jet.connect
Class DbDouble

java.lang.Object
  jet.connect.DbValue
      jet.connect.DbNumber
          jet.connect.DbDouble

All Implemented Interfaces:

jet.util.DbValueable, jet.util.QuickSortableNode

public class DbDouble
extends DbNumber

The DbDouble class wraps a value of the primitive type double in an object. An object of the type DbDouble contains a single field whose type is double.

In addition, this class provides several methods for converting a DbDouble to a String or other number types, as well as other constants and methods used when dealing with a DbDouble.

Field Summary

double

value Deprecated.

Fields inherited from class jet.connect.DbValue

bNull, CHAR_DESC, CURRENCY_DESC, DATE_DESC, desc, DOUBLE_DESC, INTEGER_DESC, TIME_DESC

Fields inherited from interface jet.util.DbValueable

EQUAL, GREATER, LESS

Constructor Summary

DbDouble()
Constructs an uninitialized DbDouble.

DbDouble(DbColDesc desc)
Constructs an uninitialized DbDouble.

DbDouble(double val)
Constructs an uninitialized DbDouble.

Method Summary

byte	byteValue() Returns the value of this DbDouble as a byte.
java.lang.Object	clone() Creates a clone of this DbDouble object.
double	doubleValue() Returns the value of this DbDouble as a double.
boolean	equals(DbNumber v) Compares this object to the specified object.
float	floatValue() Returns the value of this DbDouble as a float.
double	get() Returns the value of this DbDouble as a double value.
int	intValue() Returns the value of this DbDouble as an int.
long	longValue() Returns the value of this DbDouble as a long value.
void	set(double v) Sets a newly allocated DbDouble object that represents the specified double argument.
void	set(JRHierarchicalDataset hds, int col) Sets a newly allocated DbDouble object that represents the double value indicated by the JRHierarchicalDataset parameter and an index of the column.
void	set(java.sql.ResultSet rs, int col) Sets a newly allocated DbDouble object that represents the double value indicated by the ResultSet parameter and an index of the column.
void	setValue(DbNumber v) Sets a newly allocated DbDouble object that represents the double value indicated by the DbNumber parameter.
void	setValue(java.lang.String v) Sets a newly allocated DbDouble object that represents the double value indicated by the String parameter.
short	shortValue() Returns the value of this DbDouble as a short.
java.lang.String	toString() Returns a String object representing this DbDouble's value.
java.lang.String	toStringValue()

Methods inherited from class jet.connect.DbNumber

compare, compareTo, equals, set

Methods inherited from class jet.connect.DbValue

compareTo, compareTo, equals, getColDesc, getPrecision, getScale, getSqlType, isCurrency, isNull, makeDbValue, setColDesc, setfoo, setNull, setValue

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

value

public double value

Deprecated.

The field contains the value of this object Note use get and set to access it instead of accessing it directly.

Constructor Detail

DbDouble

public DbDouble()

Constructs an uninitialized DbDouble. This DbDouble object is mutable until a nonzero value and the description of the column are set.

DbDouble

public DbDouble(double val)

Constructs an uninitialized DbDouble. This DbDouble object is mutable until DbColDesc is set.

Parameters:

val - the double value for constructing.

DbDouble

public DbDouble(DbColDesc desc)

Constructs an uninitialized DbDouble. This DbDouble object is mutable until the value is set.

Parameters:

desc - The value to be represented by the DbColDesc object.

Method Detail

get

public double get()

Returns the value of this DbDouble as a double value.

set

public void set(double v)

Sets a newly allocated DbDouble object that represents the specified double argument.

Parameters:

v - The double value to be represented by the DbDouble object.

set

public void set(java.sql.ResultSet rs,
                int col)
         throws java.sql.SQLException

Sets a newly allocated DbDouble object that represents the double value indicated by the ResultSet parameter and an index of the column.

Specified by:

set in class DbValue

Parameters:

rs - The ResultSet to be fetched.

col - The index of the column.

Throws:

java.sql.SQLException - if the ResultSet does not contain the index.

set

public void set(JRHierarchicalDataset hds,
                int col)
         throws java.sql.SQLException

Sets a newly allocated DbDouble object that represents the double value indicated by the JRHierarchicalDataset parameter and an index of the column.

Overrides:

set in class DbValue

Parameters:

hds - The JRHierarchicalDataset to be fetched.

col - The index of the column.

Throws:

java.sql.SQLException - if the ResultSet does not contain the index.

toString

public java.lang.String toString()

Returns a String object representing this DbDouble's value. The value is converted to signed decimal representation and returned as a string. if the value is null, it returns "NULL".

Specified by:

toString in class DbValue

Returns:

a string representation of the value of this object in base 10.

clone

public java.lang.Object clone()

Creates a clone of this DbDouble object.

Specified by:

clone in interface jet.util.DbValueable

Specified by:

clone in class DbValue

equals

public boolean equals(DbNumber v)

Compares this object to the specified object. The result is true if and only if the argument is not null but a DbDouble object that contains the same DbNumber value as this object.

Specified by:

equals in class DbNumber

Parameters:

obj - The DbNumber object to be compared with.

Returns:

true if the objects are the same; false otherwise.

byteValue

public byte byteValue()

Returns the value of this DbDouble as a byte.

Specified by:

byteValue in class DbNumber

shortValue

public short shortValue()

Returns the value of this DbDouble as a short.

Specified by:

shortValue in class DbNumber

intValue

public int intValue()

Returns the value of this DbDouble as an int.

Specified by:

intValue in class DbNumber

longValue

public long longValue()

Returns the value of this DbDouble as a long value.

Specified by:

longValue in class DbNumber

floatValue

public float floatValue()

Returns the value of this DbDouble as a float.

Specified by:

floatValue in class DbNumber

doubleValue

public double doubleValue()

Returns the value of this DbDouble as a double.

Specified by:

doubleValue in class DbNumber

setValue

public void setValue(DbNumber v)

Sets a newly allocated DbDouble object that represents the double value indicated by the DbNumber parameter. The DbNumber object will be checked to see if it is null.

Specified by:

setValue in class DbNumber

Parameters:

v - The DbNumber to be converted to a DbDouble. If it is null, the value will not be set.

setValue

public void setValue(java.lang.String v)

Sets a newly allocated DbDouble object that represents the double value indicated by the String parameter. The string is converted to a double value in exactly the manner used by the valueOf method for radix 10.

Specified by:

setValue in class DbValue

Parameters:

v - The String to be converted to a DbDouble. The argument is interpreted as representing a signed decimal double, which is exactly as if the argument were given to the valueOf method.

toStringValue

public java.lang.String toStringValue()

Specified by:

toStringValue in class DbValue

Returns:

a string which will represent the value in the DbValue(null flag and value). When compare StringValue from DbValues, we always assume that: the two DbValues have same DbColDesc. Two StringValue equals means the original DbValue equals. Does NOT transfer the compareTo(DbValue v) method. Only comparable dbValue implements this methods. String coding uses Base64.