com.ibm.as400.access.DBSQLDADataFormat Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of jt400 Show documentation
The Open Source version of the IBM Toolbox for Java
The newest version!
///////////////////////////////////////////////////////////////////////////////
//
// JTOpen (IBM Toolbox for Java - OSS version)
//
// Filename: DBSQLDADataFormat.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 DBSQLDADataFormat class is an implementation of
DBDataFormat which describes the data format used in
the SQLDA, specifically for the package cache.
**/
class DBSQLDADataFormat
implements DBDataFormat
{
    private static final String copyright = "Copyright (C) 1997-2001 International Business Machines Corporation and others.";




    // Private data.
    private static final int    REPEATED_LENGTH_    = 80;

    private byte[]              rawBytes_           = null;
    private int                 offset_             = -1;

    private int                 numberOfFields_     = -1;

    private int                 jobCCSID_;    // @D1A
    private int                 length_             = -1;
    private boolean             csRsData_           = false;    // @550A Indicates if the data associated with this format is from a stored procedure result set.



    /**
    Constructs a DBSQLDADataFormat object.  Use this when overlaying
    on a reply datastream.  The cached data will be set when overlay()
    is called.
     * @param jobCCSID 
    **/
    public DBSQLDADataFormat(int jobCCSID)    // @D1C
    {
        jobCCSID_ = jobCCSID;    // @D1A
    }



    // @D1D /**
    // @D1D Constructs a DBSQLDADataFormat object.  Use this when overlaying
    // @D1D on a request datastream.  This sets the cached data so that
    // @D1D the total length can be calculated before calling overlay().
    // @D1D **/
    // @D1D     public DBSQLDADataFormat (int numberOfFields)
    // @D1D     {
    // @D1D         numberOfFields_ = numberOfFields;
    // @D1D     }



    /**
    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)
    {
        rawBytes_           = rawBytes;
        offset_             = offset;

        if(numberOfFields_ == -1)
            numberOfFields_ = BinaryConverter.byteArrayToShort (rawBytes_, offset_ + 14);

        length_             = 16 + numberOfFields_ * REPEATED_LENGTH_;
    }



    public int getLength ()
    {
        return length_;
    }



    public int getConsistencyToken ()
    {
        // Not applicable.
        return -1;
    }



    public int getNumberOfFields ()
    {
        return numberOfFields_;
    }



    public int getRecordSize()
    {
        int recordSize = 0;
        int numberOfFields = getNumberOfFields ();
        for(int i = 0; i