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From "Will Glass-Husain" <wglasshus...@gmail.com>
Subject Re: Problem working witth AnakiaTask
Date Tue, 23 Oct 2007 16:57:25 GMT
Hi Varsha,

What version of ant are you running?  What version of Anakia?  (1.0?)

Can you make a simple version of what you are trying to do?

WILL



On 20 Oct 2007 19:41:29 -0000, Varsha Kadam <varsha.kadam@rediffmail.com>
wrote:
>
>
> Hi,
>
> I am trying to transform axml file into text file using anakia,but getting
> error(NullPointerException) for directory scenning.I tried to fix the
> problem but could not do it.....
>
> Please help me.
>
> Exception description:
>
> Transforming into:
> C:\SonaliFolder\Sonali\Workspace\MyAnakia\..\MyAnakia\index.txt
>
> java.lang.NullPointerException
>         at
> org.apache.tools.ant.types.AbstractFileSet.setupDirectoryScanner(
> AbstractFileSet.java:464)
>         at org.apache.tools.ant.types.AbstractFileSet.getDirectoryScanner(
> AbstractFileSet.java:430)
>         at org.apache.tools.ant.taskdefs.MatchingTask.getDirectoryScanner(
> MatchingTask.java:192)
>         at org.apache.anakia.AnakiaTask.execute(AnakiaTask.java:322)
>         at org.apache.anakia.AnakiaTask.main(AnakiaTask.java:696)
>
>
> Modified AnakiaTask class:
>
> package org.apache.anakia;
>
> /*
> * Licensed to the Apache Software Foundation (ASF) under one
> * or more contributor license agreements.  See the NOTICE file
> * distributed with this work for additional information
> * regarding copyright ownership.  The ASF licenses this file
> * to you under the Apache License, Version 2.0 (the
> * "License"); you may not use this file except in compliance
> * with the License.  You may obtain a copy of the License at
> *
> *   http://www.apache.org/licenses/LICENSE-2.0
> *
> * Unless required by applicable law or agreed to in writing,
> * software distributed under the License is distributed on an
> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
> * KIND, either express or implied.  See the License for the
> * specific language governing permissions and limitations
> * under the License.
> */
>
> import java.io.BufferedWriter;
> import java.io.File;
> import java.io.FileOutputStream;
> import java.io.IOException;
> import java.io.OutputStreamWriter;
> import java.io.StringWriter;
> import java.io.Writer;
> import java.util.Iterator;
> import java.util.LinkedList;
> import java.util.List;
> import java.util.StringTokenizer;
>
> import org.apache.commons.collections.ExtendedProperties;
> import org.apache.tools.ant.BuildException;
> import org.apache.tools.ant.DirectoryScanner;
> import org.apache.tools.ant.Project;
> import org.apache.tools.ant.taskdefs.MatchingTask;
> import org.apache.velocity.Template;
> import org.apache.velocity.VelocityContext;
> import org.apache.velocity.app.Velocity;
> import org.apache.velocity.app.VelocityEngine;
> import org.apache.velocity.runtime.RuntimeConstants;
> import org.apache.velocity.util.StringUtils;
> import org.jdom.Document;
> import org.jdom.JDOMException;
> import org.jdom.input.SAXBuilder;
> import org.jdom.output.Format;
> import org.xml.sax.SAXParseException;
>
> /**
> * The purpose of this Ant Task is to allow you to use
> * Velocity as an XML transformation tool like XSLT is.
> * So, instead of using XSLT, you will be able to use this
> * class instead to do your transformations. It works very
> * similar in concept to Ant's <style> task.
> * <p>
> * You can find more documentation about this class on the
> * Velocity
> * <a href="http://velocity.apache.org/engine/devel/docs/anakia.html
> ">Website</a>.
