Package org.geotools.data

Class MaxFeatureReader<T extends FeatureType,F extends Feature>

Object

MaxFeatureReader<T,F>

All Implemented Interfaces:

Closeable, AutoCloseable, DelegatingFeatureReader<T,F>, FeatureReader<T,F>

public class MaxFeatureReader<T extends FeatureType,F extends Feature>
extends Object
implements DelegatingFeatureReader<T,F>

Basic support for a FeatureReader that limits itself to the number of features passed in.

Author:

Chris Holmes

Field Summary

Fields

Modifier and Type	Field	Description
protected int	counter
protected FeatureReader<T,F>	featureReader
protected int	maxFeatures

Constructor Summary

Constructors

Constructor	Description
MaxFeatureReader(FeatureReader<T,F> featureReader, int maxFeatures)	Creates a new instance of MaxFeatureReader

Method Summary

Modifier and Type	Method	Description
void	close()	Release the underlying resources associated with this stream.
FeatureReader<T,F>	getDelegate()
T	getFeatureType()	Return the FeatureType this reader has been configured to create.
boolean	hasNext()	Query whether this FeatureReader has another Feature.
F	next()	Reads the next Feature in the FeatureReader.

Methods inherited from class Object

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

Field Detail

featureReader

protected final FeatureReader<T extends FeatureType,F extends Feature> featureReader

maxFeatures

protected final int maxFeatures

counter

protected int counter

Constructor Detail

MaxFeatureReader

public MaxFeatureReader(FeatureReader<T,F> featureReader,
                        int maxFeatures)

Creates a new instance of MaxFeatureReader

Parameters:

featureReader - FeatureReader being maxed

Method Detail

getDelegate

public FeatureReader<T,F> getDelegate()

Specified by:

getDelegate in interface DelegatingFeatureReader<T extends FeatureType,F extends Feature>

Returns:

The delegate feature reader.

next

public F next()
       throws IOException,
              IllegalAttributeException,
              NoSuchElementException

Description copied from interface: FeatureReader

Reads the next Feature in the FeatureReader.

Specified by:

next in interface FeatureReader<T extends FeatureType,F extends Feature>

Returns:

The next feature in the reader.

Throws:

IOException - If an error occurs reading the Feature.

NoSuchElementException - If there are no more Features in the Reader.

IllegalAttributeException

close

public void close()
           throws IOException

Description copied from interface: FeatureReader

Release the underlying resources associated with this stream.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface FeatureReader<T extends FeatureType,F extends Feature>

Throws:

IOException - if an I/O error occurs

getFeatureType

public T getFeatureType()

Description copied from interface: FeatureReader

Return the FeatureType this reader has been configured to create.

Specified by:

getFeatureType in interface FeatureReader<T extends FeatureType,F extends Feature>

Returns:

the FeatureType of the Features this FeatureReader will create.

hasNext

public boolean hasNext()
                throws IOException

Description copied from interface: FeatureReader

Query whether this FeatureReader has another Feature.

Specified by:

hasNext in interface FeatureReader<T extends FeatureType,F extends Feature>

Returns:

true if the featureReader has not passed the max and still has more features.

Throws:

IOException - If the reader we are filtering encounters a problem