com.ur.urcap.api.domain.variable

Interface VariableFactory

public interface VariableFactory

This interface supplies methods to create variable objects.

NOTE: Only use this functionality in a URCap program node (not relevant for an installation node).

Method Summary

Modifier and Type	Method and Description
GlobalVariable	createGlobalVariable(String suggestedName) Creates a global variable.
GlobalVariable	createGlobalVariable(String suggestedName, Expression initialValue) Creates a global variable.

Method Detail

createGlobalVariable

GlobalVariable createGlobalVariable(String suggestedName)
                             throws VariableException

Creates a global variable. Registering the variable in PolyScope (by storing it in a DataModel instance or using it for the configuration of a built-in PolyScope program node) will make it accessible to all program nodes.

NOTE: Only use this method in a URCap program node (not relevant for an installation node).

Parameters:

suggestedName - Suggested name of the variable. Valid names must match regex [a-zA-Z][a-zA-Z0-9_]{0,14} for a total of 15 characters.

Returns:

GlobalVariable.

Throws:

VariableException - In case of an illegal name.

createGlobalVariable

GlobalVariable createGlobalVariable(String suggestedName,
                                    Expression initialValue)
                             throws VariableException

Creates a global variable.

Registering the variable in PolyScope (by storing it in a DataModel instance or using it for the configuration of a built-in PolyScope program node) will make it accessible to all program nodes.

Setting an initial value will make it possible to read from the variable immediately without having to assign a value to it first. This can be useful in various constructs which requires an initial value, e.g. 'var_1 = var_1 + 1' or 'if (var_2 == 0):'.

NOTE: Only use this method in a URCap program node (not relevant for an installation node).

Parameters:

suggestedName - Suggested name of the variable. Valid names must match regex [a-zA-Z][a-zA-Z0-9_]{0,14} for a total of 15 characters.

initialValue - The expression that will be evaluated in order to initialize the value of the variable. This value is assigned before the actual program runs.

Returns:

GlobalVariable.

Throws:

VariableException - In case of an illegal name.