Class ResourceConverter
The supportsType method defines what types a ResourceConverter supports. By default it returns true for classes that are equal to the constructor's type argument. The parseType methods converts a string the ResourceConverter's supported type, and the toString does the inverse, it converts a supported type to a String. Concrete ResourceConverter subclasses must override parseType() and, in most cases, the toString method as well.
This class maintains a registry of ResourceConverters. The forType method returns the first ResourceConverter that supports a particular type, new ResourceConverters can be added with register(). A small set of generic ResourceConverters are registered by default. They support the following types:
- Boolean
- Integer
- Float
- Double
- Long
- Short
- Byte
- MessageFormat
- URL
- URI
The Boolean ResourceConverter returns true for "true", "on", "yes", false otherwise. The other primitive type ResourceConverters rely on the corresponding static parseType method, e.g. Integer.parseInt(). The MessageFormat ResourceConverter just creates MessageFormat object with the string as its constructor argument. The URL/URI converters just apply the corresponding constructor to the resource string.
- Author:
- Hans Muller (Hans.Muller@Sun.COM)
- See Also:
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Nested Class Summary
Nested Classes -
Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionstatic ResourceConverter
ReturnsResourceConverter
for the specified typeabstract Object
parseString
(String s, ResourceMap r) Convert string to objectstatic void
register
(ResourceConverter resourceConverter) Registers aResourceConverter
boolean
supportsType
(Class testType) Checks whethertestType
can be converted with this converter.Null safe toString operation.
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Field Details
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type
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Constructor Details
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ResourceConverter
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Method Details
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parseString
public abstract Object parseString(String s, ResourceMap r) throws ResourceConverter.ResourceConverterException Convert string to object- Parameters:
s
- the string to be parsedr
- theResourceMap
- Returns:
- the object which was created from the string
- Throws:
ResourceConverter.ResourceConverterException
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toString
Null safe toString operation.- Parameters:
obj
- the object to be converted to String- Returns:
- result of obj.toString or "null"
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supportsType
Checks whethertestType
can be converted with this converter.- Parameters:
testType
-- Returns:
true
iftestType
can be converted with this converter.
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register
Registers aResourceConverter
- Parameters:
resourceConverter
- the resource converter to be registered
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forType
ReturnsResourceConverter
for the specified type- Parameters:
type
- the type converter must be found for- Returns:
- the converter for specified type or
null
if no converter is found for thetype
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