DataSourceCollection (JasperReports 6.1.1 API)

java.lang.Object
- net.sf.jasperreports.data.DataSourceCollection<D,P>

All Implemented Interfaces:

JRDataSource

Direct Known Subclasses:

RewindableDataSourceCollection
```
public class DataSourceCollection<D extends JRDataSource,P extends DataSourceProvider<D>>
extends java.lang.Object
implements JRDataSource
```
Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Field Summary

Fields
Modifier and Type	Field and Description
`protected D`	`currentDataSource`
`protected boolean`	`empty`
`static java.lang.String`	`EXCEPTION_MESSAGE_KEY_METHOD_CALL_ERROR`
`protected java.util.ListIterator<? extends P>`	`providerIterator`

Constructor Summary

Constructors
Constructor and Description

DataSourceCollection(java.util.List<? extends P> dataSourceProviders)

Constructors
Constructor and Description
`DataSourceCollection(java.util.List<? extends P> dataSourceProviders)`

Method Summary

Methods
Modifier and Type	Method and Description
`D`	`currentDataSource()`
`java.lang.Object`	`getFieldValue(JRField field)` Gets the field value for the current position.
`boolean`	`next()` Tries to position the cursor on the next element in the data source.
`protected void`	`start()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - EXCEPTION_MESSAGE_KEY_METHOD_CALL_ERROR
```
public static final java.lang.String EXCEPTION_MESSAGE_KEY_METHOD_CALL_ERROR
```
    See Also:
    Constant Field Values
  - empty
```
protected final boolean empty
```
  - providerIterator
```
protected final java.util.ListIterator<? extends P extends DataSourceProvider<D>> providerIterator
```
  - currentDataSource
```
protected D extends JRDataSource currentDataSource
```
- Constructor Detail
  - DataSourceCollection
```
public DataSourceCollection(java.util.List<? extends P> dataSourceProviders)
                     throws JRException
```
    Throws:
    
    JRException
- Method Detail
  - start
```
protected final void start()
                    throws JRException
```
    Throws:
    
    JRException
  - currentDataSource
```
public D currentDataSource()
```
  - next
```
public boolean next()
             throws JRException
```
    Description copied from interface: JRDataSource
    
    Tries to position the cursor on the next element in the data source.
    
    Specified by:
    
    next in interface JRDataSource
    
    Returns:
    true if there is a next record, false otherwise
    
    Throws:
    
    JRException - if any error occurs while trying to move to the next element
  - getFieldValue
```
public java.lang.Object getFieldValue(JRField field)
                               throws JRException
```
    Description copied from interface: JRDataSource
    
    Gets the field value for the current position.
    
    Specified by:
    
    getFieldValue in interface JRDataSource
    
    Returns:
    an object containing the field value. The object type must be the field object type.
    
    Throws:
    
    JRException

Class DataSourceCollection<D extends JRDataSource,P extends DataSourceProvider<D>>

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

EXCEPTION_MESSAGE_KEY_METHOD_CALL_ERROR

empty

providerIterator

currentDataSource

Constructor Detail

DataSourceCollection

Method Detail

start

currentDataSource

next

getFieldValue