Package org.apache.olingo.odata2.api.uri.expression

Interface Visitable

All Known Subinterfaces:
BinaryExpression, CommonExpression, FilterExpression, LiteralExpression, MemberExpression, MethodExpression, OrderByExpression, OrderExpression, PropertyExpression, UnaryExpression
All Known Implementing Classes:
BinaryExpressionImpl, FilterExpressionImpl, LiteralExpressionImpl, MemberExpressionImpl, MethodExpressionImpl, OrderByExpressionImpl, OrderExpressionImpl, PropertyExpressionImpl, UnaryExpressionImpl
public interface Visitable
The interface Visitable is part of the visitor pattern used to traverse the expression tree build from a $filter expression string or $orderby expression string. It is implemented by each class used as node in an expression tree.
See Also:

  • Method Details

    • accept

      Object accept(ExpressionVisitor visitor) throws ExceptionVisitExpression, ODataApplicationException
      Method accept(ExpressionVisitor) is called when traversing the expression tree. This method is invoked on each expression used as node in an expression tree. The implementations should behave as follows:
    • Call accept on all sub nodes and store the returned Objects
    • Call the appropriate method on the ExpressionVisitor instance and provide the stored objects to that instance
    • Return the object which should be passed to the processing algorithm of the parent expression node

      • Parameters:
      visitor - Object ( implementing ExpressionVisitor) whose methods are called during traversing a expression node of the expression tree.
      Returns:
      Object which should be passed to the processing algorithm of the parent expression node
      Throws:
      ExceptionVisitExpression - Exception occurred the OData library while traversing the tree
      ODataApplicationException - Exception thrown by the application who implemented the visitor