org.geotools.process.feature
Class AbstractFeatureCollectionProcess

Object
  AbstractFeatureCollectionProcess

All Implemented Interfaces:

Process

Direct Known Subclasses:

BufferFeatureCollectionProcess

public abstract class AbstractFeatureCollectionProcess
extends Object
implements Process

Abstract implementation of Process for feature collections.

Subclasses need to implement processFeature(SimpleFeature, Map). This method should perform the operation on the feature, changing any attributes on the feature in as necessary.

Since:

2.6

Author:

Justin Deoliveira, OpenGEO

See Also:

AbstractFeatureCollectionProcessFactory

Constructor Summary

AbstractFeatureCollectionProcess()

Method Summary

Map<String,Object>	execute(Map<String,Object> input, ProgressListener monitor) Execute this process with the provided inputs.
protected abstract void	processFeature(SimpleFeature feature, Map<String,Object> input) Performs an operation on a single feature in the collection.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractFeatureCollectionProcess

public AbstractFeatureCollectionProcess()

Method Detail

execute

public final Map<String,Object> execute(Map<String,Object> input,
                                        ProgressListener monitor)

Description copied from interface: Process

Execute this process with the provided inputs.

Specified by:

execute in interface Process

Parameters:

input - Input parameters for this process

monitor - listener for handling the progress of the process

Returns:

Map of results, (@see ProcessFactory for details), or null if canceled

processFeature

protected abstract void processFeature(SimpleFeature feature,
                                       Map<String,Object> input)
                                throws Exception

Performs an operation on a single feature in the collection.

This method should do some work based on the feature and then set any attributes on the feature as necessary. Example of a simple buffering operation:

 protected void processFeature(SimpleFeature feature, Map input) throws Exception {
    Double buffer = (Double) input.get( BufferFeatureCollectionFactory.BUFFER.key );

    Geometry g = (Geometry) feature.getDefaultGeometry();
    g = g.buffer( buffer );

    feature.setDefaultGeometry( g );
 }
 

Parameters:

feature -

input -

Throws:

Exception