Package org.drools.scenariosimulation.backend.expression

Class AbstractExpressionEvaluator

java.lang.Object

org.drools.scenariosimulation.backend.expression.AbstractExpressionEvaluator

All Implemented Interfaces:

ExpressionEvaluator

Direct Known Subclasses:

BaseExpressionEvaluator, DMNFeelExpressionEvaluator

public abstract class AbstractExpressionEvaluator
extends Object
implements ExpressionEvaluator

Constructor Summary

Constructors

Constructor	Description
AbstractExpressionEvaluator()

Method Summary

Modifier and Type	Method	Description
protected Object	convertResult(String rawString, String className, List<String> genericClasses)
protected List<Object>	createAndFillList(com.fasterxml.jackson.databind.node.ArrayNode json, List<Object> toReturn, String className, List<String> genericClasses)
protected Object	createAndFillObject(com.fasterxml.jackson.databind.node.ObjectNode json, Object toReturn, String className, List<String> genericClasses)
protected abstract Object	createObject(String className, List<String> genericClasses)
Object	evaluateLiteralExpression(String rawExpression, String className, List<String> genericClasses)
ExpressionEvaluatorResult	evaluateUnaryExpression(String rawExpression, Object resultValue, Class<?> resultClass)
protected abstract Object	extractFieldValue(Object result, String fieldName)
protected abstract Map.Entry<String,List<String>>	getFieldClassNameAndGenerics(Object element, String fieldName, String className, List<String> genericClasses)	Return a pair with field className as key and list of generics as value
protected String	getSimpleTypeNodeTextValue(com.fasterxml.jackson.databind.JsonNode jsonNode)	Return text value of a simple type node
protected abstract Object	internalLiteralEvaluation(String raw, String className)
protected abstract boolean	internalUnaryEvaluation(String rawExpression, Object resultValue, Class<?> resultClass, boolean skipEmptyString)
protected boolean	isEmptyText(com.fasterxml.jackson.databind.JsonNode jsonNode)	Verify if given json node text is empty
protected boolean	isListEmpty(com.fasterxml.jackson.databind.node.ArrayNode json)	Verify if all elements of given json array are empty
protected boolean	isNodeEmpty(com.fasterxml.jackson.databind.JsonNode json)	Verify if given json node has all final values as empty strings
protected boolean	isObjectEmpty(com.fasterxml.jackson.databind.node.ObjectNode json)	Verify if all fields of given json object are empty
protected boolean	isSimpleTypeNode(com.fasterxml.jackson.databind.JsonNode jsonNode)	A node represent a simple type if it is an object with only one field named "value"
protected boolean	isStructuredInput(String className)	Check if className represents a structured input
protected boolean	isStructuredResult(Class<?> resultClass)	Check if resultClass represents a structured result
protected abstract void	setField(Object toReturn, String fieldName, Object fieldValue)
protected ExpressionEvaluatorResult	verifyList(com.fasterxml.jackson.databind.node.ArrayNode json, List<Object> resultRaw)
protected ExpressionEvaluatorResult	verifyObject(com.fasterxml.jackson.databind.node.ObjectNode json, Object resultRaw)
protected ExpressionEvaluatorResult	verifyResult(String rawExpression, Object resultRaw, Class<?> resultClass)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.drools.scenariosimulation.backend.expression.ExpressionEvaluator

fromObjectToExpression

Constructor Detail

AbstractExpressionEvaluator

public AbstractExpressionEvaluator()

Method Detail

evaluateLiteralExpression

public Object evaluateLiteralExpression(String rawExpression,
                                        String className,
                                        List<String> genericClasses)

Specified by:

evaluateLiteralExpression in interface ExpressionEvaluator

evaluateUnaryExpression

public ExpressionEvaluatorResult evaluateUnaryExpression(String rawExpression,
                                                         Object resultValue,
                                                         Class<?> resultClass)

Specified by:

evaluateUnaryExpression in interface ExpressionEvaluator

isStructuredResult

protected boolean isStructuredResult(Class<?> resultClass)

Check if resultClass represents a structured result

Parameters:

resultClass -

Returns:

isStructuredInput

protected boolean isStructuredInput(String className)

Check if className represents a structured input

Parameters:

className -

Returns:

convertResult

protected Object convertResult(String rawString,
                               String className,
                               List<String> genericClasses)

createAndFillList

protected List<Object> createAndFillList(com.fasterxml.jackson.databind.node.ArrayNode json,
                                         List<Object> toReturn,
                                         String className,
                                         List<String> genericClasses)

createAndFillObject

protected Object createAndFillObject(com.fasterxml.jackson.databind.node.ObjectNode json,
                                     Object toReturn,
                                     String className,
                                     List<String> genericClasses)

verifyResult

protected ExpressionEvaluatorResult verifyResult(String rawExpression,
                                                 Object resultRaw,
                                                 Class<?> resultClass)

verifyList

protected ExpressionEvaluatorResult verifyList(com.fasterxml.jackson.databind.node.ArrayNode json,
                                               List<Object> resultRaw)

verifyObject

protected ExpressionEvaluatorResult verifyObject(com.fasterxml.jackson.databind.node.ObjectNode json,
                                                 Object resultRaw)

isNodeEmpty

protected boolean isNodeEmpty(com.fasterxml.jackson.databind.JsonNode json)

Verify if given json node has all final values as empty strings

Parameters:

json -

Returns:

isListEmpty

protected boolean isListEmpty(com.fasterxml.jackson.databind.node.ArrayNode json)

Verify if all elements of given json array are empty

Parameters:

json -

Returns:

isObjectEmpty

protected boolean isObjectEmpty(com.fasterxml.jackson.databind.node.ObjectNode json)

Verify if all fields of given json object are empty

Parameters:

json -

Returns:

isEmptyText

protected boolean isEmptyText(com.fasterxml.jackson.databind.JsonNode jsonNode)

Verify if given json node text is empty

Parameters:

jsonNode -

Returns:

isSimpleTypeNode

protected boolean isSimpleTypeNode(com.fasterxml.jackson.databind.JsonNode jsonNode)

A node represent a simple type if it is an object with only one field named "value"

Parameters:

jsonNode -

Returns:

getSimpleTypeNodeTextValue

protected String getSimpleTypeNodeTextValue(com.fasterxml.jackson.databind.JsonNode jsonNode)

Return text value of a simple type node

Parameters:

jsonNode -

Returns:

internalUnaryEvaluation

protected abstract boolean internalUnaryEvaluation(String rawExpression,
                                                   Object resultValue,
                                                   Class<?> resultClass,
                                                   boolean skipEmptyString)

internalLiteralEvaluation

protected abstract Object internalLiteralEvaluation(String raw,
                                                    String className)

extractFieldValue

protected abstract Object extractFieldValue(Object result,
                                            String fieldName)

createObject

protected abstract Object createObject(String className,
                                       List<String> genericClasses)

setField

protected abstract void setField(Object toReturn,
                                 String fieldName,
                                 Object fieldValue)

getFieldClassNameAndGenerics

protected abstract Map.Entry<String,List<String>> getFieldClassNameAndGenerics(Object element,
                                                                                     String fieldName,
                                                                                     String className,
                                                                                     List<String> genericClasses)

Return a pair with field className as key and list of generics as value

Parameters:

element - : instance to be populated

fieldName - : field to analyze

className - : canonical class name of instance

genericClasses - : list of generics related to this field

Returns: