com.taggercat.rules
Class DerivationList

java.lang.Object
  java.util.AbstractMap<K,V>
      java.util.HashMap<java.lang.String,Derivation>
          com.taggercat.rules.DerivationList

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.Map<java.lang.String,Derivation>

public class DerivationList
extends java.util.HashMap<java.lang.String,Derivation>

This class encapsulates the processing of a list of derivations on an entity. The derivation list is sequenced so that the derivation are executed in correct order based upon a property dependency list. The parsing and sequencing of derivation expressions is currently performed and cached at the MetadataReader instance.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

java.util.AbstractMap.SimpleEntry<K,V>, java.util.AbstractMap.SimpleImmutableEntry<K,V>

Constructor Summary

DerivationList(Model model, java.lang.String entityName)

Method Summary

void	assignDependents() Assign dependent derivations to their parent.
void	assignResults(DataSource ds, TCEntity entity, com.taggercat.el.ELContext elContext) Assigns results of the derivation expression to the target entity.

Methods inherited from class java.util.HashMap

clear, clone, containsKey, containsValue, entrySet, get, isEmpty, keySet, put, putAll, remove, size, values

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

equals, hashCode

Constructor Detail

DerivationList

public DerivationList(Model model,
                      java.lang.String entityName)

Method Detail

assignDependents

public void assignDependents()

Assign dependent derivations to their parent. Where a dependent derivation is one who's terms include the target property of a parent derivation ( if any).

assignResults

public void assignResults(DataSource ds,
                          TCEntity entity,
                          com.taggercat.el.ELContext elContext)
                   throws PropertyValueException

Assigns results of the derivation expression to the target entity.

Throws:

java.lang.Exception

PropertyValueException

Parameters:

ds - the owning data source

entity - the target entity