[jira] [Resolved] (SYSTEMML-651) Fix scalar input support for JMLC

["Deron Eriksson (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SYSTEMML-651?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Deron Eriksson resolved SYSTEMML-651.
-------------------------------------
    Resolution: Fixed

Fixed by [PR129|https://github.com/apache/incubator-systemml/pull/129].

> Fix scalar input support for JMLC
> ---------------------------------
>
>                 Key: SYSTEMML-651
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-651
>             Project: SystemML
>          Issue Type: Bug
>          Components: APIs
>            Reporter: Deron Eriksson
>            Assignee: Deron Eriksson
>            Priority: Minor
>
> Currently scalar input variables via JMLC do not work. 
> Sample DML (matrix input, scalar input, and a matrix output):
> {code}
> inMatrix = read("./tmp/inMatrix", rows=-1, cols=-1);
> print('inMatrix: ' + nrow(inMatrix) + 'x' + ncol(inMatrix));
> inScalar = read("./tmp/inScalar", data_type="scalar", value_type="int");
> print('inScalar: ' + inScalar);
> outMatrix = matrix("1 2 3 0", rows=2, cols=2);
> print('outMatrix: ' + nrow(outMatrix) + 'x' + ncol(outMatrix));
> write(outMatrix, "./tmp", format="text");
> {code}
> JMLC code:
> {code}
> Connection conn = new Connection();
> String dml = conn.readScript("scalar-test.dml");
> PreparedScript script = conn.prepareScript(dml, new String[] { "inMatrix", "inScalar" }, new String[] { "outMatrix" }, false);
> double[][] inMatrix = matrix(2, 2, new double[] { 1, 2, 3, 4 });
> int inScalar = 5;
> script.setMatrix("inMatrix", inMatrix);
> script.setScalar("inScalar", inScalar);
> ResultVariables results = script.executeScript();
> double[][] result = results.getMatrix("outMatrix");
> {code}
> Generates the following error:
> {code}
> Exception in thread "main" org.apache.sysml.runtime.DMLRuntimeException: org.apache.sysml.runtime.DMLRuntimeException: ERROR: Runtime error in program block generated from statement block between lines 1 and 9 -- Error evaluating instruction: CP°read°_Var4·SCALAR·INT·false°./tmp/inScalar·SCALAR·STRING·true
> 	at org.apache.sysml.runtime.controlprogram.Program.execute(Program.java:152)
> 	at org.apache.sysml.api.jmlc.PreparedScript.executeScript(PreparedScript.java:390)
> 	at org.apache.sysml.JMLCExampleScalar.main(JMLCExampleScalar.java:26)
> Caused by: org.apache.sysml.runtime.DMLRuntimeException: ERROR: Runtime error in program block generated from statement block between lines 1 and 9 -- Error evaluating instruction: CP°read°_Var4·SCALAR·INT·false°./tmp/inScalar·SCALAR·STRING·true
> 	at org.apache.sysml.runtime.controlprogram.ProgramBlock.executeSingleInstruction(ProgramBlock.java:333)
> 	at org.apache.sysml.runtime.controlprogram.ProgramBlock.executeInstructions(ProgramBlock.java:222)
> 	at org.apache.sysml.runtime.controlprogram.ProgramBlock.execute(ProgramBlock.java:166)
> 	at org.apache.sysml.runtime.controlprogram.Program.execute(Program.java:145)
> 	... 2 more
> Caused by: org.apache.sysml.runtime.DMLRuntimeException: java.io.FileNotFoundException: File tmp/inScalar does not exist
> {code}
> The matrix input and output work fine.



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