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/*******************************************************************************
* Copyright (c) 2006, 2015 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.help.internal.dynamic;
import java.io.ByteArrayOutputStream;
import java.io.UnsupportedEncodingException;
import java.util.Properties;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.eclipse.help.internal.UAElement;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;
import org.w3c.dom.Element;
public class DocumentWriter {
private Transformer transformer;
public String writeString(UAElement element, boolean xmlDecl) throws TransformerException, TransformerConfigurationException {
return writeString(element.getElement(), xmlDecl);
}
public String writeString(Element element, boolean xmlDecl) throws TransformerException, TransformerConfigurationException {
byte[] bytes = writeBytes(element, xmlDecl);
String encoding = transformer.getOutputProperty(OutputKeys.ENCODING);
if (encoding == null) {
encoding = "UTF-8"; //$NON-NLS-1$
}
try {
return new String(bytes, encoding);
}
catch (UnsupportedEncodingException e) {
return new String(bytes);
}
}
public byte[] writeBytes(UAElement element, boolean xmlDecl) throws TransformerException, TransformerConfigurationException {
return writeBytes(element.getElement(), xmlDecl);
}
public byte[] writeBytes(Element element, boolean xmlDecl) throws TransformerException, TransformerConfigurationException {
Document document = element.getOwnerDocument();
if (transformer == null) {
TransformerFactory factory = TransformerFactory.newInstance();
transformer = factory.newTransformer();
transformer.setOutputProperty(OutputKeys.METHOD, "xml"); //$NON-NLS-1$
}
DocumentType docType = document.getDoctype();
Properties props = transformer.getOutputProperties();
if (docType != null) {
props.setProperty(OutputKeys.DOCTYPE_PUBLIC, docType.getPublicId());
props.setProperty(OutputKeys.DOCTYPE_SYSTEM, docType.getSystemId());
}
else {
props.remove(OutputKeys.DOCTYPE_PUBLIC);
props.remove(OutputKeys.DOCTYPE_SYSTEM);
}
props.setProperty(OutputKeys.OMIT_XML_DECLARATION, xmlDecl ? "no" : "yes"); //$NON-NLS-1$ //$NON-NLS-2$
transformer.setOutputProperties(props);
DOMSource source = new DOMSource(element);
ByteArrayOutputStream out = new ByteArrayOutputStream();
StreamResult result = new StreamResult(out);
transformer.transform(source, result);
return out.toByteArray();
}
}
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