org.apache.lucene.store

Class RAMInputStream

java.lang.Object

org.apache.lucene.store.DataInput

org.apache.lucene.store.IndexInput

org.apache.lucene.store.RAMInputStream

All Implemented Interfaces:

Closeable, Cloneable

public class RAMInputStream
extends IndexInput
implements Cloneable

A memory-resident IndexInput implementation.

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

Constructor Summary

Constructors

Constructor and Description
RAMInputStream(RAMFile f) Deprecated.
RAMInputStream(String name, RAMFile f)

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Closes the stream to further operations.
void	copyBytes(IndexOutput out, long numBytes) Copies numBytes bytes to the given IndexOutput.
long	getFilePointer() Returns the current position in this file, where the next read will occur.
long	length() The number of bytes in the file.
byte	readByte() Reads and returns a single byte.
void	readBytes(byte[] b, int offset, int len) Reads a specified number of bytes into an array at the specified offset.
void	seek(long pos) Sets current position in this file, where the next read will occur.

Methods inherited from class org.apache.lucene.store.IndexInput

skipChars, toString

Methods inherited from class org.apache.lucene.store.DataInput

clone, readBytes, readChars, readInt, readLong, readShort, readString, readStringStringMap, readVInt, readVLong, setModifiedUTF8StringsMode

Methods inherited from class java.lang.Object

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

Constructor Detail

RAMInputStream

@Deprecated
public RAMInputStream(RAMFile f)
               throws IOException

Deprecated.

Please pass String name

Throws:

IOException

RAMInputStream

public RAMInputStream(String name,
              RAMFile f)
               throws IOException

Throws:

IOException

Method Detail

close

public void close()

Description copied from class: IndexInput

Closes the stream to further operations.

Specified by:

close in interface Closeable

Specified by:

close in class IndexInput

length

public long length()

Description copied from class: IndexInput

The number of bytes in the file.

Specified by:

length in class IndexInput

readByte

public byte readByte()
              throws IOException

Description copied from class: DataInput

Reads and returns a single byte.

Specified by:

readByte in class DataInput

Throws:

IOException

See Also:

DataOutput.writeByte(byte)

readBytes

public void readBytes(byte[] b,
             int offset,
             int len)
               throws IOException

Description copied from class: DataInput

Reads a specified number of bytes into an array at the specified offset.

Specified by:

readBytes in class DataInput

Parameters:

b - the array to read bytes into

offset - the offset in the array to start storing bytes

len - the number of bytes to read

Throws:

IOException

See Also:

DataOutput.writeBytes(byte[],int)

copyBytes

public void copyBytes(IndexOutput out,
             long numBytes)
               throws IOException

Description copied from class: IndexInput

Copies numBytes bytes to the given IndexOutput.

NOTE: this method uses an intermediate buffer to copy the bytes. Consider overriding it in your implementation, if you can make a better, optimized copy.

NOTE ensure that there are enough bytes in the input to copy to output. Otherwise, different exceptions may be thrown, depending on the implementation.

Overrides:

copyBytes in class IndexInput

Throws:

IOException

getFilePointer

public long getFilePointer()

Description copied from class: IndexInput

Returns the current position in this file, where the next read will occur.

Specified by:

getFilePointer in class IndexInput

See Also:

IndexInput.seek(long)

seek

public void seek(long pos)
          throws IOException

Description copied from class: IndexInput

Sets current position in this file, where the next read will occur.

Specified by:

seek in class IndexInput

Throws:

IOException

See Also:

IndexInput.getFilePointer()