Examples with StreamExpression org.apache.solr.client.solrj.io.stream.expr.StreamExpression used on opensource projects

Example 6 with StreamExpression

use of org.apache.solr.client.solrj.io.stream.expr.StreamExpression in project lucene-solr by apache.

the class RankStream method toExpression.

private StreamExpression toExpression(StreamFactory factory, boolean includeStreams) throws IOException {
    // function name
    StreamExpression expression = new StreamExpression(factory.getFunctionName(this.getClass()));
    // n
    expression.addParameter(new StreamExpressionNamedParameter("n", Integer.toString(size)));
    if (includeStreams) {
        // stream
        if (stream instanceof Expressible) {
            expression.addParameter(((Expressible) stream).toExpression(factory));
        } else {
            throw new IOException("This RankStream contains a non-expressible TupleStream - it cannot be converted to an expression");
        }
    } else {
        expression.addParameter("<stream>");
    }
    // sort
    expression.addParameter(new StreamExpressionNamedParameter(SORT, comp.toExpression(factory)));
    return expression;
}

Example 7 with StreamExpression

use of org.apache.solr.client.solrj.io.stream.expr.StreamExpression in project lucene-solr by apache.

the class RollupStream method toExpression.

private StreamExpression toExpression(StreamFactory factory, boolean includeStreams) throws IOException {
    // function name
    StreamExpression expression = new StreamExpression(factory.getFunctionName(this.getClass()));
    // stream
    if (includeStreams) {
        expression.addParameter(tupleStream.toExpression(factory));
    } else {
        expression.addParameter("<stream>");
    }
    // over
    StringBuilder overBuilder = new StringBuilder();
    for (Bucket bucket : buckets) {
        if (overBuilder.length() > 0) {
            overBuilder.append(",");
        }
        overBuilder.append(bucket.toString());
    }
    expression.addParameter(new StreamExpressionNamedParameter("over", overBuilder.toString()));
    // metrics
    for (Metric metric : metrics) {
        expression.addParameter(metric.toExpression(factory));
    }
    return expression;
}

Example 8 with StreamExpression

use of org.apache.solr.client.solrj.io.stream.expr.StreamExpression in project lucene-solr by apache.

the class ScoreNodesStream method toExpression.

private StreamExpression toExpression(StreamFactory factory, boolean includeStreams) throws IOException {
    // function name
    StreamExpression expression = new StreamExpression(factory.getFunctionName(this.getClass()));
    // nodeFreqField
    expression.addParameter(new StreamExpressionNamedParameter("termFreq", termFreq));
    if (includeStreams) {
        // stream
        if (stream instanceof Expressible) {
            expression.addParameter(((Expressible) stream).toExpression(factory));
        } else {
            throw new IOException("This ScoreNodesStream contains a non-expressible TupleStream - it cannot be converted to an expression");
        }
    } else {
        expression.addParameter("<stream>");
    }
    return expression;
}

Example 9 with StreamExpression

use of org.apache.solr.client.solrj.io.stream.expr.StreamExpression in project lucene-solr by apache.

the class LetStream method toExpression.

private StreamExpression toExpression(StreamFactory factory, boolean includeStreams) throws IOException {
    // function name
    StreamExpression expression = new StreamExpression(factory.getFunctionName(this.getClass()));
    expression.addParameter(((Expressible) stream).toExpression(factory));
    return expression;
}

Example 10 with StreamExpression

use of org.apache.solr.client.solrj.io.stream.expr.StreamExpression in project lucene-solr by apache.

the class JDBCStream method toExplanation.

@Override
public Explanation toExplanation(StreamFactory factory) throws IOException {
    StreamExplanation explanation = new StreamExplanation(getStreamNodeId().toString());
    explanation.setFunctionName(factory.getFunctionName(this.getClass()));
    explanation.setImplementingClass(this.getClass().getName());
    explanation.setExpressionType(ExpressionType.STREAM_SOURCE);
    StreamExpression expression = (StreamExpression) toExpression(factory);
    explanation.setExpression(expression.toString());
    String driverClassName = this.driverClassName;
    if (null == driverClassName) {
        try {
            driverClassName = DriverManager.getDriver(connectionUrl).getClass().getName();
        } catch (Exception e) {
            driverClassName = String.format(Locale.ROOT, "Failed to find driver for connectionUrl='%s'", connectionUrl);
        }
    }
    // child is a datastore so add it at this point
    StreamExplanation child = new StreamExplanation(getStreamNodeId() + "-datastore");
    child.setFunctionName("jdbc-source");
    child.setImplementingClass(driverClassName);
    child.setExpressionType(ExpressionType.DATASTORE);
    child.setExpression(sqlQuery);
    explanation.addChild(child);
    return explanation;
}