/* eXist Native XML Database
* Copyright (C) 2000-03, Wolfgang M. Meier (wolfgang@exist-db.org)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This library 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. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Id$
*/
package org.exist.util.serializer;
import java.io.IOException;
import java.io.Writer;
import java.util.Properties;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.TransformerException;
import org.exist.dom.QName;
import org.exist.util.XMLString;
import org.exist.util.serializer.encodings.CharacterSet;
/**
* Write PLAIN TEXT to a writer. This class defines methods similar to SAX.
* It deals with opening and closing tags, writing attributes and so on: they
* are all ignored. Only real content is written!
*
* Note this is an initial version. Code cleanup needed. Original code is
* commented for fast repair.
*
* @author dizzz
* @author wolf
*/
public class TEXTWriter extends XMLWriter {
protected final static Properties defaultProperties = new Properties();
protected Writer writer = null;
protected CharacterSet charSet = null;
protected Properties outputProperties;
private char[] charref = new char[10];
public TEXTWriter() {
// empty
}
public TEXTWriter(final Writer writer) {
super();
this.writer = writer;
}
@Override
protected void reset() {
super.reset();
writer = null;
}
/**
* Set the output properties.
*
* @param properties outputProperties
*/
@Override
public void setOutputProperties(final Properties properties) {
if (properties == null) {
outputProperties = defaultProperties;
} else {
outputProperties = properties;
}
final String encoding = outputProperties.getProperty(OutputKeys.ENCODING, "UTF-8");
charSet = CharacterSet.getCharacterSet(encoding);
}
/**
* Set a new writer. Calling this method will reset the state of the object.
*
* @param writer
*/
@Override
public void setWriter(final Writer writer) {
this.writer = writer;
}
@Override
public void startDocument() throws TransformerException {
// empty
}
@Override
public void endDocument() throws TransformerException {
// empty
}
@Override
public void startElement(final String namespaceURI, final String localName, final String qname) throws TransformerException {
// empty
}
@Override
public void startElement(final QName qname) throws TransformerException {
// empty
}
@Override
public void endElement(final String namespaceURI, final String localName, final String qname) throws TransformerException {
// empty
}
@Override
public void endElement(final QName qname) throws TransformerException {
// empty
}
@Override
public void namespace(final String prefix, final String nsURI) throws TransformerException {
// empty
}
@Override
public void attribute(final String qname, final String value) throws TransformerException {
// empty
}
@Override
public void attribute(final QName qname, final String value) throws TransformerException {
// empty
}
@Override
public void characters(final CharSequence chars) throws TransformerException {
try {
writeChars(chars, false);
} catch(final IOException ioe) {
throw new TransformerException(ioe.getMessage(), ioe);
}
}
@Override
public void characters(final char[] ch, final int start, final int len) throws TransformerException {
final XMLString s = new XMLString(ch, start, len);
characters(s);
s.release();
}
@Override
public void processingInstruction(final String target, final String data) throws TransformerException {
// empty
}
@Override
public void comment(final CharSequence data) throws TransformerException {
// empty
}
@Override
public void cdataSection(final char[] ch, final int start, final int len) throws TransformerException {
try {
writer.write(ch, start, len);
} catch(final IOException ioe) {
throw new TransformerException(ioe.getMessage(), ioe);
}
}
@Override
public void documentType(final String name, final String publicId, final String systemId) throws TransformerException {
// empty
}
@Override
protected void closeStartTag(final boolean isEmpty) throws TransformerException {
// empty
}
@Override
protected void writeDeclaration() throws TransformerException {
// empty
}
@Override
protected void writeDoctype(final String rootElement) throws TransformerException {
// empty
}
private void writeChars(final CharSequence s, final boolean inAttribute) throws IOException {
final int len = s.length();
writeCharSeq(s, 0, len);
}
private void writeCharSeq(final CharSequence ch, final int start, final int end) throws IOException {
for (int i = start; i < end; i++) {
writer.write(ch.charAt(i));
}
}
@Override
protected void writeCharacterReference(final char charval) throws IOException {
int o = 0;
charref[o++] = '&';
charref[o++] = '#';
charref[o++] = 'x';
final String code = Integer.toHexString(charval);
final int len = code.length();
for(int k = 0; k < len; k++) {
charref[o++] = code.charAt(k);
}
charref[o++] = ';';
writer.write(charref, 0, o);
}
}