org.axiondb.types
Class BaseNumberDataType

java.lang.Object
  org.axiondb.types.BaseDataType
      org.axiondb.types.BaseNumberDataType

All Implemented Interfaces:

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

Direct Known Subclasses:

BigDecimalType, BigIntType, ByteType, DoubleType, FloatType, IntegerType, ShortType, UnsignedByteType, UnsignedIntegerType, UnsignedShortType

public abstract class BaseNumberDataType
extends BaseDataType

An abstract base DataTypefor Numbertypes.

Version:

$Revision: 1.9 $ $Date: 2005/05/02 22:29:40 $

See Also:

Serialized Form

Nested Class Summary

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

DataType.BinaryRepresentation, DataType.ExactNumeric, DataType.NonFixedPrecision

Constructor Summary

BaseNumberDataType()

Method Summary

boolean	accepts(java.lang.Object value) Returns true iff value is String that can be convertedwithout exception, null, or a Number.
java.lang.Object	convert(java.lang.Object value) Returns value if value is null and throws IllegalArgumentExceptionotherwise.
boolean	supportsSuccessor() This base implementation returns true.
protected java.lang.Number	toNumber(java.lang.Object value)

Methods inherited from class org.axiondb.types.BaseDataType

compare, getColumnDisplaySize, getComparator, getJdbcType, getLiteralPrefix, getLiteralSuffix, getNullableCode, getPrecision, getPrecisionRadix, getPreferredValueClassName, getScale, getSearchableCode, isCaseSensitive, isCurrency, isUnsigned, makeNewInstance, read, successor, toBigDecimal, toBigInteger, toBlob, toBoolean, toByte, toByteArray, toClob, toDate, toDouble, toFloat, toInt, toLong, toShort, toString, toTime, toTimestamp, toURL, write

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Constructor Detail

BaseNumberDataType

public BaseNumberDataType()

Method Detail

accepts

public boolean accepts(java.lang.Object value)

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

Specified by:

accepts in interface DataType

Specified by:

accepts in class BaseDataType

Parameters:

value - non- null value

convert

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

Returns value if value is null and throws IllegalArgumentExceptionotherwise. Subclasses should override this method and call super.convert(value) as their last case.

Specified by:

convert in interface DataType

Specified by:

convert in class BaseDataType

Throws:

AxionException

supportsSuccessor

public boolean supportsSuccessor()

This base implementation returns true.

Specified by:

supportsSuccessor in interface DataType

Overrides:

supportsSuccessor in class BaseDataType

toNumber

protected java.lang.Number toNumber(java.lang.Object value)
                             throws AxionException

Overrides:

toNumber in class BaseDataType

Throws:

AxionException