com.datastax.driver.core.MD5Digest Maven / Gradle / Ivy
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/*
* Copyright DataStax, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.datastax.driver.core;
import com.datastax.driver.core.utils.Bytes;
import java.util.Arrays;
/**
* The result of the computation of an MD5 digest.
*
* A MD5 is really just a byte[] but arrays are a no go as map keys. We could wrap it in a
* ByteBuffer but: 1. MD5Digest is a more explicit name than ByteBuffer to represent a md5. 2. Using
* our own class allows to use our FastByteComparison for equals.
*/
class MD5Digest {
public final byte[] bytes;
private MD5Digest(byte[] bytes) {
this.bytes = bytes;
}
public static MD5Digest wrap(byte[] digest) {
return new MD5Digest(digest);
}
@Override
public final int hashCode() {
return Arrays.hashCode(bytes);
}
@Override
public final boolean equals(Object o) {
if (!(o instanceof MD5Digest)) return false;
MD5Digest that = (MD5Digest) o;
// handles nulls properly
return Arrays.equals(this.bytes, that.bytes);
}
@Override
public String toString() {
return Bytes.toHexString(bytes);
}
}