xmldocumenteditorfactory.java

sun公司的petstore,一个J2ee的示例应用程序.

/*
 * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *
 * - Redistributions of source code must retain the above copyright
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 * - Redistribution in binary form must reproduce the above copyright
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 *   distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES
 * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN
 * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR
 * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR
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 * LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE,
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 * You acknowledge that Software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of
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 */

package com.sun.j2ee.blueprints.xmldocuments;

import java.io.*;
import java.net.*;
import java.util.*;


public class XMLDocumentEditorFactory {
  private Properties xdeCatalog = new Properties();


  public XMLDocumentEditorFactory() {}

  public XMLDocumentEditorFactory(URL catalogURL) throws XMLDocumentException {
    try {
      xdeCatalog.load(catalogURL.openStream());
    } catch (IOException exception) {
      throw new XMLDocumentException("Can't load from resource: " + catalogURL, exception);
    }
    return;
  }

  public XMLDocumentEditor getXDE(String schemaURI) throws XMLDocumentException {
    String className = xdeCatalog.getProperty(schemaURI);
    if (className != null) {
      return createXDE(className);
    }
    throw new XMLDocumentException("No mapping for schema: " + schemaURI);
  }

  public XMLDocumentEditor createXDE(String className) throws XMLDocumentException {
    try {
      return (XMLDocumentEditor) Class.forName(className).newInstance();
    } catch(Exception exception) {
      throw new XMLDocumentException("Can't instantiate XDE: " + className, exception);
    }
  }
}