com.yahoo.search.query.profile.compiled

Class Binding

java.lang.Object

com.yahoo.search.query.profile.compiled.Binding

All Implemented Interfaces:

Comparable<Binding>

public class Binding
extends Object
implements Comparable<Binding>

An immutable binding of a set of dimensions to values. This binding is minimal in that it only includes dimensions which actually have values.

Author:

bratseth

Field Summary

Fields

Modifier and Type	Field and Description
private String[]	dimensions The dimensions of this.
private String[]	dimensionValues The values of those dimensions.
private int	generality A higher number means this is more general.
private int	hashCode
private static int	maxDimensions
static Binding	nullBinding

Constructor Summary

Constructors

Modifier	Constructor and Description
private	Binding(int generality, Map<String,String> binding)

Method Summary

Modifier and Type	Method and Description
int	compareTo(Binding other) Implements a partial ordering where more specific bindings come before less specific ones, taking both the number of bindings and their positions into account (earlier dimensions take precedence over later ones.
static Binding	createFrom(DimensionBinding dimensionBinding)
boolean	equals(Object o) Returns whether the given binding has exactly the same values as this
int	hashCode()
boolean	isNull() Returns true only if this binding is null (contains no values for its dimensions (if any)
boolean	matches(Map<String,String> context) Returns true if all the dimension values in this have the same values in the given context.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

maxDimensions

private static final int maxDimensions

See Also:

Constant Field Values

generality

private final int generality

A higher number means this is more general. This accounts for both the number and position of the bindings in the dimensional space, such that bindings in earlier dimensions are matched before bindings in later dimensions

dimensions

private final String[] dimensions

The dimensions of this. Unenforced invariant: Content never changes.

dimensionValues

private final String[] dimensionValues

The values of those dimensions. Unenforced invariant: Content never changes.

hashCode

private final int hashCode

nullBinding

public static final Binding nullBinding

Constructor Detail

Binding

private Binding(int generality,
                Map<String,String> binding)

Method Detail

createFrom

public static Binding createFrom(DimensionBinding dimensionBinding)

isNull

public boolean isNull()

Returns true only if this binding is null (contains no values for its dimensions (if any)

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Returns whether the given binding has exactly the same values as this

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

matches

public boolean matches(Map<String,String> context)

Returns true if all the dimension values in this have the same values in the given context.

compareTo

public int compareTo(Binding other)

Implements a partial ordering where more specific bindings come before less specific ones, taking both the number of bindings and their positions into account (earlier dimensions take precedence over later ones.

The order is not well defined for bindings in different dimensional spaces.

Specified by:

compareTo in interface Comparable<Binding>