1. /*
  2. * Copyright 2001-2004 The Apache Software Foundation.
  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. * $Id: MultiHashtable.java,v 1.6 2004/02/16 22:26:44 minchau Exp $
  18. */
  19. package com.sun.org.apache.xalan.internal.xsltc.compiler.util;
  20. import java.util.Hashtable;
  21. import java.util.Vector;
  22. /**
  23. * @author Jacek Ambroziak
  24. * @author Santiago Pericas-Geertsen
  25. */
  26. public final class MultiHashtable extends Hashtable {
  27. public Object put(Object key, Object value) {
  28. Vector vector = (Vector)get(key);
  29. if (vector == null)
  30. super.put(key, vector = new Vector());
  31. vector.add(value);
  32. return vector;
  33. }
  34. public Object maps(Object from, Object to) {
  35. if (from == null) return null;
  36. final Vector vector = (Vector) get(from);
  37. if (vector != null) {
  38. final int n = vector.size();
  39. for (int i = 0; i < n; i++) {
  40. final Object item = vector.elementAt(i);
  41. if (item.equals(to)) {
  42. return item;
  43. }
  44. }
  45. }
  46. return null;
  47. }
  48. }