/*******************************************************************************
* Copyright (c) 1998, 2008 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.oxm.record;
import java.io.IOException;
import org.eclipse.persistence.exceptions.XMLMarshalException;
import org.eclipse.persistence.internal.helper.Helper;
import org.eclipse.persistence.internal.oxm.XPathFragment;
import org.eclipse.persistence.internal.oxm.record.XMLFragmentReader;
import org.eclipse.persistence.oxm.NamespaceResolver;
import org.eclipse.persistence.oxm.XMLConstants;
import org.w3c.dom.Attr;
import org.w3c.dom.Node;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
/**
* <p>Use this type of MarshalRecord when the marshal target is a Writer and the
* XML should be formatted with carriage returns and indenting.</p>
* <p><code>
* XMLContext xmlContext = new XMLContext("session-name");<br>
* XMLMarshaller xmlMarshaller = xmlContext.createMarshaller();<br>
* FormattedWriterRecord formattedWriterRecord = new FormattedWriterRecord();<br>
* formattedWriterRecord.setWriter(myWriter);<br>
* xmlMarshaller.marshal(myObject, formattedWriterRecord);<br>
* </code></p>
* <p>If the marshal(Writer) and setFormattedOutput(true) method is called on
* XMLMarshaller, then the Writer is automatically wrapped in a
* FormattedWriterRecord.</p>
* <p><code>
* XMLContext xmlContext = new XMLContext("session-name");<br>
* XMLMarshaller xmlMarshaller = xmlContext.createMarshaller();<br>
* xmlMarshaller xmlMarshaller.setFormattedOutput(true);<br>
* xmlMarshaller.marshal(myObject, myWriter);<br>
* </code></p>
* @see org.eclipse.persistence.oxm.XMLMarshaller
*/
public class FormattedWriterRecord extends WriterRecord {
private static final char[] TAB = " ".toCharArray();
private int numberOfTabs;
private boolean complexType;
private boolean isLastEventText;
public FormattedWriterRecord() {
super();
numberOfTabs = 0;
complexType = true;
isLastEventText = false;
}
/**
* INTERNAL:
*/
public void endDocument() {
try {
getWriter().write(Helper.cr());
} catch (IOException e) {
throw XMLMarshalException.marshalException(e);
}
}
/**
* INTERNAL:
*/
public void openStartElement(XPathFragment xPathFragment, NamespaceResolver namespaceResolver) {
this.addPositionalNodes(xPathFragment, namespaceResolver);
try {
if (isStartElementOpen) {
getWriter().write('>');
}
if (!isLastEventText) {
if (numberOfTabs > 0) {
getWriter().write(Helper.cr());
}
for (int x = 0; x < numberOfTabs; x++) {
getWriter().write(TAB);
}
}
isStartElementOpen = true;
getWriter().write('<');
getWriter().write(xPathFragment.getShortName());
numberOfTabs++;
isLastEventText = false;
} catch (IOException e) {
throw XMLMarshalException.marshalException(e);
}
}
/**
* INTERNAL:
*/
public void element(String namespaceURI, String localName, String qName) {
try {
isLastEventText = false;
if (isStartElementOpen) {
getWriter().write('>');
isStartElementOpen = false;
}
getWriter().write(Helper.cr());
for (int x = 0; x < numberOfTabs; x++) {
getWriter().write(TAB);
}
super.element(namespaceURI, localName, qName);
} catch (IOException e) {
throw XMLMarshalException.marshalException(e);
}
}
/**
* INTERNAL:
*/
public void endElement(XPathFragment xPathFragment, NamespaceResolver namespaceResolver) {
try {
isLastEventText = false;
numberOfTabs--;
if (isStartElementOpen) {
getWriter().write('/');
getWriter().write('>');
isStartElementOpen = false;
return;
}
if (complexType) {
getWriter().write(Helper.cr());
for (int x = 0; x < numberOfTabs; x++) {
getWriter().write(TAB);
}
} else {
complexType = true;
}
super.endElement(xPathFragment, namespaceResolver);
} catch (IOException e) {
throw XMLMarshalException.marshalException(e);
}
}
/**
* INTERNAL:
*/
public void characters(String value) {
super.characters(value);
isLastEventText = true;
complexType = false;
}
/**
* INTERNAL:
*/
public void cdata(String value) {
//Format the CDATA on it's own line
try {
if(isStartElementOpen) {
getWriter().write('>');
isStartElementOpen = false;
}
getWriter().write(Helper.cr());
for (int x = 0; x < numberOfTabs; x++) {
getWriter().write(TAB);
}
super.cdata(value);
complexType=true;
}catch(IOException ex) {
throw XMLMarshalException.marshalException(ex);
}
}
/**
* Receive notification of a node.
