org.axiondb.types

Class BigDecimalType

java.lang.Object

org.axiondb.types.BaseDataType

org.axiondb.types.BaseNumberDataType

org.axiondb.types.BigDecimalType

All Implemented Interfaces:

java.io.Serializable, java.util.Comparator, DataType, DataType.ExactNumeric, DataType.NonFixedPrecision, DataTypeFactory

public class BigDecimalType
extends BaseNumberDataType
implements DataType.ExactNumeric

A DataTyperepresenting an number value.

Version:

$Revision: 1.16 $ $Date: 2005/12/22 09:02:31 $

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.axiondb.DataType

DataType.BinaryRepresentation, DataType.ExactNumeric, DataType.NonFixedPrecision

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_PRECISION
static int	DEFAULT_SCALE
static int	MAX_PRECISION
static int	ROUNDING_RULE

Constructor Summary

Constructors

Constructor and Description
BigDecimalType()
BigDecimalType(java.math.BigDecimal result)
BigDecimalType(int scale)
BigDecimalType(int precision, int scale)

Method Summary

Modifier and Type	Method and Description
boolean	accepts(java.lang.Object value) Returns true iff value is String that can be convertedwithout exception, null, or a Number.
int	compare(java.lang.Object a, java.lang.Object b)
java.lang.Object	convert(java.lang.Object value) Returns a BigDecimal converted from the given value , or throws IllegalArgumentExceptionif the given value isn't acceptable.
int	getColumnDisplaySize() Value returned by ResultSetMetaData#getColumnDisplaySizefor this data type.
protected java.util.Comparator	getComparator() This base implementation simply returns a ComparableComparator.
int	getJdbcType() Returns the JDBC type codemost closely matching this type.
int	getPrecision() Value returned by ResultSetMetaData#getPrecisionfor this data type.
java.lang.String	getPreferredValueClassName() Returns the "normal" type returned by DataType.convert(java.lang.Object).
int	getScale() Value returned by ResultSetMetaData#getScalefor this data type.
DataType	makeNewInstance() Creates a new instance of this DataType implementation.
DataType.ExactNumeric	makeNewInstance(int newPrecision, int newScale) Creates a new instance of the implementing ExactNumeric type with the given precision and scale.
java.lang.Object	read(java.io.DataInput in) Instantiate an object of my type from the given DataInput.
boolean	requiresRounding(java.math.BigDecimal value)
void	setPrecision(int newPrecision) Overrides the default precision with the given value.
void	setScale(int newScale) Overrides the default scale with the given value.
java.lang.Object	successor(java.lang.Object value) Returns the successor for the given value.
boolean	supportsSuccessor() false
java.lang.String	toString() Returns "BigDecimal"
void	write(java.lang.Object value, java.io.DataOutput out) Write an object of my type to the given DataOutput.

Methods inherited from class org.axiondb.types.BaseNumberDataType

toNumber

Methods inherited from class org.axiondb.types.BaseDataType

getLiteralPrefix, getLiteralSuffix, getNullableCode, getPrecisionRadix, getSearchableCode, isCaseSensitive, isCurrency, isUnsigned, toBigDecimal, toBigInteger, toBlob, toBoolean, toByte, toByteArray, toClob, toDate, toDouble, toFloat, toInt, toLong, toShort, toString, toTime, toTimestamp, toURL

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.axiondb.DataType

getLiteralPrefix, getLiteralSuffix, getNullableCode, getPrecisionRadix, getSearchableCode, isCaseSensitive, isCurrency, isUnsigned, toBigDecimal, toBigInteger, toBlob, toBoolean, toByte, toByteArray, toClob, toDate, toDouble, toFloat, toInt, toLong, toShort, toString, toTime, toTimestamp, toURL

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Field Detail

ROUNDING_RULE

public static final int ROUNDING_RULE

See Also:

Constant Field Values

DEFAULT_PRECISION

public static final int DEFAULT_PRECISION

See Also:

Constant Field Values

DEFAULT_SCALE

public static final int DEFAULT_SCALE

See Also:

Constant Field Values

MAX_PRECISION

public static final int MAX_PRECISION

See Also:

Constant Field Values

Constructor Detail

BigDecimalType

public BigDecimalType()

BigDecimalType

public BigDecimalType(int scale)

BigDecimalType

public BigDecimalType(int precision,
                      int scale)

BigDecimalType

public BigDecimalType(java.math.BigDecimal result)

Method Detail

getColumnDisplaySize

public int getColumnDisplaySize()

Description copied from interface: DataType

Value returned by ResultSetMetaData#getColumnDisplaySizefor this data type.

Specified by:

getColumnDisplaySize in interface DataType

Overrides:

getColumnDisplaySize in class BaseDataType

See Also:

ResultSetMetaData.getColumnDisplaySize(int)

getPrecision

public int getPrecision()

Description copied from interface: DataType

Value returned by ResultSetMetaData#getPrecisionfor this data type.

