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

java.lang.Object
- elki.datasource.AbstractDatabaseConnection

All Implemented Interfaces:

DatabaseConnection

Direct Known Subclasses:

ArrayAdapterDatabaseConnection, BundleDatabaseConnection, ConcatenateFilesDatabaseConnection, EmptyDatabaseConnection, ExternalIDJoinDatabaseConnection, GeneratorXMLDatabaseConnection, InputStreamDatabaseConnection, LabelJoinDatabaseConnection, PresortedBlindJoinDatabaseConnection, RandomDoubleVectorDatabaseConnection
```
public abstract class AbstractDatabaseConnection
extends java.lang.Object
implements DatabaseConnection
```
Abstract super class for all database connections. AbstractDatabaseConnection already provides the setting of the database according to parameters.

Since:

0.1

Author:

Elke Achtert

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class AbstractDatabaseConnection.Par
Parameterization class.

Field Summary

Fields
Modifier and Type	Field	Description
`protected java.util.List<? extends ObjectFilter>`	`filters`	The filters to invoke
`static java.lang.String`	`LABEL_CONCATENATION`	A sign to separate components of a label.

Constructor Summary

Constructors
Modifier Constructor Description

protected AbstractDatabaseConnection(java.util.List<? extends ObjectFilter> filters)
Constructor.

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`protected abstract Logging`	`getLogger()`	Get the logger for this database connection.
`protected MultipleObjectsBundle`	`invokeBundleFilters(MultipleObjectsBundle bundle)`	Transforms the specified list of objects and their labels into a list of objects and their associations.
`protected BundleStreamSource`	`invokeStreamFilters(BundleStreamSource stream)`	Transforms the specified list of objects and their labels into a list of objects and their associations.

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

Methods inherited from interface elki.datasource.DatabaseConnection
loadData

- Field Detail
  - LABEL_CONCATENATION
```
public static final java.lang.String LABEL_CONCATENATION
```
    A sign to separate components of a label.
    
    See Also:
    
    Constant Field Values
  - filters
```
protected java.util.List<? extends ObjectFilter> filters
```
    The filters to invoke
- Constructor Detail
  - AbstractDatabaseConnection
```
protected AbstractDatabaseConnection(java.util.List<? extends ObjectFilter> filters)
```
    Constructor.
    
    Parameters:
    
    filters - Filters to apply, can be null
- Method Detail
  - invokeBundleFilters
```
protected MultipleObjectsBundle invokeBundleFilters(MultipleObjectsBundle bundle)
```
    Transforms the specified list of objects and their labels into a list of objects and their associations.
    
    Parameters:
    
    bundle - the objects to process
    
    Returns:
    
    processed objects
  - invokeStreamFilters
```
protected BundleStreamSource invokeStreamFilters(BundleStreamSource stream)
```
    Transforms the specified list of objects and their labels into a list of objects and their associations.
    
    Parameters:
    
    stream - the objects to process
    
    Returns:
    
    processed objects
  - getLogger
```
protected abstract Logging getLogger()
```
    Get the logger for this database connection.
    
    Returns:
    
    Logger