org.grouplens.lenskit.symbols

Class SymbolValue<T>

java.lang.Object

org.grouplens.lenskit.symbols.SymbolValue<T>

Direct Known Subclasses:

DoubleSymbolValue

public abstract class SymbolValue<T>
extends Object

A pairing of a TypedSymbol with a value of the same type.

Since:

2.0

Author:

GroupLens Research

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object other)
static com.google.common.base.Function<SymbolValue<?>,TypedSymbol<?>>	extractSymbol()
Symbol	getRawSymbol() Get the raw Symbol from the symbol value.
abstract TypedSymbol<T>	getSymbol()
abstract T	getValue()
int	hashCode()
static com.google.common.base.Predicate<SymbolValue<?>>	hasSymbol(TypedSymbol<?> sym)
static DoubleSymbolValue	of(Symbol sym, double val) Create an unboxed symbol value.
static DoubleSymbolValue	of(TypedSymbol<Double> sym, double val) Create an unboxed symbol value.
static <T> SymbolValue<T>	of(TypedSymbol<T> sym, T val) Create a typed symbol value.

Methods inherited from class java.lang.Object

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

Method Detail

of

public static <T> SymbolValue<T> of(TypedSymbol<T> sym,
                    T val)

Create a typed symbol value.

Type Parameters:

T - The type of the symbol.

Parameters:

sym - The symbol.

val - The value.

Returns:

A pair of the symbol and value.

of

public static DoubleSymbolValue of(TypedSymbol<Double> sym,
                   double val)

Create an unboxed symbol value.

Parameters:

sym - The symbol.

val - The value.

Returns:

A pair of the symbol and value.

of

public static DoubleSymbolValue of(Symbol sym,
                   double val)

Create an unboxed symbol value.

Parameters:

sym - The symbol.

val - The value.

Returns:

A pair of the symbol and value.

getSymbol

public abstract TypedSymbol<T> getSymbol()

getRawSymbol

public Symbol getRawSymbol()

Get the raw Symbol from the symbol value.

Returns:

The raw Symbol.

getValue

public abstract T getValue()

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

hasSymbol

public static com.google.common.base.Predicate<SymbolValue<?>> hasSymbol(TypedSymbol<?> sym)

extractSymbol

public static com.google.common.base.Function<SymbolValue<?>,TypedSymbol<?>> extractSymbol()