Strategy Class Design Pattern [AX 2012]

The Strategy pattern is for doing different things in a similar manner. For example, you have similar switch statements or if statements in your code.

The following code example illustrates similar switch statements:

…
    // First operation
    switch (_direction)
    {
        case up:
             ...
        case down:
             ...
    }
    ...
    ...
}
    ...
    ...

    // Second operation
    switch (_direction)
    {
        case up:
             ...
        case down:
             ...
    }

The following illustrates an example where you split up your code in a class hierarchy:

The following code example illustrates using a construct object and a direction object at the start of your code. Then work on the correct direction object in an abstract way after.

Direction direction = Direction::construct(_direction);
     ...
    direction.firstOperation();
    direction.firstOperation();
     ...
    direction.firstOperation();
     ...
     ...
    direction.secondOperation();
     ...

The correct process will occur as the direction object is instantiated to the correct situation.