Interface TypeRegistry

All Known Implementing Classes:
DefaultTypeRegistry

public interface TypeRegistry
The type registry manages the known value types.
Author:
Thomas Morgner
  • Method Details

    • getComparator

      ExtendedComparator getComparator(Type type1, Type type2)
      Returns an comparator for the given types.
      Parameters:
      type1 -
      type2 -
      Returns:
    • convertToNumber

      Number convertToNumber(Type type1, Object value) throws EvaluationException
      Converts the object of the given type into a number. If the object is not convertible, a NumberFormatException is thrown. (This conversion is used by the operator implementations.)
      Parameters:
      type1 -
      value -
      Returns:
      the value as number or ZERO if the value is unconvertible.
    • convertToText

      String convertToText(Type type1, Object value) throws EvaluationException
      (This conversion is used by the operator implementations.)
      Parameters:
      type1 -
      value -
      Returns:
      the value as string or an empty string, if the value given is null.
    • convertToLogical

      Boolean convertToLogical(Type type1, Object value) throws EvaluationException
      Converts the object of the given type into a boolean.
      Parameters:
      type1 -
      value -
      Returns:
      The value as Boolean or null.
      Throws:
      EvaluationException
    • convertToDate

      Date convertToDate(Type type1, Object value) throws EvaluationException
      Converts the object of the given type into a date.
      Parameters:
      type1 -
      value -
      Returns:
      The value as Date or null.
      Throws:
      EvaluationException
    • convertToNumberSequence

      NumberSequence convertToNumberSequence(Type type, Object value, boolean strictTypeChecks) throws EvaluationException
      Converts the given (type,value) pair into a numeric sequence. If the flag "strictTypeChecks" is set to true, the value sequence will only evaluate numeric values. A non-strict sequence will treat text as zero and logical values as 0 or 1.
      Parameters:
      type -
      value -
      strictTypeChecks -
      Returns:
    • convertToSequence

      Sequence convertToSequence(Type type, Object value) throws EvaluationException
      Throws:
      EvaluationException
    • convertToArray

      ArrayCallback convertToArray(Type type, Object value) throws EvaluationException
      Throws:
      EvaluationException
    • convertTo

      TypeValuePair convertTo(Type targetType, TypeValuePair valuePair) throws EvaluationException
      Checks whether the target type would accept the specified value object and value type. (This conversion is used by the functions.)
      Parameters:
      targetType -
      valuePair -
      Throws:
      EvaluationException
    • guessTypeOfObject

      Type guessTypeOfObject(Object o)