> *
> * @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a>
> * @author <a href="mailto:szegedia@freemail.hu">Attila Szegedi</a>
> * @version $Id: AnakiaTask.java 524478 2007-03-31 20:51:49Z wglass $
> */
> public class AnakiaTask extends MatchingTask
> {
>     /** <code>{@link SAXBuilder}</code> instance to use */
>     SAXBuilder builder;
>
>     /** the destination directory */
>     private File destDir = null;
>
>     /** the base directory */
>     File baseDir = null;
>
>     /** the style= attribute */
>     private String style = null;
>
>     /** last modified of the style sheet */
>     private long styleSheetLastModified = 0;
>
>     /** the projectFile= attribute */
>     private String projectAttribute = null;
>
>     /** the File for the project.xml file */
>     private File projectFile = null;
>
>     /** last modified of the project file if it exists */
>     private long projectFileLastModified = 0;
>
>     /** check the last modified date on files. defaults to true */
>     private boolean lastModifiedCheck = true;
>
>     /** the default output extension is .html */
>     private String extension = ".html";
>
>     /** the template path */
>     private String templatePath = null;
>
>     /** the file to get the velocity properties file */
>     private File velocityPropertiesFile = null;
>
>     /** the VelocityEngine instance to use */
>     private VelocityEngine ve = new VelocityEngine();
>
>     /** the Velocity subcontexts */
>     private List contexts = new LinkedList();
>
>     /**
>      * Constructor creates the SAXBuilder.
>      */
>     public AnakiaTask()
>     {
>         builder = new SAXBuilder();
>         builder.setFactory(new AnakiaJDOMFactory());
>     }
>
>     /**
>      * Set the base directory.
>      * @param dir
>      */
>     public void setBasedir(File dir)
>     {
>         baseDir = dir;
>     }
>
>     /**
>      * Set the destination directory into which the VSL result
>      * files should be copied to
>      * @param dir the name of the destination directory
>      */
>     public void setDestdir(File dir)
>     {
>         destDir = dir;
>     }
>
>     /**
>      * Allow people to set the default output file extension
>      * @param extension
>      */
>     public void setExtension(String extension)
>     {
>         this.extension = extension;
>     }
>
>     /**
>      * Allow people to set the path to the .vsl file
>      * @param style
>      */
>     public void setStyle(String style)
>     {
>         this.style = style;
>     }
>
>     /**
>      * Allow people to set the path to the project.xml file
>      * @param projectAttribute
>      */
>     public void setProjectFile(String projectAttribute)
>     {
>         this.projectAttribute = projectAttribute;
>     }
>
>     /**
>      * Set the path to the templates.
>      * The way it works is this:
>      * If you have a Velocity.properties file defined, this method
>      * will <strong>override</strong> whatever is set in the
>      * Velocity.properties file. This allows one to not have to define
>      * a Velocity.properties file, therefore using Velocity's defaults
>      * only.
>      * @param templatePath
>      */
>
>     public void setTemplatePath(File templatePath)
>      {
>          try
>          {
>              this.templatePath = templatePath.getCanonicalPath();
>              System.out.println("template path is "+templatePath);
>          }
>          catch (java.io.IOException ioe)
>          {
>              throw new BuildException(ioe);
>          }
>      }
>
>     /**
>      * Allow people to set the path to the velocity.properties file
>      * This file is found relative to the path where the JVM was run.
>      * For example, if build.sh was executed in the ./build directory,
>      * then the path would be relative to this directory.
>      * This is optional based on the setting of setTemplatePath().
>      * @param velocityPropertiesFile
>      */
>     public void setVelocityPropertiesFile(File velocityPropertiesFile)
>     {
>         this.velocityPropertiesFile = velocityPropertiesFile;
>     }
>
>     /**
>      * Turn on/off last modified checking. by default, it is on.
>      * @param lastmod
>      */
>     public void setLastModifiedCheck(String lastmod)
>     {
>         if (lastmod.equalsIgnoreCase("false") || lastmod.equalsIgnoreCase
> ("no")
>                 || lastmod.equalsIgnoreCase("off"))
>         {
>             this.lastModifiedCheck = false;
>         }
>     }
>
>     /**
>      * Main body of the application
>      * @throws BuildException
>      */
>     public void execute () throws BuildException
>     {
>         DirectoryScanner scanner;
>         String[]         list;
>
>         if (baseDir == null)
>         {
>             baseDir = project.resolveFile(".");
>         }
>         if (destDir == null )
>         {
>             String msg = "destdir attribute must be set!";
>             throw new BuildException(msg);
>         }
>         if (style == null)
>         {
>             throw new BuildException("style attribute must be set!");
>         }
>
>         if (velocityPropertiesFile == null)
>         {
>             velocityPropertiesFile = new File("velocity.properties");
>         }
>
>         /*
>          * If the props file doesn't exist AND a templatePath hasn't
>          * been defined, then throw the exception.
