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‎LICENSE‎

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License for the streamsx.eval_predicate toolkit is governed by MRT (MoonRay Technologies, LLC). Usage of this toolkit in other products, projects, solutions and production deployments is controlled by MRT who carries the full ownership of this toolkit.
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‎README.md‎

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# Rule processor for IBM Streams
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## Note from the toolkit author
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This toolkit created by Senthil Nathan is a value differentiator for key customers. He created it on his own initiative and with his original intellectual ideas and not out of any formally managed or funded work by IBM. He did the entire work needed for this toolkit much after IBM divested its Streams product to another company around May/2021 as well as after Oct/2024 when he left IBM. He is now an independent software consultant. His company MoonRay Technologies, LLC owns and has the full rights for this toolkit's future enhancements, usage, reselling and porting it to other event streaming analytics platforms and products. To benefit from the compelling features of this asset, for any enhancements, any need for a new powerful toolkit as well as for creating new streaming data analytics solutions, customers can email senthil@moonraytech.com to reach him. Thank you.
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This toolkit created by Senthil Nathan is a value differentiator for key customers. He created it on his own initiative in his spare time and with his original intellectual ideas and not out of any formally managed or funded work by IBM or its business partners. He did the entire work needed for this toolkit much after IBM divested its Streams product to another company around May/2021 as well as after Oct/2024 when he left IBM. He is now an independent software consultant. His company MoonRay Technologies, LLC has the sole authorship for this toolkit. To benefit from the compelling features of this asset, for any enhancements, any need for a new powerful toolkit as well as for creating new streaming data analytics solutions, customers can email senthil@moonraytech.com to reach him. Thank you.
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## Purpose
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This toolkit offers an improved and a simpler facility for users to let their externally authored business rules to be consumed either statically or dynamically from within the IBM Streams SPL application code and then process (evaluate) them as the data flows through the application pipeline. Such an evaluation returns a true or false result for every rule that gets processed to indicate whether the rule expression criteria is met or not met.

‎com.ibm.streamsx.eval_predicate/CHANGELOG.md‎

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# Changes
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## v1.2.2
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* Feb/09/2026
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* Made more changes in the code header comments.
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## v1.2.1
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* Feb/01/2026
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* Made changes in the code header comments.

