Package org.apache.orc.impl

Class DictionaryUtils

java.lang.Object

org.apache.orc.impl.DictionaryUtils

public class DictionaryUtils
extends Object

Method Summary

Modifier and Type	Method	Description
static boolean	equalsInternal(byte[] bytes, int offset, int length, int position, DynamicIntArray keyOffsets, DynamicByteArray byteArray)	Compare a UTF8 string from the byteArray using the offset in index-array.
static ByteBuffer	getTextInternal(int position, DynamicIntArray keyOffsets, DynamicByteArray byteArray)	Return a ByteBuffer containing the data at a certain offset within a DynamicByteArray.
static void	getTextInternal(Text result, int position, DynamicIntArray keyOffsets, DynamicByteArray byteArray)	Obtain the UTF8 string from the byteArray using the offset in index-array.
static int	writeToTextInternal(OutputStream out, int position, DynamicIntArray keyOffsets, DynamicByteArray byteArray)	Write a UTF8 string from the byteArray, using the offset in index-array, into an OutputStream

Methods inherited from class java.lang.Object

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

Method Details

getTextInternal

public static void getTextInternal(Text result,
 int position,
 DynamicIntArray keyOffsets,
 DynamicByteArray byteArray)

Obtain the UTF8 string from the byteArray using the offset in index-array.

Parameters:

result - Container for the UTF8 String.

position - position in the keyOffsets

keyOffsets - starting offset of the key (in byte) in the byte array.

byteArray - storing raw bytes of all keys seen in dictionary

getTextInternal

public static ByteBuffer getTextInternal(int position,
 DynamicIntArray keyOffsets,
 DynamicByteArray byteArray)

Return a ByteBuffer containing the data at a certain offset within a DynamicByteArray.

Parameters:

position - position in the keyOffsets

keyOffsets - starting offset of the key (in byte) in the byte array

byteArray - storing raw bytes of all keys seen in dictionary

Returns:

the number of bytes written to the output stream

writeToTextInternal

public static int writeToTextInternal(OutputStream out,
 int position,
 DynamicIntArray keyOffsets,
 DynamicByteArray byteArray)
                               throws IOException

Write a UTF8 string from the byteArray, using the offset in index-array, into an OutputStream

Parameters:

out - the output stream

position - position in the keyOffsets

keyOffsets - starting offset of the key (in byte) in the byte array

byteArray - storing raw bytes of all keys seen in dictionary

Returns:

the number of bytes written to the output stream

Throws:

IOException - if an I/O error occurs

equalsInternal

public static boolean equalsInternal(byte[] bytes,
 int offset,
 int length,
 int position,
 DynamicIntArray keyOffsets,
 DynamicByteArray byteArray)

Compare a UTF8 string from the byteArray using the offset in index-array.

Parameters:

bytes - an array containing bytes to search for

offset - the offset in the array

length - the number of bytes to search for

position - position in the keyOffsets

keyOffsets - starting offset of the key (in byte) in the byte array

byteArray - storing raw bytes of all key seen in dictionary

Returns:

true if the text is equal to the value within the byteArray; false otherwise