Examples of org.apache.derby.iapi.services.compiler.MethodBuilder.callMethod()

Package org.apache.derby.iapi.services.compiler

Class org.apache.derby.iapi.services.compiler.MethodBuilder

Examples of org.apache.derby.iapi.services.compiler.MethodBuilder.callMethod()

org.apache.derby.iapi.services.compiler.MethodBuilder.callMethod()
Call a method. The instance (receiver or reference) for non-static methods must be pushed by the caller. The instance (for non-static) and the arguments are popped of the stack, and the return value (if any) is pushed onto the stack.
The type needs to be one of:
- VMOpcode.INVOKESTATIC - call a static method
- VMOpcode.INVOKEVIRTUAL - call method declared in the class or super-class.
- VMOpcode.INVOKEINTERFACE - call a method declared in an interface
```
 static methods Stack ...,value* => [numArgs number of values will be popped] ...,return_value [void methods will not push a value] non-static methods Stack ...,ref,value* => [numArgs number of values will be popped] ...,return_value [void methods will not push a value] 
```
The type of the arguments to the methods must exactly match the declared types of the parameters to the methods. If a argument is of the incorrect type the caller must up cast it or down cast it. @param type type of method invocation @param declaringClass Class or interface the method is declared in. If it is a non-staticmethod call then if declaringClass is null, the declared type is taken to be the type of the reference that will be popped. @param methodName name of the method @param returnType class name or primitive type (including "void") of the return type of the method, can not be null. @param numArgs number of arguments to the method (can be 0).


            // Set the correct parameter nodes in the ParameterValueSet at constructor time.
            constructor.dup();
            constructor.push(applicationParameterNumber);
            constructor.push(parameterMode);
            constructor.callMethod(VMOpcode.INVOKEINTERFACE, null,
                    "setParameterMode", "void", 2);


            // Pass the value of the outparameters back to the calling code
            LocalField lf = outParamArrays[i];

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    // declare field
    LocalField field = acb.newFieldDeclaration(Modifier.PRIVATE, type);


    /* Generate the call to the new method */
    mb.pushThis();
    mb.callMethod(VMOpcode.INVOKEVIRTUAL, (String) null, mbsq.getName(), type, 0);


    // generate: field = value (value is on stack)
    mb.setField(field);


    return field;

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//    }
//


        // generate code to reinitializeQualifiers(Qualifier[][] qualifiers)
    executeMB.getField(qualField); // first arg to reinitializeQualifiers()
    executeMB.callMethod(
            VMOpcode.INVOKESTATIC, 
            acb.getBaseClassName(), "reinitializeQualifiers", "void", 1);


    /*
    ** Initialize the Qualifier array to a new Qualifier[][] if

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    ** Generate a call to get an indexable row
    ** with the given number of columns
    */
    acb.pushGetExecutionFactoryExpression(mb); // instance
    mb.push(numberOfColumns);
    mb.callMethod(VMOpcode.INVOKEINTERFACE, ClassName.ExecutionFactory, "getIndexableRow", ClassName.ExecIndexRow, 1);


    /*
    ** Assign the indexable row to a field, and put this assignment into
    ** the constructor for the activation class.  This way, we only have
    ** to get the row once.

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    else
      pred.generateExpressionOperand(optTable, baseColumns[columnNumber], acb, mb);


    mb.upCast(ClassName.DataValueDescriptor);


    mb.callMethod(VMOpcode.INVOKEINTERFACE, ClassName.Row, "setColumn", "void", 2);


    /* Also tell the row if this column uses ordered null semantics */
    if (!isIn)
    {
      RelationalOperator relop = pred.getRelop();

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      }
      if (setOrderedNulls)
      {
        mb.getField(rowField);
        mb.push(columnNumber);
        mb.callMethod(VMOpcode.INVOKEINTERFACE, ClassName.ExecIndexRow, "orderedNulls", "void", 1);
      }
    }
  }


  /**

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    MethodBuilder rmb = acb.startResetMethod();


    rmb.pushThis();
    rmb.push(cursorName);
    rmb.push(preStmt.getObjectName());
    rmb.callMethod(VMOpcode.INVOKEVIRTUAL, ClassName.BaseActivation, "checkPositionedStatement",
            "void", 2);


    rmb.methodReturn();
    rmb.complete();
  }

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      closeActivationMethod.conditionalIfNull();
        // do nothing
        closeActivationMethod.push(0); // work around for no support for real if statements
      closeActivationMethod.startElseCode(); 
        closeActivationMethod.getField(psHolder);
        closeActivationMethod.callMethod(VMOpcode.INVOKEINTERFACE, "java.sql.Statement",
          "close", "void", 0);
        closeActivationMethod.push(0);


      closeActivationMethod.completeConditional();
      closeActivationMethod.endStatement();

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          if (parameterType.endsWith("[]")) {


            // constructor  - setting up correct paramter type info
            MethodBuilder constructor = acb.getConstructor();
            acb.pushThisAsActivation(constructor);
            constructor.callMethod(VMOpcode.INVOKEINTERFACE, null,
                      "getParameterValueSet", ClassName.ParameterValueSet, 0);


            constructor.push(applicationParameterNumber);
            constructor.push(JDBC30Translation.PARAMETER_MODE_UNKNOWN);
            constructor.callMethod(VMOpcode.INVOKEINTERFACE, null,

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            constructor.callMethod(VMOpcode.INVOKEINTERFACE, null,
                      "getParameterValueSet", ClassName.ParameterValueSet, 0);


            constructor.push(applicationParameterNumber);
            constructor.push(JDBC30Translation.PARAMETER_MODE_UNKNOWN);
            constructor.callMethod(VMOpcode.INVOKEINTERFACE, null,
                      "setParameterMode", "void", 2);
            constructor.endStatement();
          }
        }
      }

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