Groovy example source code file (DirectMethodCallTest.groovy)

This example Groovy source code file (DirectMethodCallTest.groovy) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Groovy tags/keywords

abstractbytecodetestcase, directmethodcalltest, directmethodcalltest, invokevirtual, invokevirtual, ljava/lang/string, ljava/lang/string, parameter, parameter, util

The Groovy DirectMethodCallTest.groovy source code

package org.codehaus.groovy.classgen.asm

import java.util.List;

import org.codehaus.groovy.ast.ClassHelper;
import org.codehaus.groovy.ast.ClassNode;
import org.codehaus.groovy.ast.Parameter;
import org.codehaus.groovy.ast.expr.MethodCallExpression;
import org.codehaus.groovy.ast.stmt.BlockStatement;
import org.codehaus.groovy.ast.stmt.ExpressionStatement;
import org.codehaus.groovy.ast.stmt.Statement;

/**
 * @author Jochen Theodorou
 */
class DirectMethodCallTest extends AbstractBytecodeTestCase {
    
  void testVirtual() {
      def target = ClassHelper.Integer_TYPE.getMethod("toString", new Parameter[0])
      def makeDirectCall = {su ->
          su. getAST().classes[0].
              getMethod("run", new Parameter[0]).code.
              statements.last().expression.methodTarget = target;
      }
      
      assert compile (method:"run", conversionAction: makeDirectCall, """
          def a = 1; 
          a.toString()
      """).hasSequence([
              "INVOKEVIRTUAL java/lang/Integer.toString ()Ljava/lang/String;"
      ])
  }
}