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The Open Source version of the IBM Toolbox for Java
///////////////////////////////////////////////////////////////////////////////
//
// JTOpen (IBM Toolbox for Java - OSS version)
//
// Filename: SQLFloat.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;
import java.io.InputStream;
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 SQLFloat
extends SQLDataBase
{
static final String copyright = "Copyright (C) 1997-2003 International Business Machines Corporation and others.";
// Private data.
private double value_;
SQLFloat(SQLConversionSettings settings)
{
super(settings);
truncated_ = 0; outOfBounds_ = false;
value_ = 0.0d;
}
public Object clone()
{
return new SQLFloat(settings_);
}
//---------------------------------------------------------//
// //
// CONVERSION TO AND FROM RAW BYTES //
// //
//---------------------------------------------------------//
public void convertFromRawBytes(byte[] rawBytes, int offset, ConvTable ccsidConverter, boolean ignoreConversionErrors) //@P0C
throws SQLException
{
value_ = BinaryConverter.byteArrayToDouble(rawBytes, offset); // @D0C
}
public void convertToRawBytes(byte[] rawBytes, int offset, ConvTable ccsidConverter) //@P0C
throws SQLException
{
BinaryConverter.doubleToByteArray(value_, rawBytes, offset); // @D0C
}
//---------------------------------------------------------//
// //
// SET METHODS //
// //
//---------------------------------------------------------//
public void set(Object object, Calendar calendar, int scale)
throws SQLException
{
truncated_ = 0; outOfBounds_ = false;
if(object instanceof String)
{
try
{
if (settings_.getDecimalSeparator().equals(",")){
object = ((String) object).replace(',','.');
}
value_ = Double.valueOf((String) object).doubleValue();
if (value_ == Double.POSITIVE_INFINITY) {
// Check to see if overflow
if (!((String)object).toLowerCase().trim().equals("infinity")) {
truncated_ = 1; outOfBounds_ = true;
value_ = Double.MAX_VALUE;
}
} else if (value_ == Double.NEGATIVE_INFINITY) {
// Check to see if underflow
if (((String)object).toLowerCase().trim().indexOf("infinity")< 0) {
truncated_ = 1; outOfBounds_ = true;
value_ = -Double.MAX_VALUE;
}
}
// You can't test for data truncation of a number by testing
// the lengths of two string versions of it.
// Example string that should work but will fail:
// "4.749000000000E+00"
//@E2D int objectLength = ((String) object).length();
//@E2D int valueLength = Double.toString(value_).length();
//@E2D if(valueLength < objectLength)
//@E2D truncated_ = objectLength - valueLength;
}
catch(NumberFormatException e)
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
}
}
//else if(object instanceof BigDecimal) {
// value_ = ((BigDecimal) object).doubleValue();
// int objectLength = SQLDataFactory.getPrecision((BigDecimal) object);
// int valueLength = SQLDataFactory.getPrecision(new BigDecimal(value_));
// if(valueLength < objectLength)
// truncated_ = objectLength - valueLength;
//}
else if(object instanceof Number)
{
Number number = (Number) object;
value_ = number.doubleValue();
if (value_ == Double.POSITIVE_INFINITY) {
String stringValue = number.toString().toLowerCase();
if (stringValue.indexOf("inf") == 0) {
// Keep it
} else {
truncated_ = 1; outOfBounds_ = true;
value_ = Double.MAX_VALUE;
}
} else if (value_ == Double.NEGATIVE_INFINITY) {
String stringValue = number.toString().toLowerCase();
if (stringValue.indexOf("inf") > 0) {
// Keep it
} else {
truncated_ = 1; outOfBounds_ = true;
value_ = -Double.MAX_VALUE;
}
}
}
else if(object instanceof Boolean)
value_ = (((Boolean) object).booleanValue() == true) ? 1d : 0d;
else {
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);
}
}
//---------------------------------------------------------//
// //
// DESCRIPTION OF SQL TYPE //
// //
//---------------------------------------------------------//
public int getSQLType()
{
return SQLData.FLOAT;
}
public String getCreateParameters()
{
return null;
}
public int getDisplaySize()
{
return 22;
}
//@F1A JDBC 3.0
public String getJavaClassName()
{
return "java.lang.Float";
}
public String getLiteralPrefix()
{
return null;
}
public String getLiteralSuffix()
{
return null;
}
public String getLocalName()
{
return "FLOAT";
}
public int getMaximumPrecision()
{
return 53;
}
public int getMaximumScale()
{
return 0;
}
public int getMinimumScale()
{
return 0;
}
public int getNativeType()
{
return 480;
}
public int getPrecision()
{
return 53;
}
public int getRadix()
{
return 2; //@K1C changed from 10
}
public int getScale()
{
return 0;
}
public int getType()
{
return java.sql.Types.FLOAT;
}
public String getTypeName()
{
return "FLOAT";
}
public boolean isSigned()
{
return true;
}
public boolean isText()
{
return false;
}
public int getActualSize()
{
return SQLDataFactory.getPrecision(Double.toString(value_));
}
public int getTruncated()
{
return truncated_;
}
public boolean getOutOfBounds() {
return outOfBounds_;
}
//---------------------------------------------------------//
// //
// CONVERSIONS TO JAVA TYPES //
// //
//---------------------------------------------------------//
public BigDecimal getBigDecimal(int scale)
throws SQLException
{
// Convert the value to a String before creating the
// BigDecimal. This will create the exact BigDecimal
// that we want. If you pass the value directly to
// BigDecimal, then the value is not exact, and the
// scale becomes bigger than expected.
