org.apache.cayenne.util
Class ObjectContextQueryAction

java.lang.Object
  extended by 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
protected  ObjectContext actingContext
           
protected static boolean DONE
           
protected  QueryMetadata metadata
           
protected  Query query
           
protected  boolean queryOriginator
           
protected  QueryResponse response
           
protected  ObjectContext targetContext
           
 
Constructor Summary
ObjectContextQueryAction(ObjectContext actingContext, ObjectContext targetContext, Query query)
           
 
Method Summary
 QueryResponse execute()
          Worker method that performs internal query.
protected  QueryCacheEntryFactory getCacheObjectFactory()
           
protected abstract  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  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()

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 abstract QueryCache getQueryCache()
Since:
3.0

getCacheObjectFactory

protected QueryCacheEntryFactory getCacheObjectFactory()
Since:
3.0

runQuery

protected void runQuery()
Fetches data from the channel.



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