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From dona...@apache.org
Subject cvs commit: jakarta-ant/src/main/org/apache/tools/ant/taskdefs/optional/extension JarLibDisplayTask.java
Date Mon, 22 Apr 2002 13:33:37 GMT
donaldp     02/04/22 06:33:37

  Added:       src/main/org/apache/tools/ant/taskdefs/optional/extension
                        JarLibDisplayTask.java
  Log:
  Add in task that will display specification
  and extension information about jars/libraries.
  
  Revision  Changes    Path
  1.1                  jakarta-ant/src/main/org/apache/tools/ant/taskdefs/optional/extension/JarLibDisplayTask.java
  
  Index: JarLibDisplayTask.java
  ===================================================================
  /*
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2002 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "The Jakarta Project", "Ant", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Group.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  package org.apache.tools.ant.taskdefs.optional.extension;
  
  import java.io.File;
  import java.util.Iterator;
  import java.util.Vector;
  import org.apache.tools.ant.BuildException;
  import org.apache.tools.ant.DirectoryScanner;
  import org.apache.tools.ant.Task;
  import org.apache.tools.ant.types.FileSet;
  
  /**
   * Display the "Optional Package" and "Package Specification" information
   * contained within the specified jars.
   *
   * <p>Prior to JDK1.3, an "Optional Package" was known as an Extension.
   * The specification for this mechanism is available in the JDK1.3
   * documentation in the directory
   * $JDK_HOME/docs/guide/extensions/versioning.html. Alternatively it is
   * available online at <a href="http://java.sun.com/j2se/1.3/docs/guide/extensions/versioning.html">
   * http://java.sun.com/j2se/1.3/docs/guide/extensions/versioning.html</a>.</p>
   *
   * @author <a href="mailto:peter@apache.org">Peter Donald</a>
   * @ant.task name="jarlib-display"
   */
  public class JarLibDisplayTask
      extends Task
  {
      /**
       * The library to display information about.
       */
      private File m_file;
  
      /**
       * Filesets specifying all the librarys
       * to display information about.
       */
      private final Vector m_filesets = new Vector();
  
      /**
       * The jar library to display information for.
       *
       * @param file The jar library to display information for.
       */
      public void setFile( final File file )
      {
          m_file = file;
      }
  
      /**
       * Adds a set of files about which library data will be displayed.
       *
       * @param fileSet a set of files about which library data will be displayed.
       */
      public void addFileset( final FileSet fileSet )
      {
          m_filesets.addElement( fileSet );
      }
  
      public void execute()
          throws BuildException
      {
          validate();
  
          final LibraryDisplayer displayer = new LibraryDisplayer();
          // Check if list of files to check has been specified
          if( !m_filesets.isEmpty() )
          {
              final Iterator iterator = m_filesets.iterator();
              while( iterator.hasNext() )
              {
                  final FileSet fileSet = (FileSet)iterator.next();
                  final DirectoryScanner scanner = fileSet.getDirectoryScanner( getProject()
);
                  final File basedir = scanner.getBasedir();
                  final String[] files = scanner.getIncludedFiles();
                  for( int i = 0; i < files.length; i++ )
                  {
                      final File file = new File( basedir, files[ i ] );
                      displayer.displayLibrary( file );
                  }
              }
          }
          else
          {
              displayer.displayLibrary( m_file );
          }
      }
  
      /**
       * Validate the tasks parameters.
       *
       * @throws BuildException if invalid parameters found
       */
      private void validate()
          throws BuildException
      {
          if( null == m_file && m_filesets.isEmpty() )
          {
              final String message = "File attribute not specified.";
              throw new BuildException( message );
          }
          if( null != m_file && !m_file.exists() )
          {
              final String message = "File '" + m_file + "' does not exist.";
              throw new BuildException( message );
          }
          if( null != m_file && !m_file.isFile() )
          {
              final String message = "\'" + m_file + "\' is not a file.";
              throw new BuildException( message );
          }
      }
  }
  
  
  

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