net.sf.jasperreports.engine.query
Interface JRQueryExecuterFactory

All Known Implementing Classes:

JRCsvQueryExecuterFactory, JRHibernateQueryExecuterFactory, JRJdbcQueryExecuterFactory, JRJpaQueryExecuterFactory, JRMdxQueryExecuterFactory, JRMondrianQueryExecuterFactory, JRXmlaQueryExecuterFactory, JRXPathQueryExecuterFactory

public interface JRQueryExecuterFactory

Factory classes used to create query executers.

For each query language, a query executer factory must be created and registered as a JR property.

Query executer factory instances must be thread-safe as they are cached and used as singletons.

Version:

$Id: JRQueryExecuterFactory.java 3034 2009-08-27 11:58:04Z teodord $

Author:

Lucian Chirita ([email protected])

See Also:

JRQueryExecuter

Field Summary

static java.lang.String

QUERY_EXECUTER_FACTORY_PREFIX Prefix for query executer factory properties.

Method Summary

JRQueryExecuter	createQueryExecuter(JRDataset dataset, java.util.Map parameters) Creates a query executer.
java.lang.Object[]	getBuiltinParameters() Returns the built-in parameters associated with this query type.
boolean	supportsQueryParameterType(java.lang.String className) Decides whether the query executers created by this factory support a query parameter type.

Field Detail

QUERY_EXECUTER_FACTORY_PREFIX

static final java.lang.String QUERY_EXECUTER_FACTORY_PREFIX

Prefix for query executer factory properties.

To obtain query executer factories, a property having the query language appended to this prefix is used to get the query executer factory name.

See Also:

Constant Field Values

Method Detail

getBuiltinParameters

java.lang.Object[] getBuiltinParameters()

Returns the built-in parameters associated with this query type.

These parameters will be created as system-defined parameters for each report/dataset having a query of this type.

The returned array should contain consecutive pairs of parameter names and parameter classes (e.g. {"Param1", String.class, "Param2", "List.class"}).

Returns:

array of built-in parameter names and types associated with this query type

createQueryExecuter

JRQueryExecuter createQueryExecuter(JRDataset dataset,
                                    java.util.Map parameters)
                                    throws JRException

Creates a query executer.

This method is called at fill time for reports/datasets having a query supported by this factory.

Parameters:

dataset - the dataset containing the query, fields, etc

parameters - map of value parameters (instances of JRValueParameter) indexed by name

Returns:

a query executer

Throws:

JRException

supportsQueryParameterType

boolean supportsQueryParameterType(java.lang.String className)

Decides whether the query executers created by this factory support a query parameter type.

This check is performed for all $P{..} parameters in the query.

Parameters:

className - the value class name of the parameter

Returns:

whether the parameter value type is supported