org.yarnandtail.andhow.valuetype

Class DblType

java.lang.Object

org.yarnandtail.andhow.valuetype.BaseValueType<Double>

org.yarnandtail.andhow.valuetype.DblType

All Implemented Interfaces:

ValueType<Double>

public class DblType
extends BaseValueType<Double>

Metadata and parsing for configuration Properties of the Double type.

This class is threadsafe and uses a singleton pattern to prevent multiple instances, since all users can safely share the same instance.

Field Summary

Fields inherited from class org.yarnandtail.andhow.valuetype.BaseValueType

clazzType

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DblType()

Method Summary

Modifier and Type	Method and Description
Double	cast(Object o) Attempt to cast the object to the generic type T, which is a concrete class in subclasses.
static DblType	instance() Fetch the single, shared instace of this ValueType
Double	parse(String sourceValue) Parses a String to a Double.

Methods inherited from class org.yarnandtail.andhow.valuetype.BaseValueType

getDestinationType, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

DblType

protected DblType()

Method Detail

instance

public static DblType instance()

Fetch the single, shared instace of this ValueType

Returns:

An instance of the DblType()

parse

public Double parse(String sourceValue)
             throws ParsingException

Parses a String to a Double. The String should already be trimmed.

Parsing is done via Double.parseDouble(String).

Parameters:

sourceValue - The source string, which should already be trimmed and may be null

Returns:

The parsed value, or null if null is passed.

Throws:

ParsingException - if unparsable.

cast

public Double cast(Object o)
            throws RuntimeException

Description copied from interface: ValueType

Attempt to cast the object to the generic type T, which is a concrete class in subclasses.

AndHow uses this internally to cast values known to already be of type T, but were stored in a generic way. If used for unknown types that are not castable to T, it will throw a RuntimeException, though this should never happen unless used by application code.

Parameters:

o - Object to cast

Returns:

A cast obeject

Throws:

RuntimeException