1 /*
2 * Copyright (c) 2010. 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 }