SOLR-11019: Add addAll Stream Evaluator

solr/core/src/java/org/apache/solr/handler/StreamHandler.java

@@ -216,6 +216,7 @@ public class StreamHandler extends RequestHandlerBase implements SolrCoreAware,
         .withFunctionName("rev", ReverseEvaluator.class)
         .withFunctionName("scale", ScaleEvaluator.class)
         .withFunctionName("sequence", SequenceEvaluator.class)
+        .withFunctionName("addAll", AddAllEvaluator.class)
 
         
         // Boolean Stream Evaluators

solr/solrj/src/java/org/apache/solr/client/solrj/io/eval/AddAllEvaluator.java

@@ -0,0 +1,69 @@
+/*
+ * 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.eval;
+
+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.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 AddAllEvaluator extends ComplexEvaluator implements Expressible {
+
+  private static final long serialVersionUID = 1;
+
+  public AddAllEvaluator(StreamExpression expression, StreamFactory factory) throws IOException {
+    super(expression, factory);
+
+    if(subEvaluators.size() == 0) {
+      throw new IOException("addAll evaluator expects atleast one array parameter");
+    }
+  }
+
+  public List<Number> evaluate(Tuple tuple) throws IOException {
+
+    List<Number> all = new ArrayList();
+    for(StreamEvaluator subEvaluator : subEvaluators) {
+      List<Number> numbers = (List<Number>)subEvaluator.evaluate(tuple);
+      all.addAll(numbers);
+    }
+
+    return all;
+  }
+
+  @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());
+  }
+}

solr/solrj/src/test/org/apache/solr/client/solrj/io/stream/StreamExpressionTest.java

@@ -5995,6 +5995,32 @@ public class StreamExpressionTest extends SolrCloudTestCase {
     assertTrue(out.get(5).doubleValue() == 500.23D);
   }
 
+
+  @Test
+  public void testAddAll() throws Exception {
+    String cexpr = "addAll(array(1, 2, 3), array(4.5, 5.5, 6.5), array(7,8,9))";
+    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> out = (List<Number>)tuples.get(0).get("return-value");
+    assertTrue(out.size() == 9);
+    assertTrue(out.get(0).intValue() == 1);
+    assertTrue(out.get(1).intValue() == 2);
+    assertTrue(out.get(2).intValue() == 3);
+    assertTrue(out.get(3).doubleValue() == 4.5D);
+    assertTrue(out.get(4).doubleValue() == 5.5D);
+    assertTrue(out.get(5).doubleValue() == 6.5D);
+    assertTrue(out.get(6).intValue() == 7);
+    assertTrue(out.get(7).intValue() == 8);
+    assertTrue(out.get(8).intValue() == 9);
+  }
+
   @Test
   public void testAnova() throws Exception {
     String cexpr = "anova(array(1,2,3,5,4,6), array(5,2,3,5,4,6), array(1,2,7,5,4,6))";