ExternalIDJoinDatabaseConnection (ELKI: Environment for DeveLoping KDD-Applications Supported by Index-Structures)

java.lang.Object
- elki.datasource.AbstractDatabaseConnection
- - elki.datasource.ExternalIDJoinDatabaseConnection

All Implemented Interfaces:

DatabaseConnection
```
public class ExternalIDJoinDatabaseConnection
extends AbstractDatabaseConnection
```
Joins multiple data sources by their label

Since:

0.4.0

Author:

Erich Schubert

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class ExternalIDJoinDatabaseConnection.Par
Parameterization class.

Field Summary

Fields
Modifier and Type Field Description

private static Logging LOG
Logger

protected java.util.List<? extends DatabaseConnection> sources
The filters to invoke
- Fields inherited from class elki.datasource.AbstractDatabaseConnection
  filters, LABEL_CONCATENATION

Constructor Summary

Constructors
Constructor	Description
`ExternalIDJoinDatabaseConnection(java.util.List<? extends ObjectFilter> filters, java.util.List<? extends DatabaseConnection> sources)`	Constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected Logging`	`getLogger()`	Get the logger for this database connection.
`MultipleObjectsBundle`	`loadData()`	Returns the initial data for a database.

Methods inherited from class elki.datasource.AbstractDatabaseConnection
invokeBundleFilters, invokeStreamFilters

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

- Field Detail
  - LOG
```
private static final Logging LOG
```
    Logger
  - sources
```
protected final java.util.List<? extends DatabaseConnection> sources
```
    The filters to invoke
- Constructor Detail
  - ExternalIDJoinDatabaseConnection
```
public ExternalIDJoinDatabaseConnection(java.util.List<? extends ObjectFilter> filters,
                                        java.util.List<? extends DatabaseConnection> sources)
```
    Constructor.
    
    Parameters:
    
    filters - Filters to use.
    
    sources - Data sources to join.
- Method Detail
  - loadData
```
public MultipleObjectsBundle loadData()
```
    Description copied from interface: DatabaseConnection
    
    Returns the initial data for a database.
    
    Returns:
    
    a database object bundle
  - getLogger
```
protected Logging getLogger()
```
    Description copied from class: AbstractDatabaseConnection
    
    Get the logger for this database connection.
    
    Specified by:
    
    getLogger in class AbstractDatabaseConnection
    
    Returns:
    
    Logger