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

Interface FilterParser

All Known Implementing Classes:
FilterParserImpl, OrderByParserImpl
public interface FilterParser
Interface which defines a method for parsing a $filter expression to allow different parser implementations

The current expression parser supports expressions as defined in the OData specification 2.0 with the following restrictions - the methods "cast", "isof" and "replace" are not supported The expression parser can be used with providing an Entity Data Model (EDM) an without providing it.

When a EDM is provided the expression parser will be as strict as possible. That means:

  • All properties used in the expression must be defined inside the EDM
  • The types of EDM properties will be checked against the lists of allowed type per method, binary- and unary operator

    • If no EDM is provided the expression parser performs a lax validation

  • The properties used in the expression are not looked up inside the EDM and the type of the expression node representing the property will be "null"
  • Expression node with EDM-types which are "null" are not considered during the parameter type validation, to the return type of the parent expression node will also become "null"

    • Method Summary

      Modifier and Type
      Method
      Description
      FilterExpression
      parseFilterString(String expression)
      Parses a $filter expression string and creates an $orderby expression tree.