Apache Avro 1.11.3 · org.apache.avro.file.DataFileReader12

Field Summary

Modifier and Type	Field and Description
private long	blockCount
private long	blockStart
private static final String	CODEC
private static final long	FOOTER_BLOCK
private DataFileReader.SeekableInputStream	in
pack-priv static final byte[]	MAGIC
private Map<String, byte[]>	meta
private static final String	NULL_CODEC
private D	peek
private DatumReader<D>	reader
private static final String	SCHEMA
private Schema	schema
private static final String	SYNC
private byte[]	sync
private static final int	SYNC_SIZE
private byte[]	syncBuffer
private static final byte	VERSION
private BinaryDecoder	vin

Constructor Summary

Access	Constructor and Description
public	DataFileReader12(SeekableInput sin, DatumReader<D> reader) Construct a reader for a file.

Method Summary

Modifier and Type	Method and Description
public synchronized void	close() Implements java.io.Closeable.close. Close this reader.
public synchronized byte[]	getMeta(String key) Return the value of a metadata property.
public synchronized long	getMetaLong(String key) Return the value of a metadata property.
public synchronized String	getMetaString(String key) Return the value of a metadata property.
public Schema	getSchema() Implements org.apache.avro.file.FileReader.getSchema. Return the schema used in this file.
public boolean	hasNext() Implements java.util.Iterator.hasNext. Returns `true` if the iteration has more elements.
public Iterator<D>	iterator() Implements java.lang.Iterable.iterator. Returns an iterator over elements of type `T`.
public D	next() Implements java.util.Iterator.next. Returns the next element in the iteration.
public synchronized D	next(D an instance to reuse. reuse) Implements org.apache.avro.file.FileReader.next. Return the next datum in the file.
public boolean	pastSync(long position) Implements org.apache.avro.file.FileReader.pastSync. Return true if past the next synchronization point after a position.
public void	remove() Overrides default java.util.Iterator.remove. Removes from the underlying collection the last element returned by this iterator (optional operation).
public synchronized void	seek(long position) Move to the specified synchronization point, as returned by `DataFileWriter#sync()`.
private void	skipSync()
public synchronized void	sync(long position) Implements org.apache.avro.file.FileReader.sync. Move to the next synchronization point after a position.
public long	tell() Implements org.apache.avro.file.FileReader.tell. Return the current position in the input.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

blockCount	back to summary
private long blockCount

blockStart	back to summary
private long blockStart

CODEC	back to summary
private static final String CODEC

FOOTER_BLOCK	back to summary
private static final long FOOTER_BLOCK

in	back to summary
private DataFileReader.SeekableInputStream in

MAGIC	back to summary
pack-priv static final byte[] MAGIC

meta	back to summary
private Map<String, byte[]> meta

NULL_CODEC	back to summary
private static final String NULL_CODEC

peek	back to summary
private D peek

reader	back to summary
private DatumReader<D> reader

SCHEMA	back to summary
private static final String SCHEMA

schema	back to summary
private Schema schema

SYNC	back to summary
private static final String SYNC

sync	back to summary
private byte[] sync

SYNC_SIZE	back to summary
private static final int SYNC_SIZE

syncBuffer	back to summary
private byte[] syncBuffer

VERSION	back to summary
private static final byte VERSION

vin	back to summary
private BinaryDecoder vin

Constructor Detail

DataFileReader12	back to summary
public DataFileReader12(SeekableInput sin, DatumReader<D> reader) throws IOException Construct a reader for a file.

Method Detail

close	back to summary
public synchronized void close() throws IOException Implements java.io.Closeable.close. Close this reader. Annotations @Override Exceptions IOException: Doc from java.io.Closeable.close. if an I/O error occurs

back to summary

public synchronized void close() throws IOException

Implements java.io.Closeable.close.

Close this reader.

Annotations

@Override

Exceptions

IOException:

Doc from java.io.Closeable.close.

if an I/O error occurs

getMeta	back to summary
public synchronized byte[] getMeta(String key) Return the value of a metadata property.

getMetaLong	back to summary
public synchronized long getMetaLong(String key) Return the value of a metadata property.

getMetaString	back to summary
public synchronized String getMetaString(String key) Return the value of a metadata property.

getSchema	back to summary
public Schema getSchema() Implements org.apache.avro.file.FileReader.getSchema. Return the schema used in this file. Annotations @Override

getSchema

back to summary

public Schema getSchema()

Implements org.apache.avro.file.FileReader.getSchema.

