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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.
 */
 
 
 package org.odftoolkit.simple;
 
 
This class is the parent of classes that present all kinds of document structures.

Since:
0.5
 
 public abstract class Component {

Return the instance of OdfElement which presents this structure.

Returns:
the instance of OdfElement
 
 	public abstract OdfElement getOdfElement();

Register component to the map repository

Parameters:
component the component to be registered.
element the instance of OdfElement which presents this component.
See also:
Document.getComponentMap()
 
 	protected static void registerComponent(Component componentOdfElement element) {
 		Document ownerDoc = component.getOwnerDocument();
 		synchronized (ownerDoc) {
 			IdentityHashMap<OdfElementComponentrepository = ownerDoc.getComponentMap();
 			repository.put(elementcomponent);
 		}
 	}

Unregister component from the map repository

Parameters:
element the instance of OdfElement which presents this component.
Since:
0.6.5
See also:
Document.getComponentMap()
 
 	protected static void unregisterComponent(OdfElement element) {
 		Document ownerDoc = (Document) ((OdfFileDomelement.getOwnerDocument()).getDocument();
 		synchronized (ownerDoc) {
 			IdentityHashMap<OdfElementComponentrepository = ownerDoc.getComponentMap();
 			repository.remove(element);
 		}
 	}

Get the component instance by the element instance. Return null if there is no such element registered.

Parameters:
element the instance of OdfElement which presents this component.
Returns:
the component instance
 
 	protected static Component getComponentByElement(OdfElement element) {
 		Document doc = (Document) ((OdfFileDomelement.getOwnerDocument()).getDocument();
 		return repository.get(element);
 	}

Get the owner document of this component

Returns:
- the owner document
 
 	public Document getOwnerDocument() {
 	}
 
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