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The Open Source version of the IBM Toolbox for Java
///////////////////////////////////////////////////////////////////////////////
//
// JTOpen (IBM Toolbox for Java - OSS version)
//
// Filename: DDMS38OpenFeedback.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) 1997-2000 International Business Machines Corporation and
// others. All rights reserved.
//
///////////////////////////////////////////////////////////////////////////////
package com.ibm.as400.access;
import java.io.IOException;
/**
*Class representing the open feedback structure. The structure
*is described by CINC WWODPOFB.
**/
class DDMS38OpenFeedback
{
// offsets and byte lengths of the various portions of the feedback structure
// that we are interested in
private static final int FILE_OPEN_TYPE = 10;
private static final int FILE_NAME = 11;
private static final int FILE_NAME_LENGTH = 10;
private static final int LIB_NAME = 21;
private static final int LIB_NAME_LENGTH = 10;
private static final int MBR_NAME = 31;
private static final int MBR_NAME_LENGTH = 10;
private static final int RECORD_LEN = 41;
private static final int INP_BUFFER_LEN = 45;
private static final int OUT_BUFFER_LEN = 49;
private static final int NUM_RECORDS = 53;
private static final int ACCESS_TYPE = 57;
private static final int ACCESS_TYPE_LENGTH = 2;
private static final int SUPPORT_DUPLICATE_KEYS = 59;
private static final int SUPPORT_DUPLICATE_KEYS_LENGTH = 1;
private static final int SOURCE_FILE_INDICATOR = 60;
private static final int SOURCE_FILE_INDICATOR_LENGTH = 1;
private static final int UFCB_PARAMETERS = 61;
private static final int UFCB_PARAMETERS_LENGTH = 10;
private static final int MAX_BLOCKED_RECORDS_TRANSFERRED = 71;
private static final int RECORD_INCREMENT = 73;
private static final int OPEN_FLAGS_1= 75; // Contains info on if MBR(*ALL) was specified, if this
// is a logical join file, etc.
private static final int NUMBER_OF_ASSOCIATED_PHYS_FILE_MBRS = 76;
private static final int MAX_RECORD_LENGTH = 82;
private static final int RECORD_WAIT_TIME = 84;
private static final int OPEN_FLAGS_2 = 88; // Contains info indicating if file contains variable
// length fields, whether variable length processing will
// be done, ODP scope, etc.
private static final int NULL_FIELD_BYTE_MAP = 90;
private static final int NULL_KEY_FIELD_BYTE_MAP = 92;
private static final int CCSID = 98;
private static final int FIXED_FIELD_LEN = 100; // Total length of the fixed fields in a variable length
// record.
private static final int MIN_RECORD_LEN = 102;
// The openfeedback data
byte[] data_;
// The offset into the data.
int offset_;
// Converter for EBCDIC to ASCII conversions
ConverterImplRemote conv_; //@B5C
/**
*Construct a DDMS38OpenFeedback object from the specified data.
*@param system the system from which to get the CCSID for converions.
*@param data the data from which to obtain the open feedback information.
**/
DDMS38OpenFeedback(AS400ImplRemote system, byte[] data) //@B5C
throws AS400SecurityException,
InterruptedException,
IOException
{
this(system, data, 0);
}
/**
*Construct a DDMS38OpenFeedback object from the specified data.
*@param system the system from which to get the CCSID for converions.
*@param data the data from which to obtain the open feedback information.
**/
DDMS38OpenFeedback(AS400ImplRemote system, byte[] data, int offset) //@B5C
throws AS400SecurityException,
InterruptedException,
IOException
{
data_ = data;
offset_ = offset;
conv_ = ConverterImplRemote.getConverter(system.getCcsid(), system); //@B5C
}
/**
*Returns the access type of the file.
*@return the access type if the the file.
**/
String getAccessType()
throws AS400SecurityException,
InterruptedException,
IOException
{
return conv_.byteArrayToString(data_, offset_ + ACCESS_TYPE,
ACCESS_TYPE_LENGTH);
}
/**
*Returns the CCSID of the file.
*@return the CCSID of the file.
**/
int getCCSID()
{
return BinaryConverter.byteArrayToUnsignedShort(data_, offset_ + CCSID);
}
/**
*Indicates if duplicate keys are supported by the file.
*@return true if duplicate keys are supported; false otherwise.
**/
boolean duplicateKeysSupported()
{
if (data_[offset_ + SUPPORT_DUPLICATE_KEYS] == (byte)0xC4)
{
return true;
}
return false;
}
/**
*Returns the file name of the file.
*@return the file name of the file.
**/
String getFileName()
throws AS400SecurityException,
InterruptedException,
IOException
{
return conv_.byteArrayToString(data_, offset_ + FILE_NAME,
FILE_NAME_LENGTH);
}
/**
*Returns the input buffer length for the file.
*@return the input buffer length.
**/
int getInputBufferLength()
{
return BinaryConverter.byteArrayToInt(data_, offset_ + INP_BUFFER_LEN);
}
/**
*Returns the library name of the file.
*@return the library name of the file.
**/
String getLibraryName()
throws AS400SecurityException,
InterruptedException,
IOException
{
return conv_.byteArrayToString(data_, offset_ + LIB_NAME, LIB_NAME_LENGTH);
}
/**
*Returns the maximum number of records that can read or written at one time.
*@return the maximum number of records that can be transferred at one time.
**/
int getMaxNumberOfRecordsTransferred()
{
return BinaryConverter.byteArrayToUnsignedShort(data_, offset_ + MAX_BLOCKED_RECORDS_TRANSFERRED);
}
/**
*Returns the member name.
*@return the member name.
