com.vividsolutions.jump.io

Class BaseFeatureInputStream

java.lang.Object

com.vividsolutions.jump.io.BaseFeatureInputStream

All Implemented Interfaces:

FeatureInputStream

Direct Known Subclasses:

PostgisFeatureInputStream

public abstract class BaseFeatureInputStream
extends java.lang.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 and Description
BaseFeatureInputStream()

Method Summary

Methods

Modifier and Type	Method and 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 java.lang.Object

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

Constructor Detail

BaseFeatureInputStream

public BaseFeatureInputStream()

Method Detail

getFeatureSchema

public abstract FeatureSchema getFeatureSchema()

Specified by:

getFeatureSchema in interface FeatureInputStream

next

public Feature next()
             throws java.lang.Exception

Specified by:

next in interface FeatureInputStream

Throws:

java.lang.Exception

hasNext

public boolean hasNext()
                throws java.lang.Exception

Specified by:

hasNext in interface FeatureInputStream

Throws:

java.lang.Exception

readNext

protected abstract Feature readNext()
                             throws java.lang.Exception

Read the next feature, if any.

Returns:

the next Feature, or null if there is none

Throws:

java.lang.Exception

close

public abstract void close()
                    throws java.lang.Exception

Specified by:

close in interface FeatureInputStream

Throws:

java.lang.Exception