org.basex.query

Class QueryParser

java.lang.Object

org.basex.util.InputParser

org.basex.query.QueryParser

Direct Known Subclasses:

QuerySuggest

public class QueryParser
extends InputParser

Parser for XQuery expressions.

Author:

BaseX Team 2005-12, BSD License, Christian Gruen

Field Summary

Fields inherited from class org.basex.util.InputParser

file, ql, qm, qp, query

Constructor Summary

Constructors

Constructor and Description
QueryParser(java.lang.String q, QueryContext c) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
protected void	checkAxis(Axis axis) Performs an optional axis check.
protected void	checkInit() Performs an optional check init.
protected void	checkPred(boolean open) Checks a predicate.
protected void	checkTest(Test test, boolean attr) Performs an optional test check.
QueryException	error(Err err, java.lang.Object... arg) Throws the specified error.
Expr	module(byte[] u) Parses the specified query and starts with the "Module" rule.
Expr	parse(byte[] uri) Parses the specified query or module.

Methods inherited from class org.basex.util.InputParser

consume, consume, consume, curr, curr, file, found, input, mark, more, next, quote, rest

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryParser

public QueryParser(java.lang.String q,
           QueryContext c)
            throws QueryException

Constructor.

Parameters:

q - query

c - query context

Throws:

QueryException - query exception

Method Detail

parse

public final Expr parse(byte[] uri)
                 throws QueryException

Parses the specified query or module. If the specified uri is null, the query is parsed as main module.

Parameters:

uri - module uri.

Returns:

resulting expression

Throws:

QueryException - query exception

module

public final Expr module(byte[] u)
                  throws QueryException

Parses the specified query and starts with the "Module" rule. If the specified uri is null, the query is parsed as main module.

Parameters:

u - module uri

Returns:

resulting expression

Throws:

QueryException - query exception

checkInit

protected void checkInit()

Performs an optional check init.

checkAxis

protected void checkAxis(Axis axis)

Performs an optional axis check.

Parameters:

axis - axis

checkTest

protected void checkTest(Test test,
             boolean attr)

Performs an optional test check.

Parameters:

test - node test

attr - attribute flag

checkPred

protected void checkPred(boolean open)

Checks a predicate.

Parameters:

open - open flag

error

public QueryException error(Err err,
                   java.lang.Object... arg)
                     throws QueryException

Throws the specified error.

Parameters:

err - error to be thrown

arg - error arguments

Returns:

never

Throws:

QueryException - query exception