de.ipcon.db.oql.predicate

Class FunctionEvaluator

java.lang.Object

de.ipcon.db.oql.predicate.ExpressionEvalBase<FunctionCallNode>

de.ipcon.db.oql.predicate.FunctionEvaluator

All Implemented Interfaces:

OQLExpressionEvaluatorI<FunctionCallNode>

public class FunctionEvaluator
extends ExpressionEvalBase<FunctionCallNode>

Field Summary

Fields inherited from interface de.ipcon.db.oql.predicate.OQLExpressionEvaluatorI

INNER_JOIN_FILTERED_OUT

Constructor Summary

Constructors

Constructor and Description
FunctionEvaluator(OQLExpressionEvaluatorI<?> parent, FunctionCallNode node)

Method Summary

Modifier and Type	Method and Description
java.util.List<? extends OQLExpressionEvaluatorI<?>>	getChildren() Nonnull list of available children
java.lang.Object	getValue(BOI bo) Computes the raw value of the expression evaluated on the provided BO.

Methods inherited from class de.ipcon.db.oql.predicate.ExpressionEvalBase

getAlias, getEntity, getNode, getParameters, getParent, getSchema, of

Methods inherited from class java.lang.Object

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

Constructor Detail

FunctionEvaluator

public FunctionEvaluator(OQLExpressionEvaluatorI<?> parent,
                         FunctionCallNode node)
                  throws OQLException

Throws:

OQLException

Method Detail

getValue

public java.lang.Object getValue(BOI bo)

Description copied from interface: OQLExpressionEvaluatorI

Computes the raw value of the expression evaluated on the provided BO. Can return a flat Collection (Sets preferred) if the evaluation contains a join and has multiple results due to the internally created cross-product.

Parameters:

bo - the nonnull root BO to evaluate the node on

Returns:

the raw value of the OQL expression that this predicate represents. Can be an arbitrary return value, e.g. Strings, Boolean, INNER_JOIN_FILTERED_OUT, null, etc.

getChildren

public java.util.List<? extends OQLExpressionEvaluatorI<?>> getChildren()

Description copied from interface: OQLExpressionEvaluatorI

Nonnull list of available children

Specified by:

getChildren in interface OQLExpressionEvaluatorI<FunctionCallNode>

Overrides:

getChildren in class ExpressionEvalBase<FunctionCallNode>