Package com.google.gerrit.index.query

Class IndexedQuery<I,T>

java.lang.Object

com.google.gerrit.index.query.Predicate<T>

com.google.gerrit.index.query.IndexedQuery<I,T>

Type Parameters:

I - The type of the IDs by which the entities are stored in the index.

T - The type of the entities that are stored in the index.

All Implemented Interfaces:

DataSource<T>, Paginated<T>

Direct Known Subclasses:

IndexedAccountQuery, IndexedChangeQuery, IndexedGroupQuery

public class IndexedQuery<I,T>
extends Predicate<T>
implements DataSource<T>, Paginated<T>

Wrapper combining an IndexPredicate together with a DataSource that returns matching results from the index.

Appropriate to return as the rootmost predicate that can be processed using the secondary index; such predicates must also implement DataSource to be chosen by the query processor.

Field Summary

Fields

Modifier and Type	Field	Description
protected Index<I,T>	index
protected DataSource<T>	source

Constructor Summary

Constructors

Constructor	Description
IndexedQuery(Index<I,T> index, Predicate<T> pred, QueryOptions opts)

Method Summary

Modifier and Type	Method	Description
Predicate<T>	copy(Collection<? extends Predicate<T>> children)	Create a copy of this predicate, with new children.
boolean	equals(Object other)
int	getCardinality()	Returns an estimate of the number of results from DataSource.read().
Predicate<T>	getChild(int i)	Same as getChildren().get(i)
int	getChildCount()	Same as getChildren().size()
List<Predicate<T>>	getChildren()	Get the children of this predicate, if any.
QueryOptions	getOptions()
int	hashCode()
ResultSet<T>	read()	Returns read from the database and return the results.
ResultSet<FieldBundle>	readRaw()	Returns read from the database and return the raw results.
ResultSet<T>	restart(int start)
String	toString()

Methods inherited from class com.google.gerrit.index.query.Predicate

and, and, any, asMatchable, estimateCost, getFlattenedPredicateList, getLeafCount, getPredicateString, isLeaf, isMatchable, not, or, or, supportedForQueries

Methods inherited from class java.lang.Object

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

Field Detail

index

protected final Index<I,T> index

source

protected DataSource<T> source

Constructor Detail

IndexedQuery

public IndexedQuery(Index<I,T> index,
                    Predicate<T> pred,
                    QueryOptions opts)
             throws QueryParseException

Throws:

QueryParseException

Method Detail

getChildCount

public int getChildCount()

Description copied from class: Predicate

Same as getChildren().size()

Overrides:

getChildCount in class Predicate<T>

getChild

public Predicate<T> getChild(int i)

Description copied from class: Predicate

Same as getChildren().get(i)

Overrides:

getChild in class Predicate<T>

getChildren

public List<Predicate<T>> getChildren()

Description copied from class: Predicate

Get the children of this predicate, if any.

Overrides:

getChildren in class Predicate<T>

getOptions

public QueryOptions getOptions()

Specified by:

getOptions in interface Paginated<I>

getCardinality

public int getCardinality()

Description copied from interface: DataSource

Returns an estimate of the number of results from DataSource.read().

Specified by:

getCardinality in interface DataSource<I>

read

public ResultSet<T> read()

Description copied from interface: DataSource

Returns read from the database and return the results.

Specified by:

read in interface DataSource<I>

readRaw

public ResultSet<FieldBundle> readRaw()

Description copied from interface: DataSource

Returns read from the database and return the raw results.

Specified by:

readRaw in interface DataSource<I>

restart

public ResultSet<T> restart(int start)

Specified by:

restart in interface Paginated<I>

copy

public Predicate<T> copy(Collection<? extends Predicate<T>> children)

Description copied from class: Predicate

Create a copy of this predicate, with new children.

Specified by:

copy in class Predicate<T>

hashCode

public int hashCode()

Specified by:

hashCode in class Predicate<T>

equals

public boolean equals(Object other)

Specified by:

equals in class Predicate<T>

toString

public String toString()

Overrides:

toString in class Object