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The Open Source version of the IBM Toolbox for Java
///////////////////////////////////////////////////////////////////////////////
//
// JTOpen (IBM Toolbox for Java - OSS version)
//
// Filename: SQLBlob.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) 1997-2006 International Business Machines Corporation and
// others. All rights reserved.
//
///////////////////////////////////////////////////////////////////////////////
package com.ibm.as400.access;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.Reader;
import java.math.BigDecimal;
import java.sql.Blob;
import java.sql.Clob;
import java.sql.Date;
/* ifdef JDBC40
import java.sql.NClob;
import java.sql.RowId;
endif */
import java.sql.SQLException;
/* ifdef JDBC40
import java.sql.SQLXML;
endif */
import java.sql.Time;
import java.sql.Timestamp;
import java.util.Calendar;
final class SQLBlob extends SQLDataBase
{
static final String copyright = "Copyright (C) 1997-2010 International Business Machines Corporation and others.";
private static final byte[] default_ = new byte[0];
private int maxLength_;
private byte[] value_ = default_;
private Object savedObject_; // This is our byte[] or InputStream or whatever that we save to convert to bytes until we really need to.
private int scale_ = -1; // This is our length.
SQLBlob(int maxLength, SQLConversionSettings settings)
{
super(settings);
maxLength_ = maxLength;
}
public Object clone()
{
return new SQLBlob(maxLength_, null);
}
public void convertFromRawBytes(byte[] rawBytes, int offset, ConvTable ccsidConverter, boolean ignoreConversionErrors)
throws SQLException
{
int length = BinaryConverter.byteArrayToInt(rawBytes, offset);
value_ = new byte[length];
System.arraycopy(rawBytes, offset+4, value_, 0, value_.length);
savedObject_ = null;
}
public void convertToRawBytes(byte[] rawBytes, int offset, ConvTable ccsidConverter)
throws SQLException
{
if(savedObject_ != null) doConversion();
BinaryConverter.intToByteArray(value_.length, rawBytes, offset);
System.arraycopy(value_, 0, rawBytes, offset+4, value_.length);
}
public void set(Object object, Calendar calendar, int scale) throws SQLException
{
// If it's a byte[] we check for data truncation.
if(object instanceof byte[])
{
byte[] bytes = (byte[])object;
truncated_ = (bytes.length > maxLength_ ? bytes.length-maxLength_ : 0);
outOfBounds_ = false;
}
else if(object instanceof String)
{
byte[] bytes = null;
try
{
bytes = BinaryConverter.stringToBytes((String)object);
}
catch(NumberFormatException nfe)
{
// the String contains non-hex characters
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH, nfe);
// Dummy throw to prevent warning about npe on bytes
throw new SQLException();
}
object = bytes;
outOfBounds_ = false;
truncated_ = (bytes.length > maxLength_ ? bytes.length-maxLength_ : 0);
}
else if (object instanceof Clob) {
byte[] bytes = null;
try {
bytes = BinaryConverter.stringToBytes(((Clob)object).getSubString(1, (int)((Clob)object).length()));
} catch(NumberFormatException nfe) {
// the String contains non-hex characters
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH, nfe);
// Dummy throw to prevent warning about npe on bytes
throw new SQLException();
}
object = bytes;
outOfBounds_ = false;
truncated_ = (bytes.length > maxLength_ ? bytes.length-maxLength_ : 0);
}
else if(object instanceof Reader)
{
int length = scale; // hack to get the length into the set method
byte[] bytes = null;
if(length >= 0)
{
try
{
int blockSize = length < AS400JDBCPreparedStatement.LOB_BLOCK_SIZE ? length : AS400JDBCPreparedStatement.LOB_BLOCK_SIZE;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
HexReaderInputStream stream = new HexReaderInputStream((Reader)object);
byte[] byteBuffer = new byte[blockSize];
int totalBytesRead = 0;
int bytesRead = stream.read(byteBuffer, 0, blockSize);
while(bytesRead > -1 && totalBytesRead < length)
{
baos.write(byteBuffer, 0, bytesRead);
totalBytesRead += bytesRead;
int bytesRemaining = length - totalBytesRead;
if(bytesRemaining < blockSize)
{
blockSize = bytesRemaining;
}
bytesRead = stream.read(byteBuffer, 0, blockSize);
}
bytes = baos.toByteArray();
if(bytes.length < length)
{
// a length longer than the stream was specified
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
}
int objectLength = bytes.length;
if(bytes.length > maxLength_)
{
byte[] newValue = new byte[maxLength_];
System.arraycopy(bytes, 0, newValue, 0, maxLength_);
bytes = newValue;
}
stream.close(); //@scan1
object = bytes;
truncated_ = objectLength - bytes.length;
}
catch(ExtendedIOException eie)
{
// the Reader contains non-hex characters
