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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.hadoop.hbase.hbql.statement.args;
22  
23  import org.apache.expreval.expr.node.GenericValue;
24  import org.apache.hadoop.hbase.client.Scan;
25  import org.apache.hadoop.hbase.hbql.client.HBqlException;
26  
27  public class ScannerCacheArgs extends SelectStatementArgs {
28  
29      public ScannerCacheArgs(final GenericValue val) {
30          super(ArgType.SCANNERCACHE, val);
31      }
32  
33      private int getValue() throws HBqlException {
34          return ((Number)this.evaluateConstant(0, false)).intValue();
35      }
36  
37      public String asString() {
38          return "SCANNER_CACHE_SIZE " + this.getGenericValue(0).asString();
39      }
40  
41      public void setScannerCacheSize(final Scan scan) throws HBqlException {
42          final int val = this.getValue();
43          scan.setCaching(val);
44      }
45  }