com.google.gerrit.server.index.change

Class IndexedChangeQuery

java.lang.Object

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

com.google.gerrit.index.query.IndexedQuery<Change.Id,ChangeData>

com.google.gerrit.server.index.change.IndexedChangeQuery

All Implemented Interfaces:

DataSource<ChangeData>, Matchable<ChangeData>, Paginated<ChangeData>, ChangeDataSource

public class IndexedChangeQuery
extends IndexedQuery<Change.Id,ChangeData>
implements ChangeDataSource, Matchable<ChangeData>

Wrapper combining an IndexPredicate together with a ChangeDataSource 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 ChangeDataSource to be chosen by the query processor.

Field Summary

Fields inherited from class com.google.gerrit.index.query.IndexedQuery

index, source

Constructor Summary

Constructors

Constructor and Description
IndexedChangeQuery(ChangeIndex index, Predicate<ChangeData> pred, QueryOptions opts)

Method Summary

Modifier and Type	Method and Description
static QueryOptions	createOptions(IndexConfig config, int start, int limit, java.util.Set<java.lang.String> fields)
int	getCost()
boolean	hasChange()
boolean	match(ChangeData cd) Does this predicate match this object?
static QueryOptions	oneResult()
ResultSet<ChangeData>	read()

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

copy, equals, getCardinality, getChild, getChildCount, getChildren, getOptions, hashCode, readRaw, restart, toString

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

and, and, any, asMatchable, estimateCost, getLeafCount, isMatchable, not, or, or

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.google.gerrit.index.query.DataSource

getCardinality, readRaw

Constructor Detail

IndexedChangeQuery

public IndexedChangeQuery(ChangeIndex index,
                          Predicate<ChangeData> pred,
                          QueryOptions opts)
                   throws QueryParseException

Throws:

QueryParseException

Method Detail

oneResult

public static QueryOptions oneResult()

createOptions

public static QueryOptions createOptions(IndexConfig config,
                                         int start,
                                         int limit,
                                         java.util.Set<java.lang.String> fields)

read

public ResultSet<ChangeData> read()

Specified by:

read in interface DataSource<ChangeData>

Overrides:

read in class IndexedQuery<Change.Id,ChangeData>

Returns:

read from the database and return the results.

match

public boolean match(ChangeData cd)

Description copied from interface: Matchable

Does this predicate match this object?

Specified by:

match in interface Matchable<ChangeData>

getCost

public int getCost()

Specified by:

getCost in interface Matchable<ChangeData>

Returns:

a cost estimate to run this predicate, higher figures cost more.

hasChange

public boolean hasChange()

Specified by:

hasChange in interface ChangeDataSource

Returns:

true if all returned ChangeData.hasChange() will be true.