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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    MethodBuilder userExprFun = ecb.newUserExprFun();


        /* Push the the current row onto the stack. */
        userExprFun.pushThis();
        userExprFun.push( rsNumber );
        userExprFun.callMethod(VMOpcode.INVOKEVIRTUAL, ClassName.BaseActivation, "getCurrentRow", ClassName.Row, 1);


    // Loop through the result columns, computing generated columns
        // as we go. 
        int     size = rcl.size();
        int     startColumn = 0;

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            userExprFun.push(i + 1); // arg1


            rc.generateExpression(ecb, userExprFun);
            userExprFun.cast(ClassName.DataValueDescriptor);
                
            userExprFun.callMethod(VMOpcode.INVOKEINTERFACE, ClassName.Row, "setColumn", "void", 2);
        }


    /* generates:
     *    return;
     * And adds it to userExprFun

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    MethodBuilder userExprFun = ecb.newUserExprFun();


        /* Push the the current row onto the stack. */
        userExprFun.pushThis();
        userExprFun.push( rsNumber );
        userExprFun.callMethod(VMOpcode.INVOKEVIRTUAL, ClassName.BaseActivation, "getCurrentRow", ClassName.Row, 1);


    // Loop through the result columns, computing generated columns
        // as we go. 
        int     size = rcl.size();
        int     startColumn = 0;

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            userExprFun.push(i + 1); // arg1


            rc.generateExpression(ecb, userExprFun);
            userExprFun.cast(ClassName.DataValueDescriptor);
                
            userExprFun.callMethod(VMOpcode.INVOKEINTERFACE, ClassName.Row, "setColumn", "void", 2);
        }


    /* generates:
     *    return;
     * And adds it to userExprFun

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    /* Declare the field and load it with the current row */
    LocalField field = ecb.newFieldDeclaration(Modifier.PRIVATE, ClassName.ExecRow);
        userExprFun.pushThis();
        userExprFun.push( rsNumber );
        userExprFun.callMethod(VMOpcode.INVOKEVIRTUAL, ClassName.BaseActivation, "getCurrentRow", ClassName.Row, 1);
        userExprFun.putField( field );


    // Loop through the result columns, computing generated columns
        // as we go. 
        int     size = rcl.size();

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