org.apache.jackrabbit.commons.query

Interface QueryObjectModelBuilder

All Known Implementing Classes:

SQL2QOMBuilder

public interface QueryObjectModelBuilder

QueryObjectModelBuilder defines an interface for building a query object model from a string based query statement and vice versa.

Method Summary

Modifier and Type	Method and Description
boolean	canHandle(String language) Returns true if this QOM builder can handle a statement in language.
QueryObjectModel	createQueryObjectModel(String statement, QueryObjectModelFactory qf, ValueFactory vf) Creates a new query object model from the given statement using the passed QOM and value factory.
String[]	getSupportedLanguages() Returns the set of query languages supported by this builder.
String	toString(QueryObjectModel qom) Creates a String representation of the query object model in the syntax this QueryObjectModelBuilder can handle.

Method Detail

createQueryObjectModel

QueryObjectModel createQueryObjectModel(String statement,
                                        QueryObjectModelFactory qf,
                                        ValueFactory vf)
                                 throws InvalidQueryException,
                                        RepositoryException

Creates a new query object model from the given statement using the passed QOM and value factory.

Parameters:

statement - the query statement.

qf - the query object model factory.

vf - the value factory.

Returns:

the query object model for the given statement.

Throws:

InvalidQueryException - if the statement is invalid.

RepositoryException - if another error occurs.

canHandle

boolean canHandle(String language)

Returns true if this QOM builder can handle a statement in language.

Parameters:

language - the language of a query statement to build a QOM.

Returns:

true if this builder can handle language; false otherwise.

getSupportedLanguages

String[] getSupportedLanguages()

Returns the set of query languages supported by this builder.

Returns:

String array containing the names of the supported languages.

toString

String toString(QueryObjectModel qom)
         throws InvalidQueryException

Creates a String representation of the query object model in the syntax this QueryObjectModelBuilder can handle.

Parameters:

qom - the query object model.

Returns:

a String representation of the QOM.

Throws:

InvalidQueryException - if the query object model cannot be converted into a String representation due to restrictions in this syntax.