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From mcconn...@apache.org
Subject cvs commit: avalon-sandbox/merlin/composition-spi/src/java/org/apache/avalon/composition/util StringHelper.java
Date Sat, 23 Aug 2003 17:15:49 GMT
mcconnell    2003/08/23 10:15:49

  Added:       merlin/composition-spi/src/java/org/apache/avalon/composition/util
                        StringHelper.java
  Log:
  A utility class that provides support for improved presentation of log messsages.
  
  Revision  Changes    Path
  1.1                  avalon-sandbox/merlin/composition-spi/src/java/org/apache/avalon/composition/util/StringHelper.java
  
  Index: StringHelper.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 acknowledgment:
   *    "This product includes software developed by the
   *    Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software
   *    itself, if and wherever such third-party acknowledgments
   *    normally appear.
   *
   * 4. The names "Jakarta", "Avalon", 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 name, without prior written
   *    permission of the Apache Software Foundation.
   *
   * 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.avalon.composition.util;
  
  import java.io.File;
  import java.net.URL;
  
  /**
   * General utilities supporting the packaging of string containing file references.
   * @author <a href="mailto:mcconnell@osm.net">Stephen McConnell</a>
   */
  public class StringHelper
  {
      private static final String USER_DIR = getUserDir();
      private static final String MERLIN_HOME = getMerlinHome();
      private static final String MERLIN_REPO_LOCAL = getRepositoryLocal();
  
      public static String toString( String name )
      {
          if( name == null ) return "";
          String str = name.replace( '\\', '/' );
          if( str.indexOf( USER_DIR ) > -1 )
          {
              str = getString( str, USER_DIR, "${user.dir}" );
          }
          if( ( MERLIN_HOME != null ) && str.indexOf( MERLIN_HOME ) > -1 )
          {
              str = getString( str, MERLIN_HOME, "${merlin.home}" );
          }
          if( ( MERLIN_REPO_LOCAL != null ) && str.indexOf( MERLIN_REPO_LOCAL ) >
-1 )
          {
              str = getString( str, MERLIN_REPO_LOCAL, "${merlin.repository.local}" );
          }
          return str;
      }
  
      public static String toString( File file )
      {
          if( file == null ) return "";
          return toString( file.toString() );
      }
  
      public static String toString( URL url )
      {
          if( url == null ) return "";
          return toString( url.toString() );
      }
  
      public static String toString( URL[] urls )
      {
          StringBuffer buffer = new StringBuffer();
          for( int i=0; i<urls.length; i++ )
          {
              buffer.append( toString( urls[i] ) );
              if( ( i > 0 ) && ( i < ( urls.length -1 ) ) )
              {
                  buffer.append( ", " );
              }
          }
          return buffer.toString();
      }
  
      public static String toString( String[] names )
      {
          StringBuffer buffer = new StringBuffer();
          for( int i=0; i<names.length; i++ )
          {
              if( ( i > 0 ) && ( i < ( names.length -1 ) ) )
              {
                  buffer.append( ", " );
              }
              buffer.append( toString( names[i] ) );
          }
          return buffer.toString();
      }
  
      private static String getString( String name, String pattern, String replacement )
      {
          final int n = name.indexOf( pattern );
          if( n == -1 ) return name;
          if( name.startsWith( pattern ) )
          {
              return replacement + name.substring( pattern.length() );
          }
          else
          {
              String header = name.substring( 0, n );
              String tail = name.substring( n + pattern.length() );
              return header + replacement + tail; 
          }
      }
  
      private static String getUserDir()
      {
           return System.getProperty( "user.dir" ).replace( '\\', '/' );
      }
  
      private static String getMerlinHome()
      {
           String home = System.getProperty( "merlin.home" );
           if( home == null ) return null;
           return home.replace( '\\', '/' );
      }
  
      private static String getRepositoryLocal()
      {
           String local = System.getProperty( "merlin.repository.local" );
           if( local== null ) return null;
           return local.replace( '\\', '/' );
      }
  
  
  }
  
  
  

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