Return the schema used in this file.

Annotations

@Override

hasNext back to summary

hasNext	back to summary
public boolean hasNext() Implements java.util.Iterator.hasNext. Doc from java.util.Iterator.hasNext. Returns `true` if the iteration has more elements. (In other words, returns `true` if `next` would return an element rather than throwing an exception.) Returns:boolean `true` if the iteration has more elements Annotations @Override

public boolean hasNext()

Implements java.util.Iterator.hasNext.

Doc from java.util.Iterator.hasNext.

Returns true if the iteration has more elements. (In other words, returns true if next would return an element rather than throwing an exception.)

Returns:boolean

true if the iteration has more elements

Annotations

@Override

iterator back to summary

iterator	back to summary
public Iterator<D> iterator() Implements java.lang.Iterable.iterator. Doc from java.lang.Iterable.iterator. Returns an iterator over elements of type `T`. Returns:Iterator<D> an Iterator. Annotations @Override

public Iterator<D> iterator()

Implements java.lang.Iterable.iterator.

Doc from java.lang.Iterable.iterator.

Returns an iterator over elements of type T.

Returns:Iterator<D>

an Iterator.

Annotations

@Override

next	back to summary
public D next() Implements java.util.Iterator.next. Doc from java.util.Iterator.next. Returns the next element in the iteration. Returns:D the next element in the iteration Annotations @Override

back to summary

public D next()

Implements java.util.Iterator.next.

Doc from java.util.Iterator.next.

Returns the next element in the iteration.

Returns:D

the next element in the iteration

Annotations

@Override

next	back to summary
public synchronized D next(D reuse) throws IOException Implements org.apache.avro.file.FileReader.next. Return the next datum in the file. Parameters reuse:D Doc from org.apache.avro.file.FileReader.next. an instance to reuse. Annotations @Override

back to summary

public synchronized D next(D reuse) throws IOException

Implements org.apache.avro.file.FileReader.next.

Return the next datum in the file.

Parameters

reuse:D

Doc from org.apache.avro.file.FileReader.next.

an instance to reuse.

Annotations

@Override

pastSync	back to summary
public boolean pastSync(long position) throws IOException Implements org.apache.avro.file.FileReader.pastSync. Return true if past the next synchronization point after a position. Annotations @Override

pastSync

back to summary

public boolean pastSync(long position) throws IOException

Implements org.apache.avro.file.FileReader.pastSync.

Return true if past the next synchronization point after a position.

Annotations

@Override

remove back to summary

remove	back to summary
public void remove() Overrides default java.util.Iterator.remove. Doc from java.util.Iterator.remove. Removes from the underlying collection the last element returned by this iterator (optional operation). This method can be called only once per call to `next`. The behavior of an iterator is unspecified if the underlying collection is modified while the iteration is in progress in any way other than by calling this method, unless an overriding class has specified a concurrent modification policy. The behavior of an iterator is unspecified if this method is called after a call to the `forEachRemaining` method. Annotations @Override

public void remove()

Overrides default java.util.Iterator.remove.

Doc from java.util.Iterator.remove.

Removes from the underlying collection the last element returned by this iterator (optional operation). This method can be called only once per call to next.

The behavior of an iterator is unspecified if the underlying collection is modified while the iteration is in progress in any way other than by calling this method, unless an overriding class has specified a concurrent modification policy.

The behavior of an iterator is unspecified if this method is called after a call to the forEachRemaining method.

Annotations

@Override

seek	back to summary
public synchronized void seek(long position) throws IOException Move to the specified synchronization point, as returned by `DataFileWriter#sync()`.

skipSync	back to summary
private void skipSync() throws IOException

sync	back to summary
public synchronized void sync(long position) throws IOException Implements org.apache.avro.file.FileReader.sync. Move to the next synchronization point after a position. Annotations @Override

sync

back to summary

public synchronized void sync(long position) throws IOException

Implements org.apache.avro.file.FileReader.sync.

Move to the next synchronization point after a position.

Annotations

@Override

tell	back to summary
public long tell() throws IOException Implements org.apache.avro.file.FileReader.tell. Return the current position in the input. Annotations @Override

tell

back to summary

public long tell() throws IOException

Implements org.apache.avro.file.FileReader.tell.

Return the current position in the input.

Annotations

@Override

public Class DataFileReader12<D>

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail