org.janusgraph.graphdb.query

Class BackendQueryHolder<E extends BackendQuery<E>>

java.lang.Object

org.janusgraph.graphdb.query.BackendQueryHolder<E>

All Implemented Interfaces:

ProfileObservable

public class BackendQueryHolder<E extends BackendQuery<E>>
extends Object
implements ProfileObservable

Holds a BackendQuery and captures additional information that pertains to its execution and to be used by a QueryExecutor:

• Whether the query is fitted, i.e., whether all results returned from executing the backend query are part of the result set or must be filtered in memory.
• Whether the query results will already be sorted in the user defined sort order or whether extra sorting is required.
• Additional execution info required by the query executor. This would be compiled by the query optimizer and is passed through verbatim. Can be null.

Author:

Matthias Broecheler ([email protected])

Constructor Summary

Constructors

Constructor and Description
BackendQueryHolder(E backendQuery, boolean fitted, boolean sorted)
BackendQueryHolder(E backendQuery, boolean fitted, boolean sorted, Object executionInfo)

Method Summary

Modifier and Type	Method and Description
E	getBackendQuery()
Object	getExecutionInfo()
QueryProfiler	getProfiler()
boolean	isFitted()
boolean	isSorted()
void	observeWith(QueryProfiler parentProfiler, boolean hasSiblings)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.janusgraph.graphdb.query.profile.ProfileObservable

observeWith

Constructor Detail

BackendQueryHolder

public BackendQueryHolder(E backendQuery,
                          boolean fitted,
                          boolean sorted,
                          Object executionInfo)

BackendQueryHolder

public BackendQueryHolder(E backendQuery,
                          boolean fitted,
                          boolean sorted)

Method Detail

getExecutionInfo

public Object getExecutionInfo()

isFitted

public boolean isFitted()

isSorted

public boolean isSorted()

getBackendQuery

public E getBackendQuery()

getProfiler

public QueryProfiler getProfiler()

Specified by:

getProfiler in interface ProfileObservable

observeWith

public void observeWith(QueryProfiler parentProfiler,
                        boolean hasSiblings)

Specified by:

observeWith in interface ProfileObservable