org.kie.dmn.feel.lang.impl

Class FEELImpl

java.lang.Object

org.kie.dmn.feel.lang.impl.FEELImpl

All Implemented Interfaces:

FEEL

public class FEELImpl
extends Object
implements FEEL

Language runtime entry point

Constructor Summary

Constructors

Constructor and Description
FEELImpl()
FEELImpl(ClassLoader cl)
FEELImpl(ClassLoader cl, List<FEELProfile> profiles)
FEELImpl(List<FEELProfile> profiles)

Method Summary

Modifier and Type	Method and Description
void	addListener(org.kie.dmn.api.feel.runtime.events.FEELEventListener listener) Registers a new event listener into this FEEL instance.
CompiledExpression	compile(String expression, CompilerContext ctx) Compiles the string expression using the given compiler context.
ProcessedUnaryTest	compileUnaryTests(String expressions, CompilerContext ctx) Compiles the string expression using the given compiler context.
Object	evaluate(CompiledExpression expr, EvaluationContext ctx) Evaluates the given compiled FEEL expression using the given EvaluationContext, and returns the result
Object	evaluate(CompiledExpression expr, Map<String,Object> inputVariables) Evaluates the given compiled FEEL expression using the given input variables, and returns the result
Object	evaluate(String expression) Evaluates the given FEEL expression and returns the result
Object	evaluate(String expression, EvaluationContext ctx) Evaluates the given FEEL expression using the given EvaluationContext, and returns the result
Object	evaluate(String expression, Map<String,Object> inputVariables) Evaluates the given FEEL expression using the given input variables, and returns the result
List<UnaryTest>	evaluateUnaryTests(String expression) Evaluates the given expression as a list of of unary tests.
List<UnaryTest>	evaluateUnaryTests(String expression, Map<String,Type> variableTypes) Evaluates the given expression as a list of of unary tests.
com.github.javaparser.ast.CompilationUnit	generateExpressionSource(String expression, CompilerContext ctx)
Collection<FEELFunction>	getCustomFunctions()
FEELEventListenersManager	getEventsManager(Collection<org.kie.dmn.api.feel.runtime.events.FEELEventListener> contextListeners)
Set<org.kie.dmn.api.feel.runtime.events.FEELEventListener>	getListeners() Retrieves the set of registered event listeners
CompilerContext	newCompilerContext() Factory method to create a new compiler context
CompilerContext	newCompilerContext(Collection<org.kie.dmn.api.feel.runtime.events.FEELEventListener> contextListeners)
EvaluationContextImpl	newEvaluationContext(ClassLoader cl, Collection<org.kie.dmn.api.feel.runtime.events.FEELEventListener> listeners, Map<String,Object> inputVariables) Creates a new EvaluationContext with the supplied classloader, and the supplied parameters listeners and inputVariables
EvaluationContextImpl	newEvaluationContext(Collection<org.kie.dmn.api.feel.runtime.events.FEELEventListener> listeners, Map<String,Object> inputVariables) Creates a new EvaluationContext using this FEEL instance classloader, and the supplied parameters listeners and inputVariables
void	removeListener(org.kie.dmn.api.feel.runtime.events.FEELEventListener listener) Removes a listener from the list of event listeners.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.kie.dmn.feel.FEEL

newInstance, newInstance, newInstance, newInstance

Constructor Detail

FEELImpl

public FEELImpl()

FEELImpl

public FEELImpl(ClassLoader cl)

FEELImpl

public FEELImpl(List<FEELProfile> profiles)

FEELImpl

public FEELImpl(ClassLoader cl,
                List<FEELProfile> profiles)

Method Detail

newCompilerContext

public CompilerContext newCompilerContext()

Description copied from interface: FEEL

Factory method to create a new compiler context

Specified by:

newCompilerContext in interface FEEL

Returns:

compiler context with default options set

newCompilerContext

public CompilerContext newCompilerContext(Collection<org.kie.dmn.api.feel.runtime.events.FEELEventListener> contextListeners)

getCustomFunctions

public Collection<FEELFunction> getCustomFunctions()

compile

public CompiledExpression compile(String expression,
                                  CompilerContext ctx)

Description copied from interface: FEEL

Compiles the string expression using the given compiler context.

Specified by:

compile in interface FEEL

Parameters:

expression - a FEEL expression

ctx - a compiler context

Returns:

the compiled expression

generateExpressionSource

public com.github.javaparser.ast.CompilationUnit generateExpressionSource(String expression,
                                                                          CompilerContext ctx)

compileUnaryTests

public ProcessedUnaryTest compileUnaryTests(String expressions,
                                            CompilerContext ctx)

Description copied from interface: FEEL

Compiles the string expression using the given compiler context.

