| /** |
| * 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.accumulo.query; |
| |
| import java.io.IOException; |
| import java.util.Iterator; |
| import java.util.Map.Entry; |
| |
| import org.apache.accumulo.core.client.RowIterator; |
| import org.apache.accumulo.core.client.Scanner; |
| import org.apache.accumulo.core.data.ByteSequence; |
| import org.apache.accumulo.core.data.Key; |
| import org.apache.accumulo.core.data.Value; |
| import org.apache.gora.accumulo.store.AccumuloStore; |
| 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; |
| |
| /** |
| * |
| */ |
| public class AccumuloResult<K,T extends Persistent> extends ResultBase<K,T> { |
| |
| private RowIterator iterator; |
| |
| public AccumuloStore<K,T> getDataStore() { |
| return (AccumuloStore<K,T>) super.getDataStore(); |
| } |
| |
| /** |
| * @param dataStore |
| * @param query |
| * @param scanner |
| */ |
| public AccumuloResult(DataStore<K,T> dataStore, Query<K,T> query, Scanner scanner) { |
| super(dataStore, query); |
| |
| // TODO set batch size based on limit, and construct iterator later |
| iterator = new RowIterator(scanner.iterator()); |
| } |
| |
| @Override |
| public float getProgress() throws IOException { |
| // TODO Auto-generated method stub |
| return 0; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| |
| } |
| |
| @Override |
| protected boolean nextInner() throws IOException { |
| |
| if (!iterator.hasNext()) |
| return false; |
| |
| key = null; |
| |
| Iterator<Entry<Key,Value>> nextRow = iterator.next(); |
| ByteSequence row = getDataStore().populate(nextRow, persistent); |
| key = (K) ((AccumuloStore) dataStore).fromBytes(getKeyClass(), row.toArray()); |
| |
| return true; |
| } |
| |
| } |