Introducing Spring Framework

Chapter 5 ■ Working with Collections and Custom Types
In the mydocuments-context.xml file (see Listing 5-4) you modified the documentDAO bean to reflect the new
list and also you modified the typeDAO bean so now it can accept a Map with some entries, but wait! I think I need to
explain how the Spring Framework works with collections, right?
The Spring Framework allows you to use Java Collections right out the box, with the (java.util.List
type), (java.util.Map type), (java.util.Properties type) and (java.util.Set type) tags
shown in Table 5-1.
Table 5-1. Collections Tags
Element
Description
This tag allows duplicates. The tags , , and are the possible
children of the tag.
This tag doesn’t accept duplicates. The tags , , and are the
possible children of the tag.
This tag is a name-value pair. Both values are Strings. and are the children tags. This is a reference to the java.util.Properties class.
This tag is a name-value pair; both values can be any type. ,
, , and are the possible children of the
tag. This is a reference of the java.util.Map class.
So if you want to apply the to your documentDAO bean and to your typeDAO bean, first you need
to modify your DocumentRepository and the TypeDataRepository classes to reflect the new type java.util.Set and
java.util.Properties, respectively. Let’s review Listing 5-5, your XML configuration.
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