1 /*
   2  * Copyright (c) 2014, 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.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 package javax.xml.transform.util;
  25 
  26 import java.io.File;
  27 import java.io.FileInputStream;
  28 import java.io.FileOutputStream;
  29 import java.io.InputStream;
  30 
  31 import javax.xml.parsers.DocumentBuilder;
  32 import javax.xml.parsers.SAXParser;
  33 import javax.xml.parsers.SAXParserFactory;
  34 import javax.xml.transform.Result;
  35 import javax.xml.transform.Source;
  36 import javax.xml.transform.VersionDefaultHandler;
  37 import javax.xml.transform.stream.StreamResult;
  38 import javax.xml.transform.stream.StreamSource;
  39 
  40 import org.testng.Assert;
  41 import org.w3c.dom.Document;
  42 
  43 public class StreamUtil extends TransformerUtil {
  44 
  45     DocumentBuilder docBuilder = null;
  46 
  47     private static StreamUtil instance = null;
  48 
  49     /** Creates a new instance of StreamUtil */
  50     private StreamUtil() throws Exception {
  51         if (docBuilder == null)
  52             docBuilder = getDomParser();
  53     }
  54 
  55     public static synchronized StreamUtil getInstance() throws Exception {
  56         if (instance == null)
  57             instance = new StreamUtil();
  58         return instance;
  59     }
  60 
  61     public Source prepareSource(InputStream is) throws Exception {
  62         return new StreamSource(is);
  63     }
  64 
  65     public Result prepareResult() throws Exception {
  66         FileOutputStream fos = new FileOutputStream(TEMP_FILE);
  67         return new StreamResult(fos);
  68     }
  69 
  70     public void checkResult(Result result, String inputVersion) throws Exception {
  71         ((StreamResult) result).getOutputStream().close();
  72         FileInputStream fis = new FileInputStream(TEMP_FILE);
  73         checkStream(fis, inputVersion);
  74     }
  75 
  76     public void checkStream(FileInputStream fis, String inputVersion) throws Exception {
  77         docBuilder.reset();
  78         Document output = docBuilder.parse(fis);
  79         String version = output.getXmlVersion();
  80         Assert.assertTrue(inputVersion.equals(version), "Expected XML Version is 1.1, but actual version " + version);
  81     }
  82 
  83     public void checkResult(Result result, String version, String encoding) throws Exception {
  84         // use sax parser, as encoding info cannot be set on DOM document
  85         SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
  86         VersionDefaultHandler dh = new VersionDefaultHandler();
  87         parser.parse(new File(TEMP_FILE), dh);
  88         Assert.assertTrue(dh.getVersion().equals(version), "Expected version is " + version + " actual version " + dh.getVersion());
  89         Assert.assertTrue(dh.getEncoding().equals(encoding), "Expected version is " + encoding + " actual version " + dh.getEncoding());
  90     }
  91 }