Package org.apache.cayenne.util

Class ObjectContextQueryAction

java.lang.Object

org.apache.cayenne.util.ObjectContextQueryAction

public abstract class ObjectContextQueryAction
extends Object

A helper class that implements DataChannel.onQuery(ObjectContext, Query) logic on behalf of an ObjectContext.

Intended for internal use only.

Since:

1.2

Field Summary

Fields

Modifier and Type	Field	Description
protected ObjectContext	actingContext
protected static boolean	DONE
protected QueryMetadata	metadata
protected Query	query
protected boolean	queryOriginator
protected QueryResponse	response
protected ObjectContext	targetContext

Constructor Summary

Constructors

Constructor	Description
ObjectContextQueryAction(ObjectContext actingContext, ObjectContext targetContext, Query query)

Method Summary

Modifier and Type	Method	Description
QueryResponse	execute()	Worker method that performs internal query.
protected QueryCacheEntryFactory	getCacheObjectFactory()
protected QueryCache	getQueryCache()
protected boolean	interceptInternalQuery()
protected boolean	interceptLocalCache()
protected void	interceptObjectConversion()	Transfers fetched objects into the target context if it is different from "acting" context.
protected boolean	interceptOIDQuery()
protected abstract boolean	interceptPaginatedQuery()
protected abstract boolean	interceptRefreshQuery()
protected boolean	interceptRelationshipQuery()
protected Object	polymorphicObjectFromCache(ObjectId superOid)
protected void	runQuery()	Fetches data from the channel.

Methods inherited from class java.lang.Object

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

Field Detail

DONE

protected static final boolean DONE

See Also:

Constant Field Values

targetContext

protected ObjectContext targetContext

actingContext

protected ObjectContext actingContext

query

protected Query query

metadata

protected QueryMetadata metadata

queryOriginator

protected boolean queryOriginator

response

protected transient QueryResponse response

Constructor Detail

ObjectContextQueryAction

public ObjectContextQueryAction(ObjectContext actingContext,
                                ObjectContext targetContext,
                                Query query)

Method Detail

execute

public QueryResponse execute()

Worker method that performs internal query.

interceptObjectConversion

protected void interceptObjectConversion()

Transfers fetched objects into the target context if it is different from "acting" context. Note that when this method is invoked, result objects are already registered with acting context by the parent channel.

interceptInternalQuery

protected boolean interceptInternalQuery()

interceptOIDQuery

protected boolean interceptOIDQuery()

polymorphicObjectFromCache

protected Object polymorphicObjectFromCache(ObjectId superOid)

interceptRelationshipQuery

protected boolean interceptRelationshipQuery()

interceptPaginatedQuery

protected abstract boolean interceptPaginatedQuery()

Since:

3.0

interceptRefreshQuery

protected abstract boolean interceptRefreshQuery()

Since:

3.0

interceptLocalCache

protected boolean interceptLocalCache()

Since:

3.0

getQueryCache

protected QueryCache getQueryCache()

Since:

3.0

getCacheObjectFactory

protected QueryCacheEntryFactory getCacheObjectFactory()

Since:

3.0

runQuery

protected void runQuery()

Fetches data from the channel.