org.javarosa.core.model.condition

Class EvaluationContext

java.lang.Object

org.javarosa.core.model.condition.EvaluationContext

public class EvaluationContext
extends Object

A collection of objects that affect the evaluation of an expression, like function handlers and (not supported) variable bindings.

Field Summary

Fields

Modifier and Type	Field and Description
IAnswerData	candidateValue
boolean	isCheckAddChild
boolean	isConstraint

Constructor Summary

Constructors

Constructor and Description
EvaluationContext(DataInstance instance)
EvaluationContext(DataInstance instance, HashMap<String,DataInstance> formInstances)
EvaluationContext(DataInstance instance, HashMap<String,DataInstance> formInstances, EvaluationContext base)
EvaluationContext(EvaluationContext base, HashMap<String,DataInstance> formInstances, TreeReference context)
EvaluationContext(EvaluationContext base, List<FilterStrategy> beforeFilterStrategyChain)
EvaluationContext(EvaluationContext base, TreeReference context)

Method Summary

Modifier and Type	Method and Description
void	addFallbackFunctionHandler(IFallbackFunctionHandler handler)
void	addFunctionHandler(IFunctionHandler fh)
List<TreeReference>	expandReference(TreeReference ref)
List<TreeReference>	expandReference(TreeReference ref, boolean includeTemplates) Searches for all repeated nodes that match the pattern of the 'ref' argument.
int	getContextPosition()
TreeReference	getContextRef()
IFallbackFunctionHandler	getFallbackFunctionHandler()
HashMap<String,IFunctionHandler>	getFunctionHandlers()
DataInstance	getInstance(String id)
DataInstance	getMainInstance()
TreeReference	getOriginalContext()
String	getOutputTextForm()
Object	getVariable(String name)
EvaluationContext	rescope(TreeReference treeRef, int currentContextPosition)
AbstractTreeElement	resolveReference(TreeReference qualifiedRef)
void	setOriginalContext(TreeReference ref)
void	setOutputTextForm(String form)
void	setPredicateProcessSet(int[] loadingDetails)
void	setVariable(String name, Object value)
void	setVariables(HashMap<String,?> variables)

Methods inherited from class java.lang.Object

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

Field Detail

isConstraint

public boolean isConstraint

candidateValue

public IAnswerData candidateValue

isCheckAddChild

public boolean isCheckAddChild

Constructor Detail

EvaluationContext

public EvaluationContext(EvaluationContext base,
                         List<FilterStrategy> beforeFilterStrategyChain)

EvaluationContext

public EvaluationContext(EvaluationContext base,
                         TreeReference context)

EvaluationContext

public EvaluationContext(EvaluationContext base,
                         HashMap<String,DataInstance> formInstances,
                         TreeReference context)

EvaluationContext

public EvaluationContext(DataInstance instance,
                         HashMap<String,DataInstance> formInstances,
                         EvaluationContext base)

EvaluationContext

public EvaluationContext(DataInstance instance)

EvaluationContext

public EvaluationContext(DataInstance instance,
                         HashMap<String,DataInstance> formInstances)

Method Detail

getInstance

public DataInstance getInstance(String id)

getContextRef

public TreeReference getContextRef()

setOriginalContext

public void setOriginalContext(TreeReference ref)

getOriginalContext

public TreeReference getOriginalContext()

addFallbackFunctionHandler

public void addFallbackFunctionHandler(IFallbackFunctionHandler handler)

addFunctionHandler

public void addFunctionHandler(IFunctionHandler fh)

getFallbackFunctionHandler

public IFallbackFunctionHandler getFallbackFunctionHandler()

getFunctionHandlers

public HashMap<String,IFunctionHandler> getFunctionHandlers()

setOutputTextForm

public void setOutputTextForm(String form)

getOutputTextForm

public String getOutputTextForm()

setVariables

public void setVariables(HashMap<String,?> variables)

setVariable

public void setVariable(String name,
                        Object value)

getVariable

public Object getVariable(String name)

expandReference

public List<TreeReference> expandReference(TreeReference ref)

expandReference

public List<TreeReference> expandReference(TreeReference ref,
                                           boolean includeTemplates)

Searches for all repeated nodes that match the pattern of the 'ref' argument.

'/' returns {'/'} can handle sub-repetitions (e.g., {/a[1]/b[1], /a[1]/b[2], /a[2]/b[1]})

Parameters:

ref - Potentially ambiguous reference

Returns:

Null if 'ref' is relative reference. Otherwise, returns a vector of references that point to nodes that match 'ref' argument. These references are unambiguous (no index will ever be INDEX_UNBOUND). Template nodes won't be included when matching INDEX_UNBOUND, but will be when INDEX_TEMPLATE is explicitly set.

rescope

public EvaluationContext rescope(TreeReference treeRef,
                                 int currentContextPosition)

getMainInstance

public DataInstance getMainInstance()

resolveReference

public AbstractTreeElement resolveReference(TreeReference qualifiedRef)

getContextPosition

public int getContextPosition()

setPredicateProcessSet

public void setPredicateProcessSet(int[] loadingDetails)