‎com.ibm.streamsx.eval_predicate/impl/include/eval_predicate.h‎

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/*
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=================================================
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# Licensed Materials - Property of MRT
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# Copyright MoonRay Technologies, LLC. 2021, 2026
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=================================================
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====================================================
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# Licensed Materials - Property of IBM
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# Copyright IBM Corp. 2021, 2026
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#
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# Full authorship credit: MoonRay Technologies, LLC.
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====================================================
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*/
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/*
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============================================================
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First created on: Mar/05/2021
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Last modified on: Feb/01/2026
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Last modified on: Feb/09/2026
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Author(s): Senthil Nathan senthil@moonraytech.com
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Senthil wrote the code below on his own initiative and with his
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original intellectual ideas and not out of any formally managed or
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funded work by IBM. He did the major work needed for this toolkit
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much after IBM divested its Streams product to another company around
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May/2021 as well as after Oct/2024 when he left IBM to become an
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independent software consultant via MRT. The core logic below and its
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inner workings are derivatives of Senthil's work and effort. It carries
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his full ownership as it is born out of his thinking to help an
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important customer that fetched multi-year revenue for IBM even after
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IBM disowned IBM Streams and even after Senthil was no longer a
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regular emplyee of IBM. By holding full ownership of the entire code
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in this toolkit, he continues to enhance it by investing his own
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time and money. Senthil has plans to make changes to it in the future to
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create other assets centered around the functions and features he
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infused into this toolkit. MRT carries the full rights for all of
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the code below in terms of usage, reselling, and porting it to other
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event streaming analytics platforms and products.
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This toolkit created by Senthil is a value differentiator for key customers.
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He wrote the code below on his own initiative in his spare time and with his
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original intellectual ideas and not out of any formally managed or funded work
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by IBM or its business partners. He did the entire work needed for this toolkit
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much after IBM divested its Streams product to another company around May/2021
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as well as after Oct/2024 when he left IBM. He is now an independent software
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consultant. His company MoonRay Technologies, LLC (MRT) has the sole authorship
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for this toolkit. To benefit from the compelling features of this asset, for any
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enhancements as well as for creating new streaming data analytics solutions by
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using this asset, customers can use the email address shown above to reach him.
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As a sole author for the entire code in this toolkit, Senthil will continue to
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enhance it by investing his own time and money via MRT.
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This toolkit's public GitHub URL:
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https://github.com/IBMStreams/streamsx.eval_predicate
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3) tuple<rstring name,tuple<tuple<tuple<float32 latitude,float32 longitude> geo,tuple<rstring state,rstring zipCode,map<rstring,rstring> officials,list<rstring> businesses> info> location,tuple<float32 temperature,float32 humidity> weather> details,tuple<int32 population,int32 numberOfSchools,int32 numberOfHospitals> stats,int32 rank,list<int32> roadwayNumbers,map<rstring,int32> housingNumbers>
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Following are the examples of expressions that can be sent for evaluation.
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We support either zero or single level or multilevel (nested) parenthesis combination.
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Within a given subexpression, you must use the same logical operators.
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We support either zero or single level or multilevel (nested) parenthesis combination. Within a given subexpression, you must use the same logical operators.
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Zero parenthesis is used in this expression:
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a == "hi" && b contains "xyz" && g[4] > 6.7 && id % 8 == 3

‎com.ibm.streamsx.eval_predicate/info.xml‎

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<info:identity>
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<info:name>com.ibm.streamsx.eval_predicate</info:name>
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<info:description>Toolkit for user defined rule (expression) processing</info:description>
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<info:version>1.2.1</info:version>
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<info:version>1.2.2</info:version>
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<info:requiredProductVersion>4.2.1.6</info:requiredProductVersion>
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</info:identity>
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<info:dependencies/>

‎samples/01_eval_predicate_example/com.ibm.streamsx.eval_predicate.test/EvalPredicateExample.spl‎

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/*
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==================================================
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# Licensed Materials - Property of MRT
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# Copyright MoonRay Technologies, LLC. 2021, 2026
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==================================================
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====================================================
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# Licensed Materials - Property of IBM
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# Copyright IBM Corp. 2021, 2026
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#
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# Full authorship credit: MoonRay Technologies, LLC.
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====================================================
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*/
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/*
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==================================================================
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First created on: Mar/05/2021
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Last modified on: Feb/01/2026
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Last modified on: Feb/09/2026
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Author(s): Senthil Nathan senthil@moonraytech.com
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This is an example application that shows how to use the

‎samples/01_eval_predicate_example/info.xml‎

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<info:identity>
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<info:name>01_eval_predicate_example</info:name>
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<info:description>Simple example that showcases the major eval_predicate features.</info:description>
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<info:version>1.2.1</info:version>
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<info:version>1.2.2</info:version>
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<info:requiredProductVersion>4.2.0.0</info:requiredProductVersion>
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</info:identity>
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<info:dependencies>

‎samples/02_eval_predicate_functional_tests/com.ibm.streamsx.eval_predicate.test/FunctionalTests.spl‎

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/*
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=================================================
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# Licensed Materials - Property of MRT
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# Copyright MoonRay Technologies, LLC. 2021, 2026
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=================================================
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====================================================
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# Licensed Materials - Property of IBM
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# Copyright IBM Corp. 2021, 2026
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#
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# Full authorship credit: MoonRay Technologies, LLC.
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====================================================
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*/
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/*
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==================================================================
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First created on: Mar/28/2021
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Last modified on: Feb/09/2026
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Author(s): Senthil Nathan senthil@moonraytech.com
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This application is meant for doing several hundred

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