| /** |
| * 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.gora.orientdb.query; |
| |
| import java.io.IOException; |
| import java.util.Iterator; |
| |
| import com.orientechnologies.orient.core.db.ODatabaseSession; |
| import com.orientechnologies.orient.core.record.impl.ODocument; |
| import com.orientechnologies.orient.core.sql.query.OConcurrentLegacyResultSet; |
| import org.apache.gora.orientdb.store.OrientDBStore; |
| import org.apache.gora.persistency.impl.PersistentBase; |
| import org.apache.gora.query.Query; |
| import org.apache.gora.query.impl.ResultBase; |
| import org.apache.gora.store.DataStore; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * OrientDB specific implementation of the {@link org.apache.gora.query.Result} interface. |
| * |
| */ |
| public class OrientDBResult<K, T extends PersistentBase> extends ResultBase<K, T> { |
| |
| /** |
| * Reference to the OrientDB Results set. |
| */ |
| private OConcurrentLegacyResultSet<ODocument> resultSet; |
| private int size; |
| private static final Logger log = LoggerFactory.getLogger(OrientDBResult.class); |
| private Iterator<ODocument> resultSetIterator; |
| |
| public OrientDBResult(DataStore<K, T> dataStore, Query<K, T> query) { |
| super(dataStore, query); |
| } |
| |
| public OrientDBResult(DataStore<K, T> dataStore, |
| Query<K, T> query, |
| OConcurrentLegacyResultSet<ODocument> resultSet) { |
| super(dataStore, query); |
| this.resultSet = resultSet; |
| this.size = resultSet.size(); |
| this.resultSetIterator = resultSet.iterator(); |
| } |
| |
| public OrientDBStore<K, T> getDataStore() { |
| return (OrientDBStore<K, T>) super.getDataStore(); |
| } |
| |
| @Override |
| public float getProgress() throws IOException { |
| if (resultSet == null) { |
| return 0; |
| } else if (size == 0) { |
| return 1; |
| } else { |
| return offset / (float) size; |
| } |
| } |
| |
| @Override |
| public void close() throws IOException { |
| resultSet.clear(); |
| } |
| |
| @Override |
| protected boolean nextInner() throws IOException { |
| ODatabaseSession loadTx = ((OrientDBStore<K, T>) getDataStore()) |
| .getConnectionPool().acquire(); |
| loadTx.activateOnCurrentThread(); |
| try { |
| |
| if (!resultSetIterator.hasNext()) { |
| return false; |
| } |
| |
| ODocument obj = resultSetIterator.next(); |
| key = (K) obj.field("_id"); |
| persistent = ((OrientDBStore<K, T>) getDataStore()) |
| .convertOrientDocToAvroBean(obj, getQuery().getFields()); |
| return persistent != null; |
| } finally { |
| loadTx.close(); |
| } |
| } |
| |
| @Override |
| public int size() { |
| int totalSize = size; |
| int intLimit = (int) this.limit; |
| return intLimit > 0 && totalSize > intLimit ? intLimit : totalSize; |
| } |
| } |