Package gnu.jel

Class OPcall

  • public class OPcall
extends OP
    A tree node, representing a method call (field/local variable load).

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected static int[] arrayStoreCodes  
      protected static byte[] arrayTypeCodes  
      java.lang.reflect.Member m
      Holds method to be executed
      int nplv
      local variable number (in case m=null), number of formal parameters of the method to call otherwise.

    • Constructor Summary

      Constructors 
      Constructor Description
      OPcall​(int lvarn, java.lang.Class<?> type)
      Prepares access to the local variable (formal parameter) of method.
      OPcall​(java.lang.reflect.Member m, int np, java.util.Stack<OP> paramOPs, boolean aEval)
      Prepares a new method/field call/get operation to be added to the code.

    • Field Detail

      • m

        public java.lang.reflect.Member m
        Holds method to be executed

      • nplv

        public int nplv
        local variable number (in case m=null), number of formal parameters of the method to call otherwise.

      • arrayTypeCodes

        protected static final byte[] arrayTypeCodes

      • arrayStoreCodes

        protected static final int[] arrayStoreCodes

    • Constructor Detail

      • OPcall

        public OPcall​(java.lang.reflect.Member m,
              int np,
              java.util.Stack<OP> paramOPs,
              boolean aEval)
       throws CompilationException
        Prepares a new method/field call/get operation to be added to the code.
        Parameters:
        m - method/field to call/get.
        np - number of actual formal parameters (not considering "this")
        paramOPs - stack holding the operands
        aEval - indicates if the method call should be attempted at the compile time
        Throws:
        CompilationException

      • OPcall

        public OPcall​(int lvarn,
              java.lang.Class<?> type)
        Prepares access to the local variable (formal parameter) of method.
        Parameters:
        lvarn - local variable number.
        type - local variable type.

    • Method Detail

      • eval

        public java.lang.Object eval()
                      throws java.lang.Exception
        Attempts to evaluate this function.
        Specified by:
        eval in class OP
        Returns:
        the OPload, representing the function's result (if it can \ be evaluated).
        Throws:
        java.lang.Exception - if the function can't be evaluated, or the evaluation results in error.

      • compile

        public void compile​(ClassFile cf)
        Description copied from class: OP
        Called to generate the code implementing this OP.
        Specified by:
        compile in class OP
        Parameters:
        cf - class file with a new open method to write the code into.