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Spring Framework : Populating a Map<Enum,Object> with util:map

Answer 1

A:

I think this is what you need. Note i don't think you need to specify the key-type and value-type attributes. Spring should be able to work that out.

<bean id="genericEntityFactory" class="com.xx.xx.common.index.GenericEntityFactoryImpl">
  <property name="indexEntityMap" ref="indexEntityMapBean"/>
</bean>

<util:map id="indexEntityMapBean" 
       map-class="java.util.HashMap" 
       key-type="com.xx.xx.common.index.IndexType" 
       value-type="com.xx.xx.common.index.GenericEntityFactoryImpl">
           <entry key="com.xx.xx.common.index.IndexType.CELL">
                <ref bean="cell"/>
           </entry>
</util:map>

The only reason you would use <util:map instead of the cleaner annonomous <map>(see section 3.3.3.3) is if you wanted to wire the same map into multiple places or you wanted to use a different underlying map implementation eg ConcurrentHashMap.

mR_fr0g 2010-09-02 14:45:22

(-1) This doesn't work. Spring cannot figure out how to convert the key to an enum. In my case I get: Error creating bean with name 'la': Error converting typed String value for bean property 'sourceMap'; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert value of type 'java.lang.String' to required type 'com.t.LayoutHolder$LA'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [com.t.LayoutHolder$LA]: no matching editors or conversion strategy found

harschware 2010-10-05 17:08:54

Answer 2

+1 A:

I found a workaround by defining each enum is plan to add to the map as a separate bean - thanks to creating-spring-bean-from-java-5-enum

<bean id="CELL" class="com.xx.xx.common.index.IndexType" factory-method="valueOf">
    <constructor-arg>
        <value>CELL</value>
    </constructor-arg>
</bean>

<bean id="APN" class="com.xx.xx.common.index.IndexType" factory-method="valueOf">
    <constructor-arg>
        <value>APN</value>
    </constructor-arg>
</bean>

Having defined the enums I can them key-ref them in the map

<bean id="genericEntityFactory" class="com.xx.xx.common.index.GenericEntityFactoryImpl" >
    <property name="indexEntityMap">
        <map>
            <entry key-ref="CELL"><ref bean="cell"/></entry>
            <entry key-ref="APN"><ref bean="apn"/></entry>
        </map>   
    </property>
</bean>

emeraldjava 2010-09-02 16:29:18

Answer 3

A:

Here's an alternate and shorter format:

<bean id="versionService" class="my.service.VersionService" 
        p:animalDAOMap-ref="animalDAOMap"/>

<util:map id="p:animalDAOMap">
    <entry key="chicken" value-ref="chickenDAO"/>
    <entry key="monkey" value-ref="monkeyDAO"/>
    <entry key="pig" value-ref="pigDAO"/>
</util:map>

Make sure to include the namespace

xmlns:util="http://www.springframework.org/schema/util"

And the schema

http://www.springframework.org/schema/util 
http://www.springframework.org/schema/util/spring-util-3.0.xsd

By the way I'm using Spring 3.0+ here

chris 2010-10-16 03:09:30

but where is your enum?

emeraldjava 2010-10-16 11:37:02

Answer 4

A:

Refer to my post in here.

Cristian Ebbens 2010-10-22 19:28:42

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Spring Framework : Populating a Map<Enum,Object> with util:map

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