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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GORA-437) Implement CouchDB Datastore
Date Sun, 21 Aug 2016 18:16:20 GMT

    [ https://issues.apache.org/jira/browse/GORA-437?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15429826#comment-15429826
] 

ASF GitHub Bot commented on GORA-437:
-------------------------------------

Github user lewismc commented on a diff in the pull request:

    https://github.com/apache/gora/pull/74#discussion_r75600521
  
    --- Diff: gora-couchdb/src/main/java/org/apache/gora/couchdb/query/CouchDBResult.java
---
    @@ -0,0 +1,85 @@
    +/**
    + * 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
    + * <p>
    + * http://www.apache.org/licenses/LICENSE-2.0
    + * <p>
    + * 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.gora.couchdb.query;
    +
    +import org.apache.gora.couchdb.store.CouchDBStore;
    +import org.apache.gora.persistency.Persistent;
    +import org.apache.gora.query.Query;
    +import org.apache.gora.query.impl.ResultBase;
    +import org.apache.gora.store.DataStore;
    +
    +import java.io.IOException;
    +import java.util.List;
    +import java.util.Map;
    +
    +/**
    + * CouchDB specific implementation of the {@link org.apache.gora.query.Result}
    + * interface.
    + */
    +public class CouchDBResult<K, T extends Persistent> extends ResultBase<K, T>
{
    +
    +  /**
    +   * Result set containing query results
    +   */
    +  private List<Map> result;
    +
    +  protected CouchDBStore dataStore;
    +  int position = 0;
    +
    +  /**
    +   * Constructor for the result set
    +   *
    +   * @param dataStore Data store used
    +   * @param query     Query used
    +   * @param result    Result obtained from querying
    +   */
    +  public CouchDBResult(DataStore<K, T> dataStore, Query<K, T> query, List<Map>
result) {
    +    super(dataStore, query);
    +    this.result = result;
    +    this.dataStore = (CouchDBStore) dataStore;
    +  }
    +
    +  /**
    +   * Gets the next item
    +   */
    +  @Override
    +  protected boolean nextInner() throws IOException {
    +    if (result == null || result.size() <= 0 || position >= result.size()) {
    +      return false;
    +    }
    +    key = (K) result.get(position).get("_id");
    +    persistent = (T) dataStore.newInstance(result.get(position++), query.getFields());
    +    return persistent != null;
    +  }
    +
    +  /**
    +   * Gets the items reading progress
    +   */
    +  @Override
    +  public float getProgress() throws IOException, InterruptedException {
    +    if (result != null && result.size() > 0) {
    +      return (float) position / (float) result.size();
    +    } else {
    +      return 0;
    +    }
    +  }
    +
    +  public List<Map> getResultData() {
    --- End diff --
    
    javadoc


> Implement CouchDB Datastore
> ---------------------------
>
>                 Key: GORA-437
>                 URL: https://issues.apache.org/jira/browse/GORA-437
>             Project: Apache Gora
>          Issue Type: New Feature
>            Reporter: Furkan KAMACI
>            Assignee: cihad g├╝zel
>              Labels: gora-couchdb, gsoc2016, storage
>             Fix For: 0.8
>
>
> Apache CouchDB is a document-oriented NoSQL database that uses JSON to store data, JavaScript
as its query language using MapReduce, and HTTP for an API. It could be nice to support CouchDB
as a datastore at Gora.



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