com.datastax.driver.core.MD5Digest Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of dse-java-driver-core Show documentation

A driver for DataStax Enterprise (DSE) and Apache Cassandra 1.2+ clusters that works exclusively with the Cassandra Query Language version 3 (CQL3) and Cassandra's binary protocol, supporting DSE-specific features such as geospatial types, DSE Graph and DSE authentication.

There is a newer version: 2.4.0

Show newest version

/*
 * Copyright DataStax, Inc.
 *
 * This software can be used solely with DataStax Enterprise. Please consult the license at
 * http://www.datastax.com/terms/datastax-dse-driver-license-terms
 */
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);
    }
}