org.apache.jackrabbit.oak.plugins.index.property

Class PropertyIndexLookup

java.lang.Object

org.apache.jackrabbit.oak.plugins.index.property.PropertyIndexLookup

public class PropertyIndexLookup
extends Object

Is responsible for querying the property index content.
This class can be used directly on a subtree where there is an index defined by supplying a NodeState root.

 {
     NodeState state = ... // get a node state
     PropertyIndexLookup lookup = new PropertyIndexLookup(state);
     Set<String> hits = lookup.find("foo", PropertyValues.newString("xyz"));
 }
 

Field Summary

Fields

Modifier and Type	Field and Description
static double	COST_OVERHEAD The cost overhead to use the index in number of read operations.

Constructor Summary

Constructors

Constructor and Description
PropertyIndexLookup(NodeState root)
PropertyIndexLookup(NodeState root, MountInfoProvider mountInfoProvider)

Method Summary

Modifier and Type	Method and Description
double	getCost(Filter filter, String propertyName, PropertyValue value)
boolean	isIndexed(String propertyName, String path, Filter filter) Checks whether the named property is indexed somewhere along the given path.
Iterable<String>	query(Filter filter, String propertyName, PropertyValue value)

Methods inherited from class java.lang.Object

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

Field Detail

COST_OVERHEAD

public static final double COST_OVERHEAD

The cost overhead to use the index in number of read operations.

See Also:

Constant Field Values

Constructor Detail

PropertyIndexLookup

public PropertyIndexLookup(NodeState root)

PropertyIndexLookup

public PropertyIndexLookup(NodeState root,
                           MountInfoProvider mountInfoProvider)

Method Detail

isIndexed

public boolean isIndexed(String propertyName,
                         String path,
                         Filter filter)

Checks whether the named property is indexed somewhere along the given path. Lookup starts at the current path (at the root of this object) and traverses down the path.

Parameters:

propertyName - property name

path - lookup path

filter - for the node type restriction (null if no node type restriction)

Returns:

true if the property is indexed

query

public Iterable<String> query(Filter filter,
                              String propertyName,
                              PropertyValue value)

getCost

public double getCost(Filter filter,
                      String propertyName,
                      PropertyValue value)