/*
    * Copyright 2001-2009 The Apache Software Foundation.
    * 
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *      http://www.apache.org/licenses/LICENSE-2.0
    * 
    * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.juddi.jaxb;
  
  /**
   * @author <a href="mailto:jfaath@apache.org">Jeff Faath</a>
   * @author <a href="mailto:kstam@apache.org">Kurt T Stam</a>
   */
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.StringReader;
  import java.net.URL;
  
  import javax.xml.bind.JAXBContext;
  import javax.xml.bind.JAXBElement;
  import javax.xml.bind.JAXBException;
  import javax.xml.bind.Marshaller;
  import javax.xml.bind.Unmarshaller;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  
  /**
   * This class is the logical opposite of PrintUDDI. It will create
   * UDDI objects from a string or file.
   * @see PrintUDDI
   * @author unknown, but probably Kurt Stam
   */
  public class EntityCreator {
  
      public static final String UDDIv3_Package="org.uddi.api_v3";
      public static final String JUDDIv3_Package="org.apache.juddi.api_v3";
      
  	private static Log logger = LogFactory.getLog(EntityCreator.class);
  	
          /**
           * Builds UDDI data from a document, URL, file, etc
           * @param fileName
           * @param thePackage
           * @return UDDI entity from the file or null
           * @throws JAXBException
           * @throws IOException 
           */
  	@SuppressWarnings("rawtypes")
  	public static Object buildFromDoc(String fileName, String thePackage) throws JAXBException, IOException {
  		Object obj = null;
                  File f = new File(fileName);
                  URL url=null;
                  if (f.exists()){
                      url = f.toURI().toURL();
                  }
                  if (url==null) {
  		    url = Thread.currentThread().getContextClassLoader().getResource(fileName);
                  }
  		if (url==null) {
  			logger.error("Could not find resource: " + fileName);
  		} else {
  			InputStream resourceStream =url.openStream();
  	
  			JAXBContext jc = JAXBContext.newInstance(thePackage);
  			Unmarshaller unmarshaller = jc.createUnmarshaller();
  			obj = ((JAXBElement)unmarshaller.unmarshal(resourceStream)).getValue();
  		}
  		return obj;
  	}
  
          /**
           * converts a XML in a String to a UDDI entity
           * @param source
           * @param thePackage
           * @return UDDI entity from the file
           * @throws JAXBException
           * @throws IOException 
           */
  	@SuppressWarnings("rawtypes")
  	public static Object buildFromString(String source, String thePackage) throws JAXBException, IOException {
  		Object obj = null;
  		JAXBContext jc = JAXBContext.newInstance(thePackage);
  		Unmarshaller unmarshaller = jc.createUnmarshaller();
  		obj = ((JAXBElement)unmarshaller.unmarshal(new StringReader(source)));
  		return obj;
  	}
  		
          /**
           * Only use this class for debugging purposes. Output may not be valid XML
           * @param obj
          * @param thePackage
          * @throws JAXBException
          * @deprecated
          */
         @Deprecated
 	public static void outputEntity(Object obj, String thePackage) throws JAXBException {
 		JAXBContext jc = JAXBContext.newInstance(thePackage);
 		Marshaller marshaller = jc.createMarshaller();
 		marshaller.marshal( new JAXBElement<Object>(new javax.xml.namespace.QName("uri","local"), Object.class, obj), System.out);
 		
 	}
 	
 }