/tags/release-0.1-rc2/hive/external/ql/src/java/org/apache/hadoop/hive/ql/optimizer/pcr/PcrOpWalkerCtx.java

 1/**
 2 * Licensed to the Apache Software Foundation (ASF) under one
 3 * or more contributor license agreements.  See the NOTICE file
 4 * distributed with this work for additional information
 5 * regarding copyright ownership.  The ASF licenses this file
 6 * to you under the Apache License, Version 2.0 (the
 7 * "License"); you may not use this file except in compliance
 8 * with the License.  You may obtain a copy of the License at
 9 *
10 *     http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19package org.apache.hadoop.hive.ql.optimizer.pcr;
20
21import java.io.Serializable;
22import java.util.List;
23
24import org.apache.hadoop.hive.ql.exec.FilterOperator;
25import org.apache.hadoop.hive.ql.exec.Operator;
26import org.apache.hadoop.hive.ql.lib.NodeProcessorCtx;
27import org.apache.hadoop.hive.ql.parse.ParseContext;
28
29/**
30 * Context class for operator tree walker for partition condition remover.
31 */
32public class PcrOpWalkerCtx implements NodeProcessorCtx {
33
34  static public class OpToDeleteInfo {
35    private final Operator<? extends Serializable> parent;
36    private final FilterOperator operator;
37
38    public OpToDeleteInfo(Operator<? extends Serializable> parent, FilterOperator operator) {
39      super();
40      this.parent = parent;
41      this.operator = operator;
42    }
43    public Operator<? extends Serializable> getParent() {
44      return parent;
45    }
46    public FilterOperator getOperator() {
47      return operator;
48    }
49  }
50
51  private final ParseContext parseContext;
52  private final List<OpToDeleteInfo> opToRemove;
53
54  /**
55   * Constructor.
56   */
57  public PcrOpWalkerCtx(ParseContext parseContext,
58      List<OpToDeleteInfo> opToRemove) {
59    this.parseContext = parseContext;
60    this.opToRemove = opToRemove;
61  }
62
63  public ParseContext getParseContext() {
64    return parseContext;
65  }
66
67  public List<OpToDeleteInfo> getOpToRemove() {
68    return opToRemove;
69  }
70}