Specified by:

compileUnaryTests in interface FEEL

Parameters:

expressions - a FEEL expression for unary tests

ctx - a compiler context

Returns:

the compiled unary tests

evaluate

public Object evaluate(String expression)

Description copied from interface: FEEL

Evaluates the given FEEL expression and returns the result

Specified by:

evaluate in interface FEEL

Parameters:

expression - a FEEL expression

Returns:

the result of the evaluation of the expression

evaluate

public Object evaluate(String expression,
                       EvaluationContext ctx)

Description copied from interface: FEEL

Evaluates the given FEEL expression using the given EvaluationContext, and returns the result

Specified by:

evaluate in interface FEEL

Parameters:

expression - a FEEL expression

ctx - the EvaluationContext to be used for defining input variables and additional feel event listeners contextual to this method call

Returns:

the result of the evaluation of the expression.

evaluate

public Object evaluate(String expression,
                       Map<String,Object> inputVariables)

Description copied from interface: FEEL

Evaluates the given FEEL expression using the given input variables, and returns the result

Specified by:

evaluate in interface FEEL

Parameters:

expression - a FEEL expression

inputVariables - a map of input Variables. The keys on the map are the variable names, that need to follow the naming rules for the FEEL language. The values on the map are the corresponding values for the variables. It is completely fine to use a previously returned FEEL context as inputVariables.

Returns:

the result of the evaluation of the expression.

evaluate

public Object evaluate(CompiledExpression expr,
                       Map<String,Object> inputVariables)

Description copied from interface: FEEL

Evaluates the given compiled FEEL expression using the given input variables, and returns the result

Specified by:

evaluate in interface FEEL

Parameters:

expr - a FEEL expression

inputVariables - a map of input Variables. The keys on the map are the variable names, that need to follow the naming rules for the FEEL language. The values on the map are the corresponding values for the variables. It is completely fine to use a previously returned FEEL context as inputVariables.

Returns:

the result of the evaluation of the expression.

evaluate

public Object evaluate(CompiledExpression expr,
                       EvaluationContext ctx)

Description copied from interface: FEEL

Evaluates the given compiled FEEL expression using the given EvaluationContext, and returns the result

Specified by:

evaluate in interface FEEL

ctx - the EvaluationContext to be used for defining input variables and additional feel event listeners contextual to this method call

Returns:

the result of the evaluation of the expression.

newEvaluationContext

public EvaluationContextImpl newEvaluationContext(Collection<org.kie.dmn.api.feel.runtime.events.FEELEventListener> listeners,
                                                  Map<String,Object> inputVariables)

Creates a new EvaluationContext using this FEEL instance classloader, and the supplied parameters listeners and inputVariables

newEvaluationContext

public EvaluationContextImpl newEvaluationContext(ClassLoader cl,
                                                  Collection<org.kie.dmn.api.feel.runtime.events.FEELEventListener> listeners,
                                                  Map<String,Object> inputVariables)

Creates a new EvaluationContext with the supplied classloader, and the supplied parameters listeners and inputVariables

evaluateUnaryTests

public List<UnaryTest> evaluateUnaryTests(String expression)

Description copied from interface: FEEL

Evaluates the given expression as a list of of unary tests. The syntax for this is defined in the FEEL grammar rule #17, i.e., a list of unary tests separated by commas.

Specified by:

evaluateUnaryTests in interface FEEL

Parameters:

expression - a unary test list expression

Returns:

a List of compiled UnaryTests

evaluateUnaryTests

public List<UnaryTest> evaluateUnaryTests(String expression,
                                          Map<String,Type> variableTypes)

Description copied from interface: FEEL

Evaluates the given expression as a list of of unary tests. The syntax for this is defined in the FEEL grammar rule #17, i.e., a list of unary tests separated by commas.

Specified by:

evaluateUnaryTests in interface FEEL

Parameters:

expression - a unary test list expression

variableTypes - map of variable names and corresponding types, necessary to compile the unary tests

Returns:

a List of compiled UnaryTests

addListener

public void addListener(org.kie.dmn.api.feel.runtime.events.FEELEventListener listener)

Description copied from interface: FEEL

Registers a new event listener into this FEEL instance. The event listeners are notified about signitificative events during compilation or evaluation of expressions.

Specified by:

addListener in interface FEEL

Parameters:

listener - the listener to register

removeListener

public void removeListener(org.kie.dmn.api.feel.runtime.events.FEELEventListener listener)

Description copied from interface: FEEL

Removes a listener from the list of event listeners.

Specified by:

removeListener in interface FEEL

Parameters:

listener - the listener to remove

getListeners

public Set<org.kie.dmn.api.feel.runtime.events.FEELEventListener> getListeners()

Description copied from interface: FEEL

Retrieves the set of registered event listeners

Specified by:

getListeners in interface FEEL

Returns:

the set of listeners

getEventsManager

public FEELEventListenersManager getEventsManager(Collection<org.kie.dmn.api.feel.runtime.events.FEELEventListener> contextListeners)