datafu.pig.hash.MD5Base64.java Source code

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Here is the source code for datafu.pig.hash.MD5Base64.java

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/*
 * Copyright 2010 LinkedIn, 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 datafu.pig.hash;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import org.apache.commons.codec.binary.Base64;

import datafu.pig.util.SimpleEvalFunc;

/**
 * Computes the MD5 value of a string and outputs it in Base64 encoding.
 */
public class MD5Base64 extends SimpleEvalFunc<String> {
    private final MessageDigest md5er;

    public MD5Base64() {
        try {
            md5er = MessageDigest.getInstance("md5");
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }
    }

    public String call(String val) {
        return new String(Base64.encodeBase64(md5er.digest(val.getBytes())));
    }
}