org.openfast.template.operator
Class OperatorCodec

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

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

AlwaysPresentOperatorCodec, OptionallyPresentOperatorCodec

public abstract class OperatorCodec
extends java.lang.Object
implements java.io.Serializable

See Also:

Serialized Form

Field Summary

protected static OperatorCodec	CONSTANT_ALL
protected static OperatorCodec	COPY_ALL
protected static OperatorCodec	DEFAULT_ALL
protected static OperatorCodec	DELTA_DECIMAL
protected static OperatorCodec	DELTA_INTEGER
protected static OperatorCodec	DELTA_STRING
protected static OperatorCodec	INCREMENT_INTEGER
protected static OperatorCodec	NONE_ALL
protected static OperatorCodec	TAIL

Constructor Summary

protected

OperatorCodec(Operator operator, Type[] types)

Method Summary

boolean	canEncode(ScalarValue value, Scalar field)
abstract ScalarValue	decodeEmptyValue(ScalarValue previousValue, Scalar field)
abstract ScalarValue	decodeValue(ScalarValue newValue, ScalarValue priorValue, Scalar field)
boolean	equals(java.lang.Object obj)
static OperatorCodec	getCodec(Operator operator, Type type) Find the operator by the key
Operator	getOperator()
abstract ScalarValue	getValueToEncode(ScalarValue value, ScalarValue priorValue, Scalar field)
ScalarValue	getValueToEncode(ScalarValue value, ScalarValue priorValue, Scalar scalar, BitVectorBuilder presenceMapBuilder)
boolean	isPresenceMapBitSet(byte[] encoding, FieldValue fieldValue)
boolean	shouldDecodeType()
java.lang.String	toString()
boolean	usesPresenceMapBit(boolean optional) Use this to show that there is a MapBit present

Methods inherited from class java.lang.Object

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

Field Detail

NONE_ALL

protected static final OperatorCodec NONE_ALL

CONSTANT_ALL

protected static final OperatorCodec CONSTANT_ALL

DEFAULT_ALL

protected static final OperatorCodec DEFAULT_ALL

COPY_ALL

protected static final OperatorCodec COPY_ALL

INCREMENT_INTEGER

protected static final OperatorCodec INCREMENT_INTEGER

DELTA_INTEGER

protected static final OperatorCodec DELTA_INTEGER

DELTA_STRING

protected static final OperatorCodec DELTA_STRING

DELTA_DECIMAL

protected static final OperatorCodec DELTA_DECIMAL

TAIL

protected static final OperatorCodec TAIL

Constructor Detail

OperatorCodec

protected OperatorCodec(Operator operator,
                        Type[] types)

Parameters:

operator - The name of the Operator as a string

types - The type array to be stored in the keys

Method Detail

getCodec

public static OperatorCodec getCodec(Operator operator,
                                     Type type)

Find the operator by the key

Parameters:

operator - the fast operator

type - The type of the operator, stored to the key

Returns:

Returns the operator object with the specified key

getValueToEncode

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

decodeValue

public abstract ScalarValue decodeValue(ScalarValue newValue,
                                        ScalarValue priorValue,
                                        Scalar field)

isPresenceMapBitSet

public boolean isPresenceMapBitSet(byte[] encoding,
                                   FieldValue fieldValue)

Parameters:

encoding - The byte array that is being encoded

fieldValue - The fieldValue object to check

Returns:

Returns true if the byte array has a length larger then zero

decodeEmptyValue

public abstract ScalarValue decodeEmptyValue(ScalarValue previousValue,
                                             Scalar field)

usesPresenceMapBit

public boolean usesPresenceMapBit(boolean optional)

Use this to show that there is a MapBit present

Parameters:

optional - The Optional boolean

Returns:

Returns true

getValueToEncode

public ScalarValue getValueToEncode(ScalarValue value,
                                    ScalarValue priorValue,
                                    Scalar scalar,
                                    BitVectorBuilder presenceMapBuilder)

Parameters:

value -

priorValue -

scalar -

presenceMapBuilder -

Returns:

the value that should be encoded given the previous value

getOperator

public Operator getOperator()

canEncode

public boolean canEncode(ScalarValue value,
                         Scalar field)

shouldDecodeType

public boolean shouldDecodeType()

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object