com.amazonaws.services.glacier

クラス TreeHashGenerator

java.lang.Object

com.amazonaws.services.glacier.TreeHashGenerator

public class TreeHashGenerator
extends java.lang.Object

Utility class for calculating tree hashes.

For more information on tree hashing, see http://en.wikipedia.org/wiki/Hash_tree.

コンストラクタの概要

コンストラクタ

コンストラクタと説明
TreeHashGenerator()

メソッドの概要

メソッド

修飾子とタイプ	メソッドと説明
static java.lang.String	calculateTreeHash(java.io.File file) Calculates a hex encoded binary hash using a tree hashing algorithm for the data in the specified file.
static java.lang.String	calculateTreeHash(java.io.InputStream input) Calculates a hex encoded binary hash using a tree hashing algorithm for the data in the specified input stream.
static java.lang.String	calculateTreeHash(java.util.List<byte[]> checksums) Returns the hex encoded binary tree hash for the individual checksums given.

クラスから継承されたメソッド java.lang.Object

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

コンストラクタの詳細

TreeHashGenerator

public TreeHashGenerator()

メソッドの詳細

calculateTreeHash

public static java.lang.String calculateTreeHash(java.io.File file)
                                          throws AmazonClientException

Calculates a hex encoded binary hash using a tree hashing algorithm for the data in the specified file.

パラメータ:

file - The file containing the data to hash.

戻り値:

The hex encoded binary tree hash for the data in the specified file.

例外:

AmazonClientException - If any problems were encountered reading the data or computing the hash.

calculateTreeHash

public static java.lang.String calculateTreeHash(java.io.InputStream input)
                                          throws AmazonClientException

Calculates a hex encoded binary hash using a tree hashing algorithm for the data in the specified input stream. The method will consume all the inputStream and close it when returned.

パラメータ:

input - The input stream containing the data to hash.

戻り値:

The hex encoded binary tree hash for the data in the specified input stream.

例外:

AmazonClientException - If problems were encountered reading the data or calculating the hash.

calculateTreeHash

public static java.lang.String calculateTreeHash(java.util.List<byte[]> checksums)
                                          throws AmazonClientException

Returns the hex encoded binary tree hash for the individual checksums given. The sums are assumed to have been generated from sequential 1MB portions of a larger file, with the possible exception of the last part, which may be less than a full MB.

戻り値:

The combined hex encoded binary tree hash for the individual checksums specified.

例外:

AmazonClientException - If problems were encountered reading the data or calculating the hash.