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The Open Source version of the IBM Toolbox for Java
///////////////////////////////////////////////////////////////////////////////
//
// JTOpen (IBM Toolbox for Java - OSS version)
//
// Filename: DBLobData.java
//
// The source code contained herein is licensed under the IBM Public License
// Version 1.0, which has been approved by the Open Source Initiative.
// Copyright (C) 1997-2001 International Business Machines Corporation and
// others. All rights reserved.
//
///////////////////////////////////////////////////////////////////////////////
package com.ibm.as400.access;
/**
The DBLobData class represents the data retrieved using a LOB locator.
**/
class DBLobData
implements DBOverlay
{
private static final String copyright = "Copyright (C) 1997-2001 International Business Machines Corporation and others.";
// Private data.
private byte[] rawBytes_ = null;
private int offset_ = -1;
private int actualLength_ = -1;
private boolean dataCompressed_ = false;
private int physicalLength_ = -1; // @A1C
// Note: The "actual length" is the length of the lob data. The // @A1A
// "physical length" is the number of bytes as they appear // @A1A
// in the datastream. // @A1A
/**
Constructs a DBLobData object. Use this when overlaying
on a reply datastream.
* @param actualLength
* @param physicalLength
* @param dataCompressed
**/
public DBLobData (int actualLength,
int physicalLength, // @A1A
boolean dataCompressed)
{
actualLength_ = actualLength;
physicalLength_ = physicalLength; // @A1A
dataCompressed_ = dataCompressed;
}
public int getOffset()
{
return offset_;
}
/**
Positions the overlay structure. This reads the cached data only
when it was not previously set by the constructor.
**/
public void overlay (byte[] rawBytes, int offset)
{
offset_ = offset;
// If the data is compressed, then we need to uncompress it and store
// it in a new byte array.
if (dataCompressed_) {
byte[] decompressedBytes = new byte[actualLength_]; // @A1C
JDUtilities.decompress(rawBytes, offset_, physicalLength_, decompressedBytes, 0);
offset_ = 0; // @A2A
rawBytes_ = decompressedBytes;
}
else {
rawBytes_ = rawBytes;
}
}
public int getLength ()
{
return actualLength_;
}
public byte[] getRawBytes ()
{
return rawBytes_;
}
void adjustForGraphic() // @A3A
{
actualLength_ = actualLength_ * 2;
}
}