Examples of net.sf.jasperreports.engine.data.JRJpaDataSource

net.sf.jasperreports.engine.data.JRJpaDataSource

Java Persistence API data source that uses javax.persistence.Query.getResultList().

The query result can be paginated by not retrieving all the rows at once.

Fields are mapped to values in the result following these rules:

if the query returns a single object/bean (e.g. SELECT m FROM Movie m or SELECT NEW MovieDescription(m.title, m.genre) FROM Movie m), then the fields are mapped to bean property names.
if the query returns multiple objects per row (e.g. SELECT m.title, m.gender FROM Movie m), the fields are mapped using the following syntax: COLUMN_index[.property], with the indexes starting from 1. Example mappings: COLUMN_1, COLUMN_2, COLUMN_2.title, COLUMN_2.movie.title.

@author Marcel Overdijk (marceloverdijk@hotmail.com) @version $Id: JRJpaDataSource.java 3438 2010-02-18 14:39:36Z teodord $ @see net.sf.jasperreports.engine.query.JRJpaQueryExecuterFactory#PROPERTY_JPA_QUERY_PAGE_SIZE

    try {
      int pageSize = JRProperties.getIntegerProperty(dataset, 
          JRJpaQueryExecuterFactory.PROPERTY_JPA_QUERY_PAGE_SIZE,
          0);


      resDatasource = new JRJpaDataSource(this, pageSize);
    }
    catch (NumberFormatException e) {
      throw new JRRuntimeException("The " + JRJpaQueryExecuterFactory.PROPERTY_JPA_QUERY_PAGE_SIZE +
          " property must be numerical.",e);
    }

Examples of net.sf.jasperreports.engine.data.JRJpaDataSource

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