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1   /*
2    * Copyright (c) 2011.  The Apache Software Foundation
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *     http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing, software
15   * distributed under the License is distributed on an "AS IS" BASIS,
16   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17   * See the License for the specific language governing permissions and
18   * limitations under the License.
19   */
20  
21  package org.apache.expreval.expr.node;
22  
23  import org.apache.expreval.client.NullColumnValueException;
24  import org.apache.expreval.client.ResultMissingColumnException;
25  import org.apache.expreval.expr.MultipleExpressionContext;
26  import org.apache.hadoop.hbase.client.Result;
27  import org.apache.hadoop.hbase.filter.Filter;
28  import org.apache.hadoop.hbase.hbql.client.HBqlException;
29  import org.apache.hadoop.hbase.hbql.impl.AggregateValue;
30  import org.apache.hadoop.hbase.hbql.impl.HConnectionImpl;
31  
32  import java.io.Serializable;
33  
34  public interface GenericValue extends Serializable {
35  
36      static final long serialVersionUID = 1L;
37  
38      void setExpressionContext(MultipleExpressionContext context) throws HBqlException;
39  
40      Object getValue(HConnectionImpl connection, Object object) throws HBqlException,
41                                                                        ResultMissingColumnException,
42                                                                        NullColumnValueException;
43  
44      Filter getFilter() throws HBqlException;
45  
46      GenericValue getOptimizedValue() throws HBqlException;
47  
48      Class<? extends GenericValue> validateTypes(GenericValue parentExpr, boolean allowCollections) throws HBqlException;
49  
50      boolean isAConstant();
51  
52      boolean isDefaultKeyword();
53  
54      boolean isAnAggregateValue();
55  
56      void initAggregateValue(AggregateValue aggregateValue) throws HBqlException;
57  
58      void applyResultToAggregateValue(AggregateValue aggregateValue, Result result) throws HBqlException,
59                                                                                            ResultMissingColumnException,
60                                                                                            NullColumnValueException;
61  
62      boolean hasAColumnReference();
63  
64      boolean isAColumnReference();
65  
66      String asString();
67  
68      void reset();
69  }