[Nice-commit] Nice/src/nice/tools/locator path.nice,NONE,1.1 main.nice,NONE,1.1 locator.nice,NONE,1.1

[Daniel B. <bo...@us...>]

Update of /cvsroot/nice/Nice/src/nice/tools/locator
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv14796/src/nice/tools/locator

Added Files:
	path.nice main.nice locator.nice 
Log Message:
Abstracted the resource location in pathes in the nice.tools.locator package.


--- NEW FILE: main.nice ---
/**************************************************************************/
/*                                N I C E                                 */
/*             A high-level object-oriented research language             */
/*                        (c) Daniel Bonniot 2004                         */
/*                                                                        */
/*  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     */
/*  (at your option) any later version.                                   */
/*                                                                        */
/**************************************************************************/

package nice.tools.locator;

import java.net.*;

/**
   A locator finds resources based on given path.

   @author Daniel Bonniot (bo...@us...)
 */

public class Locator
{
  final URL[] path;

  ?URLConnection get(String resource);

  toString() = this.getClass.getName + ": " Arrays.asList(path).toString();
}

new Locator(String path, String->void warning) =
  this(path: parsePath(path, warning));

--- NEW FILE: locator.nice ---
/**************************************************************************/
/*                                N I C E                                 */
/*             A high-level object-oriented research language             */
/*                        (c) Daniel Bonniot 2004                         */
/*                                                                        */
/*  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     */
/*  (at your option) any later version.                                   */
/*                                                                        */
/**************************************************************************/

package nice.tools.locator;

/**
   Implementation of the locator.

   @author Daniel Bonniot (bo...@us...)
 */

get(Locator this, String resource)
{
  for (URL base : this.path) {
    try {
      let url = new URL(base, resource);
      let connection = url.openConnection();
      connection.connect();
      return connection;
    }
    catch(java.io.IOException e) {}
  }
  return null;
}

--- NEW FILE: path.nice ---
/**************************************************************************/
/*                                N I C E                                 */
/*             A high-level object-oriented research language             */
/*                        (c) Daniel Bonniot 2004                         */
/*                                                                        */
/*  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     */
/*  (at your option) any later version.                                   */
/*                                                                        */
/**************************************************************************/

package nice.tools.locator;

/**
   Handle string representations of a path.

   @author Daniel Bonniot (bo...@us...)
 */

public URL[] parsePath(String path, String->void warning)
{
  List<URL> components = new ArrayList();

  int start = 0;
  // skip starting separators
  while (start < path.length() &&
	 path.charAt(start) == java.io.File.pathSeparatorChar)
    start++;

  while(start < path.length())
    {
      int end = path.indexOf(java.io.File.pathSeparatorChar, start);
      if (end == -1)
	end = path.length();

      String pathComponent = path.substring(start, end);
      if (pathComponent.length() > 0)
	try{
	  java.io.File f = nice.tools.util.System.getFile(pathComponent);
	  if (f.canRead())
	    components.add(url(f.getCanonicalFile()));
	  else
	    {
	      if (!f.exists())
		warning("Path component "pathComponent" does not exist");
	      else
		warning("Path component "pathComponent" is not readable");
	    }
        }
        catch(java.net.MalformedURLException e){
	  warning("Path component "pathComponent" is invalid");
	}
	catch(java.io.IOException e){
	  warning("Path component "pathComponent" is invalid");
	}
      start = end + 1;
    }

  return components.toArray();
}

URL url(java.io.File f)
{
  String path = f.getPath();
  if (path.endsWith(".jar"))
    return new URL("jar", "", "file:" path "!/");
  else
    return f.toURL();
}