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https://issues.apache.org/jira/browse/NIFI-2950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15629638#comment-15629638
]
ASF GitHub Bot commented on NIFI-2950:
--------------------------------------
Github user olegz commented on a diff in the pull request:
https://github.com/apache/nifi/pull/1161#discussion_r86192691
--- Diff:
nifi-commons/nifi-expression-language/src/main/java/org/apache/nifi/attribute/expression/language/evaluation/functions/FromRadixEvaluator.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.attribute.expression.language.evaluation.functions;
+
+import org.apache.nifi.attribute.expression.language.evaluation.Evaluator;
+import
org.apache.nifi.attribute.expression.language.evaluation.QueryResult;
+import
org.apache.nifi.attribute.expression.language.evaluation.WholeNumberEvaluator;
+import
org.apache.nifi.attribute.expression.language.evaluation.WholeNumberQueryResult;
+
+import java.util.Map;
+
+public class FromRadixEvaluator extends WholeNumberEvaluator {
+
+ private final Evaluator<String> numberEvaluator;
+ private final Evaluator<Long> radixEvaluator;
+
+ public FromRadixEvaluator(final Evaluator<String> subject, final
Evaluator<Long> radixEvaluator) {
+ this.numberEvaluator = subject;
+ this.radixEvaluator = radixEvaluator;
+ }
+
+ @Override
+ public QueryResult<Long> evaluate(final Map<String, String>
attributes) {
+ final String result =
numberEvaluator.evaluate(attributes).getValue();
--- End diff --
Given that this is a public method, consider null check on ```attributes```
to avoid NPE unless this class is not considered to be part of public API.
> Allow literal interpretation of hex numbers as whole numbers in EL
> ------------------------------------------------------------------
>
> Key: NIFI-2950
> URL: https://issues.apache.org/jira/browse/NIFI-2950
> Project: Apache NiFi
> Issue Type: Improvement
> Reporter: Joseph Percivall
> Assignee: Joseph Percivall
> Priority: Minor
>
> Currently in EL you cannot pass hex numbers as a whole number and instead
> only decimals support them. Whole numbers should support being passed in as
> hex too.
> This was brought up by this SO[1] question.
> [1]
> http://stackoverflow.com/questions/40265791/applying-string-manipulations-mathematical-operations-to-the-contents-of-a-flow/40267507#40267507
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