Date: 2004-09-19T06:31:44
Editor: MichaelMcGrady <[EMAIL PROTECTED]>
Wiki: Apache Struts Wiki
Page: StrutsCatalogDispatchUtil
URL: http://wiki.apache.org/struts/StrutsCatalogDispatchUtil
no comment
Change Log:
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@@ -5,6 +5,61 @@
This is a solution for Struts. If you want a solution independent of Struts, again,
please see StrutsCatalogImageTagUtil. The principle reason for this class is the
problem with <input type='image' name='whatever'> tags in HTML. Those tag send the
values in the name attribute as ''whatever.x=9'' and ''whatever.y=26''.
DispatchAction and its progeny provide a melange of solutions but no common way to
deal with ''<a href='whatever.do'>'', ''<input type='submit'>'', ''<input
type='image'>'', ''<input type='file'>'', or whatever. This class, DispatchUtil does
that. If you prefer to use a subclass, just provide the functionality in this class
in a class extending Action. Herbert Rabago came up with the idea of providing the
functionality in a utility class and I really like that idea. So, here we go.
+== Uses ==
+
+'''N.B. the uses of "dispatch".''' If you do not like using "dispatch", then you can
rewrite the code in the getMethodName(...) method. Essentially, you will need to
replace ".dispatch" with something else in the tag names which you can identify in the
enumeration. You have to use a suffix with this logic. But, if you want a prefix,
e.g. "dispatch.update" or "method.update", then you will have to change the logic too.
Suffix logic seems to best fit the existing methods in String. Otherwise, I would
have used a prefix. You may want to anyway.
+
+=== Multiple Images ===
+
+Multiple image tags are the primary reason for this class. Integrating this into a
common solution is the difficulty.
+{{{
+<input type='image' name='update.dispatch' src='update.gif'>
+<input type='image' name='delete.dispatch' src='delete.gif'>
+}}}
+=== Links ===
+{{{
+<a href='profile.do?update.dispatch=whatever'>
+<a href='profile.do?delete.dispatch=whatever'>
+}}}
+=== Submits ===
+{{{
+<input type='submit' name='update.dispatch' value='whatever'>
+<input type='submit' name='delete.dispatch' value='whatever'>
+}}}
+=== File Browse ===
+{{{
+<input type='file' name='update.dispatch'>
+<input type='file' name='delete.dispatch'>
+}}}
+=== Button ==
+{{{
+<input type='button' name='update.dispatch' value='whatever'>
+<input type='button' name='delete.dispatch' value='whatever'>
+}}}
+=== struts-config.xml ===
+
+If you like to do things the way they are done with DispatchActions and use Struts
xml for commands, then the following are possibilities. '''Please note that you never
have to do this. Struts xml configuration is wholly voluntary for this solution.'''
+
+==== MappingDispatchAction ===
+{{{<action path="/updateProfile"
+ type="org.example.ProfileAction"
+ parameter="update.dispatch"
+ name="profileForm"
+ validate="true"
+ input="/editProfile.jsp"
+ scope="request">
+ <forward name="success" path="/updatedProfile.jsp"/>
+ </action>
+
+ <action path="/deleteSubscription"
+ type="org.example.ProfileAction"
+ name="profileForm"
+ scope="request"
+ input="/subscription.jsp"
+ parameter="delete.dispatch">
+ <forward name="success" path="/deletedSubscription.jsp"/>
+ </action>
+}}}
== Code ==
{{{
package com.crackwillow.struts.util.dispatch;
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