JarFileLocator.java

package com.spun.util.parser;

import java.util.HashMap;

public class JarFileLocator implements ResourceLocator
{
  private HashMap paths = new HashMap();
  private String  basePath;
  /***********************************************************************/
  public JarFileLocator(String basePath)
  {
    this.basePath = basePath;
  }
  /***********************************************************************/
  public String getLocation(String fileName)
  {
    String absolutePath = (String) paths.get(fileName);
    String temp = basePath + '/' + fileName;
    if (absolutePath == null)
    {
      ClassLoader cl = JarFileLocator.class.getClassLoader();
      if (cl.getResource(temp) != null)
      {
        absolutePath = temp;
        paths.put(fileName, absolutePath);
      }
    }
    if (absolutePath == null) { throw new NullPointerException(" The resource '" + fileName + "' could not be found at " + temp); }
    return absolutePath;
  }
  /***********************************************************************/
  /***********************************************************************/
}