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

Simple query parser; can be overwritten to support more complex parsings.

Author:

Workgroup DBIS, University of Konstanz 2005-09, ISC License, Christian Gruen

Field Summary

TokenList

modLoaded List of loaded modules.

Fields inherited from class org.basex.util.InputParser

file, ql, qm, qp, qu

Constructor Summary

QueryParser(QueryContext c)
Constructor.

Method Summary

Expr	parse(java.lang.String q, IO f, Uri u) Parses the specified query.
Expr	parse(Uri u, boolean end) Parses the specified query.
Expr	path() [ 68] Parses a PathExpr

Methods inherited from class org.basex.util.InputParser

consume, consume, consumeWS, curr, curr, ent, found, init, invalidEnt, mark, more, next, quote, rest, valid

Methods inherited from class java.lang.Object

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

Field Detail

modLoaded

public TokenList modLoaded

List of loaded modules.

Constructor Detail

QueryParser

public QueryParser(QueryContext c)

Constructor.

Parameters:

c - query context

Method Detail

parse

public Expr parse(java.lang.String q,
                  IO f,
                  Uri u)
           throws QueryException

Parses the specified query. If uri != null, the query is treated as a module

Parameters:

q - input query

f - optional input file

u - module uri

Returns:

resulting expression

Throws:

QueryException - query exception

parse

public Expr parse(Uri u,
                  boolean end)
           throws QueryException

Parses the specified query. If uri != null, the query is treated as a module [ 1] Parses a Module.

Parameters:

u - module uri

end - if true, input must be completely evaluated

Returns:

resulting expression

Throws:

QueryException - query exception

path

public Expr path()
          throws QueryException

[ 68] Parses a PathExpr. [ 69] Parses a RelativePathExpr.

Returns:

query expression

Throws:

QueryException - query exception