public class JRJpaDataSource extends JRAbstractBeanDataSource
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:
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.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.JRJpaQueryExecuterFactory.PROPERTY_JPA_QUERY_PAGE_SIZE
Modifier and Type | Class and Description |
---|---|
protected static interface |
JRJpaDataSource.FieldValueReader |
protected class |
JRJpaDataSource.IndexPropertyReader |
protected class |
JRJpaDataSource.IndexReader |
protected class |
JRJpaDataSource.PropertyReader |
Modifier and Type | Field and Description |
---|---|
protected java.lang.Object |
currentRow |
CURRENT_BEAN_MAPPING, FIELD_DESCRIPTION_PROPERTY_NAME_PROVIDER, FIELD_NAME_PROPERTY_NAME_PROVIDER, propertyNameProvider
Constructor and Description |
---|
JRJpaDataSource(JRJpaQueryExecuter queryExecuter,
int pageSize) |
Modifier and Type | Method and Description |
---|---|
protected void |
fetchPage() |
java.lang.Object |
getFieldValue(JRField field)
Gets the field value for the current position.
|
protected JRJpaDataSource.FieldValueReader |
getFieldValueReader(JRField field) |
void |
moveFirst()
Moves back to the first element in the data source.
|
boolean |
next()
Tries to position the cursor on the next element in the data source.
|
getBeanProperty, getFieldValue, getPropertyName, isCurrentBeanMapping
public JRJpaDataSource(JRJpaQueryExecuter queryExecuter, int pageSize)
protected void fetchPage()
public boolean next()
JRDataSource
public void moveFirst()
JRRewindableDataSource
public java.lang.Object getFieldValue(JRField field) throws JRException
JRDataSource
JRException
protected JRJpaDataSource.FieldValueReader getFieldValueReader(JRField field)
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