org.apache.hadoop.hive.ql.udf.UDFUnbase64 Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hadoop.hive.ql.udf;
import org.apache.commons.codec.binary.Base64;
import org.apache.hadoop.hive.ql.exec.Description;
import org.apache.hadoop.hive.ql.exec.UDF;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.Text;
@Description(name = "unbase64",
value = "_FUNC_(str) - Convert the argument from a base 64 string to binary")
public class UDFUnbase64 extends UDF {
private final transient BytesWritable result = new BytesWritable();
public BytesWritable evaluate(Text value){
if (value == null) {
return null;
}
byte[] bytes = new byte[value.getLength()];
System.arraycopy(value.getBytes(), 0, bytes, 0, value.getLength());
byte[] decoded = Base64.decodeBase64(bytes);
result.set(decoded, 0, decoded.length);
return result;
}
}