1 /*
   2  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.xml.internal.messaging.saaj.soap;
  27 
  28 import java.awt.datatransfer.DataFlavor;
  29 import java.io.IOException;
  30 import java.io.OutputStream;
  31 
  32 import javax.activation.*;
  33 import javax.xml.transform.Source;
  34 import javax.xml.transform.Transformer;
  35 import javax.xml.transform.stream.StreamResult;
  36 import javax.xml.transform.stream.StreamSource;
  37 
  38 import com.sun.xml.internal.messaging.saaj.util.transform.EfficientStreamingTransformer;
  39 
  40 /**
  41  * JAF data handler for XML content
  42  *
  43  * @author Anil Vijendran
  44  */
  45 public class XmlDataContentHandler implements DataContentHandler {
  46     public static final String STR_SRC = "javax.xml.transform.stream.StreamSource";
  47     private static Class<?> streamSourceClass = null;
  48 
  49     public XmlDataContentHandler() throws ClassNotFoundException {
  50         if (streamSourceClass == null) {
  51             streamSourceClass = Class.forName(STR_SRC);
  52         }
  53     }
  54 
  55     /**
  56      * return the DataFlavors for this <code>DataContentHandler</code>
  57      * @return The DataFlavors.
  58      */
  59     public DataFlavor[] getTransferDataFlavors() { // throws Exception;
  60         DataFlavor flavors[] = new DataFlavor[2];
  61 
  62         flavors[0] =
  63             new ActivationDataFlavor(streamSourceClass, "text/xml", "XML");
  64         flavors[1] =
  65             new ActivationDataFlavor(streamSourceClass, "application/xml", "XML");
  66 
  67         return flavors;
  68     }
  69 
  70     /**
  71      * return the Transfer Data of type DataFlavor from InputStream
  72      * @param df The DataFlavor.
  73      * @param ins The InputStream corresponding to the data.
  74      * @return The constructed Object.
  75      */
  76     public Object getTransferData(DataFlavor flavor, DataSource dataSource)
  77         throws IOException {
  78         if (flavor.getMimeType().startsWith("text/xml") ||
  79                 flavor.getMimeType().startsWith("application/xml")) {
  80             if (flavor.getRepresentationClass().getName().equals(STR_SRC)) {
  81                 return new StreamSource(dataSource.getInputStream());
  82             }
  83         }
  84         return null;
  85     }
  86 
  87     /**
  88      *
  89      */
  90     public Object getContent(DataSource dataSource) throws IOException {
  91         return new StreamSource(dataSource.getInputStream());
  92     }
  93 
  94     /**
  95      * construct an object from a byte stream
  96      * (similar semantically to previous method, we are deciding
  97      *  which one to support)
  98      */
  99     public void writeTo(Object obj, String mimeType, OutputStream os)
 100         throws IOException {
 101         if (!mimeType.startsWith("text/xml") && !mimeType.startsWith("application/xml"))
 102             throw new IOException(
 103                 "Invalid content type \"" + mimeType + "\" for XmlDCH");
 104 
 105 
 106         try {
 107             Transformer transformer = EfficientStreamingTransformer.newTransformer();
 108             StreamResult result = new StreamResult(os);
 109             if (obj instanceof DataSource) {
 110                 // Streaming transform applies only to javax.xml.transform.StreamSource
 111                 transformer.transform((Source) getContent((DataSource)obj), result);
 112             } else {
 113                 Source src=null;
 114                 if (obj instanceof String) {
 115                      src= new StreamSource(new java.io.StringReader((String) obj));
 116                 } else {
 117                     src=(Source) obj;
 118                 }
 119                 transformer.transform(src, result);
 120             }
 121         } catch (Exception ex) {
 122             throw new IOException(
 123                 "Unable to run the JAXP transformer on a stream "
 124                     + ex.getMessage());
 125         }
 126     }
 127 }
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