gnu.xquery.lang
Class XQParser

java.lang.Object
  java.io.Reader
      gnu.text.Lexer
          gnu.xquery.lang.XQParser

All Implemented Interfaces:

java.io.Closeable, java.lang.Readable

public class XQParser
extends Lexer

A class to read xquery forms.

Field Summary

static java.lang.String[]	axisNames
Namespace[]	functionNamespacePath
static InstanceOf	instanceOf
static boolean	warnOldVersion

Fields inherited from class gnu.text.Lexer

interactive, nesting, port, tokenBuffer, tokenBufferLength

Fields inherited from class java.io.Reader

lock

Constructor Summary

XQParser(InPort port, SourceMessages messages, XQuery interp)

Method Summary

void	appendNamedEntity(java.lang.String name)
static Expression	booleanValue(Expression exp) Coerce the value of an expresison to a boolean value.
Expression	declError(java.lang.String message)
void	error(char severity, java.lang.String message)
void	getDelimited(java.lang.String delimiter) Scan until a given delimiter.
static boolean	isNamePart(char ch)
static boolean	isNameStart(char ch)
static Expression	makeFunctionExp(java.lang.String className, java.lang.String name)
static Expression	makeFunctionExp(java.lang.String className, java.lang.String fieldName, java.lang.String name)
void	mark() Start tentative parsing.
boolean	match(java.lang.String word)
Expression	parse(Compilation comp) Parse an expression.
Expression	parseDataType()
Type	parseElementType()
Expression	parseFLWRExpression(boolean isFor)
Expression	parseFLWRInner(boolean isFor) Parse a let- or a for-expression.
Expression	parseFunctionDefinition(int declLine, int declColumn)
Expression	parseIfExpr()
Type	parseItemType()
Expression	parseOptionalTypeDeclaration() Parse: ["as" SequenceType]
Expression	parseQuantifiedExpr(boolean isEvery) Parse a some- or an every-expression.
java.lang.Object	parseVariable() Parse a Variable.
Declaration	parseVariableDeclaration()
java.lang.Object	readObject()
void	reset() Stop tentative parsing.
void	setInteractive(boolean v)
void	setType(Declaration decl, Expression type)
static Expression	stringValue(Expression exp) Coerce the value of an expresison to a string value.
Expression	syntaxError(java.lang.String message) Handle syntax errors (at rewrite time).

Methods inherited from class gnu.text.Lexer

checkErrors, checkNext, clearErrors, close, eofError, eofError, error, error, fatal, getColumnNumber, getErrors, getLineNumber, getMessages, getName, getPort, isInteractive, peek, popNesting, pushNesting, read, read, readDigitsInBuffer, readOptionalExponent, seenErrors, setMessages, skip_quick, skip, tokenBufferAppend, unread_quick, unread, unread

Methods inherited from class java.io.Reader

mark, markSupported, read, read, ready, skip

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

warnOldVersion

public static boolean warnOldVersion

instanceOf

public static final InstanceOf instanceOf

functionNamespacePath

public Namespace[] functionNamespacePath

axisNames

public static final java.lang.String[] axisNames

Constructor Detail

XQParser

public XQParser(InPort port,
                SourceMessages messages,
                XQuery interp)

Method Detail

isNameStart

public static boolean isNameStart(char ch)

isNamePart

public static boolean isNamePart(char ch)

mark

public void mark()
          throws java.io.IOException

Description copied from class: Lexer

Start tentative parsing. Must be followed by a reset.

Overrides:

mark in class Lexer

Throws:

java.io.IOException

reset

public void reset()
           throws java.io.IOException

Description copied from class: Lexer

Stop tentative parsing. Return to position where we called mark.

Overrides:

reset in class Lexer

Throws:

java.io.IOException

getDelimited

public void getDelimited(java.lang.String delimiter)
                  throws java.io.IOException,
                         SyntaxException

Scan until a given delimiter. On success, text upto the delimiter is in then tokenBuffer (with tokenBufferLength marking its length); the delimiter is not included.

