org.trimou.engine.resolver

Class TransformResolver

java.lang.Object

org.trimou.engine.config.AbstractConfigurationAware

org.trimou.engine.resolver.AbstractResolver

org.trimou.engine.resolver.i18n.LocaleAwareResolver

org.trimou.engine.resolver.TransformResolver

All Implemented Interfaces:

ConfigurationAware, WithPriority, EnhancedResolver, Resolver, Transformer

Direct Known Subclasses:

DateTimeFormatResolver, DummyTransformResolver, NumberFormatResolver

public class TransformResolver
extends LocaleAwareResolver
implements Transformer

This resolver performs some kind of transformation when matched (e.g. formats the given context object based on the given name). The transformation is performed by a separate Transformer instance or by the resolver itself.

Author:

Martin Kouba

Nested Class Summary

Nested classes/interfaces inherited from interface org.trimou.engine.resolver.EnhancedResolver

EnhancedResolver.Hint

Field Summary

Fields inherited from class org.trimou.engine.config.AbstractConfigurationAware

configuration

Fields inherited from interface org.trimou.engine.resolver.Resolver

DEFAULT_PRIORITY

Constructor Summary

Constructors

Constructor and Description
TransformResolver(int priority, String... matchNames)
TransformResolver(int priority, Transformer transformer, String... matchingNames)

Method Summary

Modifier and Type	Method and Description
protected boolean	matches(Object contextObject, String name)
protected boolean	matches(String name)
protected String	matchingName(int index)
protected Object	performTransformation(Object contextObject, String name, ResolutionContext context)
Object	resolve(Object contextObject, String name, ResolutionContext context) Resolve the value from specified context object and name.
protected void	setMatchingNames(String... matchNames)
Object	transform(Object contextObject, String name, ResolutionContext context)

Methods inherited from class org.trimou.engine.resolver.i18n.LocaleAwareResolver

getCurrentLocale, init

Methods inherited from class org.trimou.engine.resolver.AbstractResolver

createHint, getPriority, toString

Methods inherited from class org.trimou.engine.config.AbstractConfigurationAware

checkNotInitialized, init

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.trimou.engine.config.ConfigurationAware

getConfigurationKeys, init

Constructor Detail

TransformResolver

public TransformResolver(int priority,
                         String... matchNames)

Parameters:

priority -

matchNames -

TransformResolver

public TransformResolver(int priority,
                         Transformer transformer,
                         String... matchingNames)

Parameters:

priority -

transformer -

matchingNames -

Method Detail

resolve

public Object resolve(Object contextObject,
                      String name,
                      ResolutionContext context)

Description copied from interface: Resolver

Resolve the value from specified context object and name. This method should return as fast as possible. The best practice is to verify params first and return null in case of the resolver is not capable of resolving it.

ResolutionContext allows to register a callback to release all the relevant resources after the resolved value is used.

Specified by:

resolve in interface Resolver

Parameters:

contextObject - The current context object (aka base object), may be null

name - The name (the key or its part) is never null

context - The current resolution context

Returns:

the resolved object or null

See Also:

Placeholder.NULL

transform

public Object transform(Object contextObject,
                        String name,
                        ResolutionContext context)

Specified by:

transform in interface Transformer

Returns:

the transformed object

matches

protected boolean matches(Object contextObject,
                          String name)

Parameters:

contextObject -

name -

Returns:

true in case of the resolver matches given context object and name, false otherwise

performTransformation

protected Object performTransformation(Object contextObject,
                                       String name,
                                       ResolutionContext context)

Parameters:

contextObject -

name -

context -

Returns:

the result of the transformation or null if the transformation was not successfull

matches

protected boolean matches(String name)

matchingName

protected String matchingName(int index)

setMatchingNames

protected void setMatchingNames(String... matchNames)