JDOQL BNF E Grammar notation The grammar notation
Appendix 227 Variable Variables ; Variable Variable: Type Identifier Import declaration This section describes the syntax of the declareImports() argument. DeclareImports: ImportDeclarations ;opt ImportDeclarations: ImportDeclaration ImportDeclarations ; ImportDeclaration ImportDeclaration: import Name import Name.* Order specification This section describes the syntax of the setOrdering() argument. SetOrdering: OrderSpecifications ,opt OrderSpecifications: OrderSpecification OrderSpecifications , OrderSpecification OrderSpecification: Identifier ascending Identifier descending Filter expression This section describes the syntax of the setFilter() argument. Basically, the query filter expression is a Java boolean expression, where some of the Java expressions are not permitted. Specifically, pre- and post- increment and decrement (++ and ), shift (>> and <<), and assignment expressions (+=, =, etc.) are not permitted. The description follows the structure of the grammar for Java expression in Chapter 19.12 of the Java Language Specification (Joy et al., 2000). The description is bottom-up, i.e. the last rule expression is the root of the filter expression syntax.
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