**/
String getMemberName()
throws AS400SecurityException,
InterruptedException,
IOException
{
return conv_.byteArrayToString(data_, offset_ + MBR_NAME, MBR_NAME_LENGTH);
}
/**
*Returns the offset to the null field byte map for a record.
*@return the offset to the null field byte map.
**/
int getNullFieldByteMapOffset()
{
return BinaryConverter.byteArrayToUnsignedShort(data_, offset_ + NULL_FIELD_BYTE_MAP);
}
/**
*Returns the number of records in the file at open time.
*@return the number of records in the file at open time.
**/
int getNumberOfRecords()
{
return BinaryConverter.byteArrayToInt(data_, offset_ + NUM_RECORDS);
}
/**
*Returns the type of open for which the file is opened.
*@return the type of open for which the file is opened.
**/
int getOpenType()
{
int type = data_[offset_ + FILE_OPEN_TYPE] & 0xFFFF;
if (type == 64 || type == 68 || type == 192 || type == 196)
{
return AS400FileConstants.READ_ONLY; //@B0C
}
else if (type == 32 || type == 36 || type == 160 || type == 164)
{
return AS400FileConstants.WRITE_ONLY; //@B0C
}
else
{
return AS400FileConstants.READ_WRITE; //@B0C
}
}
/**
*Returns the output buffer length for the file.
*@return the output buffer length.
**/
int getOutputBufferLength()
{
return BinaryConverter.byteArrayToInt(data_, offset_ + OUT_BUFFER_LEN);
}
/**
*Returns the record increment for the records in the file. This is the number
*of bytes that will be returned or that need to be sent for a single record.
*It includes bytes for the record data, a gap of zero or more bytes and bytes
*for the null field byte map.
*@return the record increment.
**/
int getRecordIncrement()
{
return BinaryConverter.byteArrayToUnsignedShort(data_, offset_ + RECORD_INCREMENT);
}
/**
*Returns the record length of the records in the file.
*@return the record length of the records in the file.
**/
int getRecordLength()
{
return BinaryConverter.byteArrayToUnsignedShort(data_, offset_ + RECORD_LEN);
}
/**
*Indicates if the file contains variable length fields.
*@return true if the file contains variable length fields; false otherwise.
**/
boolean hasVariableLengthFields()
{
if ((data_[offset_ + OPEN_FLAGS_2 + 1] & 0x80) == 0x80)
{
return true;
}
return false;
}
/**
*Indicates if the file is a logical file.
*@return true if the file is a logical file; false otherwise.
**/
boolean isLogicalFile()
{
if ((data_[offset_ + OPEN_FLAGS_1] & 0x80) == 0x80)
{
return true;
}
return false;
}
/**
*Indicates if the file is a logical join file.
*@return true if the file is a logical join file; false otherwise.
**/
boolean isLogicalJoinFile()
{
if ((data_[offset_ + OPEN_FLAGS_1] & 0x04) == 0x04)
{
return true;
}
return false;
}
/**
*Indicates if the file contains null capable fields.
*@return true if the file contains null capable fields; false otherwise.
**/
boolean isNullCapable()
{
if ((data_[offset_ + OPEN_FLAGS_2 + 1] & 0x40) == 0x40)
{
return true;
}
return false;
}
/**
*Indicates if the file is a source file.
*@return true if the file is a source file; false otherwise.
**/
boolean isSourceFile()
{
return (data_[offset_ + SOURCE_FILE_INDICATOR] == (byte)0xE8);
}
/**
*Returns the contents of the openfeedback area as a string. Used for
*logging diagnostic information regarding the open of a file.
*@return the contents of the openfeedback area as a string.
**/
public String toString()
{
StringBuffer str = new StringBuffer(0);
try
{
str.append("Open type: ");
str.append(getOpenType());
str.append("\n");
str.append("Library name: ");
str.append(getLibraryName());
str.append("\n");
str.append("File name: ");
str.append(getFileName());
str.append("\n");
str.append("Member name: ");
str.append(getMemberName());
str.append("\n");
str.append("Record length: ");
str.append(getRecordLength());
str.append("\n");
str.append("Input buffer length: ");
str.append(getInputBufferLength());
str.append("\n");
str.append("Output buffer length: ");
str.append(getOutputBufferLength());
str.append("\n");
str.append("Number of records: ");
str.append(getNumberOfRecords());
str.append("\n");
str.append("Access type: ");
str.append(getAccessType());
str.append("\n");
str.append("Duplicate keys supported: ");
str.append(duplicateKeysSupported());
str.append("\n");
str.append("Source file: ");
str.append(isSourceFile());
str.append("\n");
str.append("Max blocked records transferred: ");
str.append(getMaxNumberOfRecordsTransferred());
str.append("\n");
str.append("Record increment: ");
str.append(getRecordIncrement());
str.append("\n");
str.append("Has variable length fields: ");
str.append(hasVariableLengthFields());
str.append("\n");
str.append("Is null capable: ");
str.append(isNullCapable());
str.append("\n");
str.append("Offset to null byte field map: ");
str.append(getNullFieldByteMapOffset());
str.append("\n");
str.append("Logical file: ");
str.append(isLogicalFile());
str.append("\n");
str.append("Logical join file: ");
str.append(isLogicalJoinFile());
str.append("\n");
str.append("CCSID: ");
str.append(getCCSID());
str.append("\n");
}
catch(Exception e)
{ // This should never happen; the AS400 object is connected when
// it is provided to us on the constructor. Need to shut up the compiler.
Trace.log(Trace.ERROR, e);
throw new InternalErrorException(InternalErrorException.UNKNOWN, e);
}
return str.toString();
}
}