Is there any Map like
MAP < String, FunctionMethod >
library in Java? No, there isn't. Then any external or open source library available?
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Java has some classes for maps, but that's not what you're looking for !?Andreas Dolk– Andreas Dolk2011-09-21 04:29:55 +00:00Commented Sep 21, 2011 at 4:29
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Your question is very confusing to me. What do you mean specifically by MAP library?Hovercraft Full Of Eels– Hovercraft Full Of Eels2011-09-21 04:31:12 +00:00Commented Sep 21, 2011 at 4:31
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geotools.org you can always use google maps with java .Shahzeb– Shahzeb2011-09-21 04:33:45 +00:00Commented Sep 21, 2011 at 4:33
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1@Hovercraft Full Of Eels I'm sorry. I wrote < String, FunctionMethod > without the space and the text processor took it as a tag :DDewsworld– Dewsworld2011-09-21 04:34:26 +00:00Commented Sep 21, 2011 at 4:34
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Are you referring to a function pointer as the value in your map?Gary– Gary2011-09-21 04:35:25 +00:00Commented Sep 21, 2011 at 4:35
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3 Answers
Java does not support function pointers. A workaround is using reflection and a Map
Map<String, java.lang.reflect.Method>
and invoke mapped method.
Comments
Another work around is to map a String to an Interface a la the command pattern
Map<String, MyInterface>
answered Sep 21, 2011 at 4:38
Hovercraft Full Of Eels
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I am curious if you are looking for something like guava's MapMaker's makeComputingMap. It takes a (com.google.common.base.)Function that computes the value. I use it in web apps to implement lazy, cached key-value pairs. What do you mean by "FunctionMethod"?
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Dewsworld
Function/Method, actually. I just need to invoke a method with a given string KEY