com.google.gdata.wireformats

Class ObjectConverter<T>

java.lang.Object

com.google.gdata.wireformats.ObjectConverter<T>

Type Parameters:

T - data type handled by this converter

Direct Known Subclasses:

ObjectConverter.MappedEnumConverter

public abstract class ObjectConverter<T>
extends java.lang.Object

Converts values from strings to typed values (objects).

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ObjectConverter.MappedEnumConverter<T> Object converter for pseudo-enum types backed by a map.

Constructor Summary

Constructors

Constructor and Description
ObjectConverter()

Method Summary

Methods

Modifier and Type	Method and Description
static <V> void	addConverter(java.lang.Class<V> type, ObjectConverter<V> converter) Add converter for a data type.
abstract T	convertValue(java.lang.String value, java.lang.Class<? extends T> datatype) Translate an untyped (string) value to a typed value.
static <V> V	getValue(java.lang.Object value, java.lang.Class<V> datatype) Converts an object to the given datatype by casting if possible, and if not by narrowing from String using the registered object converters.
static <V> V	getValue(java.lang.String value, java.lang.Class<V> datatype) Translate an untyped (string) value to a typed value.

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectConverter

public ObjectConverter()

Method Detail

addConverter

public static <V> void addConverter(java.lang.Class<V> type,
                    ObjectConverter<V> converter)

Add converter for a data type.

Parameters:

type - data type

converter - converter

getValue

public static <V> V getValue(java.lang.Object value,
             java.lang.Class<V> datatype)
                  throws ParseException

Converts an object to the given datatype by casting if possible, and if not by narrowing from String using the registered object converters.

Type Parameters:

V - the type of value to return.

Parameters:

value - the value to convert.

datatype - the datatype to convert to.

Returns:

the original value if it could be cast to the required type, or a narrowed version of the value if narrowing was possible.

Throws:

ParseException - if narrowing was not possible.

getValue

public static <V> V getValue(java.lang.String value,
             java.lang.Class<V> datatype)
                  throws ParseException

Translate an untyped (string) value to a typed value.

Type Parameters:

V - data type

Parameters:

value - value

datatype - class of value type

Returns:

typed value

Throws:

ParseException - if value cannot be parsed according to type

convertValue

public abstract T convertValue(java.lang.String value,
             java.lang.Class<? extends T> datatype)
                        throws ParseException

Translate an untyped (string) value to a typed value.

Parameters:

value - value to convert.

Returns:

value converted to type T.

Throws:

ParseException - if value cannot be parsed according to type