eworks.eRQL.model
Class Query

java.lang.Object
  eworks.eRQL.model.ModelComponent
      eworks.eRQL.model.Value
          eworks.eRQL.model.Query

Direct Known Subclasses:

DocumentQuery, PoiQuery, StatementQuery

public class Query

extends Value

Abstract base class for subqueries.

Version:

1.00 (2003-11-03)

Author:

Fabian Wleklinski (fabian@wleklinski.de)

Field Summary

protected Value

value

Constructor Summary

Query()
Creates an empty statement query.

Query(Value value)
Creates an query and encapsulated the given value.

Method Summary

Value	compact() Compacts this query and returns the result.
Tuples	query(RqlEngine rqlEngine) Evaluates this query and returns the result using the given rqlEngine.
String	toString() Returns this query's string representation.

Methods inherited from class java.lang.Object

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

Field Detail

value

protected Value value

Constructor Detail

Query

public Query()

Creates an empty statement query.

Query

public Query(Value value)

Creates an query and encapsulated the given value.

Method Detail

toString

public String toString()

Returns this query's string representation.

Overrides:

toString in class ModelComponent

Returns:

this query's string representation.

compact

public Value compact()

Compacts this query and returns the result.

Overrides:

compact in class Value

Returns:

the compacted query.

query

public Tuples query(RqlEngine rqlEngine)
             throws RqlExecutingException

Evaluates this query and returns the result using the given rqlEngine.

Specified by:

query in class Value

Parameters:

rqlEngine - The RqlEngine to execute.

Returns:

the query's result.

Throws:

RqlExecutingException - if something goes wrong.