eu.dnetlib.data.hadoop.hdfs

Class SequenceFileIterator<K extends org.apache.hadoop.io.Writable,V extends org.apache.hadoop.io.Writable>

java.lang.Object

com.google.common.collect.UnmodifiableIterator<T>

com.google.common.collect.AbstractIterator<eu.dnetlib.miscutils.collections.Pair<K,V>>

eu.dnetlib.data.hadoop.hdfs.SequenceFileIterator<K,V>

All Implemented Interfaces:

Closeable, AutoCloseable, Iterator<eu.dnetlib.miscutils.collections.Pair<K,V>>

public final class SequenceFileIterator<K extends org.apache.hadoop.io.Writable,V extends org.apache.hadoop.io.Writable>
extends com.google.common.collect.AbstractIterator<eu.dnetlib.miscutils.collections.Pair<K,V>>
implements Closeable

Iterator over a SequenceFile's keys and values, as a Pair containing key and value.

Constructor Summary

Constructors

Constructor and Description
SequenceFileIterator(org.apache.hadoop.fs.Path path, boolean reuseKeyValueInstances, org.apache.hadoop.conf.Configuration conf)

Method Summary

Modifier and Type	Method and Description
void	close()
protected eu.dnetlib.miscutils.collections.Pair<K,V>	computeNext()
Class<K>	getKeyClass()
Class<V>	getValueClass()

Methods inherited from class com.google.common.collect.AbstractIterator

endOfData, hasNext, next, peek

Methods inherited from class com.google.common.collect.UnmodifiableIterator

remove

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Detail

SequenceFileIterator

public SequenceFileIterator(org.apache.hadoop.fs.Path path,
                            boolean reuseKeyValueInstances,
                            org.apache.hadoop.conf.Configuration conf)
                     throws IOException

Throws:

IOException - if path can't be read, or its key or value class can't be instantiated

Method Detail

getKeyClass

public Class<K> getKeyClass()

getValueClass

public Class<V> getValueClass()

close

public void close()

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

computeNext

protected eu.dnetlib.miscutils.collections.Pair<K,V> computeNext()

Specified by:

computeNext in class com.google.common.collect.AbstractIterator<eu.dnetlib.miscutils.collections.Pair<K extends org.apache.hadoop.io.Writable,V extends org.apache.hadoop.io.Writable>>