Hi, i'm having some doubts about the way the sax events are created in a
transformer in java...
I'm asking this question because i wrote a transformer in java, but i want
to apply another transformer in xsl after that and i can't access the
attributes in the nodes...
this is the code of the transformer i wrote..
package pt.laseeb.dae.transformer;
/*
* File: daeTransformer.java
*
* Project: Design Automatico e Evolutivo
*
* Authors: Paulo Sérgio Silva Paixao - [EMAIL PROTECTED]
* Miguel Angelo Rodrigues Carvalho - [EMAIL PROTECTED]
*
* Date: 4/Ago/2003
*
* Trabalho de Fim de Curso - Design Automático e Evolutivo
*
* This program 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 any later version.
*
* This program 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 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.
*
*/
import org.apache.cocoon.transformation.AbstractTransformer;
import org.apache.cocoon.environment.SourceResolver;
import org.apache.cocoon.ProcessingException;
import org.apache.avalon.framework.parameters.Parameters;
import org.xml.sax.SAXException;
import org.xml.sax.Attributes;
import org.xml.sax.helpers.AttributesImpl;
import java.util.Map;
import java.io.IOException;
public class daeTransformer extends AbstractTransformer
{
public static final String DOCUMENT_ELEMENT = "document";
public static final String CONTENT_ELEMENT = "contents";
public static final String ARTICLE_ELEMENT = "article";
public static final String ARTICLE_TITLE_ELEMENT = "title";
public static final String ARTICLE_TEXT_ELEMENT = "text";
public static final String ARTICLE_IMAGE_ELEMENT = "image";
protected static final int MODE_NONE = 0;
protected static final int MODE_ARTICLE = 1;
protected static final int MODE_TITLE = 2;
protected static final int MODE_TEXT = 3;
protected static final int MODE_IMAGE = 4;
protected int mode;
protected StringBuffer articleText;
protected StringBuffer articleTitle;
protected StringBuffer articleImage;
protected Attributes attr;
public void setup(SourceResolver resolver, Map objectModel, String src,
Parameters par)
throws ProcessingException, SAXException, IOException
{
this.mode = MODE_NONE;
this.articleImage = new StringBuffer();
this.articleTitle = new StringBuffer();
this.articleText = new StringBuffer();
}
public void startElement(String namespaceURI, String localName, String
qName,
Attributes attributes) throws SAXException
{
AttributesImpl newAttr = new AttributesImpl();
if (localName.equals(DOCUMENT_ELEMENT) == true)
{
super.startElement("", localName , qName, newAttr);
}
else if (localName.equals(CONTENT_ELEMENT) == true)
{
super.startElement("", localName , qName, newAttr);
}
else if (localName.equals(ARTICLE_ELEMENT) == true)
{
newAttr.addAttribute("", localName, "layouttype", "", "2");
newAttr.addAttribute("", localName, "xpos", "", "5");
newAttr.addAttribute("", localName, "ypos", "", "7");
newAttr.addAttribute("", localName, "border", "", "dotted");
super.startElement("", localName, qName, newAttr);
}
else if (localName.equals(ARTICLE_TITLE_ELEMENT) == true)
{
this.mode = MODE_TITLE;
super.startElement("", localName, qName, newAttr);
}
else if (localName.equals(ARTICLE_TEXT_ELEMENT) == true)
{
this.mode = MODE_TEXT;
super.startElement("", localName, qName, attributes);
}
else if (localName.equals(ARTICLE_IMAGE_ELEMENT) == true)
{
this.mode = MODE_IMAGE;
super.startElement("", localName, qName, attributes);
}
else
{
throw new SAXException("Unknown start element " +
localName);
}
}
public void characters(char[] buffer, int start, int length)
throws SAXException
{
switch (this.mode)
{
case MODE_NONE : super.characters(buffer, start, length);
break;
case MODE_TITLE : this.articleTitle.append(buffer, start,
length);
break;
case MODE_TEXT : this.articleText.append(buffer, start, length);
break;
case MODE_IMAGE : this.articleImage.append(buffer, start,
length);
break;
}
}
public void endElement(String namespaceURI, String localName, String
qName)
throws SAXException {
if (localName.equals(DOCUMENT_ELEMENT) == true)
{
super.endElement("", localName , qName);
}
else if (localName.equals(CONTENT_ELEMENT) == true)
{
super.endElement("", localName, qName);
}
else if (localName.equals(ARTICLE_ELEMENT) == true)
{
super.endElement("", localName, qName);
} else if (localName.equals(ARTICLE_TITLE_ELEMENT) == true)
{
// mailto received
super.characters(this.articleTitle.toString().toCharArray(),
0, this.articleTitle.length());
this.articleTitle = null;
this.articleTitle = new StringBuffer();
super.endElement("", localName, qName);
this.mode = MODE_NONE;
} else if (localName.equals(ARTICLE_TEXT_ELEMENT) == true)
{
super.characters(this.articleText.toString().toCharArray(),
0, this.articleText.length());
this.articleText = null;
this.articleText = new StringBuffer();
super.endElement("", localName, qName);
this.mode = MODE_NONE;
} else if (localName.equals(ARTICLE_IMAGE_ELEMENT) == true)
{
super.characters(this.articleImage.toString().toCharArray(),
0, this.articleImage.length());
this.articleImage = null;
this.articleImage = new StringBuffer();
super.endElement("", localName, qName);
this.mode = MODE_NONE;
} else
{
throw new SAXException("Unknown end element " + localName);
}
}
}
and the result of this transformer is something like ...
<document>
<contents>
<article layouttype="2" xpos="5" ypos="7" border="dotted">
<title>Titulo com rating 2</title>
<text>Texto</text>
</article>
<article layouttype="2" xpos="5" ypos="7" border="dotted">
<title>Titulo do artigo com rating igual a 1</title>
<text>texto do artigo com rating igual a 1</text>
<image>img1.jpg</image>
</article>
<article layouttype="2" xpos="5" ypos="7" border="dotted">
<title>Titulo do artigo com rating igual a 2</title>
<text>texto do artigo com rating igual a 2</text>
<image>img1.jpg</image>
</article>
<article layouttype="2" xpos="5" ypos="7" border="dotted">
<title>Titulo do artigo com rating igual a 2</title>
<text>texto do artigo com rating igual a 2</text>
<image>img1.jpg</image>
</article>
</contents>
</document>
and after that i would like to apply a xsl stylesheet that can access some
of the properties available in the nodes, this is the code of the xsl
<?xml version="1.0" encoding="iso-8859-1"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
version="1.0">
<xsl:output type="html"/>
<xsl:template match="/">
<xsl:apply-templates select="*"/>
</xsl:template>
<xsl:template match="contents">
contents
<HTML>
<HEAD>
</HEAD>
<BODY>
<xsl:apply-templates select="[EMAIL PROTECTED]'2']"/>
</BODY>
</HTML>
</xsl:template>
<xsl:template match="border">
border
</xsl:template>
<xsl:template match="article">
article
<xsl:value-of select="title"/>
<xsl:value-of select="text"/>
<img>
<xsl:attribute name="src">
<xsl:value-of select="image"/>
</xsl:attribute>
</img>
</xsl:template>
</xsl:stylesheet>
but i can't access the attributes of the nodes...
If anyone has some ideas of why this might be hapenning it would be a very
good help..
thanks in advance
Miguel Carvalho
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