/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.xml;
import com.caucho.util.CharBuffer;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import java.io.IOException;
/**
* XMLWriter to create a SAX events.
*/
public class SAXBuilder implements XMLWriter, Locator {
private XMLReader _saxReader;
private ContentHandler _contentHandler;
private QAttributes _attributes;
private CharBuffer _text;
private boolean _escapeText;
private boolean _hasElement;
private String _elementUri;
private String _elementLocalName;
private String _elementQName;
private String _filename;
private int _line;
private String _elementSystemId;
private int _elementLine;
private Locator _locator;
public SAXBuilder()
{
_text = new CharBuffer();
_attributes = new QAttributes();
}
public SAXBuilder(XMLReader saxReader)
{
this();
init(saxReader);
}
public void init(XMLReader saxReader)
{
_saxReader = saxReader;
_contentHandler = saxReader.getContentHandler();
init();
}
public void init()
{
_text.clear();
_attributes.clear();
_hasElement = false;
_filename = null;
_line = 0;
}
/**
* Sets the SAX content handler.
*/
public void setContentHandler(ContentHandler handler)
{
_contentHandler = handler;
}
public void setDocumentLocator(Locator locator)
{
_locator = locator;
}
public void startDocument()
throws IOException, SAXException
{
_contentHandler.setDocumentLocator(this);
_contentHandler.startDocument();
}
public void endDocument()
throws IOException, SAXException
{
pop();
_contentHandler.endDocument();
}
public void setLocation(String filename, int line, int column)
{
_filename = filename;
_line = line;
}
/**
* Returns the current filename.
*/
public String getSystemId()
{
if (_elementSystemId != null)
return _elementSystemId;
else if (_locator != null)
return _locator.getSystemId();
else
return _filename;
}
/**
* Don't really have a public id (?).
*/
public String getPublicId()
{
if (_locator != null)
return _locator.getPublicId();
else
return null;
}
/**
* Returns the current line.
*/
public int getLineNumber()
{
if (_elementSystemId != null)
return _elementLine;
else if (_locator != null)
return _locator.getLineNumber();
else
return 0;
}
/**
* The column number is always 0.
*/
public int getColumnNumber()
{
if (_locator != null)
return _locator.getColumnNumber();
else
return 0;
}
/**
* Starts the building of an element.
*
* @param uri the element's namespace URI
* @param localName the element's local name
* @param qName the element's fully qualified name
*/
public void startElement(String uri, String localName, String qName)
throws IOException, SAXException
{
pop();
_elementUri = uri;
_elementLocalName = localName;
_elementQName = qName;
_hasElement = true;
if (_locator != null) {
_elementSystemId = _locator.getSystemId();
_elementLine = _locator.getLineNumber();
}
}
public void startPrefixMapping(String prefix, String uri)
throws IOException, SAXException
{
_contentHandler.startPrefixMapping(prefix, uri);
}
public void endPrefixMapping(String prefix)
throws IOException, SAXException
{
_contentHandler.endPrefixMapping(prefix);
}
public void attribute(String uri, String localName, String qName,
String value)
throws IOException, SAXException
{
QName name = new QName(qName, uri);
_attributes.add(name, value);
}
public void endElement(String uri, String localName, String qName)
throws IOException, SAXException
{
pop();
if (uri != null)
_contentHandler.endElement(uri, localName, qName);
else
_contentHandler.endElement("", null, qName);
}
public void processingInstruction(String name, String data)
throws IOException, SAXException
{
pop();
_contentHandler.processingInstruction(name, data);
}
public void comment(String data)
throws IOException, SAXException
{
pop();
}
public boolean getEscapeText()
{
return _escapeText;
}
public void setEscapeText(boolean isEscaped)
{
_escapeText = isEscaped;
}
public void text(String text)
throws IOException, SAXException
{
popElement();
_text.append(text);
}
public void text(char []buffer, int offset, int length)
throws IOException, SAXException
{
popElement();
_text.append(buffer, offset, length);
}
public void cdata(String text)
throws IOException, SAXException
{
popElement();
text(text);
}
public void cdata(char []buffer, int offset, int length)
throws IOException, SAXException
{
popElement();
text(buffer, offset, length);
}
private void pop()
throws IOException, SAXException
{
popElement();
if (_text.length() == 0)
return;
_contentHandler.characters(_text.getBuffer(), 0, _text.getLength());
_text.clear();
}
/**
* Completes the open element processing.
*/
private void popElement()
throws IOException, SAXException
{
if (_hasElement) {
if (_elementUri == null)
_contentHandler.startElement("", null, _elementQName, _attributes);
else
_contentHandler.startElement(_elementUri, _elementLocalName,
_elementQName, _attributes);
_hasElement = false;
_elementSystemId = null;
_attributes.clear();
}
}
}