org.maltparser.core.feature.map
Class PrefixFeature

java.lang.Object
  org.maltparser.core.feature.map.PrefixFeature

All Implemented Interfaces:

FeatureFunction, FeatureMapFunction, Function

public class PrefixFeature
extends Object
implements FeatureMapFunction

Author:

Johan Hall

Field Summary

protected ColumnDescription	column
protected DataFormatInstance	dataFormatInstance
protected MultipleFeatureValue	multipleFeatureValue
protected FeatureFunction	parentFeature
protected int	prefixLength
protected SymbolTable	table
protected SymbolTableHandler	tableHandler

Constructor Summary

PrefixFeature(DataFormatInstance dataFormatInstance)

Method Summary

boolean	equals(Object obj)
int	getCode(String symbol) Returns the integer representation of the string symbol according to the feature function.
ColumnDescription	getColumn()
DataFormatInstance	getDataFormatInstance()
FeatureValue	getFeatureValue() Returns the feature value
String	getMapIdentifier()
Class<?>[]	getParameterTypes() Returns an array of class types used by the feature extraction system to invoke initialize with correct arguments.
FeatureFunction	getParentFeature()
int	getPrefixLength()
String	getSymbol(int code) Returns the string representation of the integer code according to the feature function.
SymbolTable	getSymbolTable() Returns the symbol table used by the feature function.
SymbolTableHandler	getTableHandler()
int	getType()
void	initialize(Object[] arguments) Initialize the feature function
protected void	setColumn(ColumnDescription column)
void	setDataFormatInstance(DataFormatInstance dataFormatInstance)
void	setParentFeature(FeatureFunction feature)
void	setPrefixLength(int prefixLength)
void	setSymbolTable(SymbolTable table)
String	toString()
void	update() Cause the feature function to update the feature value.
void	updateCardinality()

Methods inherited from class java.lang.Object

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

Field Detail

parentFeature

protected FeatureFunction parentFeature

multipleFeatureValue

protected MultipleFeatureValue multipleFeatureValue

tableHandler

protected SymbolTableHandler tableHandler

table

protected SymbolTable table

dataFormatInstance

protected DataFormatInstance dataFormatInstance

column

protected ColumnDescription column

prefixLength

protected int prefixLength

Constructor Detail

PrefixFeature

public PrefixFeature(DataFormatInstance dataFormatInstance)
              throws MaltChainedException

Throws:

MaltChainedException

Method Detail

initialize

public void initialize(Object[] arguments)
                throws MaltChainedException

Description copied from interface: Function

Initialize the feature function

Specified by:

initialize in interface Function

Parameters:

arguments - an array of arguments with the type returned by getParameterTypes()

Throws:

MaltChainedException

getParameterTypes

public Class<?>[] getParameterTypes()

Description copied from interface: Function

Returns an array of class types used by the feature extraction system to invoke initialize with correct arguments.

Specified by:

getParameterTypes in interface Function

Returns:

an array of class types

getFeatureValue

public FeatureValue getFeatureValue()

Description copied from interface: FeatureFunction

Returns the feature value

Specified by:

getFeatureValue in interface FeatureFunction

Returns:

the feature value

getCode

public int getCode(String symbol)
            throws MaltChainedException

Description copied from interface: FeatureFunction

Returns the integer representation of the string symbol according to the feature function.

Specified by:

getCode in interface FeatureFunction

Parameters:

symbol - the string representation of the symbol

Returns:

the integer representation of the string symbol according to the feature function.

Throws:

MaltChainedException

getSymbol

public String getSymbol(int code)
                 throws MaltChainedException

Description copied from interface: FeatureFunction

Returns the string representation of the integer code according to the feature function.

Specified by:

getSymbol in interface FeatureFunction

Parameters:

code - the integer representation of the symbol

Returns:

the string representation of the integer code according to the feature function.

Throws:

MaltChainedException

update

public void update()
            throws MaltChainedException

Description copied from interface: Function

Cause the feature function to update the feature value.

Specified by:

update in interface Function

Throws:

MaltChainedException

updateCardinality

public void updateCardinality()
                       throws MaltChainedException

Throws:

MaltChainedException

getParentFeature

public FeatureFunction getParentFeature()

setParentFeature

public void setParentFeature(FeatureFunction feature)

getPrefixLength

public int getPrefixLength()

setPrefixLength

public void setPrefixLength(int prefixLength)

getTableHandler

public SymbolTableHandler getTableHandler()

getSymbolTable

public SymbolTable getSymbolTable()

Description copied from interface: FeatureFunction

Returns the symbol table used by the feature function.

Specified by:

getSymbolTable in interface FeatureFunction

Returns:

the symbol table used by the feature function.

setSymbolTable

public void setSymbolTable(SymbolTable table)

getDataFormatInstance

public DataFormatInstance getDataFormatInstance()

setDataFormatInstance

public void setDataFormatInstance(DataFormatInstance dataFormatInstance)

getColumn

public ColumnDescription getColumn()

setColumn

protected void setColumn(ColumnDescription column)

getType

public int getType()

Specified by:

getType in interface FeatureFunction

getMapIdentifier

public String getMapIdentifier()

Specified by:

getMapIdentifier in interface FeatureFunction

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object