TransformerSource (Cytoscape Swing App API (swing-app-api) 3.8.0 API)

Type Parameters:

C - The context type of the elements this Filter operates on.

E - The element type this Filter operates on.
```
public interface TransformerSource<C,E>
```
Provides a sequence of elements from a context. Instances of this interface must be threadsafe.
Module: filter-api
To use this in your app, include the following dependency in your POM:
```
<dependency>
    <groupId>org.cytoscape</groupId>
    <artifactId>filter-api</artifactId>
</dependency>
```
Cytoscape Backwards Compatibility (API Interface): We expect that this interface will be used but not implemented by developers using this interface. As such, we reserve the right to add methods to the interface as part of minor version upgrades. We will not remove methods for any changes other than major version upgrades.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Class<C>`	`getContextType()`	Returns the type of the context object this `TransformerSource` is compatible with.
`int`	`getElementCount(C context)`	Returns the number of elements that could be produced from the given context.
`List<E>`	`getElementList(C context)`	Returns a `List` of elements from the given context.
`Class<E>`	`getElementType()`	Returns the type of the elements this `TransformerSource` is compatible with.

- Method Detail
  - getElementList
```
List<E> getElementList(C context)
```
    Returns a List of elements from the given context.
    
    Parameters:
    
    context - the source of the elements.
    
    Returns:
    
    a List of elements.
  - getContextType
```
Class<C> getContextType()
```
    Returns the type of the context object this TransformerSource is compatible with.
    
    Returns:
    
    the type of the context object.
  - getElementType
```
Class<E> getElementType()
```
    Returns the type of the elements this TransformerSource is compatible with.
    
    Returns:
    
    the type of the elements.
  - getElementCount
```
int getElementCount(C context)
```
    Returns the number of elements that could be produced from the given context.
    
    Parameters:
    
    context - the context whose elements should be counted.
    
    Returns:
    
    the number of elements that could be produced from the given context.