Package org.kie.dmn.feel.util

Class EvalHelper

  • public class EvalHelper
extends java.lang.Object

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static org.slf4j.Logger LOG  

    • Constructor Summary

      Constructors 
      Constructor Description
      EvalHelper()  

    • Method Summary

      All Methods Static Methods Concrete Methods Deprecated Methods 
      Modifier and Type Method Description
      static void clearGenericAccessorCache()  
      static java.lang.Object coerceNumber​(java.lang.Object value)  
      static java.lang.Boolean compare​(java.lang.Object left, java.lang.Object right, EvaluationContext ctx, java.util.function.BiPredicate<java.lang.Comparable,​java.lang.Comparable> op)
      Compares left and right operands using the given predicate and returns TRUE/FALSE accordingly
      static java.lang.reflect.Method getAccessor​(java.lang.Class<?> clazz, java.lang.String field)
      JavaBean -spec compliant accessor.
      static java.math.BigDecimal getBigDecimalOrNull​(java.lang.Object value)  
      static java.lang.Boolean getBooleanOrNull​(java.lang.Object value)  
      static EvalHelper.PropertyValueResult getDefinedValue​(java.lang.Object current, java.lang.String property)  
      static java.lang.reflect.Method getGenericAccessor​(java.lang.Class<?> clazz, java.lang.String field)
      FEEL annotated or else Java accessor.
      static java.lang.Object getValue​(java.lang.Object current, java.lang.String property)
      Deprecated.
      this method cannot distinguish null because: 1. property undefined for current, 2. an error, 3. a properly defined property value valorized to null.
      static java.lang.Boolean isEqual​(java.lang.Object left, java.lang.Object right, EvaluationContext ctx)
      Compares left and right for equality applying FEEL semantics to specific data types
      static java.lang.Boolean isEqualDateTimeInSemanticD​(java.time.temporal.TemporalAccessor left, java.time.temporal.TemporalAccessor right)
      DMNv1.2 Table 48: Specific semantics of equality DMNv1.3 Table 71: Semantic of date and time functions
      static java.lang.Boolean isEqualTimeInSemanticD​(java.time.temporal.TemporalAccessor left, java.time.temporal.TemporalAccessor right)
      DMNv1.2 Table 48: Specific semantics of equality DMNv1.3 Table 71: Semantic of date and time functions
      static java.lang.String lcFirst​(java.lang.String name)  
      static java.lang.String normalizeVariableName​(java.lang.String name)  
      static java.util.Optional<java.lang.String> propertyFromAccessor​(java.lang.reflect.Method accessor)
      Inverse of getAccessor(Class, String)
      static java.lang.String ucFirst​(java.lang.String name)  
      static java.lang.String unescapeString​(java.lang.String text)  

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • LOG

        public static final org.slf4j.Logger LOG

    • Constructor Detail

      • EvalHelper

        public EvalHelper()

    • Method Detail

      • normalizeVariableName

        public static java.lang.String normalizeVariableName​(java.lang.String name)

      • getBigDecimalOrNull

        public static java.math.BigDecimal getBigDecimalOrNull​(java.lang.Object value)

      • coerceNumber

        public static java.lang.Object coerceNumber​(java.lang.Object value)

      • getBooleanOrNull

        public static java.lang.Boolean getBooleanOrNull​(java.lang.Object value)

      • unescapeString

        public static java.lang.String unescapeString​(java.lang.String text)

      • getValue

        public static java.lang.Object getValue​(java.lang.Object current,
                                        java.lang.String property)
        Deprecated.
        this method cannot distinguish null because: 1. property undefined for current, 2. an error, 3. a properly defined property value valorized to null.
        getDefinedValue(Object, String) method instead.

      • getGenericAccessor

        public static java.lang.reflect.Method getGenericAccessor​(java.lang.Class<?> clazz,
                                                          java.lang.String field)
        FEEL annotated or else Java accessor.
        Parameters:
        clazz -
        field -
        Returns:

      • clearGenericAccessorCache

        public static void clearGenericAccessorCache()

      • getAccessor

        public static java.lang.reflect.Method getAccessor​(java.lang.Class<?> clazz,
                                                   java.lang.String field)
        JavaBean -spec compliant accessor.
        Parameters:
        clazz -
        field -
        Returns:

      • propertyFromAccessor

        public static java.util.Optional<java.lang.String> propertyFromAccessor​(java.lang.reflect.Method accessor)
        Inverse of getAccessor(Class, String)

      • ucFirst

        public static java.lang.String ucFirst​(java.lang.String name)

      • lcFirst

        public static java.lang.String lcFirst​(java.lang.String name)

      • compare

        public static java.lang.Boolean compare​(java.lang.Object left,
                                        java.lang.Object right,
                                        EvaluationContext ctx,
                                        java.util.function.BiPredicate<java.lang.Comparable,​java.lang.Comparable> op)
        Compares left and right operands using the given predicate and returns TRUE/FALSE accordingly
        Parameters:
        left -
        right -
        ctx -
        op -
        Returns:

      • isEqual

        public static java.lang.Boolean isEqual​(java.lang.Object left,
                                        java.lang.Object right,
                                        EvaluationContext ctx)
        Compares left and right for equality applying FEEL semantics to specific data types
        Parameters:
        left -
        right -
        ctx -
        Returns:

      • isEqualDateTimeInSemanticD

        public static java.lang.Boolean isEqualDateTimeInSemanticD​(java.time.temporal.TemporalAccessor left,
                                                           java.time.temporal.TemporalAccessor right)
        DMNv1.2 Table 48: Specific semantics of equality DMNv1.3 Table 71: Semantic of date and time functions

      • isEqualTimeInSemanticD

        public static java.lang.Boolean isEqualTimeInSemanticD​(java.time.temporal.TemporalAccessor left,
                                                       java.time.temporal.TemporalAccessor right)
        DMNv1.2 Table 48: Specific semantics of equality DMNv1.3 Table 71: Semantic of date and time functions