Package org.apache.lucene.util.packed

Class DirectReader

java.lang.Object

org.apache.lucene.util.packed.DirectReader

public class DirectReader
extends Object

Retrieves an instance previously written by DirectWriter

Example usage:

   int bitsPerValue = DirectWriter.bitsRequired(100);
   IndexInput in = dir.openInput("packed", IOContext.DEFAULT);
   LongValues values = DirectReader.getInstance(in.randomAccessSlice(start, end), bitsPerValue);
   for (int i = 0; i < numValues; i++) {
     long value = values.get(i);
   }
 

See Also:

DirectWriter

Constructor Summary

Constructors

Constructor	Description
DirectReader()

Method Summary

Modifier and Type	Method	Description
static LongValues	getInstance(RandomAccessInput slice, int bitsPerValue)	Retrieves an instance from the specified slice written decoding bitsPerValue for each value
static LongValues	getInstance(RandomAccessInput slice, int bitsPerValue, long offset)	Retrieves an instance from the specified offset of the given slice decoding bitsPerValue for each value
static LongValues	getMergeInstance(RandomAccessInput slice, int bitsPerValue, long numValues)	Retrieves an instance that is specialized for merges and is typically faster at sequential access but slower at random access.
static LongValues	getMergeInstance(RandomAccessInput slice, int bitsPerValue, long baseOffset, long numValues)	Retrieves an instance that is specialized for merges and is typically faster at sequential access.

Methods inherited from class java.lang.Object

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

Constructor Detail

DirectReader

public DirectReader()

Method Detail

getInstance

public static LongValues getInstance(RandomAccessInput slice,
                                     int bitsPerValue)

Retrieves an instance from the specified slice written decoding bitsPerValue for each value

getInstance

public static LongValues getInstance(RandomAccessInput slice,
                                     int bitsPerValue,
                                     long offset)

Retrieves an instance from the specified offset of the given slice decoding bitsPerValue for each value

getMergeInstance

public static LongValues getMergeInstance(RandomAccessInput slice,
                                          int bitsPerValue,
                                          long numValues)

Retrieves an instance that is specialized for merges and is typically faster at sequential access but slower at random access.

getMergeInstance

public static LongValues getMergeInstance(RandomAccessInput slice,
                                          int bitsPerValue,
                                          long baseOffset,
                                          long numValues)

Retrieves an instance that is specialized for merges and is typically faster at sequential access.