001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.rest;
019
020import java.io.IOException;
021import java.util.Iterator;
022import org.apache.hadoop.hbase.Cell;
023import org.apache.hadoop.hbase.filter.Filter;
024import org.apache.hadoop.hbase.rest.model.ScannerModel;
025import org.apache.yetus.audience.InterfaceAudience;
026
027@InterfaceAudience.Private
028public abstract class ResultGenerator implements Iterator<Cell> {
029
030  public static ResultGenerator fromRowSpec(final String table, final RowSpec rowspec,
031    final Filter filter, final boolean cacheBlocks) throws IOException {
032    if (rowspec.isSingleRow()) {
033      return new RowResultGenerator(table, rowspec, filter, cacheBlocks);
034    } else {
035      return new ScannerResultGenerator(table, rowspec, filter, cacheBlocks);
036    }
037  }
038
039  public static Filter buildFilter(final String filter) throws Exception {
040    return ScannerModel.buildFilter(filter);
041  }
042
043  public abstract void putBack(Cell kv);
044
045  public abstract void close();
046}