org.treetank.service.xml.xpath.parser

Class XPathParser

java.lang.Object

org.treetank.service.xml.xpath.parser.XPathParser

public final class XPathParser
extends Object

XPath Parser

Parses the given XPath query and starts the execution of the XPath request. The given query is send to the scanner that categorizes the symbols by creating tokens. The parser receives this tokens, checks the grammar according to the EBNF given on http://www.w3.org/TR/xquery-xpath-parsing/.Then it constitutes the query execution chain.

Constructor Summary

Constructors

Constructor and Description
XPathParser(INodeReadTrx rtx, String mQuery) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
AbsAxis	getQueryPipeline() Returns a queue containing all pipelines (chains of nested axis and filters) to execute the query.
void	parseQuery() Starts parsing the query.

Methods inherited from class java.lang.Object

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

Constructor Detail

XPathParser

public XPathParser(INodeReadTrx rtx,
           String mQuery)

Constructor. Initializes the internal state.

Parameters:

rtx - The transaction.

mQuery - The query to process.

Method Detail

parseQuery

public void parseQuery()
                throws TTXPathException

Starts parsing the query.

Throws:

TTXPathException

getQueryPipeline

public AbsAxis getQueryPipeline()

Returns a queue containing all pipelines (chains of nested axis and filters) to execute the query.

Returns:

the query pipelines.