Github user ashish-m-yh commented on a diff in the pull request:
https://github.com/apache/metamodel/pull/19#discussion_r29239910
--- Diff: solr/src/main/java/org/apache/metamodel/solr/SolrDataContext.java
---
@@ -0,0 +1,403 @@
+/**
+ * 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.metamodel.solr;
+
+import java.io.InputStreamReader;
+import java.io.IOException;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.http.HttpResponse;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.DefaultHttpClient;
+import org.apache.metamodel.DataContext;
+import org.apache.metamodel.MetaModelException;
+import org.apache.metamodel.query.Query;
+import org.apache.metamodel.QueryPostprocessDataContext;
+import org.apache.metamodel.data.DataSet;
+import org.apache.metamodel.data.DataSetHeader;
+import org.apache.metamodel.data.Row;
+import org.apache.metamodel.data.SimpleDataSetHeader;
+import org.apache.metamodel.query.FilterClause;
+import org.apache.metamodel.query.FilterItem;
+import org.apache.metamodel.query.GroupByItem;
+import org.apache.metamodel.query.OrderByItem;
+import org.apache.metamodel.query.SelectItem;
+import org.apache.metamodel.query.LogicalOperator;
+import org.apache.metamodel.query.OperatorType;
+import org.apache.metamodel.query.FunctionType;
+import org.apache.metamodel.schema.Column;
+import org.apache.metamodel.schema.ColumnType;
+import org.apache.metamodel.schema.MutableColumn;
+import org.apache.metamodel.schema.MutableSchema;
+import org.apache.metamodel.schema.MutableTable;
+import org.apache.metamodel.schema.Schema;
+import org.apache.metamodel.schema.Table;
+import org.apache.metamodel.util.SimpleTableDef;
+import org.apache.solr.client.solrj.SolrQuery;
+import org.apache.solr.client.solrj.SolrQuery.ORDER;
+import org.apache.solr.client.solrj.SolrServerException;
+import org.apache.solr.client.solrj.impl.HttpSolrServer;
+import org.apache.solr.client.solrj.response.QueryResponse;
+import org.apache.solr.client.solrj.response.FacetField;
+import org.apache.solr.common.SolrDocumentList;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.ObjectReader;
+
+/**
+ * DataContext implementation for ElasticSearch analytics engine.
+ *
+ * ElasticSearch has a data storage structure hierarchy that briefly goes
like
+ * this:
+ * <ul>
+ * <li>Index</li>
+ * <li>Document type (short: Type) (within an index)</li>
+ * <li>Documents (of a particular type)</li>
+ * </ul>
+ *
+ * When instantiating this DataContext, an index name is provided. Within
this
+ * index, each document type is represented as a table.
+ *
+ * This implementation supports either automatic discovery of a schema or
manual
+ * specification of a schema, through the {@link SimpleTableDef} class.
+ */
+
+public class SolrDataContext extends QueryPostprocessDataContext implements
+ DataContext {
+
+ private static final Logger logger = LoggerFactory
+ .getLogger(SolrDataContext.class);
+
+ public static final String FIELD_ID = "id";
--- End diff --
Well, this may be redundant for now, so I removed it.
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