[ http://issues.apache.org/jira/browse/BEANUTILS-188?page=all ]
Niall Pemberton updated BEANUTILS-188:
--------------------------------------
Bugzilla Id: (was: 33352)
Component/s: Bean / Property Utils
> [beanutils] add collection modifiers feature to PropertyUtilsBean
> -----------------------------------------------------------------
>
> Key: BEANUTILS-188
> URL: http://issues.apache.org/jira/browse/BEANUTILS-188
> Project: Commons BeanUtils
> Issue Type: Improvement
> Components: Bean / Property Utils
> Environment: Operating System: All
> Platform: All
> Reporter: Marc DeXeT
> Priority: Minor
>
> There's some java beans who are not lazy ones and who need to modify
> collection
> type properties. Ongoing propertyUtilsBean only allows to set indexed
> property,
> but not to add or remove items in collection.
> This is a proposition to add following new features :
> - propertyUtilsBean.(add | remove )CollectionPropertyValue(Object bean, String
> name, Object value)
> Action: (add to | remove from ) bean property name a value.
> In other words, search a method (add | remove)item(parameterType value) where
> parameterType.isAssignable(value.class) to add value to item collection, item
> collection bean property being deduced with a stemmer algo (as in
> betwixt.DefaultPluralStemmer) from method name and declared by
> getProperty(bean,name).getClass();
> Sample :
> myPropertyUtilsBean.addCollectionPropertyValue(myBean,
> "productMap("food").catalog.products", new Product("acmeDogFood", 12));
> will use Catalog.addProduct(Product p) to add new Product("acmeDogFood", 12)
> to
> inner collection Catalog.products.
> - PropertyUtilsBean.(add | remove )CollectionPropertyValue(Object bean, String
> property, String itemName, Object value)
> Action: (add to | remove from ) bean property name a value.
> In other words, search a method (add | remove)item(parameterType value) where
> parameterType.isAssignable(value.class) to add value to item collection, item
> collection being deduced with a stemmer algo (as in
> betwixt.DefaultPluralStemmer) from itemName and declared by
> getProperty(bean,name).getClass();
> Sample :
> myPropertyUtilsBean.addCollectionPropertyValue(myBean,
> "productMap("food").catalog","product", new Product("acmeDogFood", 12));
> will use Catalog.addProduct(Product p) to add new Product("acmeDogFood", 12)
> to
> inner Catalog.productList.
> If there's no Catalog.addProduct(Product p) method, try to invoke
> Collection.add(Object obj) on Catalog.products.
> I have yet created in PropertyUtilsBean sub class such feature as demonstrator
> and unit tests work (for the meantime).
> Constraints:
> - Object are to apply java beans specification.
> - Collection must have readable method ( to be considered as bean property)
> - adder and remover method have to follow conventions copied from
> org.apache.commons.betwixt.strategy.DefaultPluralStemmer
> Matching select in this order for an given itemName or a deduced from method
> name one:
> 1. get itemName+"s" :("items")
> 2. if ( itemName ends with "y" )
> 1. get itemName+"es" (no sample, my english is too poor !)
> 2. get substitute itemName ending with "ies" ("baby" => "babies")
> 3. get itemName + "List"
> 4. get itemName + "Set"
> 5. get itemName + "Collection
> 6. Browse propertyMap to get a property starting with itemName, as
> "itemBag".
> If there's several property matching later, select the longuest property
> name : "itemBagCollection" instead of "itemBag"
>
> - method selection :
> If two methods match this upper requirements (name (add | remove)Item(ParmType
> value) and parameterType.isAssignable(value.class)) , first method matching is
> selected. Methods are ordered following min "distance" metric :
> - "Distance" metric is the base on
> public int getDistance(Class c) {
> Class superclass = c.getSuperclass();
> int distance = 0;
> while ( superclass != null ) {
> superclass = superclass.getSuperclass();
> distance ++;
> }
> return distance;
> }
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