org.faktorips.runtime.formula
Class FormulaEvaluatorUtil

java.lang.Object
  org.faktorips.runtime.formula.FormulaEvaluatorUtil

public class FormulaEvaluatorUtil
extends Object

Provides methods that can be used in formula evaluation.

Some code in formulas does not need to be generated again and again but is implemented in static methods in this class that are used by the formulas.

Since:

3.6

Author:

Daniel Schwering, Faktor Zehn AG

See Also:

IFormulaEvaluator

Nested Class Summary

static class	FormulaEvaluatorUtil.AssociationTo1Helper<S extends IModelObject,T extends IModelObject> Helper class for navigating 1-to-1 associations from a list of source objects of type <S> to target objects of type <T>.
static class	FormulaEvaluatorUtil.AssociationToManyHelper<S extends IModelObject,T extends IModelObject> Helper class for navigating 1-to-many associations from a list of source objects of type <S> to target objects of type <T>.
static class	FormulaEvaluatorUtil.AttributeAccessorHelper<S extends IModelObject,E> Helper class to get the values from a list of source objects of type <S> to target type <E>.
static class	FormulaEvaluatorUtil.ExistsHelper Helper class to encapsulate a function call to verify the existence of an object that could result in an Exception (for example a NullPointerException or IndexOutOfBoundsException when navigating over associations in model objects) which should just be treated as a false result.
static class	FormulaEvaluatorUtil.FunctionWithListAsArgumentHelper<E> Base class for functions working on list arguments.

Method Summary

static <T extends IModelObject,R extends T> List<? extends R>	getListModelObjectById(List<? extends T> modelObjects, String id) Returns all IConfigurableModelObject in the list that is configured by a IProductComponent with the given ID, the list is empty if no such object is found in the list.
static <T extends IModelObject,R extends T> R	getModelObjectById(List<? extends T> modelObjects, String id) Returns the (first) IConfigurableModelObject in the list that is configured by a IProductComponent with the given ID, null if no such object is found in the list.
static <T extends IModelObject,R extends T> R	getModelObjectById(T modelObject, String id) Returns the IModelObject if it is a IConfigurableModelObject configured by a IProductComponent with the given ID, null otherwise.

Methods inherited from class java.lang.Object

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

Method Detail

getModelObjectById

public static <T extends IModelObject,R extends T> R getModelObjectById(List<? extends T> modelObjects,
                                                                        String id)

Returns the (first) IConfigurableModelObject in the list that is configured by a IProductComponent with the given ID, null if no such object is found in the list.

Type Parameters:

T - the type of IModelObject returned by this method and expected in the list

Parameters:

modelObjects - a list of model objects of type

id - the runtime ID this method searches

Returns:

the (first) IConfigurableModelObject in the list that is configured by a IProductComponent with the given ID, null if no such object is found in the list

See Also:

getModelObjectById(IModelObject, String)

getListModelObjectById

public static <T extends IModelObject,R extends T> List<? extends R> getListModelObjectById(List<? extends T> modelObjects,
                                                                                            String id)

Returns all IConfigurableModelObject in the list that is configured by a IProductComponent with the given ID, the list is empty if no such object is found in the list.

Type Parameters:

T - the type of IModelObject returned by this method and expected in the list

Parameters:

modelObjects - a list of model objects of type

id - the runtime ID this method searches

Returns:

the all IConfigurableModelObject in the list that is configured by a IProductComponent with the given ID, the list is empty if no such object is found in the list

See Also:

getModelObjectById(IModelObject, String)

getModelObjectById

public static <T extends IModelObject,R extends T> R getModelObjectById(T modelObject,
                                                                        String id)

Returns the IModelObject if it is a IConfigurableModelObject configured by a IProductComponent with the given ID, null otherwise.

Type Parameters:

T - the type of IModelObject returned and expected by this method

Parameters:

modelObject - a model object of type

id - the runtime ID this method searches

Returns:

the IModelObject if it is a IConfigurableModelObject configured by a IProductComponent with the given ID, null otherwise

See Also:

getModelObjectById(List, String)