[jira] [Created] (SOLR-9009) Add Explanations to Streaming Expressions

["Dennis Gove (JIRA)" <ji...@apache.org>]

Dennis Gove created SOLR-9009:
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             Summary: Add Explanations to Streaming Expressions
                 Key: SOLR-9009
                 URL: https://issues.apache.org/jira/browse/SOLR-9009
             Project: Solr
          Issue Type: Improvement
          Components: SolrJ
    Affects Versions: master, 6.1
            Reporter: Dennis Gove
            Assignee: Dennis Gove


Adds the ability to return a Explanation for a streaming expression. The explanation will describe features of an expression including its children. This information can be used by a client to introspect how their expression is interpreted on the server. 

It will be used SOLR-8918 to add Streaming to the admin page.

This does change the interface Expressible to add a new required function which functions similarly to the toExpression(StreamFactory) function. It will return an Explanation object describing that expression.

{code}
public Explanation toExplanation(StreamFactory factory) throws IOException
{code}



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