Package dev.jcputney.elearning.parser.input.scorm12.adl.prerequisite

Interface PrerequisiteExpression

All Known Implementing Classes:

AndExpression, ItemReference, NotExpression, OrExpression, ParseError

public sealed interface PrerequisiteExpression
permits AndExpression, OrExpression, NotExpression, ItemReference, ParseError

Represents a parsed prerequisite expression in AICC script format.

SCORM 1.2 prerequisites use AICC script syntax which supports:

• & - AND operator (all referenced items must be completed)
• | - OR operator (at least one referenced item must be completed)
• ~ - NOT operator (referenced item must NOT be completed)
• Parentheses for grouping expressions
• Item identifiers referencing other items in the manifest

Example expressions:

• ITEM-001 - Simple reference to a single item
• ITEM-001 & ITEM-002 - Both items must be completed
• ITEM-001 | ITEM-002 - Either item must be completed
• ~ITEM-001 - Item must NOT be completed
• (ITEM-001 & ITEM-002) | ITEM-003 - Grouped expression

This is a sealed interface with the following implementations:

• AndExpression - Represents an AND of multiple expressions
• OrExpression - Represents an OR of multiple expressions
• NotExpression - Represents negation of an expression
• ItemReference - Represents a reference to an item identifier
• ParseError - Represents a parse error for invalid expressions

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	PrerequisiteExpression.Visitor<T>	Visitor pattern for processing prerequisite expressions.

Method Summary

Modifier and Type	Method	Description
<T> T	accept(PrerequisiteExpression.Visitor<T> visitor)	Accepts a visitor to process this expression.

Method Details

accept

<T> T accept(PrerequisiteExpression.Visitor<T> visitor)

Accepts a visitor to process this expression.

Type Parameters:

T - the return type of the visitor

Parameters:

visitor - the visitor to accept

Returns:

the result of the visitor processing this expression