edu.cmu.aura.service.query.parser
Class QParser

java.lang.Object
  |
  +--edu.cmu.aura.service.query.parser.QParser

public class QParser

extends java.lang.Object

This class parses String expressions into a Query object. The PQuery object can be be used to invoke PrimitiveService methods without the need to create an expression manually. Note that unlike SQL, the query parse is case sensitive.

QParser is capable of parsing four types of literal values in expressions: String, Boolean, Double, and Integer. All quoted literals are parsed as String. All unquoted literals with the values true or false are parsed as Boolean. All numeric literals with a decimal point are parsed as Double. All numeric literals without a decimal point are parsed as Integer. Be sure to use the type of literal your service supports. Be especially careful with Integer and Double because your service may not automatically convert.

Examples:

	"select * from City"
	"select * from City where name="Pittsburgh" OR name="Columbus"
	"select name, temp from CityTemp where name!="Pittsburgh"
 

See Also:

Query

Constructor Summary

QParser()

Method Summary

static void	main(java.lang.String[] args)
Query	parseQuery(java.io.InputStream inStream, int querySize)
Query	parseQuery(java.lang.String queryDef)
void	parseSelect(edu.cmu.aura.service.query.parser.PQuery pQuery, java.util.ArrayList selectTokens)

Methods inherited from class java.lang.Object

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

Constructor Detail

QParser

public QParser()

Method Detail

parseQuery

public Query parseQuery(java.io.InputStream inStream,
                        int querySize)
                 throws QParseException,
                        java.io.IOException

QParseException

java.io.IOException

parseQuery

public Query parseQuery(java.lang.String queryDef)
                 throws QParseException

QParseException

parseSelect

public void parseSelect(edu.cmu.aura.service.query.parser.PQuery pQuery,
                        java.util.ArrayList selectTokens)
                 throws QParseException

QParseException

main

public static void main(java.lang.String[] args)