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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (NIFI-5449) RecordPath Language should allow base64 encode and decode
Date Mon, 03 Sep 2018 16:08:00 GMT

    [ https://issues.apache.org/jira/browse/NIFI-5449?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16602306#comment-16602306
] 

ASF GitHub Bot commented on NIFI-5449:
--------------------------------------

Github user dalibor-frivaldsky commented on a diff in the pull request:

    https://github.com/apache/nifi/pull/2920#discussion_r214729568
  
    --- Diff: nifi-commons/nifi-record-path/src/main/java/org/apache/nifi/record/path/functions/Base64Encode.java
---
    @@ -0,0 +1,58 @@
    +/*
    + * 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.nifi.record.path.functions;
    +
    +import org.apache.nifi.record.path.FieldValue;
    +import org.apache.nifi.record.path.RecordPathEvaluationContext;
    +import org.apache.nifi.record.path.StandardFieldValue;
    +import org.apache.nifi.record.path.paths.RecordPathSegment;
    +
    +import java.io.UnsupportedEncodingException;
    +import java.util.Base64;
    +import java.util.stream.Stream;
    +
    +public class Base64Encode extends RecordPathSegment {
    +    private final RecordPathSegment recordPath;
    +
    +    public Base64Encode(final RecordPathSegment recordPath, final boolean absolute) {
    +        super("base64Encode", null, absolute);
    +        this.recordPath = recordPath;
    +    }
    +
    +    @Override
    +    public Stream<FieldValue> evaluate(final RecordPathEvaluationContext context)
{
    +        final Stream<FieldValue> fieldValues = recordPath.evaluate(context);
    +        return fieldValues.filter(fv -> fv.getValue() != null)
    +                .map(fv -> {
    +
    +                    Object value = fv.getValue();
    +                    if (value instanceof String) {
    +                        try {
    +                            return new StandardFieldValue(Base64.getEncoder().encodeToString(value.toString().getBytes("UTF-8")),
fv.getField(), fv.getParent().orElse(null));
    +                        } catch (final UnsupportedEncodingException e) {
    +                            return null;    // won't happen.
    +                        }
    +                    } else if (value instanceof byte[]) {
    --- End diff --
    
    @mattyb149  Is there anyone else other than @markap14 that can provide the answer here?
If this patch is appropriate, it is unfortunate to see it become stale.


> RecordPath Language should allow base64 encode and decode
> ---------------------------------------------------------
>
>                 Key: NIFI-5449
>                 URL: https://issues.apache.org/jira/browse/NIFI-5449
>             Project: Apache NiFi
>          Issue Type: Improvement
>            Reporter: Dalibor Frívaldský
>            Assignee: Matt Burgess
>            Priority: Minor
>
> Currently there is no way to encode/decode a record field using base64 encoder/decoder.
Without this functionality it is, for example, impossible to store data into databases that
require base64 representation of varbinary values (e.g. Apache Phoenix).



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