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 Details

### DirectReader

public DirectReader()

## Method Details

### 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.