docs/4.0/cayenne-guide/expressions-bnf.html - cayenne-website - Git at Google

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    <title xmlns:d="http://docbook.org/ns/docbook">Appendix&nbsp;C.&nbsp;Expressions BNF</title><link rel="stylesheet" type="text/css" href="css/cayenne-doc.css"><meta xmlns:d="http://docbook.org/ns/docbook" name="keywords" content="Cayenne 4.0 documentation"><meta xmlns:d="http://docbook.org/ns/docbook" name="description" content="User documentation for Apache Cayenne version 4.0"><link rel="home" href="index.html" title="Cayenne Guide"><link rel="up" href="index.html" title="Cayenne Guide"><link rel="prev" href="service-collections.html" title="Appendix&nbsp;B.&nbsp;Service Collections"><script xmlns:d="http://docbook.org/ns/docbook" type="text/javascript">
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         </script></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div xmlns:d="http://docbook.org/ns/docbook" class="navheader"><table width="100%" summary="Navigation header"><tr><th class="versioninfo">v.4.0 (4.0.M5)</th><th align="center">Appendix&nbsp;C.&nbsp;Expressions BNF</th><th></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="service-collections.html">Prev</a>&nbsp;</td><th width="60%" align="center">&nbsp;</th><td width="20%" align="right">&nbsp;</td></tr></table><hr></div><div class="appendix"><div class="titlepage"><div><div><h1 class="title"><a name="expressions-bnf"></a>Appendix&nbsp;C.&nbsp;Expressions BNF</h1></div></div></div><p>
         </p><pre class="programlisting">
 TOKENS
 &lt;DEFAULT&gt; SKIP : {
 " "
 | "\t"
 | "\n"
 | "\r"
 }

 &lt;DEFAULT&gt; TOKEN : {
 &lt;NULL: "null" | "NULL"&gt;
 | &lt;TRUE: "true" | "TRUE"&gt;
 | &lt;FALSE: "false" | "FALSE"&gt;
 }

 &lt;DEFAULT&gt; TOKEN : {
 &lt;PROPERTY_PATH: &lt;IDENTIFIER&gt; ("." &lt;IDENTIFIER&gt;)*&gt;
 }

 &lt;DEFAULT&gt; TOKEN : {
 &lt;IDENTIFIER: &lt;LETTER&gt; (&lt;LETTER&gt; | &lt;DIGIT&gt;)* (["+"])?&gt;
 | &lt;#LETTER: ["_","a"-"z","A"-"Z"]&gt;
 | &lt;#DIGIT: ["0"-"9"]&gt;
 }

 /**
  * Quoted Strings, whose object value is stored in the token manager's
  * "literalValue" field. Both single and double qoutes are allowed
  */&lt;DEFAULT&gt; MORE : {
 "\'" : WithinSingleQuoteLiteral
 | "\"" : WithinDoubleQuoteLiteral
 }

 &lt;WithinSingleQuoteLiteral&gt; MORE : {
 &lt;ESC: "\\" (["n","r","t","b","f","\\","\'","`","\""] | (["0"-"3"])? ["0"-"7"] (["0"-"7"])?)&gt; : {
 | &lt;~["\'","\\"]&gt; : {
 }

 &lt;WithinSingleQuoteLiteral&gt; TOKEN : {
 &lt;SINGLE_QUOTED_STRING: "\'"&gt; : DEFAULT
 }

 &lt;WithinDoubleQuoteLiteral&gt; MORE : {
 &lt;STRING_ESC: &lt;ESC&gt;&gt; : {
 | &lt;~["\"","\\"]&gt; : {
 }

 &lt;WithinDoubleQuoteLiteral&gt; TOKEN : {
 &lt;DOUBLE_QUOTED_STRING: "\""&gt; : DEFAULT
 }

 /**
  * Integer or real Numeric literal, whose object value is stored in the token manager's
  * "literalValue" field.
  */&lt;DEFAULT&gt; TOKEN : {
 &lt;INT_LITERAL: ("0" (["0"-"7"])* | ["1"-"9"] (["0"-"9"])* | "0" ["x","X"] (["0"-"9","a"-"f","A"-"F"])+)
         (["l","L","h","H"])?&gt; : {
 | &lt;FLOAT_LITERAL: &lt;DEC_FLT&gt; (&lt;EXPONENT&gt;)? (&lt;FLT_SUFF&gt;)? | &lt;DEC_DIGITS&gt; &lt;EXPONENT&gt; (&lt;FLT_SUFF&gt;)?
 | &lt;DEC_DIGITS&gt; &lt;FLT_SUFF&gt;&gt; : {
 | &lt;#DEC_FLT: (["0"-"9"])+ "." (["0"-"9"])* | "." (["0"-"9"])+&gt;
 | &lt;#DEC_DIGITS: (["0"-"9"])+&gt;
 | &lt;#EXPONENT: ["e","E"] (["+","-"])? (["0"-"9"])+&gt;
 | &lt;#FLT_SUFF: ["d","D","f","F","b","B"]&gt;
 }