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH, eie);
}
catch(IOException ie)
{
JDError.throwSQLException(JDError.EXC_INTERNAL, ie);
}
}
else if(length == -2 || length == -1 ) //@readerlen new else-if block (read all data)
{
try
{
int blockSize = AS400JDBCPreparedStatement.LOB_BLOCK_SIZE;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
HexReaderInputStream stream = new HexReaderInputStream((Reader)object);
byte[] byteBuffer = new byte[blockSize];
int totalBytesRead = 0;
int bytesRead = stream.read(byteBuffer, 0, blockSize);
while(bytesRead > -1 )
{
baos.write(byteBuffer, 0, bytesRead);
totalBytesRead += bytesRead;
bytesRead = stream.read(byteBuffer, 0, blockSize);
}
bytes = baos.toByteArray();
int objectLength = bytes.length;
if(bytes.length > maxLength_)
{
byte[] newValue = new byte[maxLength_];
System.arraycopy(bytes, 0, newValue, 0, maxLength_);
bytes = newValue;
}
stream.close(); //@scan1
object = bytes;
truncated_ = objectLength - bytes.length;
}
catch(ExtendedIOException eie)
{
// the Reader contains non-hex characters
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH, eie);
}
catch(IOException ie)
{
JDError.throwSQLException(JDError.EXC_INTERNAL, ie);
}
}
else
{
JDError.throwSQLException(JDError.EXC_DATA_TYPE_MISMATCH);
}
}
else if(( !(object instanceof Blob)) &&
!(object instanceof InputStream))
{
if (JDTrace.isTraceOn()) {
if (object == null) {
JDTrace.logInformation(this, "Unable to assign null object");
} else {
JDTrace.logInformation(this, "Unable to assign object("+object+") of class("+object.getClass().toString()+")");
}
}
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
}
savedObject_ = object;
if(scale != -1) scale_ = scale;
// If we truncated, do the conversion so that the truncated value is set
if (truncated_ > 0) {
doConversion();
}
}
private void doConversion()
throws SQLException
{
try
{
Object object = savedObject_;
if(object instanceof byte[])
{
value_ = (byte[]) object;
int objectLength = value_.length;
if(value_.length > maxLength_)
{
byte[] newValue = new byte[maxLength_];
System.arraycopy(value_, 0, newValue, 0, maxLength_);
value_ = newValue;
}
truncated_ = objectLength - value_.length;
}
else if(object instanceof Blob)
{
Blob blob = (Blob) object;
int blobLength = (int)blob.length();
int lengthToUse = blobLength < 0 ? 0x7FFFFFFF : blobLength;
if(lengthToUse > maxLength_) lengthToUse = maxLength_;
value_ = blob.getBytes(1, lengthToUse);
truncated_ = blobLength - lengthToUse;
}
else if(object instanceof InputStream)
{
int length = scale_; // hack to get the length into the set method
if(length >= 0)
{
InputStream stream = (InputStream)object;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int blockSize = length < AS400JDBCPreparedStatement.LOB_BLOCK_SIZE ? length : AS400JDBCPreparedStatement.LOB_BLOCK_SIZE;
byte[] byteBuffer = new byte[blockSize];
try
{
int totalBytesRead = 0;
int bytesRead = stream.read(byteBuffer, 0, blockSize);
while(bytesRead > -1 && totalBytesRead < length)
{
baos.write(byteBuffer, 0, bytesRead);
totalBytesRead += bytesRead;
int bytesRemaining = length - totalBytesRead;
if(bytesRemaining < blockSize)
{
blockSize = bytesRemaining;
}
bytesRead = stream.read(byteBuffer, 0, blockSize);
}
}
catch(IOException ie)
{
JDError.throwSQLException(JDError.EXC_INTERNAL, ie);
}
value_ = baos.toByteArray();
if(value_.length < length)
{
// a length longer than the stream was specified
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
}
int objectLength = value_.length;
if(value_.length > maxLength_)
{
byte[] newValue = new byte[maxLength_];
System.arraycopy(value_, 0, newValue, 0, maxLength_);
value_ = newValue;
}
truncated_ = objectLength - value_.length;
}
else if(length == -2) //@readerlen new else-if block (read all data)
{
InputStream stream = (InputStream)object;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int blockSize = AS400JDBCPreparedStatement.LOB_BLOCK_SIZE;
byte[] byteBuffer = new byte[blockSize];
try
{
int totalBytesRead = 0;
int bytesRead = stream.read(byteBuffer, 0, blockSize);
while(bytesRead > -1)
{
baos.write(byteBuffer, 0, bytesRead);
totalBytesRead += bytesRead;
bytesRead = stream.read(byteBuffer, 0, blockSize);
}
}
catch(IOException ie)
{
JDError.throwSQLException(JDError.EXC_INTERNAL, ie);
}
value_ = baos.toByteArray();
int objectLength = value_.length;
if(value_.length > maxLength_)
{
byte[] newValue = new byte[maxLength_];
System.arraycopy(value_, 0, newValue, 0, maxLength_);
value_ = newValue;
}
truncated_ = objectLength - value_.length;
}
else
{
JDError.throwSQLException(JDError.EXC_DATA_TYPE_MISMATCH);
}
}
else
{
JDError.throwSQLException(JDError.EXC_DATA_TYPE_MISMATCH);
