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From ottobackwards <>
Subject [GitHub] metron pull request #641: METRON-539: added HASH function for stellar.
Date Tue, 11 Jul 2017 01:49:31 GMT
Github user ottobackwards commented on a diff in the pull request:
    --- Diff: metron-stellar/stellar-common/src/main/java/org/apache/metron/stellar/dsl/functions/
    @@ -0,0 +1,85 @@
    + * 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
    + *
    + *
    + *
    + * 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.metron.stellar.dsl.functions;
    +import org.apache.commons.lang3.SerializationUtils;
    +import org.apache.metron.stellar.dsl.BaseStellarFunction;
    +import org.apache.metron.stellar.dsl.Stellar;
    +import java.nio.charset.StandardCharsets;
    +import java.util.List;
    +public class HashFunctions {
    +  @Stellar(
    +    name = "HASH",
    +    description = "Hashes a given value using the given hashing algorithm and returns
a hex encoded string. This function only hashes " +
    +      "strings and values that implement",
    +    params = {
    +      "toHash - value to hash.",
    +      "hashType - A valid string representation of an algorithm supported by",
    +    },
    +    returns = "A hex representation of a hashed value using the given hashing algorithm.
If either argument is " +
    +      "null then null will be returned. If the type of 'toHash' is neither a string nor
of type, " +
    +      "then null is returned."
    +  )
    +  public static class Hash extends BaseStellarFunction {
    --- End diff --
    I have no preference.  I picked the string thinking of the return of the call being for
'information' and display only.  Like from the shell.  I think that we should do the 'get'
no params calls the same though, i'd change to list if that is what makes sense

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