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

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   9  * $RCSfile: XOutputStreamToByteArrayAdapter.java,v $
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  30
  31 /*
  32  * ByteArrayXOutputStream.java
  33  *
  34  * Created on 11. April 2003, 14:20
  35  */
  36
  37 package com.sun.star.lib.uno.adapter;
  38
  39 /**
  40  *
  41  * @author  lo119109
  42  */
  43
  44 import com.sun.star.io.*;
  45 import  com.sun.star.lib.uno.helper.ComponentBase;
  46
  47 public class XOutputStreamToByteArrayAdapter
  48     extends ComponentBase
  49     implements XOutputStream
  50 {
  51     private int initialSize = 100240; // 10 kb
  52     private int size = 0;
  53     private int position = 0;
  54     private boolean externalBuffer = false;
  55     private boolean closed = false;
  56     private byte[] buffer;
  57
  58     /** Creates a new instance of ByteArrayXOutputStream */
  59     public XOutputStreamToByteArrayAdapter() {
  60         this(null);
  61     }
  62
  63     public XOutputStreamToByteArrayAdapter(byte[] aBuffer) {
  64         if (aBuffer != null) {
  65             externalBuffer = true;
  66             buffer = aBuffer;
  67             size = buffer.length;
  68             // System.err.println("new outputbuffer with external storage");
  69         } else {
  70             size = initialSize;
  71             buffer = new byte[size];
  72             // System.err.println("new outputbuffer with internal storage");
  73         }
  74     }
  75
  76     public byte[] getBuffer() {
  77         return buffer;
  78     }
  79
  80     public void closeOutput()
  81         throws com.sun.star.io.NotConnectedException,
  82             com.sun.star.io.BufferSizeExceededException,
  83             com.sun.star.io.IOException
  84     {
  85         // trim buffer
  86         if ( buffer.length > position && !externalBuffer )
  87         {
  88             byte[] newBuffer = new byte[position];
  89             System.arraycopy(buffer, 0, newBuffer, 0, position);
  90             buffer = newBuffer;
  91         }
  92         closed = true;
  93     }
  94
  95     public void flush()
  96         throws com.sun.star.io.NotConnectedException,
  97             com.sun.star.io.BufferSizeExceededException,
  98             com.sun.star.io.IOException
  99     {
 100     }
 101
 102     public void writeBytes(byte[] values)
 103         throws com.sun.star.io.NotConnectedException,
 104             com.sun.star.io.BufferSizeExceededException,
 105             com.sun.star.io.IOException
 106     {
 107         // System.err.println("writeBytes("+values.length+")");
 108         if ( values.length > size-position )
 109         {
 110             if ( externalBuffer )
 111                 throw new BufferSizeExceededException("out of buffer space, cannot grow external buffer");
 112             byte[] newBuffer = null;
 113             while ( values.length > size-position )
 114                 size *= 2;
 115             // System.err.println("new buffer size is "+size+" bytes.");
 116             newBuffer = new byte[size];
 117             System.arraycopy(buffer, 0, newBuffer, 0, position);
 118             buffer = newBuffer;
 119         }
 120         System.arraycopy(values, 0, buffer, position, values.length);
 121         position += values.length;
 122     }
 123
 124 }