XSL transformations: It applies a transformation to a set of employee records : Transform « XML « Java





XSL transformations: It applies a transformation to a set of employee records

XSL transformations: It applies a transformation to a set of employee records
    

/*
   This program is a part of the companion code for Core Java 8th ed.
   (http://horstmann.com/corejava)

   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 3 of the License, or
   (at your option) 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, see <http://www.gnu.org/licenses/>.
*/

import java.io.*;
import java.util.*;
import javax.xml.transform.*;
import javax.xml.transform.sax.*;
import javax.xml.transform.stream.*;
import org.xml.sax.*;
import org.xml.sax.helpers.*;

/**
 * This program demonstrates XSL transformations. It applies a transformation to a set of employee
 * records. The records are stored in the file employee.dat and turned into XML format. Specify the
 * stylesheet on the command line, e.g. java TransformTest makeprop.xsl
 * @version 1.01 2007-06-25
 * @author Cay Horstmann
 */
public class TransformTest
{
   public static void main(String[] args) throws Exception
   {
      String filename;
      if (args.length > 0) filename = args[0];
      else filename = "makehtml.xsl";
      File styleSheet = new File(filename);
      StreamSource styleSource = new StreamSource(styleSheet);

      Transformer t = TransformerFactory.newInstance().newTransformer(styleSource);     
      t.setOutputProperty(OutputKeys.INDENT, "yes");
      t.setOutputProperty(OutputKeys.METHOD, "xml");      
      t.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");

      t.transform(new SAXSource(new EmployeeReader(), new InputSource(new FileInputStream(
            "employee.dat"))), new StreamResult(System.out));
   }
}

/**
 * This class reads the flat file employee.dat and reports SAX parser events to act as if it was
 * parsing an XML file.
 */
class EmployeeReader implements XMLReader
{
   public void parse(InputSource source) throws IOException, SAXException
   {
      InputStream stream = source.getByteStream();
      BufferedReader in = new BufferedReader(new InputStreamReader(stream));
      String rootElement = "staff";
      AttributesImpl atts = new AttributesImpl();

      if (handler == null) throw new SAXException("No content handler");

      handler.startDocument();
      handler.startElement("", rootElement, rootElement, atts);
      String line;
      while ((line = in.readLine()) != null)
      {
         handler.startElement("", "employee", "employee", atts);
         StringTokenizer t = new StringTokenizer(line, "|");

         handler.startElement("", "name", "name", atts);
         String s = t.nextToken();
         handler.characters(s.toCharArray(), 0, s.length());
         handler.endElement("", "name", "name");

         handler.startElement("", "salary", "salary", atts);
         s = t.nextToken();
         handler.characters(s.toCharArray(), 0, s.length());
         handler.endElement("", "salary", "salary");

         atts.addAttribute("", "year", "year", "CDATA", t.nextToken());
         atts.addAttribute("", "month", "month", "CDATA", t.nextToken());
         atts.addAttribute("", "day", "day", "CDATA", t.nextToken());
         handler.startElement("", "hiredate", "hiredate", atts);
         handler.endElement("", "hiredate", "hiredate");
         atts.clear();

         handler.endElement("", "employee", "employee");
      }

      handler.endElement("", rootElement, rootElement);
      handler.endDocument();
   }

   public void setContentHandler(ContentHandler newValue)
   {
      handler = newValue;
   }

   public ContentHandler getContentHandler()
   {
      return handler;
   }

   // the following methods are just do-nothing implementations
   public void parse(String systemId) throws IOException, SAXException
   {
   }

   public void setErrorHandler(ErrorHandler handler)
   {
   }

   public ErrorHandler getErrorHandler()
   {
      return null;
   }

   public void setDTDHandler(DTDHandler handler)
   {
   }

   public DTDHandler getDTDHandler()
   {
      return null;
   }

   public void setEntityResolver(EntityResolver resolver)
   {
   }

   public EntityResolver getEntityResolver()
   {
      return null;
   }

   public void setProperty(String name, Object value)
   {
   }

   public Object getProperty(String name)
   {
      return null;
   }

   public void setFeature(String name, boolean value)
   {
   }

   public boolean getFeature(String name)
   {
      return false;
   }

   private ContentHandler handler;
}



//File: makehtml.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 method="html"/>

   <xsl:template match="/staff">
      <table border="1"><xsl:apply-templates/></table>
   </xsl:template>

   <xsl:template match="/staff/employee">
      <tr><xsl:apply-templates/></tr>
   </xsl:template>

   <xsl:template match="/staff/employee/name">
      <td><xsl:apply-templates/></td>
   </xsl:template>

   <xsl:template match="/staff/employee/salary">
      <td>$<xsl:apply-templates/></td>
   </xsl:template>

   <xsl:template match="/staff/employee/hiredate">
      <td><xsl:value-of select="@year"/>-<xsl:value-of 
      select="@month"/>-<xsl:value-of select="@day"/></td>
   </xsl:template>

</xsl:stylesheet>

//File: makeprop.xsl


<?xml version="1.0"?>

<xsl:stylesheet 
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
   version="1.0">

   <xsl:output method="text"/>

   <xsl:template match="/staff/employee">
employee.<xsl:value-of select="position()"/>.name=<xsl:value-of select="name/text()"/>
employee.<xsl:value-of select="position()"/>.salary=<xsl:value-of select="salary/text()"/>
employee.<xsl:value-of select="position()"/>.hiredate=<xsl:value-of select="hiredate/@year"/>-<xsl:value-of select="hiredate/@month"/>-<xsl:value-of select="hiredate/@day"/>
   </xsl:template>

</xsl:stylesheet>



//File: employee.dat

Carl Cracker|75000.0|1987|12|15
Harry Hacker|50000.0|1989|10|1
Tony Tester|40000.0|1990|3|15

   
    
    
    
  










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