Class PureJavaCrc32
java.lang.Object
edu.internet2.middleware.grouperClientExt.org.apache.commons.codec.digest.PureJavaCrc32
- All Implemented Interfaces:
Checksum
A pure-java implementation of the CRC32 checksum that uses
the same polynomial as the built-in native CRC32.
This is to avoid the JNI overhead for certain uses of Checksumming
where many small pieces of data are checksummed in succession.
The current version is ~10x to 1.8x as fast as Sun's native
java.util.zip.CRC32 in Java 1.6
Copied from Hadoop 2.6.3.
The code agrees with the following file in the 2.6.3 tag:
https://git-wip-us.apache.org/repos/asf?p=hadoop.git;a=blob_plain;
f=hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/PureJavaCrc32.java;
hb=2120de588b92b9f22b1cc4188761d6a8c61aa778
This class is Not ThreadSafe
- Since:
- 1.11
- See Also:
-
Constructor Details
-
PureJavaCrc32
public PureJavaCrc32()Create a new PureJavaCrc32 object.
-
-
Method Details
-
getValue
public long getValue() -
reset
public void reset() -
update
public void update(byte[] b, int offset, int len) -
update
public final void update(int b)
-