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From Nikolay Totomanov <>
Subject Re: Always add no-args constructor at compile time
Date Mon, 27 Jul 2015 06:52:08 GMT

Looks promising. Thank you for the heads up

 >-------- Оригинално писмо --------

 >От: Keegan Witt

 >Относно: Re: Always add no-args constructor at compile time


 >Изпратено на: 24.07.2015 02:29

   FYI: I opened 
which, if agreed to, will make your config script a lot simpler.



     On Fri, Jul 17, 2015 at 4:49 PM, Keegan Witt >  wrote:

 Glad I could help.


          On Fri, Jul 17, 2015 at 12:48 PM, Nikolay Totomanov 
   >  wrote:

             Thanks a lot,
It works like a charm!



 >-------- Оригинално писмо -------- 
 >От: Nikolay Totomanov 

              >Относно: Re: Always add no-args constructor at compile time 
  >Изпратено на: 15.07.2015 01:57 

                The code looks very clean to me! 
               Thanks a lot,
                I'll give it a try. 
 >-------- Оригинално писмо -------- 
 >От: Keegan Witt 
 >Относно: Re: Always add no-args constructor at compile time 
 >Изпратено на: 14.07.2015 06:04 
                  Oh, actually Opcodes is not needed, you can take that off so you don't need
a dependency on 
                  org.ow2.asm:asm . 
                   On Mon, Jul 13, 2015 at 10:53 PM, Keegan Witt 
           >  wrote: 
                      Here's what I'm thinking.
 Use this as a configuration script. 
                       import  java.lang.annotation.ElementType
 import   java.lang.annotation.Retention
  import  java.lang.annotation.RetentionPolicy
 import   java.lang.annotation.Target
  import  org.codehaus.groovy.ast.ASTNode
 import  org.codehaus.groovy.ast.AnnotatedNode
 import  org.codehaus.groovy.ast.ClassNode
 import  org.codehaus.groovy.ast.ConstructorNode
 import  org.codehaus.groovy.ast.Parameter
 import  org.codehaus.groovy.ast.stmt.BlockStatement
 import  org.codehaus.groovy.control.CompilePhase
 import  org.codehaus.groovy.control.SourceUnit
 import  org.codehaus.groovy.transform.AbstractASTTransformation
 import   org.codehaus.groovy.transform.GroovyASTTransformation
  import   org.codehaus.groovy.transform.GroovyASTTransformationClass
  import  org.objectweb.asm.Opcodes

 @GroovyASTTransformation (phase = CompilePhase.CANONICALIZATION)
 public class  DefaultConstructorASTTransformation  extends  AbstractASTTransformation  implements
 Opcodes {
     public void  visit(ASTNode[] nodes, SourceUnit source) {
        init(nodes, source)
        AnnotatedNode parent = (AnnotatedNode) nodes[ 1 ]

         if  (parent  instanceof  ClassNode) {
            ClassNode cNode = (ClassNode) parent
             if  (!cNode.getDeclaredConstructor( new  Parameter[ 0 ])) {
                 final  BlockStatement body =  new  BlockStatement()
                cNode.addConstructor( new  ConstructorNode(ACC_PUBLIC,  new  Parameter[ 0
], cNode.EMPTY_ARRAY, body))
 @Retention (RetentionPolicy.RUNTIME)
 @Target (ElementType.TYPE)
 @GroovyASTTransformationClass ( "DefaultConstructorASTTransformation" )
 public  @ interface   DefaultConstructor  {}

withConfig(configuration) {
                      Seemed to work in my tests, but everybody should feel free to point
out anything I goofed up. 
                        On Mon, Jul 13, 2015 at 6:24 PM, Keegan Witt 
                >  wrote: 
                           Sorry, I should have given you the example in the configuration
script syntax 
                           withConfig(configuration) {
    ast(groovy.transform.TupleConstructor,  includes :[ '' ])
                           But it doesn't matter, because the transformation removes existing
constructors from the class.
 Sorry, I got ahead of myself. 
                             On Mon, Jul 13, 2015 at 5:45 PM, Keegan Witt 
                     >  wrote: 
                                  One way that comes to mind offhand would be 

 @groovy.transform.TupleConstructor(includeFields=false, includeProperties=false, includeSuperFields=false,

                                 Anybody know why 

                                doesn't work? 

                                  On Mon, Jul 13, 2015 at 5:34 PM, Nikolay Totomanov 
                          >  wrote: 
                                     I need to always add the default constructor to my classes.

                                     Is it possible to achieve that using CompilerConfiguration




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