* @param node The Node to be added to the document
* @param namespaceResolver The NamespaceResolver can be used to resolve the
* namespace URI/prefix of the node
*/
public void node(Node node, NamespaceResolver namespaceResolver) {
if (node.getNodeType() == Node.ATTRIBUTE_NODE) {
Attr attr = (Attr) node;
String resolverPfx = null;
if (namespaceResolver != null) {
resolverPfx = namespaceResolver.resolveNamespaceURI(attr.getNamespaceURI());
}
// If the namespace resolver contains a prefix for the attribute's URI,
// use it instead of what is set on the attribute
if (resolverPfx != null) {
attribute(attr.getNamespaceURI(), "", resolverPfx+":"+attr.getLocalName(), attr.getNodeValue());
} else {
attribute(attr.getNamespaceURI(), "", attr.getName(), attr.getNodeValue());
// May need to declare the URI locally
if (attr.getNamespaceURI() != null) {
attribute(XMLConstants.XMLNS_URL, "",XMLConstants.XMLNS + ":" + attr.getPrefix(), attr.getNamespaceURI());
}
}
} else {
try {
FormattedWriterRecordContentHandler wrcHandler = new FormattedWriterRecordContentHandler();
XMLFragmentReader xfragReader = new XMLFragmentReader(namespaceResolver);
xfragReader.setContentHandler(wrcHandler);
xfragReader.setProperty("http://xml.org/sax/properties/lexical-handler", wrcHandler);
xfragReader.parse(node);
} catch (SAXException sex) {
throw XMLMarshalException.marshalException(sex);
}
}
}
/**
* This class will typically be used in conjunction with an XMLFragmentReader.
* The XMLFragmentReader will walk a given XMLFragment node and report events
* to this class - the event's data is then written to the enclosing class'
* writer.
*
* @see org.eclipse.persistence.internal.oxm.record.XMLFragmentReader
* @see org.eclipse.persistence.oxm.record.WriterRecord.WriterRecordContentHandler
*/
private class FormattedWriterRecordContentHandler extends WriterRecordContentHandler {
// --------------------- CONTENTHANDLER METHODS --------------------- //
public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
try {
if (isStartElementOpen) {
getWriter().write('>');
}
if (!isLastEventText) {
getWriter().write(Helper.cr());
for (int x = 0; x < numberOfTabs; x++) {
getWriter().write(TAB);
}
}
getWriter().write('<');
getWriter().write(qName);
numberOfTabs++;
isStartElementOpen = true;
isLastEventText = false;
// Handle attributes
handleAttributes(atts);
// Handle prefix mappings
writePrefixMappings();
} catch (IOException e) {
throw XMLMarshalException.marshalException(e);
}
}
public void endElement(String namespaceURI, String localName, String qName) throws SAXException {
try {
isLastEventText = false;
numberOfTabs--;
if (isStartElementOpen) {
getWriter().write('/');
getWriter().write('>');
isStartElementOpen = false;
complexType = true;
return;
}
if (complexType) {
getWriter().write(Helper.cr());
for (int x = 0; x < numberOfTabs; x++) {
getWriter().write(TAB);
}
} else {
complexType = true;
}
super.endElement(namespaceURI, localName, qName);
} catch (IOException e) {
throw XMLMarshalException.marshalException(e);
}
}
public void characters(char[] ch, int start, int length) throws SAXException {
if (isProcessingCData) {
cdata(new String (ch, start, length));
return;
}
if (new String(ch).trim().length() == 0) {
return;
}
super.characters(ch, start, length);
isLastEventText = true;
complexType = false;
}
// --------------------- LEXICALHANDLER METHODS --------------------- //
public void comment(char[] ch, int start, int length) throws SAXException {
try {
if (isStartElementOpen) {
getWriter().write('>');
getWriter().write(Helper.cr());
isStartElementOpen = false;
}
writeComment(ch, start, length);
complexType = false;
} catch (IOException e) {
throw XMLMarshalException.marshalException(e);
}
}
}
}