Specified by:

getPrecision in interface DataType

Overrides:

getPrecision in class BaseDataType

See Also:

ResultSetMetaData.getPrecision(int)

getJdbcType

public int getJdbcType()

Description copied from interface: DataType

Returns the JDBC type codemost closely matching this type.

Specified by:

getJdbcType in interface DataType

Specified by:

getJdbcType in class BaseDataType

getPreferredValueClassName

public java.lang.String getPreferredValueClassName()

Description copied from interface: DataType

Returns the "normal" type returned by DataType.convert(java.lang.Object). Returns java.lang.Object if unknown.

Specified by:

getPreferredValueClassName in interface DataType

Overrides:

getPreferredValueClassName in class BaseDataType

See Also:

AxionResultSetMetaData.getColumnClassName(int)

getScale

public int getScale()

Description copied from interface: DataType

Value returned by ResultSetMetaData#getScalefor this data type.

Specified by:

getScale in interface DataType

Overrides:

getScale in class BaseDataType

See Also:

ResultSetMetaData.getScale(int)

setPrecision

public void setPrecision(int newPrecision)

Description copied from interface: DataType.NonFixedPrecision

Overrides the default precision with the given value.

Specified by:

setPrecision in interface DataType.NonFixedPrecision

Parameters:

newPrecision - new precision value. The appropriate value depends on the precision radix, which is fixed for each implementing type.

setScale

public void setScale(int newScale)

Description copied from interface: DataType.ExactNumeric

Overrides the default scale with the given value.

Specified by:

setScale in interface DataType.ExactNumeric

Parameters:

newScale - new scale value. The appropriate value depends on the current precision and radix - precision can be modified by the user, but the radix is fixed for each implementing type.

toString

public java.lang.String toString()

Returns "BigDecimal"

Overrides:

toString in class java.lang.Object

Returns:

"BigDecimal"

accepts

public boolean accepts(java.lang.Object value)

Description copied from class: BaseNumberDataType

Returns true iff value is String that can be convertedwithout exception, null, or a Number.

Specified by:

accepts in interface DataType

Overrides:

accepts in class BaseNumberDataType

Parameters:

value - non- null value

requiresRounding

public boolean requiresRounding(java.math.BigDecimal value)

convert

public java.lang.Object convert(java.lang.Object value)
                         throws AxionException

Returns a BigDecimal converted from the given value , or throws IllegalArgumentExceptionif the given value isn't acceptable.

Specified by:

convert in interface DataType

Overrides:

convert in class BaseNumberDataType

Throws:

AxionException

read

public java.lang.Object read(java.io.DataInput in)
                      throws java.io.IOException

Description copied from interface: DataType

Instantiate an object of my type from the given DataInput. The next sequence of bytes to be read from the DataInput will have been written by DataType.write(java.lang.Object, java.io.DataOutput).

Specified by:

read in interface DataType

Specified by:

read in class BaseDataType

Throws:

java.io.IOException

See Also:

write(java.lang.Object, java.io.DataOutput)

supportsSuccessor

public boolean supportsSuccessor()

false

Specified by:

supportsSuccessor in interface DataType

Overrides:

supportsSuccessor in class BaseNumberDataType

successor

public java.lang.Object successor(java.lang.Object value)
                           throws java.lang.IllegalArgumentException

Description copied from interface: DataType

Returns the successor for the given value. For example, the successor of the integer 1 is 2.

Specified by:

successor in interface DataType

Overrides:

successor in class BaseDataType

Throws:

java.lang.IllegalArgumentException

write

public void write(java.lang.Object value,
                  java.io.DataOutput out)
           throws java.io.IOException

Description copied from interface: DataType

Write an object of my type to the given DataOutput.

Specified by:

write in interface DataType

Specified by:

write in class BaseDataType

Parameters:

value - the value to write, which must be acceptableto this DataType

Throws:

java.io.IOException

makeNewInstance

public DataType makeNewInstance()

Description copied from interface: DataType

Creates a new instance of this DataType implementation.

Specified by:

makeNewInstance in interface DataType

Specified by:

makeNewInstance in interface DataTypeFactory

Specified by:

makeNewInstance in class BaseDataType

Returns:

new instance of this DataType implementation.

compare

public int compare(java.lang.Object a,
                   java.lang.Object b)

Specified by:

compare in interface java.util.Comparator

Overrides:

compare in class BaseDataType

makeNewInstance

public DataType.ExactNumeric makeNewInstance(int newPrecision,
                                             int newScale)

Description copied from interface: DataType.ExactNumeric

Creates a new instance of the implementing ExactNumeric type with the given precision and scale.

Specified by:

makeNewInstance in interface DataType.ExactNumeric

Parameters:

newPrecision - precision of the new instance

newScale - scale of the new instance

Returns:

new instance of ExactNumeric implementation with the given precision and scale

getComparator

protected java.util.Comparator getComparator()

Description copied from class: BaseDataType

This base implementation simply returns a ComparableComparator.

Overrides:

getComparator in class BaseDataType