>          */
>         if ( !velocityPropertiesFile.exists() && templatePath == null )
>         {
>             throw new BuildException ("No template path and could not " +
>                 "locate velocity.properties file: " +
>                 velocityPropertiesFile.getAbsolutePath());
>         }
>
>         log("Transforming into: " + destDir.getAbsolutePath(),
> Project.MSG_INFO);
>
>         // projectFile relative to baseDir
>         if (projectAttribute != null && projectAttribute.length() > 0)
>         {
>             projectFile = new File(baseDir, projectAttribute);
>             if (projectFile.exists())
>             {
>                 projectFileLastModified = projectFile.lastModified();
>             }
>             else
>             {
>                 log ("Project file is defined, but could not be located: "
> +
>                     projectFile.getAbsolutePath(), Project.MSG_INFO );
>                 projectFile = null;
>             }
>         }
>
>         Document projectDocument = null;
>         try
>         {
>             if ( velocityPropertiesFile.exists() )
>             {
>                 String file = velocityPropertiesFile.getAbsolutePath();
>                 System.out.println("velocityPropertiesFile.getAbsolutePath
> ()"+file);
>                 ExtendedProperties config = new ExtendedProperties(file);
>                 ve.setExtendedProperties(config);
>             }
>
>             // override the templatePath if it exists
>             if (templatePath != null && templatePath.length() > 0)
>             {
>                 System.out.println("teplate path and runtime constant
> is"+templatePath+RuntimeConstants.FILE_RESOURCE_LOADER_PATH);
>                ve.setProperty( RuntimeConstants.FILE_RESOURCE_LOADER_PATH,
>                   templatePath);
>                 System.out.println("
> RuntimeConstants.FILE_RESOURCE_LOADER_PATH
> "+RuntimeConstants.FILE_RESOURCE_LOADER_PATH);
>                 System.out.println("templatePath"+templatePath);
>                             }
>             //VelocityEngine vx=new VelocityEngine();
>             ve.init();
>             //vx.init();
>             //VelocityContext context = new VelocityContext();
>             //File f=new File("c:\\Files\\site.vsl");
>            // context.put("root",f);
>             // get the last modification of the VSL stylesheet
>             System.out.println("stylr is"+style);
>             Template template = ve.getTemplate(style);
>             System.out.println("template found here is"+template);
>             //template.merge(context, writer);
>             styleSheetLastModified = ve.getTemplate("site.vsl
> ").getLastModified();
>
>             // Build the Project file document
>             if (projectFile != null)
>             {
>                 projectDocument = builder.build(projectFile);
>             }
>         }
>         catch (Exception e)
>         {
>             log("Error: " + e.toString(), Project.MSG_INFO);
>             System.out.println("cause of exception
> is"+e.getCause()+e.getMessage());
>            Object ex=e.getClass();
>            System.out.println("Object is"+ex.toString()+ex.getClass());
>             throw new BuildException(e);
>         }
>
>         // find the files/directories
>         System.out.println("base dir"+baseDir);
>         scanner = getDirectoryScanner(baseDir);
>         System.out.println("scanner"+scanner);
>
>         // get a list of files to work on
>         list = scanner.getIncludedFiles();
>         for (int i = 0;i < list.length; ++i)
>         {
>             process(list[i], projectDocument );
>         }
>
>     }
>
>     /**
>      * Process an XML file using Velocity
>      */
>     private void process(String xmlFile, Document projectDocument)
>         throws BuildException
>     {
>         File   outFile=null;
>         File   inFile=null;
>         Writer writer = null;
>         try
>         {
>             // the current input file relative to the baseDir
>             inFile = new File(baseDir,xmlFile);
>             // the output file relative to basedir
>             outFile = new File(destDir,
>                             xmlFile.substring(0,
>                             xmlFile.lastIndexOf('.')) + extension);
>
>             // only process files that have changed
>             if (lastModifiedCheck == false ||
>                     (inFile.lastModified() > outFile.lastModified() ||
>                     styleSheetLastModified > outFile.lastModified() ||
>                     projectFileLastModified > outFile.lastModified() ||
>                     userContextsModifed(outFile.lastModified())))
>             {
>                 ensureDirectoryFor( outFile );
>
>                 //-- command line status
>                 log("Input:  " + xmlFile, Project.MSG_INFO );
>
>                 // Build the JDOM Document
>                 Document root = builder.build(inFile);
>
>                 // Shove things into the Context
>                 VelocityContext context = new VelocityContext();
>
>                 /*
>                  *  get the property TEMPLATE_ENCODING
>                  *  we know it's a string...
