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From tflo...@apache.org
Subject [40/58] [abbrv] lucene-solr:jira/solr-10233: SOLR-10660: Add reverse Stream Evaluator
Date Fri, 12 May 2017 23:39:07 GMT
SOLR-10660: Add reverse Stream Evaluator


Project: http://git-wip-us.apache.org/repos/asf/lucene-solr/repo
Commit: http://git-wip-us.apache.org/repos/asf/lucene-solr/commit/477b7ea6
Tree: http://git-wip-us.apache.org/repos/asf/lucene-solr/tree/477b7ea6
Diff: http://git-wip-us.apache.org/repos/asf/lucene-solr/diff/477b7ea6

Branch: refs/heads/jira/solr-10233
Commit: 477b7ea66e71a47221bbf83f53dcd31636f9c461
Parents: 5a25ef0
Author: Joel Bernstein <jbernste@apache.org>
Authored: Wed May 10 22:56:44 2017 -0400
Committer: Joel Bernstein <jbernste@apache.org>
Committed: Wed May 10 22:59:17 2017 -0400

----------------------------------------------------------------------
 .../org/apache/solr/handler/StreamHandler.java  |  1 +
 .../solrj/io/stream/ReverseEvaluator.java       | 67 ++++++++++++++++++++
 .../solrj/io/stream/StreamExpressionTest.java   | 52 +++++++++++++++
 3 files changed, 120 insertions(+)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/lucene-solr/blob/477b7ea6/solr/core/src/java/org/apache/solr/handler/StreamHandler.java
----------------------------------------------------------------------
diff --git a/solr/core/src/java/org/apache/solr/handler/StreamHandler.java b/solr/core/src/java/org/apache/solr/handler/StreamHandler.java
index 7441fd3..1a99086 100644
--- a/solr/core/src/java/org/apache/solr/handler/StreamHandler.java
+++ b/solr/core/src/java/org/apache/solr/handler/StreamHandler.java
@@ -173,6 +173,7 @@ public class StreamHandler extends RequestHandlerBase implements SolrCoreAware,
       .withFunctionName("cov", CovarianceEvaluator.class)
       .withFunctionName("conv", ConvolutionEvaluator.class)
       .withFunctionName("normalize", NormalizeEvaluator.class)
+      .withFunctionName("rev", ReverseEvaluator.class)
 
       // metrics
          .withFunctionName("min", MinMetric.class)

http://git-wip-us.apache.org/repos/asf/lucene-solr/blob/477b7ea6/solr/solrj/src/java/org/apache/solr/client/solrj/io/stream/ReverseEvaluator.java
----------------------------------------------------------------------
diff --git a/solr/solrj/src/java/org/apache/solr/client/solrj/io/stream/ReverseEvaluator.java
b/solr/solrj/src/java/org/apache/solr/client/solrj/io/stream/ReverseEvaluator.java
new file mode 100644
index 0000000..5518ed0
--- /dev/null
+++ b/solr/solrj/src/java/org/apache/solr/client/solrj/io/stream/ReverseEvaluator.java
@@ -0,0 +1,67 @@
+/*
+ * 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
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.solr.client.solrj.io.stream;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.solr.client.solrj.io.Tuple;
+import org.apache.solr.client.solrj.io.eval.ComplexEvaluator;
+import org.apache.solr.client.solrj.io.eval.StreamEvaluator;
+import org.apache.solr.client.solrj.io.stream.expr.Explanation;
+import org.apache.solr.client.solrj.io.stream.expr.Explanation.ExpressionType;
+import org.apache.solr.client.solrj.io.stream.expr.Expressible;
+import org.apache.solr.client.solrj.io.stream.expr.StreamExpression;
+import org.apache.solr.client.solrj.io.stream.expr.StreamExpressionParameter;
+import org.apache.solr.client.solrj.io.stream.expr.StreamFactory;
+
+public class ReverseEvaluator extends ComplexEvaluator implements Expressible {
+
+  private static final long serialVersionUID = 1;
+
+  public ReverseEvaluator(StreamExpression expression, StreamFactory factory) throws IOException
{
+    super(expression, factory);
+  }
+
+  public List<Number> evaluate(Tuple tuple) throws IOException {
+    StreamEvaluator colEval1 = subEvaluators.get(0);
+
+    List<Number> numbers1 = (List<Number>)colEval1.evaluate(tuple);
+    List<Number> rev = new ArrayList();
+    for(int i=numbers1.size()-1; i>=0; i--) {
+      rev.add(numbers1.get(i));
+    }
+
+    return rev;
+  }
+
+  @Override
+  public StreamExpressionParameter toExpression(StreamFactory factory) throws IOException
{
+    StreamExpression expression = new StreamExpression(factory.getFunctionName(getClass()));
+    return expression;
+  }
+
+  @Override
+  public Explanation toExplanation(StreamFactory factory) throws IOException {
+    return new Explanation(nodeId.toString())
+        .withExpressionType(ExpressionType.EVALUATOR)
+        .withFunctionName(factory.getFunctionName(getClass()))
+        .withImplementingClass(getClass().getName())
+        .withExpression(toExpression(factory).toString());
+  }
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/lucene-solr/blob/477b7ea6/solr/solrj/src/test/org/apache/solr/client/solrj/io/stream/StreamExpressionTest.java
----------------------------------------------------------------------
diff --git a/solr/solrj/src/test/org/apache/solr/client/solrj/io/stream/StreamExpressionTest.java
b/solr/solrj/src/test/org/apache/solr/client/solrj/io/stream/StreamExpressionTest.java
index 25f0925..2594d33 100644
--- a/solr/solrj/src/test/org/apache/solr/client/solrj/io/stream/StreamExpressionTest.java
+++ b/solr/solrj/src/test/org/apache/solr/client/solrj/io/stream/StreamExpressionTest.java
@@ -5300,6 +5300,58 @@ public class StreamExpressionTest extends SolrCloudTestCase {
   }
 