}
}
finally
{
savedObject_ = null;
}
}
//---------------------------------------------------------//
// //
// DESCRIPTION OF SQL TYPE //
// //
//---------------------------------------------------------//
public int getSQLType()
{
return SQLData.BLOB;
}
public String getCreateParameters()
{
return AS400JDBCDriver.getResource("MAXLENGTH",null);
}
public int getDisplaySize()
{
return maxLength_;
}
public String getJavaClassName()
{
return "com.ibm.as400.access.AS400JDBCBlob";
}
public String getLiteralPrefix()
{
return null;
}
public String getLiteralSuffix()
{
return null;
}
public String getLocalName()
{
return "BLOB";
}
public int getMaximumPrecision()
{
return AS400JDBCDatabaseMetaData.MAX_LOB_LENGTH; //@xml3 // the DB2 SQL reference says this should be 2147483647 but we return 1 less to allow for NOT NULL columns
}
public int getMaximumScale()
{
return 0;
}
public int getMinimumScale()
{
return 0;
}
public int getNativeType()
{
return 404;
}
public int getPrecision()
{
return maxLength_;
}
public int getRadix()
{
return 0;
}
public int getScale()
{
return 0;
}
public int getType()
{
return java.sql.Types.BLOB;
}
public String getTypeName()
{
return "BLOB";
}
public boolean isSigned()
{
return false;
}
public boolean isText()
{
return true; //@CRS - Why is this true?
}
public int getActualSize()
{
return value_.length;
}
public int getTruncated()
{
return truncated_;
}
public boolean getOutOfBounds() {
return outOfBounds_;
}
//---------------------------------------------------------//
// //
// CONVERSIONS TO JAVA TYPES //
// //
//---------------------------------------------------------//
public BigDecimal getBigDecimal(int scale) //@CRS - Could use a Converter here to make this work.
throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return null;
}
public InputStream getBinaryStream()
throws SQLException
{
if(savedObject_ != null) doConversion();
truncated_ = 0; outOfBounds_ = false;
return new ByteArrayInputStream(value_);
}
public Blob getBlob()
throws SQLException
{
if(savedObject_ != null) doConversion();
truncated_ = 0; outOfBounds_ = false;
return new AS400JDBCBlob(value_, maxLength_);
}
public boolean getBoolean()
throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return false;
}
public byte getByte()
throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return -1;
}
public byte[] getBytes()
throws SQLException
{
if(savedObject_ != null) doConversion();
truncated_ = 0; outOfBounds_ = false;
return value_;
}
public Date getDate(Calendar calendar) //@CRS - Could use toLong() to make this work.
throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return null;
}
public double getDouble() //@CRS - Could use a Converter here to make this work.
throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return -1;
}
public float getFloat() //@CRS - Could use a Converter here to make this work.
throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return -1;
}
public int getInt() //@CRS - Could use a Converter here to make this work.
throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return -1;
}
public long getLong() //@CRS - Could use a Converter here to make this work.
throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return -1;
}
public Object getObject()
throws SQLException
{
if(savedObject_ != null) doConversion();
truncated_ = 0; outOfBounds_ = false;
return new AS400JDBCBlob(value_, maxLength_);
}
public short getShort() //@CRS - Could use a Converter here to make this work.
throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return -1;
}
public String getString()
throws SQLException
{
if(savedObject_ != null) doConversion();
truncated_ = 0; outOfBounds_ = false;
return BinaryConverter.bytesToHexString(value_);
}
public Time getTime(Calendar calendar) //@CRS - Could use toLong() to make this work.
throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return null;
}
public Timestamp getTimestamp(Calendar calendar) //@CRS - Could use toLong() to make this work.
throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return null;
}
/* ifdef JDBC40
//@PDA jdbc40
public RowId getRowId() throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return null;
}
//@PDA jdbc40
public SQLXML getSQLXML() throws SQLException
{
if(savedObject_ != null) doConversion();
truncated_ = 0; outOfBounds_ = false;
//String string = BinaryConverter.bytesToHexString(value_); //@xml2
return new AS400JDBCSQLXML(value_, maxLength_); //@xml2
//return new AS400JDBCSQLXML(string, string.length()); //@xml2
}
endif */
// @array
public void saveValue() throws SQLException {
if(savedObject_ != null) doConversion();
savedValue_ = value_;
}
}