This package implements the OGC_Common Catalogue Query Language.
See: Description
Class | Description |
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CQL |
Utility class to parse CQL predicates and expressions to GeoAPI
Filter s and Expression s, respectively. |
CQLCompiler |
CQL Compiler.
|
Exception | Description |
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CQLException |
This exception is produced when the cql input string has syntax errors.
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This package implements the OGC_Common Catalogue Query Language. OGC CQL is the query language to be supported by all OGC Catalogue Interfaces in order to support search interoperability. Catalogue Service Implementation Specification (OGC 04-021r3):
The original BNF was extended thinking in a SQL where expression. The original BNF is reproduced to indicate the extensions highlighted with bold characters.
Extensions in original BNF
<SequenceOfSearchConditions > ::= <search condition> | <SequenceOfSearchConditions> ";" <search condition> <between predicate> ::= <attribute name> [ NOT ] BETWEEN <literal> AND < literal > <routine invocation> ::= <geoop name><georoutine argument list> | <relgeoop name><relgeoop argument list> | <routine name><argument list> | <BBOX> <bbox argument list> <geoop name> ::= EQUAL | DISJOINT | INTERSECT | TOUCH | CROSS | WITHIN | CONTAINS |OVERLAP | RELATE [1] <bbox argument list>::= "(" <attribute> ","<min X> ","<min Y> ","<max X> ","<max Y>["," <crs>] ")" <min X> ::= <signed numerical literal> <min Y> ::= <signed numerical literal> <max X> ::= <signed numerical literal> <max Y> ::= <signed numerical literal> <crs> ::= [2] [1] RELATE is not supported (implementation in GeoTools is required) [2] If not supplied, the BoundingBox CRS is EPSG:4326.
The parser was generated using javacc. In CQLGrammar.jjt file you can see the input grammar for javacc required to parse CQL with extensions.
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