com.sas.util.transforms
Class Transforms

com.sas.util.transforms.Transforms

public class Transforms

The Transforms class manages the list of registered transforms used by the property linking mechanism of the com.sas.LinkPropertiesInterface and com.sas.PropertyLinkAdaptor.

Field Summary

protected static boolean	defaultTransformsRegistered This flag is used by all public methods of this class to determine if the default transforms have already be registered.
protected static java.util.Hashtable	inputClasses inputClasses is a Hashtable which maintains a hash of Class objects to HashTables.

Constructor Summary

Transforms()

Method Summary

static java.util.Enumeration	getRegisteredSourceClasses() Gets all the source classes the have a transform registered to that type.
static java.util.Enumeration	getRegisteredSourceClassesForTransform(com.sas.util.transforms.TransformInterface transform) Gets all the source classes that the specifed transform is registered to.
static java.util.Hashtable	getRegisteredSourceTransforms(java.lang.Class inputClass) Get the registered transforms that have the specified type as source objects.
static java.util.Hashtable	getRegisteredTargetTransforms(java.lang.Class targetClass) Get the registered transforms that have the specified type as target objects.
static com.sas.util.transforms.TransformInterface[]	getRegisteredTransforms() Returns an array of unique registered transform objects.
static boolean	isTransformable(java.lang.Class inputClass, java.lang.Class outputClass) Check for a transformation from inputClass to outputClass from the pool of registered transformations.
static boolean	isTransformable(java.lang.Object source, java.lang.String sourceProperty, java.lang.Object target, java.lang.String targetProperty) Returns whether or not the specified source property can be transformed to the type of the specified target property.
static com.sas.util.transforms.TransformInterface	lookupTransform(java.lang.Class inputClass, java.lang.Class outputClass) Finds a transformation from inputClass to outputClass from the pool of registered transformations.
static void	registerDefaultTransforms() registerDefaultTransforms registers a set of default transforms so that there is a base set of transforms to use in linking properties.
static void	registerTransform(java.lang.Class inputClass, java.lang.Class outputClass, com.sas.util.transforms.TransformInterface converterClass) Registers a transformation (converterClass) from inputClass to outputClass.
protected static void	registerTransformsForClasses(java.lang.Class[][] sourceClassLists, java.lang.Class destClass, com.sas.util.transforms.TransformInterface transform) This is a helper method used to register transforms between the various Number subclasses.
static void	unregisterTransform(java.lang.Class inputClass, java.lang.Class outputClass, com.sas.util.transforms.TransformInterface converterClass) Unregisters a transformation (converterClass) from inputClass to outputClass.

Field Detail

defaultTransformsRegistered

protected static boolean defaultTransformsRegistered

This flag is used by all public methods of this class to determine if the default transforms have already be registered. This allow lazy registration of the default transforms so that applications which do not use property linking will not have to pay the price for registering the transforms.

inputClasses

protected static java.util.Hashtable inputClasses

inputClasses is a Hashtable which maintains a hash of Class objects to HashTables. These inner Hashtables contain a hash of Class objects to objects which implement the TransformInterface.

See Also:

registerTransform(java.lang.Class, java.lang.Class, com.sas.util.transforms.TransformInterface), unregisterTransform(java.lang.Class, java.lang.Class, com.sas.util.transforms.TransformInterface), lookupTransform(java.lang.Class, java.lang.Class)

Constructor Detail

Transforms

public Transforms()

Method Detail

registerDefaultTransforms

public static void registerDefaultTransforms()

registerDefaultTransforms registers a set of default transforms so that there is a base set of transforms to use in linking properties.

registerTransformsForClasses

protected static void registerTransformsForClasses(java.lang.Class[][] sourceClassLists,
                                                   java.lang.Class destClass,
                                                   com.sas.util.transforms.TransformInterface transform)

This is a helper method used to register transforms between the various Number subclasses.

registerTransform

public static void registerTransform(java.lang.Class inputClass,
                                     java.lang.Class outputClass,
                                     com.sas.util.transforms.TransformInterface converterClass)

Registers a transformation (converterClass) from inputClass to outputClass.

See Also:

unregisterTransform(java.lang.Class, java.lang.Class, com.sas.util.transforms.TransformInterface), lookupTransform(java.lang.Class, java.lang.Class)

unregisterTransform

public static void unregisterTransform(java.lang.Class inputClass,
                                       java.lang.Class outputClass,
                                       com.sas.util.transforms.TransformInterface converterClass)

Unregisters a transformation (converterClass) from inputClass to outputClass.

See Also:

registerTransform(java.lang.Class, java.lang.Class, com.sas.util.transforms.TransformInterface), lookupTransform(java.lang.Class, java.lang.Class)

isTransformable

public static boolean isTransformable(java.lang.Class inputClass,
                                      java.lang.Class outputClass)

Check for a transformation from inputClass to outputClass from the pool of registered transformations.

See Also:

lookupTransform(java.lang.Class, java.lang.Class), registerTransform(java.lang.Class, java.lang.Class, com.sas.util.transforms.TransformInterface), unregisterTransform(java.lang.Class, java.lang.Class, com.sas.util.transforms.TransformInterface)

lookupTransform

public static com.sas.util.transforms.TransformInterface lookupTransform(java.lang.Class inputClass,
                                                                         java.lang.Class outputClass)

Finds a transformation from inputClass to outputClass from the pool of registered transformations.

See Also:

registerTransform(java.lang.Class, java.lang.Class, com.sas.util.transforms.TransformInterface), unregisterTransform(java.lang.Class, java.lang.Class, com.sas.util.transforms.TransformInterface)

getRegisteredTransforms

public static com.sas.util.transforms.TransformInterface[] getRegisteredTransforms()

Returns an array of unique registered transform objects.

Returns:

an array of unique registered transform objects.

getRegisteredSourceTransforms

public static java.util.Hashtable getRegisteredSourceTransforms(java.lang.Class inputClass)

Get the registered transforms that have the specified type as source objects.

getRegisteredTargetTransforms

public static java.util.Hashtable getRegisteredTargetTransforms(java.lang.Class targetClass)

Get the registered transforms that have the specified type as target objects.

getRegisteredSourceClasses

public static java.util.Enumeration getRegisteredSourceClasses()

Gets all the source classes the have a transform registered to that type.

getRegisteredSourceClassesForTransform

public static java.util.Enumeration getRegisteredSourceClassesForTransform(com.sas.util.transforms.TransformInterface transform)

Gets all the source classes that the specifed transform is registered to.

isTransformable

public static boolean isTransformable(java.lang.Object source,
                                      java.lang.String sourceProperty,
                                      java.lang.Object target,
                                      java.lang.String targetProperty)

Returns whether or not the specified source property can be transformed to the type of the specified target property.

This is used by the IDE.

See Also:

registerTransform(java.lang.Class, java.lang.Class, com.sas.util.transforms.TransformInterface), unregisterTransform(java.lang.Class, java.lang.Class, com.sas.util.transforms.TransformInterface), lookupTransform(java.lang.Class, java.lang.Class)