IOUtil


1   /***************************************************************************
2    * Copyright 2001-2003 The eXo Platform SARL         All rights reserved.  *
3    * Please look at license.txt in info directory for more license detail.   *
4    **************************************************************************/
5   package org.exoplatform.commons.utils;
6   
7   import java.io.* ;
8   import java.net.URL  ;
9   
10  /**
11   * @author: Tuan Nguyen
12   * @version: $Id: IOUtil.java,v 1.4 2004/09/14 02:41:19 tuan08 Exp $
13   * @since: 0.0
14   * @email: tuan08@yahoo.com
15   */
16  public class IOUtil {
17    static public String   getFileContenntAsString(File file, String   encoding) throws Exception   {
18      FileInputStream is = new FileInputStream(file) ;
19      return new String  (getStreamContentAsBytes(is), encoding) ;
20    }
21    
22    static public String   getFileContenntAsString(File file) throws Exception   {
23      FileInputStream is = new FileInputStream(file) ;
24      return new String  (getStreamContentAsBytes(is)) ;
25    }
26    
27    static public String   getFileContenntAsString(String   fileName, String   encoding) throws Exception   {
28      FileInputStream is = new FileInputStream(fileName) ;
29      return new String  (getStreamContentAsBytes(is), encoding) ;
30    }
31    
32      static public String   getFileContenntAsString(String   fileName) throws Exception   {
33          FileInputStream is = new FileInputStream(fileName) ;
34          return new String  (getStreamContentAsBytes(is)) ;
35      }
36      
37      static public byte[] getFileContentAsBytes(String   fileName) throws Exception   {
38          FileInputStream is = new FileInputStream(fileName) ;
39          return getStreamContentAsBytes(is) ;
40      }
41      
42      static public String   getStreamContentAsString(InputStream is) throws Exception   {
43      char buf[] = new char[is.available()];
44      BufferedReader in = new BufferedReader(new InputStreamReader(is, "UTF-8"));    
45      in.read(buf);       
46        return new String  (buf) ;
47      }
48      
49      static public byte[] getStreamContentAsBytes(InputStream is) throws Exception   {
50          byte buf[] = new byte[is.available()];
51        for(int start = 0; start < buf.length; start += is.read(buf, start, buf.length - start));
52        return buf ;
53      }
54    
55    static public String   getResourceAsString(String   resource) throws Exception   {
56      ClassLoader   cl = Thread.currentThread().getContextClassLoader();
57      URL   url = cl.getResource(resource);
58      InputStream is = url.openStream();
59      return getStreamContentAsString(is) ;
60    }
61    
62    static public byte[] getResourceAsBytes(String   resource) throws Exception   {
63      ClassLoader   cl = Thread.currentThread().getContextClassLoader();
64      URL   url = cl.getResource(resource);
65      InputStream is = url.openStream();
66      return getStreamContentAsBytes(is) ;
67    }
68  
69      static public  byte[] serialize(Object   obj) throws Exception   {
70        //long start = System.currentTimeMillis() ;
71        ByteArrayOutputStream bytes = new  ByteArrayOutputStream() ;
72        ObjectOutputStream out = new ObjectOutputStream(bytes);
73        out.writeObject(obj);
74        out.close();
75        byte[] ret = bytes.toByteArray() ;
76        //long end = System.currentTimeMillis() ;
77        return ret ;
78      }
79  
80      static public Object   deserialize(byte[] bytes) throws Exception   {
81        if (bytes == null) return null ;
82        //long start = System.currentTimeMillis() ;
83        ByteArrayInputStream is = new  ByteArrayInputStream(bytes) ;
84        ObjectInputStream in = new ObjectInputStream(is);
85        Object   obj =  in.readObject() ;
86        in.close();
87        return obj ;
88      }
89  }
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