Class BaseFeatureInputStream

java.lang.Object

com.vividsolutions.jump.io.BaseFeatureInputStream

All Implemented Interfaces:

FeatureInputStream

Direct Known Subclasses:

SpatialDatabasesFeatureInputStream

public abstract class BaseFeatureInputStream
extends Object
implements FeatureInputStream

Base class for FeatureInputStreamReaders. Handles the details of buffering the stream of features to allow for lookahead. This allows subclasses to implement the simpler semantics of "return null if no more features". Subclasses need to define readNext and close. They also need to set the featureSchema instance variable.

Constructor Summary

Constructors

Constructor	Description
BaseFeatureInputStream()

Method Summary

Modifier and Type	Method	Description
abstract void	close()
abstract FeatureSchema	getFeatureSchema()
boolean	hasNext()
Feature	next()
protected abstract Feature	readNext()	Read the next feature, if any.

Methods inherited from class Object

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

Constructor Details

BaseFeatureInputStream

public BaseFeatureInputStream()

Method Details

getFeatureSchema

public abstract FeatureSchema getFeatureSchema()

Specified by:

getFeatureSchema in interface FeatureInputStream

next

public Feature next()
             throws Exception

Specified by:

next in interface FeatureInputStream

Throws:

Exception

hasNext

public boolean hasNext()
                throws Exception

Specified by:

hasNext in interface FeatureInputStream

Throws:

Exception

readNext

protected abstract Feature readNext()
                             throws Exception

Read the next feature, if any.

Returns:

the next Feature, or null if there is none

Throws:

Exception - if an exception occured while reading next Feature

close

public abstract void close()
                    throws Exception

Specified by:

close in interface FeatureInputStream

Throws:

Exception