org.argeo.enterprise/src/org/argeo/util/StreamUtils.java

   1 package org.argeo.util;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.io.OutputStream;
   6 import java.io.Reader;
   7 import java.io.Writer;
   8
   9 /** Utilities to be used when Apache Commons IO is not available. */
  10 class StreamUtils {
  11         private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;
  12
  13         /*
  14          * APACHE COMMONS IO (inspired)
  15          */
  16
  17         /** @return the number of bytes */
  18         public static Long copy(InputStream in, OutputStream out)
  19                         throws IOException {
  20                 Long count = 0l;
  21                 byte[] buf = new byte[DEFAULT_BUFFER_SIZE];
  22                 while (true) {
  23                         int length = in.read(buf);
  24                         if (length < 0)
  25                                 break;
  26                         out.write(buf, 0, length);
  27                         count = count + length;
  28                 }
  29                 return count;
  30         }
  31
  32         /** @return the number of chars */
  33         public static Long copy(Reader in, Writer out) throws IOException {
  34                 Long count = 0l;
  35                 char[] buf = new char[DEFAULT_BUFFER_SIZE];
  36                 while (true) {
  37                         int length = in.read(buf);
  38                         if (length < 0)
  39                                 break;
  40                         out.write(buf, 0, length);
  41                         count = count + length;
  42                 }
  43                 return count;
  44         }
  45
  46         public static void closeQuietly(InputStream in) {
  47                 if (in != null)
  48                         try {
  49                                 in.close();
  50                         } catch (Exception e) {
  51                                 //
  52                         }
  53         }
  54
  55         public static void closeQuietly(OutputStream out) {
  56                 if (out != null)
  57                         try {
  58                                 out.close();
  59                         } catch (Exception e) {
  60                                 //
  61                         }
  62         }
  63
  64         public static void closeQuietly(Reader in) {
  65                 if (in != null)
  66                         try {
  67                                 in.close();
  68                         } catch (Exception e) {
  69                                 //
  70                         }
  71         }
  72
  73         public static void closeQuietly(Writer out) {
  74                 if (out != null)
  75                         try {
  76                                 out.close();
  77                         } catch (Exception e) {
  78                                 //
  79                         }
  80         }
  81 }