Attributes, relationships, and operations of objects

The attributes, relationships, and operations of an object are its properties. ASL assigns values to properties by using the following syntax:

         <objectRef>-><property> = <value>;

The <objectRef> is the object handle for the object. You assign the object handle by using the create() or object() functions or through a relationship.

The following script loads the names of all instances of the classes “Card” and “Port” into a Domain Manager. The datafile contains a card name followed by the ports associated with the card. As this script loads cards and ports, it creates a relationship between a card and its ports.

Relationships between objects in MODEL are paired. It is not necessary to define both relationships. Define one relationship. Its converse is defined by default.

ASL Script (properties_obj.asl):
START {
 CARD rep(PORT)
}
CARD {
 "CARD:" cardname:word eol
}
do {
 cardObj = create("Card",cardname);
}
PORT {
 portname:word eol
 }
do {
 portObj = create("Port",portname);
 cardObj->ComposedOf += portObj;
 print(portObj." ".cardObj);
}
Input (create_obj.asl):
CARD: CARD0
 PORT00
 PORT01
 PORT02
 PORT03
CARD: CARD1
 PORT10
 PORT11
 PORT12
CARD: CARD2
 PORT20
 PORT21
 PORT22
 PORT23
 PORT24
 PORT25
Output:
$ sm_adapter --server=JS1 --file=create_obj.txt properties_obj.asl
Port::PORT00 Card::CARD0
Port::PORT01 Card::CARD0
Port::PORT02 Card::CARD0
Port::PORT03 Card::CARD0
Port::PORT10 Card::CARD1
Port::PORT11 Card::CARD1
Port::PORT12 Card::CARD1
Port::PORT20 Card::CARD2
Port::PORT21 Card::CARD2
Port::PORT22 Card::CARD2
Port::PORT23 Card::CARD2
Port::PORT24 Card::CARD2
Port::PORT25 Card::CARD2
$ 

The value stored in <objectRef>-><property >can also be assigned to an ASL variable.

         <variable> = <objectRef>-><property>;

You can refer to properties indirectly. This is a two-step process. First, assign the property to a variable. Second, the variable can be used in place of the property in conjunction with an indirection operator (->*).

propertyname = “property”;
objRef->*propertyname = "UP";

The syntax objRef->*variable allows you to access an attribute by variable. The following code sample assigns the attribute name to a variable, then makes a reference to that attribute through the indirection operator. The output is the creation class name of the given object.

 variable = “CreationClassName”;
 c = objRef->*variable;
 print(c);

When you run this ASL script on a router object, the output is “Router”.