[ http://issues.apache.org/jira/browse/BEANUTILS-259?page=all ]
Niall Pemberton updated BEANUTILS-259:
--------------------------------------
Summary: Plugable Property Name Expression Resolver (was: Plugable
Expression Resolver)
Fix Version/s: 1.8.0
> Plugable Property Name Expression Resolver
> ------------------------------------------
>
> Key: BEANUTILS-259
> URL: http://issues.apache.org/jira/browse/BEANUTILS-259
> Project: Commons BeanUtils
> Issue Type: Improvement
> Components: Expression Syntax
> Affects Versions: 1.7.0
> Reporter: Niall Pemberton
> Assigned To: Niall Pemberton
> Priority: Minor
> Fix For: 1.8.0
>
> Attachments: BasicResolver.java, BasicResolverTestCase.java,
> Resolver.java
>
>
> There are a number of outstanding bugs against the BeanUtils expression
> syntax with people wanting BeanUtils to support different variations. There
> is also a duplication of the "expression evaluation" code in various methods
> which can't be tested in isolation and is difficult to maintain as changes
> have to be applied uniformly to various places.
> The main places where the code is duplicated:
> PropertyUtilsBean
> - getNestedProperty
> - setNestedProperty
> - getPropertyDescriptor
> BeanUtilsBean
> - copyProperty
> - setProperty
> LocaleBeanUtils has also implemented an alternative mechanism - using a
> Descriptor object to resolve references. BeanUtils and PropertyUtils also
> work in slightly different ways. There are also other methods (e.g.
> PropertyUtilsBean's getIndexedProperty() method) which also have related code.
> I propose to add a new "expression resolver" interface, which would be a
> singleton and everywhere would delegate to to resolve property expressions.
> This will allow easy testing as it can be tested in isolation and provide a
> uniform mechanism accross BeanUtils. It will also allow alternative syntax to
> be implemented if the resolver implementation can be configured.
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