 NON-TERMINALS
     expression    :=    orCondition &lt;EOF&gt;
     orCondition    :=    andCondition ( "or" andCondition )*
     andCondition    :=    notCondition ( "and" notCondition )*
     notCondition    :=    ( "not" | "!" ) simpleCondition
         |    simpleCondition
     simpleCondition    :=    &lt;TRUE&gt;
         |    &lt;FALSE&gt;
         |    scalarConditionExpression
              ( simpleNotCondition
                | ( "=" | "==" ) scalarExpression
                | ( "!=" | "&lt;&gt;" ) scalarExpression
                | "&lt;=" scalarExpression
                | "&lt;" scalarExpression | "&gt;" scalarExpression
                | "&gt;=" scalarExpression
                | "like" scalarExpression
                | "likeIgnoreCase" scalarExpression
                | "in" ( namedParameter | "(" scalarCommaList ")" )
                | "between" scalarExpression "and" scalarExpression
              )?
     simpleNotCondition    :=    ( "not" | "!" )
              ( "like" scalarExpression
                | "likeIgnoreCase" scalarExpression
                | "in" ( namedParameter | "(" scalarCommaList ")" )
                | "between" scalarExpression "and" scalarExpression
              )
     scalarCommaList    :=    ( scalarConstExpression ( "," scalarConstExpression )* )
     scalarConditionExpression    :=    scalarNumericExpression
         |    &lt;SINGLE_QUOTED_STRING&gt;
         |    &lt;DOUBLE_QUOTED_STRING&gt;
         |    &lt;NULL&gt;
     scalarExpression    :=    scalarConditionExpression
         |    &lt;TRUE&gt;
         |    &lt;FALSE&gt;
     scalarConstExpression    :=    &lt;SINGLE_QUOTED_STRING&gt;
         |    &lt;DOUBLE_QUOTED_STRING&gt;
         |    namedParameter
         |    &lt;INT_LITERAL&gt;
         |    &lt;FLOAT_LITERAL&gt;
         |    &lt;TRUE&gt;
         |    &lt;FALSE&gt;
     scalarNumericExpression    :=    multiplySubtractExp
              ( "+" multiplySubtractExp | "-" multiplySubtractExp )*
     multiplySubtractExp    :=    numericTerm ( "*" numericTerm | "/" numericTerm )*
     numericTerm    :=    ( "+" )? numericPrimary
         |    "-" numericPrimary
     numericPrimary    :=    "(" orCondition ")"
         |    pathExpression
         |    namedParameter
         |    &lt;INT_LITERAL&gt;
         |    &lt;FLOAT_LITERAL&gt;
     namedParameter    :=    "$" &lt;PROPERTY_PATH&gt;
     pathExpression    :=    ( &lt;PROPERTY_PATH&gt;
                             | "obj:" &lt;PROPERTY_PATH&gt;
                             | "db:" &lt;PROPERTY_PATH&gt;
                             | "enum:" &lt;PROPERTY_PATH&gt;  )

 </pre><p>
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	<html><head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
	<title xmlns:d="http://docbook.org/ns/docbook">Appendix C. Expressions BNF</title><link rel="stylesheet" type="text/css" href="css/cayenne-doc.css"><meta xmlns:d="http://docbook.org/ns/docbook" name="keywords" content="Cayenne 4.0 documentation"><meta xmlns:d="http://docbook.org/ns/docbook" name="description" content="User documentation for Apache Cayenne version 4.0"><link rel="home" href="index.html" title="Cayenne Guide"><link rel="up" href="index.html" title="Cayenne Guide"><link rel="prev" href="service-collections.html" title="Appendix B. Service Collections"><script xmlns:d="http://docbook.org/ns/docbook" type="text/javascript">
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	</script></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div xmlns:d="http://docbook.org/ns/docbook" class="navheader"><table width="100%" summary="Navigation header"><tr><th class="versioninfo">v.4.0 (4.0.M5)</th><th align="center">Appendix C. Expressions BNF</th><th></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="service-collections.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> </td></tr></table><hr></div><div class="appendix"><div class="titlepage"><div><div><h1 class="title"><a name="expressions-bnf"></a>Appendix C. Expressions BNF</h1></div></div></div><p>
	</p><pre class="programlisting">
	TOKENS
	<DEFAULT> SKIP : {
	" "
	\| "\t"
	\| "\n"
	\| "\r"
	}

	<DEFAULT> TOKEN : {
	<NULL: "null" \| "NULL">
	\| <TRUE: "true" \| "TRUE">
	\| <FALSE: "false" \| "FALSE">
	}

