SOLR-11867: Add indexOf, rowCount and columnCount StreamEvaluators

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

@@ -307,6 +307,9 @@ public class StreamHandler extends RequestHandlerBase implements SolrCoreAware,
         .withFunctionName("setRowLabels", SetRowLabelsEvaluator.class)
         .withFunctionName("knn", KnnEvaluator.class)
         .withFunctionName("getAttributes", GetAttributesEvaluator.class)
+        .withFunctionName("indexOf", IndexOfEvaluator.class)
+        .withFunctionName("columnCount", ColumnCountEvaluator.class)
+        .withFunctionName("rowCount", RowCountEvaluator.class)
 
         // Boolean Stream Evaluators
 

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

@@ -0,0 +1,42 @@
+/*
+ * 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.Locale;
+
+import org.apache.solr.client.solrj.io.stream.expr.StreamExpression;
+import org.apache.solr.client.solrj.io.stream.expr.StreamFactory;
+
+public class ColumnCountEvaluator extends RecursiveObjectEvaluator implements OneValueWorker {
+  private static final long serialVersionUID = 1;
+
+  public ColumnCountEvaluator(StreamExpression expression, StreamFactory factory) throws IOException {
+    super(expression, factory);
+  }
+
+  @Override
+  public Object doWork(Object value) throws IOException {
+    if(!(value instanceof Matrix)){
+      throw new IOException(String.format(Locale.ROOT,"Invalid expression %s - found type %s for value, expecting a Matrix",toExpression(constructingFactory), value.getClass().getSimpleName()));
+    } else {
+      Matrix matrix = (Matrix)value;
+      return matrix.getColumnCount();
+    }
+  }
+}

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

@@ -0,0 +1,51 @@
+/*
+ * 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.Locale;
+import java.util.List;
+
+import org.apache.solr.client.solrj.io.stream.expr.StreamExpression;
+import org.apache.solr.client.solrj.io.stream.expr.StreamFactory;
+
+public class IndexOfEvaluator extends RecursiveObjectEvaluator implements TwoValueWorker {
+  private static final long serialVersionUID = 1;
+
+  public IndexOfEvaluator(StreamExpression expression, StreamFactory factory) throws IOException {
+    super(expression, factory);
+  }
+
+  @Override
+  public Object doWork(Object value1, Object value2) throws IOException {
+    if(!(value1 instanceof List)){
+      throw new IOException(String.format(Locale.ROOT,"Invalid expression %s - found type %s for value, expecting an array",toExpression(constructingFactory), value1.getClass().getSimpleName()));
+    } else {
+      List list = (List)value1;
+      String find = value2.toString().replace("\"","");
+      for(int i=0; i<list.size(); i++) {
+        Object o = list.get(i);
+        if(o.toString().equals(find)) {
+          return i;
+        }
+      }
+
+      return -1;
+    }
+  }
+}

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

@@ -67,6 +67,14 @@ public class Matrix implements Iterable, Attributes {
     return this.data;
   }
 
+  public int getRowCount() {
+    return data.length;
+  }
+
+  public int getColumnCount() {
+    return data[0].length;
+  }
+
   public Iterator iterator() {
     return new MatrixIterator(data);
   }

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

@@ -0,0 +1,42 @@
+/*
+ * 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.Locale;
+
+import org.apache.solr.client.solrj.io.stream.expr.StreamExpression;
+import org.apache.solr.client.solrj.io.stream.expr.StreamFactory;
+
+public class RowCountEvaluator extends RecursiveObjectEvaluator implements OneValueWorker {
+  private static final long serialVersionUID = 1;
+
+  public RowCountEvaluator(StreamExpression expression, StreamFactory factory) throws IOException {
+    super(expression, factory);
+  }
+
+  @Override
+  public Object doWork(Object value) throws IOException {
+    if(!(value instanceof Matrix)){
+      throw new IOException(String.format(Locale.ROOT,"Invalid expression %s - found type %s for value, expecting a Matrix",toExpression(constructingFactory), value.getClass().getSimpleName()));
+    } else {
+      Matrix matrix = (Matrix)value;
+      return matrix.getRowCount();
+    }
+  }
+}

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

@@ -6182,7 +6182,11 @@ public class StreamExpressionTest extends SolrCloudTestCase {
         "               b=rowAt(a, 1)," +
         "               c=colAt(a, 2)," +
         "               d=getColumnLabels(a)," +
-        "               e=topFeatures(a, 1))";
+        "               e=topFeatures(a, 1)," +
+        "               f=rowCount(a)," +
+        "               g=columnCount(a)," +
+        "               h=indexOf(d, \"col2\")," +
+        "               i=indexOf(d, col3))";
     ModifiableSolrParams paramsLoc = new ModifiableSolrParams();
     paramsLoc.set("expr", cexpr);
     paramsLoc.set("qt", "/stream");
@@ -6230,6 +6234,11 @@ public class StreamExpressionTest extends SolrCloudTestCase {
     assertEquals(features.get(1).size(), 1);
     assertEquals(features.get(0).get(0), "col3");
     assertEquals(features.get(1).get(0), "col1");
+
+    assertTrue(tuples.get(0).getLong("f") == 2);
+    assertTrue(tuples.get(0).getLong("g")== 3);
+    assertTrue(tuples.get(0).getLong("h")== 1);
+    assertTrue(tuples.get(0).getLong("i")== 2);
   }