Throws:

java.io.IOException

SyntaxException

appendNamedEntity

public void appendNamedEntity(java.lang.String name)

setInteractive

public void setInteractive(boolean v)

Overrides:

setInteractive in class Lexer

parseElementType

public Type parseElementType()
                      throws java.io.IOException,
                             SyntaxException

Throws:

java.io.IOException

SyntaxException

parseOptionalTypeDeclaration

public Expression parseOptionalTypeDeclaration()
                                        throws java.io.IOException,
                                               SyntaxException

Parse: ["as" SequenceType]

Throws:

java.io.IOException

SyntaxException

setType

public void setType(Declaration decl,
                    Expression type)

parseDataType

public Expression parseDataType()
                         throws java.io.IOException,
                                SyntaxException

Throws:

java.io.IOException

SyntaxException

parseItemType

public Type parseItemType()
                   throws java.io.IOException,
                          SyntaxException

Throws:

java.io.IOException

SyntaxException

stringValue

public static Expression stringValue(Expression exp)

Coerce the value of an expresison to a string value.

booleanValue

public static Expression booleanValue(Expression exp)

Coerce the value of an expresison to a boolean value.

parseIfExpr

public Expression parseIfExpr()
                       throws java.io.IOException,
                              SyntaxException

Throws:

java.io.IOException

SyntaxException

match

public boolean match(java.lang.String word)

parseVariable

public java.lang.Object parseVariable()
                               throws java.io.IOException,
                                      SyntaxException

Parse a Variable.

Throws:

java.io.IOException

SyntaxException

parseVariableDeclaration

public Declaration parseVariableDeclaration()
                                     throws java.io.IOException,
                                            SyntaxException

Throws:

java.io.IOException

SyntaxException

parseFLWRExpression

public Expression parseFLWRExpression(boolean isFor)
                               throws java.io.IOException,
                                      SyntaxException

Throws:

java.io.IOException

SyntaxException

parseFLWRInner

public Expression parseFLWRInner(boolean isFor)
                          throws java.io.IOException,
                                 SyntaxException

Parse a let- or a for-expression. Assume the 'let'/'for'-token has been seen, and we've read '$'. If we see the 'order' keyword of an 'order by' clause then we top parsing, and return a result as if we instead saw a 'return make-tuple($x, ...)'. The 'order by' clause will get parser by the outer-mot 'for' or 'let'.

Throws:

java.io.IOException

SyntaxException

parseQuantifiedExpr

public Expression parseQuantifiedExpr(boolean isEvery)
                               throws java.io.IOException,
                                      SyntaxException

Parse a some- or an every-expression. Assume the 'some'/'every'-token has been seen, and we've read '$'.

Throws:

java.io.IOException

SyntaxException

parseFunctionDefinition

public Expression parseFunctionDefinition(int declLine,
                                          int declColumn)
                                   throws java.io.IOException,
                                          SyntaxException

Throws:

java.io.IOException

SyntaxException

readObject

public java.lang.Object readObject()
                            throws java.io.IOException,
                                   SyntaxException

Throws:

java.io.IOException

SyntaxException

parse

public Expression parse(Compilation comp)
                 throws java.io.IOException,
                        SyntaxException

Parse an expression. Return null on EOF.

Throws:

java.io.IOException

SyntaxException

makeFunctionExp

public static Expression makeFunctionExp(java.lang.String className,
                                         java.lang.String name)

makeFunctionExp

public static Expression makeFunctionExp(java.lang.String className,
                                         java.lang.String fieldName,
                                         java.lang.String name)

error

public void error(char severity,
                  java.lang.String message)

Overrides:

error in class Lexer

declError

public Expression declError(java.lang.String message)
                     throws java.io.IOException,
                            SyntaxException

Throws:

java.io.IOException

SyntaxException

syntaxError

public Expression syntaxError(java.lang.String message)
                       throws java.io.IOException,
                              SyntaxException

Handle syntax errors (at rewrite time).

Parameters:

message - an error message to print out

Returns:

an ErrorExp

Throws:

java.io.IOException

SyntaxException