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ODFDOM is an OpenDocument Format (ODF) framework. Its purpose is to provide an easy common way to create, access and manipulate ODF files, without requiring detailed knowledge of the ODF specification. It is designed to provide the ODF developer community with an easy lightwork programming API portable to any object-oriented language. The current reference implementation is written in Java.

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/************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * Copyright 2008, 2010 Oracle and/or its affiliates. All rights reserved.
 * 
 * Use is subject to license terms.
 * 
 * Licensed 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. You can also
 * obtain a copy of the License at http://odftoolkit.org/docs/license.txt
 * 
 * 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.odfdom.dom;

import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathFactory;

import org.odftoolkit.odfdom.dom.element.office.OfficeDocumentMetaElement;
import org.odftoolkit.odfdom.dom.element.office.OfficeMetaElement;
import org.odftoolkit.odfdom.pkg.NamespaceName;
import org.odftoolkit.odfdom.pkg.OdfFileDom;

/**
 * The DOM repesentation of the ODF meta.xml file of an ODF document.
 */
public class OdfMetaDom extends OdfFileDom {

	private static final long serialVersionUID = 766167617530147884L;

	/**
	 * Creates the DOM representation of an XML file of an Odf document.
	 *
	 * @param odfDocument   the document the XML files belongs to
	 * @param packagePath   the internal package path to the XML file
	 */
	public OdfMetaDom(OdfSchemaDocument odfDocument, String packagePath) {
		super(odfDocument, packagePath);
		OfficeDocumentMetaElement rootElement = this.getRootElement();
		if(rootElement == null){		
			rootElement = new OfficeDocumentMetaElement(this);
			this.appendChild(rootElement);
			OfficeMetaElement officeMetaElement = new OfficeMetaElement(this);
			rootElement.appendChild(officeMetaElement);
		}
	}

	/** Might be used to initialize specific XML Namespace prefixes/URIs for this XML file*/
	@Override
	protected void initialize() {
		for (NamespaceName name : OdfDocumentNamespace.values()) {
			mUriByPrefix.put(name.getPrefix(), name.getUri());
			mPrefixByUri.put(name.getUri(), name.getPrefix());
		}
		super.initialize();
	}

	/**
	 * Retrieves the Odf Document
	 *
	 * @return The OdfDocument
	 */
	@Override
	public OdfSchemaDocument getDocument() {
		return (OdfSchemaDocument) mPackageDocument;
	}

	/**
	 * @return The root element  of the meta.xml file as OfficeDocumentMetaElement.
	 */
	@Override
	public final OfficeDocumentMetaElement getRootElement() {
		return (OfficeDocumentMetaElement) getDocumentElement();
	}

	/**
	 * Creates an JDK XPath instance.
	 * Initialized with ODF namespaces from OdfDocumentNamespace. Updated with all namespace of the XML file.
	 * @return an XPath instance with namespace context set to include the standard
	 * ODFDOM prefixes.
	 */
	@Override
	public XPath getXPath() {
		if (mXPath == null) {
			mXPath = XPathFactory.newInstance().newXPath();
			mXPath.setNamespaceContext(this);
			for (NamespaceName name : OdfDocumentNamespace.values()) {
				mUriByPrefix.put(name.getPrefix(), name.getUri());
				mPrefixByUri.put(name.getUri(), name.getPrefix());
			}
		}
		return mXPath;
	}
}