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java.lang.Objectnet.sf.saxon.expr.ExpressionParser
net.sf.saxon.query.QueryParser
This class defines extensions to the XPath parser to handle the additional syntax supported in XQuery
Nested Class Summary |
Nested classes inherited from class net.sf.saxon.expr.ExpressionParser |
ExpressionParser.ForClause |
Field Summary |
Fields inherited from class net.sf.saxon.expr.ExpressionParser |
env, numberOfRangeVariables, rangeVariables, scanOnly, t |
Constructor Summary | |
QueryParser()
|
Method Summary | |
protected String |
getLanguage()
Get the current language (XPath or XQuery) |
protected void |
grumble(String message)
Report a parsing error |
protected StringValue |
makeStringLiteral(String token)
Method to make a string literal from a token identified as a string literal. |
protected Expression |
parseConstructor()
Parse a node constructor. |
protected Expression |
parseForExpression()
Parse a FLWOR expression. |
void |
parseLibraryModule(String queryString,
StaticQueryContext env)
Parse a library module. |
Expression |
parseQuery(String queryString,
int start,
int terminator,
StaticQueryContext env)
Parse a top-level Query. |
protected Expression |
parseTypeswitchExpression()
Parse a Typeswitch Expression. |
protected Expression |
parseValidateExpression()
Parse a Validate Expression. |
ValidationContext |
parseValidationContext()
Parse a validation context. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public QueryParser()
Method Detail |
public final Expression parseQuery(String queryString, int start, int terminator, StaticQueryContext env) throws XPathException
queryString
- The text of the querystart
- Offset of the start of the queryterminator
- Token expected to follow the query (usually Tokenizer.EOF)env
- The static context
XPathException
- if the expression contains a syntax errorpublic final void parseLibraryModule(String queryString, StaticQueryContext env) throws XPathException
queryString
- The text of the library module.env
- The static context. The result of parsing
a library module is that the static context is populated with a set of function
declarations and variable declarations. Each library module must have its own
static context objext.
XPathException
- if the expression contains a syntax errorprotected void grumble(String message) throws XPathException
grumble
in class ExpressionParser
message
- the error message
XPathException
- always thrown: an exception containing the
supplied messageprotected Expression parseForExpression() throws XPathException
[41] FLWORExpr ::= (ForClause | LetClause)+ WhereClause? OrderByClause? "return" ExprSingle [42] ForClause ::= <"for" "$"> VarName TypeDeclaration? PositionalVar? "in" ExprSingle ("," "$" VarName TypeDeclaration? PositionalVar? "in" ExprSingle)* [43] PositionalVar ::= "at" "$" VarName [44] LetClause ::= <"let" "$"> VarName TypeDeclaration? ":=" ExprSingle ("," "$" VarName TypeDeclaration? ":=" ExprSingle)* [45] WhereClause ::= "where" Expr [46] OrderByClause ::= (<"order" "by"> | <"stable" "order" "by">) OrderSpecList [47] OrderSpecList ::= OrderSpec ("," OrderSpec)* [48] OrderSpec ::= ExprSingle OrderModifier [49] OrderModifier ::= ("ascending" | "descending")? (<"empty" "greatest"> | <"empty" "least">)? ("collation" StringLiteral)?
parseForExpression
in class ExpressionParser
XPathException
- if any error is encounteredprotected Expression parseTypeswitchExpression() throws XPathException
parseTypeswitchExpression
in class ExpressionParser
XPathException
protected Expression parseValidateExpression() throws XPathException
parseValidateExpression
in class ExpressionParser
XPathException
public ValidationContext parseValidationContext() throws XPathException
XPathException
protected Expression parseConstructor() throws XPathException
parseConstructor
in class ExpressionParser
XPathException
- in the event of a syntax error.protected StringValue makeStringLiteral(String token) throws XPathException
makeStringLiteral
in class ExpressionParser
token
-
XPathException
protected String getLanguage()
getLanguage
in class ExpressionParser
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