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<section>
<title>Java JMS Selector Syntax</title>
<para>The AMQP Java JMS Messaging Client supports the following syntax for JMS selectors.</para>
<programlisting><![CDATA[
Comments:
LINE_COMMENT: "--" (~["\n","\r"])* EOL
EOL: "\n"|"\r"|"\r\n"
BLOCK_COMMENT: "/*" (~["*"])* "*" ("*" | (~["*","/"] (~["*"])* "*"))* "/"
Reserved Words (case insensitive):
NOT: "NOT"
AND: "AND"
OR: "OR"
BETWEEN: "BETWEEN"
LIKE: "LIKE"
ESCAPE: "ESCAPE"
IN: "IN"
IS: "IS"
TRUE: "TRUE"
FALSE: "FALSE"
NULL: "NULL"
Literals (case insensitive):
DECIMAL_LITERAL: ["1"-"9"] (["0"-"9"])* (["l","L"])?
HEX_LITERAL: "0" ["x","X"] (["0"-"9","a"-"f","A"-"F"])+
OCTAL_LITERAL: "0" (["0"-"7"])*
FLOATING_POINT_LITERAL: ( (["0"-"9"])+ "." (["0"-"9"])* (<EXPONENT>)? // matches: 5.5 or 5. or 5.5E10 or 5.E10
| "." (["0"-"9"])+ (<EXPONENT>)? // matches: .5 or .5E10
| (["0"-"9"])+ <EXPONENT> ) // matches: 5E10
EXPONENT: "E" (["+","-"])? (["0"-"9"])+
STRING_LITERAL: "'" ( ("''") | ~["'"] )* "'"
Identifiers (case insensitive):
ID : ["a"-"z", "_", "$"] (["a"-"z","0"-"9","_", "$"])*
QUOTED_ID : "\"" ( ("\"\"") | ~["\""] )* "\""
Grammar:
JmsSelector := orExpression
orExpression := ( andExpression ( <OR> andExpression )* )
andExpression := ( equalityExpression ( <AND> equalityExpression )* )
equalityExpression := ( comparisonExpression ( "=" comparisonExpression
| "<>" comparisonExpression
| <IS> <NULL>
| <IS> <NOT> <NULL> )* )
comparisonExpression := ( addExpression ( ">" addExpression
| ">=" addExpression
| "<" addExpression
| "<=" addExpression
| <LIKE> stringLitteral ( <ESCAPE> stringLitteral )?
| <NOT> <LIKE> <STRING_LITERAL> ( <ESCAPE> <STRING_LITERAL> )?
| <BETWEEN> addExpression <AND> addExpression
| <NOT> <BETWEEN> addExpression <AND> addExpression
| <IN> "(" <STRING_LITERAL> ( "," <STRING_LITERAL> )* ")"
| <NOT> <IN> "(" <STRING_LITERAL> ( "," <STRING_LITERAL> )* ")" )* )
addExpression := multExpr ( ( "+" multExpr | "-" multExpr ) )*
multExpr := unaryExpr ( "*" unaryExpr | "/" unaryExpr | "%" unaryExpr )*
unaryExpr := ( "+" unaryExpr | "-" unaryExpr | <NOT> unaryExpr | primaryExpr )
primaryExpr := ( literal | variable | "(" orExpression ")" )
literal := ( <STRING_LITERAL>
| <DECIMAL_LITERAL>
| <HEX_LITERAL>
| <OCTAL_LITERAL>
| <FLOATING_POINT_LITERAL>
| <TRUE>
| <FALSE>
| <NULL> )
variable := ( <ID> | <QUOTED_ID> )
]]></programlisting>
</section>
|
