TypeRegistry (libformula JavaDoc)

Interface TypeRegistry

public interface TypeRegistry

The type registry manages the known value types.

Author: Thomas Morgner

Method Summary
TypeValuePair	convertTo(Type targetType, TypeValuePair valuePair) Checks whether the target type would accept the specified value object and value type.
Date	convertToDate(Type type1, Object value) Converts the object of the given type into a date.
Boolean	convertToLogical(Type type1, Object value) Converts the object of the given type into a boolean.
Number	convertToNumber(Type type1, Object value) Converts the object of the given type into a number.
NumberSequence	convertToNumberSequence(Type type, Object value, boolean strictTypeChecks) Converts the given (type,value) pair into a numeric sequence.
Sequence	convertToSequence(Type type, Object value)
String	convertToText(Type type1, Object value) (This conversion is used by the operator implementations.)
ExtendedComparator	getComparator(Type type1, Type type2) Returns an comparator for the given types.
Type	guessTypeOfObject(Object o)

Method Summary

TypeValuePair

convertTo(Type targetType, TypeValuePair valuePair)

Checks whether the target type would accept the specified value object and value type.

Date

convertToDate(Type type1, Object value)

Converts the object of the given type into a date.

Boolean

convertToLogical(Type type1, Object value)

Converts the object of the given type into a boolean.

Number

convertToNumber(Type type1, Object value)

Converts the object of the given type into a number.

NumberSequence

convertToNumberSequence(Type type, Object value, boolean strictTypeChecks)

Converts the given (type,value) pair into a numeric sequence.

Sequence

convertToSequence(Type type, Object value)

String

convertToText(Type type1, Object value)

(This conversion is used by the operator implementations.)

ExtendedComparator

getComparator(Type type1, Type type2)

Returns an comparator for the given types.

Type

guessTypeOfObject(Object o)

Method Detail

convertTo

Checks whether the target type would accept the specified value object and value type. (This conversion is used by the functions.)

Parameters: targetType valuePair

convertToDate

Converts the object of the given type into a date.

Parameters: type1 value

Returns: The value as Date or null.

convertToLogical

Converts the object of the given type into a boolean.

Parameters: type1 value

Returns: The value as Boolean or null.

convertToNumber

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.

Throws: TypeConversionException if the type cannot be represented as number.

convertToNumberSequence

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:

Throws: TypeConversionException

convertToSequence

convertToText

(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.

Throws: TypeConversionException

getComparator

Returns an comparator for the given types.

Parameters: type1 type2

Returns: