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HBASE-22044 Restore compat for ByteBufferUtils. Also deprecated because it will be IA.Private in HBase 3.0

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(cherry picked from commit f13a897bf7484f0bc512048e7a16f0d8f04cc238)

Signed-off-by: Andrew Purtell <apurtell@apache.org>
This commit is contained in:
Sean Busbey 2019-03-12 23:26:30 -05:00
parent 25defc9293
commit 8cab60cd2b
1 changed files with 24 additions and 0 deletions
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24
hbase-common/src/main/java/org/apache/hadoop/hbase/util/ByteBufferUtils.java
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@ -36,8 +36,10 @@ import sun.nio.ch.DirectBuffer;
/**
* Utility functions for working with byte buffers, such as reading/writing
* variable-length long numbers.
* @deprecated This class will become IA.Private in HBase 3.0. Downstream folks should avoid using it.
*/
@SuppressWarnings("restriction")
@Deprecated
@InterfaceAudience.Public
@InterfaceStability.Evolving
public final class ByteBufferUtils {
@ -650,6 +652,28 @@ public final class ByteBufferUtils {
}
}
/**
* Find length of common prefix of two parts in the buffer
* @param buffer Where parts are located.
* @param offsetLeft Offset of the first part.
* @param offsetRight Offset of the second part.
* @param limit Maximal length of common prefix.
* @return Length of prefix.
*/
public static int findCommonPrefix(ByteBuffer buffer, int offsetLeft,
int offsetRight, int limit) {
int prefix = 0;
for (; prefix < limit; ++prefix) {
if (buffer.get(offsetLeft + prefix) != buffer.get(offsetRight + prefix)) {
break;
}
}
return prefix;
}
/**
* Find length of common prefix in two arrays.
* @param left Array to be compared.