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

http://testability-explorer.googlecode.com/
Java | 49 lines | 25 code | 9 blank | 15 comment | 0 complexity | 914b8022a784c9da834524147874ead7 MD5 | raw file
Possible License(s): Apache-2.0
  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. */
  16. package com.google.test.metric.method.op.stack;
  17. import java.util.LinkedList;
  18. import java.util.List;
  19. import com.google.test.metric.Variable;
  20. public class Duplicate extends StackOperation {
  21. private final int offset;
  22. public Duplicate(int lineNumber, int offset) {
  23. super(lineNumber);
  24. this.offset = offset;
  25. }
  26. @Override
  27. public int getOperatorCount() {
  28. return 1 + offset;
  29. }
  30. @Override
  31. public List<Variable> apply(List<Variable> input) {
  32. LinkedList<Variable> list = new LinkedList<Variable>(input);
  33. list.add(0, input.get(input.size() - 1));
  34. return list;
  35. }
  36. @Override
  37. public String toString() {
  38. return "duplicate" + (offset > 0 ? "_X" + offset : "");
  39. }
  40. }