de.ipcon.db.castor

Class WithInterfaceEvaluator

java.lang.Object

de.ipcon.db.castor.MEXTransformerEvaluator

de.ipcon.db.castor.IdListEvaluator

de.ipcon.db.castor.WithInterfaceEvaluator

All Implemented Interfaces:

MEXTransformerEvaluatorI

public class WithInterfaceEvaluator
extends IdListEvaluator

MEXTransformerEvaluator class for inserting lists of BOT (Business Object Type) IDs for all entities that implement one or more specific Java interfaces.

This evaluator is essential for polymorphic queries where the underlying storage does not support interface-based querying directly. It scans the entity schema for any BOT that implements the requested interface(s) and returns their discriminators.

Example usage: "SELECT o FROM Order o WHERE o.TypeId IN ({WithInterface com.app.Exportable})"

Constructor Summary

Constructors

Constructor and Description
WithInterfaceEvaluator(MEXPersistenceQueryResults _mexQR) Constructs a new WithInterfaceEvaluator.

Method Summary

Modifier and Type	Method and Description
boolean	canHandle(java.lang.CharSequence s) Checks if the instruction can be handled by this evaluator.
java.lang.CharSequence	evaluate(java.lang.CharSequence s, MEXTransformer transformer) Processes the "WithInterface" instruction and replaces it with a formatted list of IDs.
java.lang.String[]	getGroups(java.lang.CharSequence s) Parses the instruction and extracts the interface name group.

Methods inherited from class java.lang.Object

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

Constructor Detail

WithInterfaceEvaluator

public WithInterfaceEvaluator(MEXPersistenceQueryResults _mexQR)

Constructs a new WithInterfaceEvaluator.

Parameters:

_mexQR - the MEX query results interface providing access to persistence handlers.

Method Detail

canHandle

public boolean canHandle(java.lang.CharSequence s)

Checks if the instruction can be handled by this evaluator.

Overrides:

canHandle in class IdListEvaluator

Parameters:

s - the character sequence to inspect.

Returns:

true if the sequence matches the "WithInterface" tag.

getGroups

public java.lang.String[] getGroups(java.lang.CharSequence s)
                             throws MEXParseException

Parses the instruction and extracts the interface name group.

Overrides:

getGroups in class IdListEvaluator

Parameters:

s - the raw instruction sequence.

Returns:

a String array containing the raw list of interface names.

Throws:

MEXParseException - if the syntax does not match PATTERN_WITHINTERFACE_FULL.

evaluate

public java.lang.CharSequence evaluate(java.lang.CharSequence s,
                                       MEXTransformer transformer)

Processes the "WithInterface" instruction and replaces it with a formatted list of IDs.

Specified by:

evaluate in interface MEXTransformerEvaluatorI

Overrides:

evaluate in class IdListEvaluator

Parameters:

s - the instruction sequence.

transformer - the active transformer.

Returns:

the resolved ID list string (e.g. "10, 11, 15") or the original string if not handled.