	<DEFAULT> TOKEN : {
	<PROPERTY_PATH: <IDENTIFIER> ("." <IDENTIFIER>)*>
	}

	<DEFAULT> TOKEN : {
	<IDENTIFIER: <LETTER> (<LETTER> \| <DIGIT>)* (["+"])?>
	\| <#LETTER: ["_","a"-"z","A"-"Z"]>
	\| <#DIGIT: ["0"-"9"]>
	}

	/**
	* Quoted Strings, whose object value is stored in the token manager's
	* "literalValue" field. Both single and double qoutes are allowed
	*/<DEFAULT> MORE : {
	"\'" : WithinSingleQuoteLiteral
	\| "\"" : WithinDoubleQuoteLiteral
	}

	<WithinSingleQuoteLiteral> MORE : {
	<ESC: "\\" (["n","r","t","b","f","\\","\'","`","\""] \| (["0"-"3"])? ["0"-"7"] (["0"-"7"])?)> : {
	\| <~["\'","\\"]> : {
	}

	<WithinSingleQuoteLiteral> TOKEN : {
	<SINGLE_QUOTED_STRING: "\'"> : DEFAULT
	}

	<WithinDoubleQuoteLiteral> MORE : {
	<STRING_ESC: <ESC>> : {
	\| <~["\"","\\"]> : {
	}

	<WithinDoubleQuoteLiteral> TOKEN : {
	<DOUBLE_QUOTED_STRING: "\""> : DEFAULT
	}

	/**
	* Integer or real Numeric literal, whose object value is stored in the token manager's
	* "literalValue" field.
	*/<DEFAULT> TOKEN : {
	<INT_LITERAL: ("0" (["0"-"7"])* \| ["1"-"9"] (["0"-"9"])* \| "0" ["x","X"] (["0"-"9","a"-"f","A"-"F"])+)
	(["l","L","h","H"])?> : {
	\| <FLOAT_LITERAL: <DEC_FLT> (<EXPONENT>)? (<FLT_SUFF>)? \| <DEC_DIGITS> <EXPONENT> (<FLT_SUFF>)?
	\| <DEC_DIGITS> <FLT_SUFF>> : {
	\| <#DEC_FLT: (["0"-"9"])+ "." (["0"-"9"])* \| "." (["0"-"9"])+>
	\| <#DEC_DIGITS: (["0"-"9"])+>
	\| <#EXPONENT: ["e","E"] (["+","-"])? (["0"-"9"])+>
	\| <#FLT_SUFF: ["d","D","f","F","b","B"]>
	}

	NON-TERMINALS
	expression := orCondition <EOF>
	orCondition := andCondition ( "or" andCondition )*
	andCondition := notCondition ( "and" notCondition )*
	notCondition := ( "not" \| "!" ) simpleCondition
	\| simpleCondition
	simpleCondition := <TRUE>
	\| <FALSE>
	\| scalarConditionExpression
	( simpleNotCondition
	\| ( "=" \| "==" ) scalarExpression
	\| ( "!=" \| "<>" ) scalarExpression
	\| "<=" scalarExpression
	\| "<" scalarExpression \| ">" scalarExpression
	\| ">=" scalarExpression
	\| "like" scalarExpression
	\| "likeIgnoreCase" scalarExpression
	\| "in" ( namedParameter \| "(" scalarCommaList ")" )
	\| "between" scalarExpression "and" scalarExpression
	)?
	simpleNotCondition := ( "not" \| "!" )
	( "like" scalarExpression
	\| "likeIgnoreCase" scalarExpression
	\| "in" ( namedParameter \| "(" scalarCommaList ")" )
	\| "between" scalarExpression "and" scalarExpression
	)
	scalarCommaList := ( scalarConstExpression ( "," scalarConstExpression )* )
	scalarConditionExpression := scalarNumericExpression
	\| <SINGLE_QUOTED_STRING>
	\| <DOUBLE_QUOTED_STRING>
	\| <NULL>
	scalarExpression := scalarConditionExpression
	\| <TRUE>
	\| <FALSE>
	scalarConstExpression := <SINGLE_QUOTED_STRING>
	\| <DOUBLE_QUOTED_STRING>
	\| namedParameter
	\| <INT_LITERAL>
	\| <FLOAT_LITERAL>
	\| <TRUE>
	\| <FALSE>
	scalarNumericExpression := multiplySubtractExp
	( "+" multiplySubtractExp \| "-" multiplySubtractExp )*
	multiplySubtractExp := numericTerm ( "" numericTerm \| "/" numericTerm )
	numericTerm := ( "+" )? numericPrimary
	\| "-" numericPrimary
	numericPrimary := "(" orCondition ")"
	\| pathExpression
	\| namedParameter
	\| <INT_LITERAL>
	\| <FLOAT_LITERAL>
	namedParameter := "$" <PROPERTY_PATH>
	pathExpression := ( <PROPERTY_PATH>
	\| "obj:" <PROPERTY_PATH>
	\| "db:" <PROPERTY_PATH>
	\| "enum:" <PROPERTY_PATH> )

	</pre><p>
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