1 /*
2 * Copyright 2007-2008 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package org.gwe.p2elv2.functions;
18
19 import java.util.List;
20
21 import org.gwe.p2elv2.PFunction;
22 import org.gwe.p2elv2.PStatementContext;
23 import org.gwe.p2elv2.PVarValueSpace;
24
25 /**
26 * @author Marco Ruiz
27 * @since Aug 4, 2008
28 */
29 public class PFConst extends PFunction {
30
31 public static final String FUNCTION_NAME = "const";
32
33 public PFConst() { super(FUNCTION_NAME); }
34
35 public PVarValueSpace calculateValues(List<String> params, PStatementContext ctx) {
36 PVarValueSpace result = new PVarValueSpace();
37 for (String param : params) result.add(param);
38 return result;
39 }
40
41 public boolean isSingleValue(List<String> params) {
42 return params.size() < 2;
43 }
44 }
45