// @A0A
// Modified the code to deal with numbers in scientific
// notations. The numbers that are in scientific notation
// are parsed to a base (the part before 'E') and an
// exponent (the part after 'E'). The base is then used
// to construct the BigDecimal object and then the exponent
// is used to shift the decimal point to its rightful place.
// BigDecimal bigDecimal = new BigDecimal(Double.toString(value_)) // @A0D
truncated_ = 0; outOfBounds_ = false;
BigDecimal bigDecimal = null; // @A0A
String numString = Double.toString(value_); // @A0A
int eIndex = numString.indexOf("E"); // @A0A
if(eIndex == -1)
{ // @A0A
bigDecimal = new BigDecimal(numString); // @A0A
} // @A0A
else
{ // @A0A
String base = numString.substring(0, eIndex); // @A0A
int exponent = Integer.parseInt(numString.substring(eIndex+1)); // @A0A
bigDecimal = new BigDecimal(base); // @A0A
bigDecimal = bigDecimal.movePointRight(exponent); // @A0A
} // @A0A
if(scale >= 0)
{
if(scale >= bigDecimal.scale())
{
truncated_ = 0; outOfBounds_ = false;
return bigDecimal.setScale(scale);
}
else
{
truncated_ = bigDecimal.scale() - scale;
return bigDecimal.setScale(scale, BigDecimal.ROUND_HALF_UP);
}
}
else
return bigDecimal;
}
public InputStream getBinaryStream()
throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return null;
}
public Blob getBlob()
throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return null;
}
public boolean getBoolean()
throws SQLException
{
truncated_ = 0; outOfBounds_ = false;
return(value_ != 0.0d);
}
public byte getByte()
throws SQLException
{
truncated_ = 0; outOfBounds_ = false;
if(value_ > Byte.MAX_VALUE || value_ < Byte.MIN_VALUE)
{
if(value_ > Short.MAX_VALUE || value_ < Short.MIN_VALUE)
{
truncated_ = 3; outOfBounds_=true;
}
else
{
truncated_ = 1; outOfBounds_=true;
}
}
return(byte) value_;
}
public byte[] getBytes()
throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return null;
}
public Reader getCharacterStream()
throws SQLException
{
return new java.io.StringReader(getString());
}
public Clob getClob()
throws SQLException
{
String string = getString();
return new AS400JDBCClob(string, string.length());
}
public Date getDate(Calendar calendar)
throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return null;
}
public double getDouble()
throws SQLException
{
truncated_ = 0; outOfBounds_ = false;
return(double) value_;
}
public float getFloat()
throws SQLException
{
truncated_ = 0; outOfBounds_ = false;
return(float) value_;
}
public int getInt()
throws SQLException
{
truncated_ = 0; outOfBounds_ = false;
if(value_ > Integer.MAX_VALUE || value_ < Integer.MIN_VALUE)
{
truncated_ = 1; // this may not be accurate but we know truncation will occur
outOfBounds_=true;
}
return(int) value_;
}
public long getLong()
throws SQLException
{
truncated_ = 0; outOfBounds_ = false;
if(value_ > Long.MAX_VALUE || value_ < Long.MIN_VALUE)
{
truncated_ = 1; // this is not necessarily correct, but we know there is truncation
outOfBounds_=true;
}
return(long) value_;
}
public Object getObject()
throws SQLException
{
truncated_ = 0; outOfBounds_ = false;
return new Double(value_);
}
public short getShort()
throws SQLException
{
truncated_ = 0; outOfBounds_ = false;
if(value_ > Short.MAX_VALUE || value_ < Short.MIN_VALUE)
{
if(value_ > Integer.MAX_VALUE || value_ < Integer.MIN_VALUE)
{
truncated_ = 3;
outOfBounds_=true;
}
else
{
truncated_ = 2;
outOfBounds_=true;
}
}
return(short) value_;
}
public String getString()
throws SQLException
{
truncated_ = 0; outOfBounds_ = false;
String stringRep = Double.toString(value_);
int decimal = stringRep.indexOf('.');
if(decimal == -1)
return stringRep;
else
return stringRep.substring(0, decimal)
+ settings_.getDecimalSeparator()
+ stringRep.substring(decimal+1);
}
public Time getTime(Calendar calendar)
throws SQLException
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return null;
}
public Timestamp getTimestamp(Calendar calendar)
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
{
JDError.throwSQLException(this, JDError.EXC_DATA_TYPE_MISMATCH);
return null;
}
endif */
// @array
public void saveValue() {
savedValue_ = new Double(value_);
}
}