/testability-explorer/src/main/java/com/google/test/metric/method/op/stack/Swap.java

 1/*
 2 * Copyright 2007 Google Inc.
 3 * 
 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 5 * use this file except in compliance with the License. You may obtain a copy of
 6 * 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, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations under
14 * the License.
15 */
16package com.google.test.metric.method.op.stack;
17
18import java.util.List;
19
20import com.google.test.metric.Variable;
21
22public class Swap extends StackOperation {
23
24  public Swap(int lineNumber) {
25    super(lineNumber);
26  }
27
28  @Override
29  public int getOperatorCount() {
30    return 2;
31  }
32
33  @Override
34  public List<Variable> apply(List<Variable> input) {
35    return list(input.get(1), input.get(0));
36  }
37
38  @Override
39  public String toString() {
40    return "swap";
41  }
42}