>                  */
>                 String encoding = (String) ve.getProperty(
> RuntimeConstants.OUTPUT_ENCODING );
>                 if (encoding == null || encoding.length() == 0
>                     || encoding.equals("8859-1") || encoding.equals
> ("8859_1"))
>                 {
>                     encoding = "ISO-8859-1";
>                 }
>
>                 Format f = Format.getRawFormat();
>                 f.setEncoding(encoding);
>
>                 OutputWrapper ow = new OutputWrapper(f);
>
>                 context.put ("root", root.getRootElement());
>                 context.put ("xmlout", ow );
>                 context.put ("relativePath", getRelativePath(xmlFile));
>                 context.put ("treeWalk", new TreeWalker());
>                 context.put ("xpath", new XPathTool() );
>                 context.put ("escape", new Escape() );
>                 context.put ("date", new java.util.Date() );
>
>                 /**
>                  * only put this into the context if it exists.
>                  */
>                 if (projectDocument != null)
>                 {
>                     context.put ("project", projectDocument.getRootElement
> ());
>                     System.out.println("context has put project ef
> with->"+projectDocument.getRootElement());
>                 }
>
>                 /**
>                  *  Add the user subcontexts to the to context
>                  */
>                 for (Iterator iter = contexts.iterator(); iter.hasNext();)
>                 {
>                     Context subContext = (Context) iter.next();
>                     if (subContext == null)
>                     {
>                         throw new BuildException("Found an undefined
> SubContext!");
>                     }
>
>                     if (subContext.getContextDocument() == null)
>                     {
>                         throw new BuildException("Could not build a
> subContext for " + subContext.getName());
>                     }
>
>                     context.put(subContext.getName(), subContext
>                             .getContextDocument().getRootElement());
>                 }
>
>                 /**
>                  * Process the VSL template with the context and write out
>                  * the result as the outFile.
>                  */
>                 writer = new BufferedWriter(new OutputStreamWriter(
>                                             new FileOutputStream(outFile),
>                                                 encoding));
>
>                 /**
>                  * get the template to process
>                  */
>                 Template template = ve.getTemplate(style);
>                 System.out.println("template found here is"+template);
>                 template.merge(context, writer);
>
>                 log("Output: " + outFile, Project.MSG_INFO );
>             }
>         }
>         catch (JDOMException e)
>         {
>             outFile.delete();
>
>             if (e.getCause() != null)
>             {
>                 Throwable rootCause = e.getCause();
>                 if (rootCause instanceof SAXParseException)
>                 {
>                     System.out.println("");
>                     System.out.println("Error: " + rootCause.getMessage
> ());
>                     System.out.println(
>                         "       Line: " +
>                             ((SAXParseException)rootCause).getLineNumber()
> +
>                         " Column: " +
>
>                             ((SAXParseException)rootCause).getColumnNumber());
>                     System.out.println("");
>                 }
>                 else
>                 {
>                     rootCause.printStackTrace();
>                 }
>             }
>             else
>             {
>                 e.printStackTrace();
>             }
>         }
>         catch (Throwable e)
>         {
>             if (outFile != null)
>             {
>                 outFile.delete();
>             }
>             e.printStackTrace();
>         }
>         finally
>         {
>             if (writer != null)
>             {
>                 try
>                 {
>                     writer.flush();
>                 }
>                 catch (IOException e)
>                 {
>                     // Do nothing
>                 }
>
>                 try
>                 {
>                     writer.close();
>                 }
>                 catch (IOException e)
>                 {
>                     // Do nothing
>                 }
>             }
>         }
>     }
>
>     /**
>      * Hacky method to figure out the relative path
>      * that we are currently in. This is good for getting
>      * the relative path for images and anchor's.
>      */
>     private String getRelativePath(String file)
>     {
>         if (file == null || file.length()==0)
>             return "";
>         StringTokenizer st = new StringTokenizer(file, "/\\");
>         // needs to be -1 cause ST returns 1 even if there are no matches.
> huh?
>         int slashCount = st.countTokens() - 1;
>         StringBuffer sb = new StringBuffer();
>         for (int i=0;i<slashCount ;i++ )
>         {
>             sb.append ("../");
>         }
>
>         if (sb.toString().length() > 0)
>         {
>             return StringUtils.chop(sb.toString(), 1);
>         }
>
>         return ".";
>     }
>
>     /**
>      * create directories as needed
>      */
>     private void ensureDirectoryFor( File targetFile ) throws
> BuildException
>     {
>         File directory = new File( targetFile.getParent() );
>         if (!directory.exists())
>         {
>             if (!directory.mkdirs())
>             {
>                 throw new BuildException("Unable to create directory: "
>                                          + directory.getAbsolutePath() );
>             }
>         }
>     }
>
>
>     /**
>      * Check to see if user context is modified.
