org.axiondb.types
Class LongType

java.lang.Object
  extended byorg.axiondb.types.BaseDataType
      extended byorg.axiondb.types.BaseNumberDataType
          extended byorg.axiondb.types.LongType
All Implemented Interfaces:
Comparator, DataType, DataTypeFactory, Serializable

public class LongType
extends BaseNumberDataType

A DataType representing a long value.

Version:
$Revision: 1.10 $ $Date: 2004/09/09 23:47:42 $
See Also:
Serialized Form

Constructor Summary
LongType()
           
 
Method Summary
 boolean accepts(Object value)
          Returns true iff value is String that can be converted without exception, null, or a Number.
 int compare(Object a, Object b)
           
 Object convert(Object value)
          Returns an Long converted from the given value, or throws IllegalArgumentException if the given value isn't acceptable.
protected  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.
 String getPreferredValueClassName()
          Returns the "normal" type returned by convert(java.lang.Object).
 DataType makeNewInstance()
           
 Object read(DataInput in)
          Instantiate an object of my type from the given DataInput.
 Object successor(Object value)
          Returns the successor for the given value.
 String toString()
           
 void write(Object value, DataOutput out)
          Writes the given value to the given DataOutput.
 
Methods inherited from class org.axiondb.types.BaseNumberDataType
supportsSuccessor, toNumber
 
Methods inherited from class org.axiondb.types.BaseDataType
getColumnDisplaySize, getLiteralPrefix, getLiteralSuffix, getNullableCode, getScale, 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 java.util.Comparator
equals
 

Constructor Detail

LongType

public LongType()
Method Detail

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 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)

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

toString

public String toString()

accepts

public boolean accepts(Object value)
Returns true iff value is String that can be converted without exception, null, or a Number.

Specified by:
accepts in interface DataType
Overrides:
accepts in class BaseNumberDataType

convert

public Object convert(Object value)
               throws IllegalArgumentException
Returns an Long converted from the given value, or throws IllegalArgumentException if the given value isn't acceptable.

Specified by:
convert in interface DataType
Overrides:
convert in class BaseNumberDataType
Throws:
IllegalArgumentException

successor

public Object successor(Object value)
                 throws 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:
IllegalArgumentException

read

public Object read(DataInput in)
            throws 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:
IOException
See Also:
write(java.lang.Object, java.io.DataOutput)

write

public void write(Object value,
                  DataOutput out)
           throws IOException
Writes the given value to the given DataOutput. Null values are written as Long.MIN_VALUE, false. Long.MIN_VALUE values are written as Long.MIN_VALUE, true. All other values are written directly.

Specified by:
write in interface DataType
Specified by:
write in class BaseDataType
Parameters:
value - the value to write, which must be acceptable
Throws:
IOException

makeNewInstance

public DataType makeNewInstance()
Specified by:
makeNewInstance in interface DataTypeFactory
Specified by:
makeNewInstance in class BaseDataType

compare

public int compare(Object a,
                   Object b)
Specified by:
compare in interface Comparator
Overrides:
compare in class BaseDataType

getComparator

protected Comparator getComparator()
Description copied from class: BaseDataType
This base implementation simply returns a ComparableComparator.

Overrides:
getComparator in class BaseDataType