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).

        cb.getField(field); // instance
        cb.push(index + 1); // first arg;


        rc.generateExpression(acb, cb);
        cb.cast(ClassName.DataValueDescriptor); // second arg
        cb.callMethod(VMOpcode.INVOKEINTERFACE, ClassName.Row, "setColumn", "void", 2);
        continue;
      }


      userExprFun.getField(field); // instance
      userExprFun.push(index + 1); // arg1

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        exprFun.getField(lf); // instance for setColumn
        exprFun.push(highestColumnNumber + 1); // first arg


        exprFun.pushThis(); // instance for getRowLocationTemplate
        exprFun.push(savedItem); // first arg
        exprFun.callMethod(VMOpcode.INVOKEINTERFACE, ClassName.Activation, "getRowLocationTemplate",
                  ClassName.RowLocation, 1);


        exprFun.upCast(ClassName.DataValueDescriptor);
        exprFun.callMethod(VMOpcode.INVOKEINTERFACE, ClassName.Row, "setColumn",
                      "void", 2);

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        exprFun.push(savedItem); // first arg
        exprFun.callMethod(VMOpcode.INVOKEINTERFACE, ClassName.Activation, "getRowLocationTemplate",
                  ClassName.RowLocation, 1);


        exprFun.upCast(ClassName.DataValueDescriptor);
        exprFun.callMethod(VMOpcode.INVOKEINTERFACE, ClassName.Row, "setColumn",
                      "void", 2);
        continue;
      }


      /* Skip over those columns whose source is the immediate

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        // and that column positions reflect the stored format/order
      exprFun.getField(lf); // instance
      exprFun.push(colNum + 1); // first arg
      rc.generateHolder(acb, exprFun);


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


      // If there is a bit map of referenced columns, use it to
      // figure out what the next column is, otherwise just go
      // to the next column.
      if (referencedCols != null)

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    MethodBuilder cb = acb.getConstructor();


    acb.pushGetExecutionFactoryExpression(cb); // instance
    cb.push(numCols);
    cb.callMethod(VMOpcode.INVOKEINTERFACE, (String) null,
              rowAllocatorMethod, rowAllocatorType, 1);
    cb.setField(field);
    /* Increase the statement counter in constructor.  Code size in
     * constructor can become too big (more than 64K) for Java compiler
     * to handle (beetle 4293).  We set constant columns in other

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    mb.addThrownException(ClassName.StandardException);


    // put a 'throwIfClosed("execute");' statement into the execute method.
    mb.pushThis(); // instance
    mb.push("execute");
    mb.callMethod(VMOpcode.INVOKEVIRTUAL, ClassName.BaseActivation, "throwIfClosed", "void", 1);


    // call this.startExecution(), so the parent class can know an execution
    // has begun.


    mb.pushThis(); // instance

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    // call this.startExecution(), so the parent class can know an execution
    // has begun.


    mb.pushThis(); // instance
    mb.callMethod(VMOpcode.INVOKEVIRTUAL, ClassName.BaseActivation, "startExecution", "void", 0);


    return  mb;
  }


  MethodBuilder startResetMethod() {

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    MethodBuilder mb = cb.newMethodBuilder(Modifier.PUBLIC,
      "void", "reset");


    mb.addThrownException(ClassName.StandardException);
    mb.pushThis();
    mb.callMethod(VMOpcode.INVOKESPECIAL, ClassName.BaseActivation, "reset", "void", 0);




    return mb;
  }

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      else
      {
        mb.dup();
        mb.upCast(ClassName.DataValueDescriptor);
        mb.push(primitiveTN); 
        mb.callMethod(VMOpcode.INVOKESTATIC, ClassName.BaseActivation, "nullToPrimitiveTest", "void", 2);
      }


      // stack is dvd


      /* Generate the code to get the primitive value */

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      }


      // stack is dvd


      /* Generate the code to get the primitive value */
      mb.callMethod(VMOpcode.INVOKEINTERFACE, ClassName.DataValueDescriptor,
                value.getTypeCompiler().getPrimitiveMethodName(), primitiveTN, 0);


      mb.methodReturn();
      mb.complete();

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