataSource(OMDataSource dataSource); |
| |
| } |