org.eclipse.equinox.internal.p2.metadata.index

Class CapabilityIndex

java.lang.Object

org.eclipse.equinox.internal.p2.metadata.index.Index<IInstallableUnit>

org.eclipse.equinox.internal.p2.metadata.index.CapabilityIndex

All Implemented Interfaces:

IIndex<IInstallableUnit>

public class CapabilityIndex
extends Index<IInstallableUnit>

An in-memory implementation of a CapabilityIndex based on a Map.

Constructor Summary

Constructors

Constructor and Description
CapabilityIndex(java.util.Iterator<IInstallableUnit> itor)

Method Summary

Modifier and Type	Method and Description
java.util.Iterator<IInstallableUnit>	getCandidates(IEvaluationContext ctx, IExpression variable, IExpression booleanExpr) Obtains the elements that are candidates for the given booleanExpr when applied using the given variable as this.
protected java.lang.Object	getQueriedIDs(IEvaluationContext ctx, IExpression variable, java.lang.String memberName, IExpression booleanExpr, java.lang.Object queriedKeys)

Methods inherited from class org.eclipse.equinox.internal.p2.metadata.index.Index

concatenateUnique, isIndexedMember

Methods inherited from class java.lang.Object

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

Constructor Detail

CapabilityIndex

public CapabilityIndex(java.util.Iterator<IInstallableUnit> itor)

Method Detail

getQueriedIDs

protected java.lang.Object getQueriedIDs(IEvaluationContext ctx,
                                         IExpression variable,
                                         java.lang.String memberName,
                                         IExpression booleanExpr,
                                         java.lang.Object queriedKeys)

Overrides:

getQueriedIDs in class Index<IInstallableUnit>

getCandidates

public java.util.Iterator<IInstallableUnit> getCandidates(IEvaluationContext ctx,
                                                          IExpression variable,
                                                          IExpression booleanExpr)

Description copied from interface: IIndex

Obtains the elements that are candidates for the given booleanExpr when applied using the given variable as this. The returned set of elements are the elements that must be present in order for the expression to evaluate to true. The set may contain false positives. TODO: Write more about how the valid set of elements is determined.

Parameters:

ctx - The evaluation context used when examining the booleanExpr.

variable - The variable used as this.

booleanExpr - The boolean expression.

Returns:

The candidate elements or null if this index cannot be used.