   @Test
+  public void testReverse() throws Exception {
+    UpdateRequest updateRequest = new UpdateRequest();
+
+    int i=0;
+    while(i<50) {
+      updateRequest.add(id, "id_"+(++i),"test_dt", getDateString("2016", "5", "1"), "price_f",
"400.00");
+    }
+
+    while(i<100) {
+      updateRequest.add(id, "id_"+(++i),"test_dt", getDateString("2015", "5", "1"), "price_f",
"300.0");
+    }
+
+    while(i<150) {
+      updateRequest.add(id, "id_"+(++i),"test_dt", getDateString("2014", "5", "1"), "price_f",
"500.0");
+    }
+
+    while(i<250) {
+      updateRequest.add(id, "id_"+(++i),"test_dt", getDateString("2013", "5", "1"), "price_f",
"100.00");
+    }
+
+    updateRequest.commit(cluster.getSolrClient(), COLLECTIONORALIAS);
+
+    String expr = "timeseries("+COLLECTIONORALIAS+", q=\"*:*\", start=\"2013-01-01T01:00:00.000Z\",
" +
+        "end=\"2016-12-01T01:00:00.000Z\", " +
+        "gap=\"+1YEAR\", " +
+        "field=\"test_dt\", " +
+        "count(*), sum(price_f), max(price_f), min(price_f))";
+
+    String cexpr = "let(a="+expr+", c=col(a, max(price_f)), tuple(reverse=rev(c)))";
+
+    ModifiableSolrParams paramsLoc = new ModifiableSolrParams();
+    paramsLoc.set("expr", cexpr);
+    paramsLoc.set("qt", "/stream");
+
+    String url = cluster.getJettySolrRunners().get(0).getBaseUrl().toString()+"/"+COLLECTIONORALIAS;
+    TupleStream solrStream = new SolrStream(url, paramsLoc);
+
+    StreamContext context = new StreamContext();
+    solrStream.setStreamContext(context);
+    List<Tuple> tuples = getTuples(solrStream);
+    assertTrue(tuples.size() == 1);
+    List<Number> reverse = (List<Number>)tuples.get(0).get("reverse");
+    assertTrue(reverse.size() == 4);
+    assertTrue(reverse.get(0).doubleValue() == 400D);
+    assertTrue(reverse.get(1).doubleValue() == 300D);
+    assertTrue(reverse.get(2).doubleValue() == 500D);
+    assertTrue(reverse.get(3).doubleValue() == 100D);
+  }
+
+
+
+  @Test
   public void testConvolution() throws Exception {
     UpdateRequest updateRequest = new UpdateRequest();
 


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