>      */
>     private boolean userContextsModifed(long lastModified)
>     {
>         for (Iterator iter = contexts.iterator(); iter.hasNext();)
>         {
>             AnakiaTask.Context ctx = (AnakiaTask.Context) iter.next();
>             if(ctx.getLastModified() > lastModified)
>             {
>                 return true;
>             }
>         }
>         return false;
>     }
>
>     /**
>      * Create a new context.
>      * @return A new context.
>      */
>     public Context createContext()
>     {
>         Context context = new Context();
>         contexts.add(context);
>         return context;
>     }
>
>
>     /**
>      * A context implementation that loads all values from an XML file.
>      */
>     public class Context
>     {
>
>         private String name;
>         private Document contextDoc = null;
>         private String file;
>
>         /**
>          * Public constructor.
>          */
>         public Context()
>         {
>         }
>
>         /**
>          * Get the name of the context.
>          * @return The name of the context.
>          */
>         public String getName()
>         {
>             return name;
>         }
>
>         /**
>          * Set the name of the context.
>          * @param name
>          *
>          * @throws IllegalArgumentException if a reserved word is used as
> a
>          * name, specifically any of "relativePath", "treeWalk", "xpath",
>          * "escape", "date", or "project"
>          */
>         public void setName(String name)
>         {
>             if (name.equals("relativePath") ||
>                     name.equals("treeWalk") ||
>                     name.equals("xpath") ||
>                     name.equals("escape") ||
>                     name.equals("date") ||
>                     name.equals("project"))
>             {
>
>                     throw new IllegalArgumentException("Context name '" +
> name
>                             + "' is reserved by Anakia");
>             }
>
>             this.name = name;
>         }
>
>         /**
>          * Build the context based on a file path.
>          * @param file
>          */
>         public void setFile(String file)
>         {
>             this.file = file;
>         }
>
>         /**
>          * Retrieve the time the source file was last modified.
>          * @return The time the source file was last modified.
>          */
>         public long getLastModified()
>         {
>             return new File(baseDir, file).lastModified();
>         }
>
>         /**
>          * Retrieve the context document object.
>          * @return The context document object.
>          */
>         public Document getContextDocument()
>         {
>             if (contextDoc == null)
>             {
>                 File contextFile = new File(baseDir, file);
>
>                 try
>                 {
>                     contextDoc = builder.build(contextFile);
>                 }
>                 catch (Exception e)
>                 {
>                     throw new BuildException(e);
>                 }
>             }
>             return contextDoc;
>         }
>     }
>
>    public static void main(String args[])
>    {
>            try{
>            VelocityEngine vx=new VelocityEngine();
>            vx.init();
>            StringWriter w = new StringWriter();
>            //VelocityContext context = new VelocityContext();
>
>           // Velocity.mergeTemplate("site.vsl", "ISO-8859-1", context, w
> );
>           Template t= vx.getTemplate("//site.vsl");
>           System.out.println("tnnnnnnnnnn is"+t);
>            AnakiaTask at = new AnakiaTask();
>            File finput=new
> File("../MyAnakia");//C:\\SonaliFolder\\Sonali\\velocity-
> 1.5\\velocity-1.5\\examples\\anakia\\xdocs\\stylesheets");
>        at.setBasedir(finput);
>
>        File foutput=new File("../MyAnakia/index.txt");
>        at.setDestdir(foutput);
>        at.setExtension(".txt");
>        at.setLastModifiedCheck("off");
>        at.setProjectFile("project.xml");
>
>
>        at.setStyle("//site.vsl");
>
>
>
>        //System.out.println("Absolutue path is " +x.getAbsolutePath() );
>       // File ftemplate=new File("c:\\Files\\");
>        File ftemplate=new File("../MyAnakia");
>                 //"//MyTemplate.vm");
>        at.setTemplatePath(ftemplate);
>        at.execute();
>    }
>            catch(Exception e){
>                    System.out.println("exception in main
> is"+e.getMessage()+e.getCause()+e.getStackTrace());
>                    e.printStackTrace();
>            }
>    }
> }
>
> Thanks
> Varsha.




-- 
Forio Business Simulations

Will Glass-Husain
wglass@forio.com
www.forio.com

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