javaunohelper/com/sun/star/lib/uno/adapter/XOutputStreamToByteArrayAdapter.java

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  27
  28 /*
  29  * ByteArrayXOutputStream.java
  30  *
  31  * Created on 11. April 2003, 14:20
  32  */
  33
  34 package com.sun.star.lib.uno.adapter;
  35
  36 /**
  37  *
  38  * @author  lo119109
  39  */
  40
  41 import com.sun.star.io.*;
  42 import  com.sun.star.lib.uno.helper.ComponentBase;
  43
  44 public class XOutputStreamToByteArrayAdapter
  45     extends ComponentBase
  46     implements XOutputStream
  47 {
  48     private int initialSize = 100240; // 10 kb
  49     private int size = 0;
  50     private int position = 0;
  51     private boolean externalBuffer = false;
  52     private boolean closed = false;
  53     private byte[] buffer;
  54
  55     /** Creates a new instance of ByteArrayXOutputStream */
  56     public XOutputStreamToByteArrayAdapter() {
  57         this(null);
  58     }
  59
  60     public XOutputStreamToByteArrayAdapter(byte[] aBuffer) {
  61         if (aBuffer != null) {
  62             externalBuffer = true;
  63             buffer = aBuffer;
  64             size = buffer.length;
  65             // System.err.println("new outputbuffer with external storage");
  66         } else {
  67             size = initialSize;
  68             buffer = new byte[size];
  69             // System.err.println("new outputbuffer with internal storage");
  70         }
  71     }
  72
  73     public byte[] getBuffer() {
  74         return buffer;
  75     }
  76
  77     public void closeOutput()
  78         throws com.sun.star.io.NotConnectedException,
  79             com.sun.star.io.BufferSizeExceededException,
  80             com.sun.star.io.IOException
  81     {
  82         // trim buffer
  83         if ( buffer.length > position && !externalBuffer )
  84         {
  85             byte[] newBuffer = new byte[position];
  86             System.arraycopy(buffer, 0, newBuffer, 0, position);
  87             buffer = newBuffer;
  88         }
  89         closed = true;
  90     }
  91
  92     public void flush()
  93         throws com.sun.star.io.NotConnectedException,
  94             com.sun.star.io.BufferSizeExceededException,
  95             com.sun.star.io.IOException
  96     {
  97     }
  98
  99     public void writeBytes(byte[] values)
 100         throws com.sun.star.io.NotConnectedException,
 101             com.sun.star.io.BufferSizeExceededException,
 102             com.sun.star.io.IOException
 103     {
 104         // System.err.println("writeBytes("+values.length+")");
 105         if ( values.length > size-position )
 106         {
 107             if ( externalBuffer )
 108                 throw new BufferSizeExceededException("out of buffer space, cannot grow external buffer");
 109             byte[] newBuffer = null;
 110             while ( values.length > size-position )
 111                 size *= 2;
 112             // System.err.println("new buffer size is "+size+" bytes.");
 113             newBuffer = new byte[size];
 114             System.arraycopy(buffer, 0, newBuffer, 0, position);
 115             buffer = newBuffer;
 116         }
 117         System.arraycopy(values, 0, buffer, position, values.length);
 118         position += values.length;
 119     }
 120
 121 }