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https://issues.apache.org/struts/browse/WW-2513?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Maxx updated WW-2513:
---------------------
Description:
Unlike regular classes implementing interface java.util.Map, EnumMap are not
well supported through the (automatic?) "Type Conversion" as described here:
http://struts.apache.org/2.x/docs/type-conversion.html
1/ the values can't be retrieved through the use of some map-like OGNL
expressions like %{myEnumMap['myEnumValue']}
Neither by just removing the single quotes i.e. %{myEnumMap[myEnumValue]} or by
using the @...@ notation e.g. [EMAIL PROTECTED]@MyEnum.myEnumValue]} it still
doesn't work.
In the example below, the corresponding <s:textfield /> are not populated,
while the ones for the Map are.
2/ when setting values back to the object, an InstantiationException occurs.
Effectively, an EnumMap has NO no-arg constructor because initializing an Enum
needs to set a parameter: the enum type.
Note: IMHO looking for a declared no-arg constructor is wrong as Java
automatically declares a public no-arg constructor, but here it's not exactly
the problem (I'll come back later to this with another issue).
See attached files for a full running example:
- TestAction.java:
* 1 Map & 1 EnumMap are initialized with 2 entries (key+value) both
* the execute() method does the initialization, while the executeLog() does
the logging.
- TestAction-conversion.properties: the appropriate type conversion properties
file
- TestEnum.java: the Enum used as key universe for the EnumMap
- test.jsp: contains too iterators over the Map & the EnumMap
- struts.xml (but it's succinct)
Note: the conversion settings for the testMap seem not to be mandatory as
setting back the values into the action without them works fine.
was:
Unlike regular classes implementing interface java.util.Map, EnumMap are not
well supported through the (automatic?) "Type Conversion" as described here:
http://struts.apache.org/2.x/docs/type-conversion.html
1/ the values can't be retrieved through the use of some map-like OGNL
expressions like %{myEnumMap['myEnumValue']}
Neither by just removing the single quotes i.e. %{myEnumMap[myEnumValue]} or by
using the @...@ notation e.g. [EMAIL PROTECTED]@MyEnum.myEnumValue]} it still
doesn't work.
In the example below, the corresponding <s:textfield /> are not populated,
while the ones for the Map are.
2/ when setting values back to the object, an InstantiationException occurs.
Effectively, an EnumMap has NO no-arg constructor because initializing an Enum
needs to set a parameter: the enum type.
Note: IMHO looking for a declared no-arg constructor is wrong as Java
automatically declares a public no-arg constructor, but here it's not exactly
the problem (I'll come back later to this with another issue).
See attached files for a full running example:
- TestAction.java:
* 1 Map & 1 EnumMap are initialized with 2 entries (key+value) both
* the execute() method does the initialization, while the executeLog() does
the logging.
- TestAction-conversion.properties: the appropriate type conversion properties
file
- TestEnum.java: the Enum used as key universe for the EnumMap
- test.jsp: contains too iterators over the Map & the EnumMap
- struts.xml (but it's succinct)
Adding last note.
> EnumMap's not supported in type conversion + InstantiationException
> -------------------------------------------------------------------
>
> Key: WW-2513
> URL: https://issues.apache.org/struts/browse/WW-2513
> Project: Struts 2
> Issue Type: Bug
> Components: Plugin - Tags
> Affects Versions: 2.0.11
> Environment: Windows 2000 SP4
> WebLogic Server 9.2 M1
> JVM 5.0 (build 1.5.0_06-b05) - bundled with WLS installation
> Reporter: Maxx
> Attachments: struts.xml, test.jsp, TestAction-conversion.properties,
> TestAction.java, TestEnum.java
>
>
> Unlike regular classes implementing interface java.util.Map, EnumMap are not
> well supported through the (automatic?) "Type Conversion" as described here:
> http://struts.apache.org/2.x/docs/type-conversion.html
> 1/ the values can't be retrieved through the use of some map-like OGNL
> expressions like %{myEnumMap['myEnumValue']}
> Neither by just removing the single quotes i.e. %{myEnumMap[myEnumValue]} or
> by using the @...@ notation e.g. [EMAIL PROTECTED]@MyEnum.myEnumValue]} it
> still doesn't work.
> In the example below, the corresponding <s:textfield /> are not populated,
> while the ones for the Map are.
> 2/ when setting values back to the object, an InstantiationException occurs.
> Effectively, an EnumMap has NO no-arg constructor because initializing an
> Enum needs to set a parameter: the enum type.
> Note: IMHO looking for a declared no-arg constructor is wrong as Java
> automatically declares a public no-arg constructor, but here it's not exactly
> the problem (I'll come back later to this with another issue).
> See attached files for a full running example:
> - TestAction.java:
> * 1 Map & 1 EnumMap are initialized with 2 entries (key+value) both
> * the execute() method does the initialization, while the executeLog() does
> the logging.
> - TestAction-conversion.properties: the appropriate type conversion
> properties file
> - TestEnum.java: the Enum used as key universe for the EnumMap
> - test.jsp: contains too iterators over the Map & the EnumMap
> - struts.xml (but it's succinct)
> Note: the conversion settings for the testMap seem not to be mandatory as
> setting back the values into the action without them works fine.
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