Implement interface with clojure

[Rajith Gamage]

Hi,
How can do this in clojure ?

table.addGeneratedColumn("Last Name",new Table.ColumnGenerator(){


            public Component generateCell(Table source, Object itemId, Object columnId) {
                
            }
        });

table is an instance of Table . addGeneratedColumn is an method of Table class.
ColumnGenerator is a static interface in Table class and it has a abstract method called generateCell.

How can convert the above code into clojure ?

[Amit Rathore]

Instead of attempting to write code here, check this page: Java Interop. Specifically look under "Implementing Interfaces and Extending Classes" and the proxy macro.

[Sean Corfield]

To following on from Amit's pointer, Clojure has really good Java interop but exactly how you approach a problem depends on exactly what you need to do. For example, you can create an implementation of a Java interface on the fly with reify, you can wrap and extend Java objects with proxy and you can also generate regular .class files with gen-class and its buddies.

You're example is similar to the sort of thing shown in the Clojure community docs for proxy: mouse listener.

I recently blogged about generating .class files to write a log4j appender in Clojure which shows a very different approach.

[Rajith Gamage]

Amit Rathore wrote:Instead of attempting to write code here, check this page: Java Interop. Specifically look under "Implementing Interfaces and Extending Classes" and the proxy macro.

thanks for the reply . Found a way to solve it.

[Rajith Gamage]

Sean Corfield wrote:To following on from Amit's pointer, Clojure has really good Java interop but exactly how you approach a problem depends on exactly what you need to do. For example, you can create an implementation of a Java interface on the fly with reify, you can wrap and extend Java objects with proxy and you can also generate regular .class files with gen-class and its buddies.

You're example is similar to the sort of thing shown in the Clojure community docs for proxy: mouse listener.

I recently blogged about generating .class files to write a log4j appender in Clojure which shows a very different approach.

thanks for the reply. Had to use $ sign instead of other things.

[Sean Corfield]

Rajith Gamage wrote:Had to use $ sign instead of other things.

In Java, when nested classes are compiled they are named like Outer$Inner so if you're referring to nested classes from other languages on the JVM, you often have to use the Outer$Inner form of the name.