org.openfast.template.operator
Class OptionallyPresentOperatorCodec

java.lang.Object
  org.openfast.template.operator.OperatorCodec
      org.openfast.template.operator.OptionallyPresentOperatorCodec

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

CopyOperatorCodec

public abstract class OptionallyPresentOperatorCodec
extends OperatorCodec

See Also:

Serialized Form

Field Summary

Fields inherited from class org.openfast.template.operator.OperatorCodec

CONSTANT_ALL, COPY_ALL, DEFAULT_ALL, DELTA_DECIMAL, DELTA_INTEGER, DELTA_STRING, INCREMENT_INTEGER, NONE_ALL, TAIL

Constructor Summary

protected

OptionallyPresentOperatorCodec(Operator operator, Type[] types)

Method Summary

ScalarValue	decodeEmptyValue(ScalarValue priorValue, Scalar field)
protected abstract ScalarValue	getEmptyValue(ScalarValue priorValue)
protected abstract ScalarValue	getInitialValue(Scalar field)
ScalarValue	getValueToEncode(ScalarValue value, ScalarValue priorValue, Scalar field)
protected abstract ScalarValue	getValueToEncode(ScalarValue value, ScalarValue priorValue, ScalarValue defaultValue)

Methods inherited from class org.openfast.template.operator.OperatorCodec

canEncode, decodeValue, equals, getCodec, getOperator, getValueToEncode, isPresenceMapBitSet, shouldDecodeType, toString, usesPresenceMapBit

Methods inherited from class java.lang.Object

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

Constructor Detail

OptionallyPresentOperatorCodec

protected OptionallyPresentOperatorCodec(Operator operator,
                                         Type[] types)

Method Detail

decodeEmptyValue

public ScalarValue decodeEmptyValue(ScalarValue priorValue,
                                    Scalar field)

Specified by:

decodeEmptyValue in class OperatorCodec

Parameters:

priorValue -

field -

Returns:

the value that should be used if no value is present in the fast stream

getValueToEncode

public ScalarValue getValueToEncode(ScalarValue value,
                                    ScalarValue priorValue,
                                    Scalar field)

Specified by:

getValueToEncode in class OperatorCodec

Parameters:

value -

priorValue -

field -

Returns:

the value that should be encoded over the fast stream given the previous value for this field

getValueToEncode

protected abstract ScalarValue getValueToEncode(ScalarValue value,
                                                ScalarValue priorValue,
                                                ScalarValue defaultValue)

getInitialValue

protected abstract ScalarValue getInitialValue(Scalar field)

getEmptyValue

protected abstract ScalarValue getEmptyValue(ScalarValue priorValue)