org.apache.openjpa.kernel.exps

Class SubQ

java.lang.Object

org.apache.openjpa.kernel.exps.Val

org.apache.openjpa.kernel.exps.SubQ

All Implemented Interfaces:

Serializable, Subquery, Value

 class SubQ
extends Val
implements Subquery

An in-memory representation of a Subquery. Currently subqueries aren't supported for in-memory use.

Author:

Abe White

Constructor Summary

Constructors

Constructor and Description
SubQ(String alias)

Method Summary

Methods

Modifier and Type	Method and Description
protected Object	eval(Object candidate, Object orig, StoreContext ctx, Object[] params) Return this value for the given candidate.
String	getCandidateAlias() Return the candidate alias for this subquery.
Object	getSelect()
String	getSubqAlias()
Class	getType() Return the expected type for this value, or Object if the type is unknown.
void	setImplicitType(Class type) Set the implicit type of the value, based on how it is used in the filter.
void	setQueryExpressions(QueryExpressions q) Set the parsed subquery.
void	setSubqAlias(String subqAlias)

Methods inherited from class org.apache.openjpa.kernel.exps.Val

acceptVisit, eval, evaluate, evaluate, getAlias, getMetaData, getName, getPath, getSelectAs, isAggregate, isVariable, isXPath, setAlias, setMetaData

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.openjpa.kernel.exps.Value

acceptVisit, getAlias, getMetaData, getName, getPath, getSelectAs, isAggregate, isVariable, isXPath, setAlias, setMetaData

Constructor Detail

SubQ

public SubQ(String alias)

Method Detail

getSelect

public Object getSelect()

Specified by:

getSelect in interface Subquery

getCandidateAlias

public String getCandidateAlias()

Description copied from interface: Subquery

Return the candidate alias for this subquery.

Specified by:

getCandidateAlias in interface Subquery

setSubqAlias

public void setSubqAlias(String subqAlias)

Specified by:

setSubqAlias in interface Subquery

getSubqAlias

public String getSubqAlias()

Specified by:

getSubqAlias in interface Subquery

setQueryExpressions

public void setQueryExpressions(QueryExpressions q)

Description copied from interface: Subquery

Set the parsed subquery.

Specified by:

setQueryExpressions in interface Subquery

getType

public Class getType()

Description copied from interface: Value

Return the expected type for this value, or Object if the type is unknown.

Specified by:

getType in interface Value

setImplicitType

public void setImplicitType(Class type)

Description copied from interface: Value

Set the implicit type of the value, based on how it is used in the filter. This method is only called on values who return Object from Value.getType().

Specified by:

setImplicitType in interface Value

eval

protected Object eval(Object candidate,
          Object orig,
          StoreContext ctx,
          Object[] params)

Description copied from class: Val

Return this value for the given candidate.

Specified by:

eval in class Val