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    1   package org.apache.bcel.util;
    2
    3   /* ====================================================================
    4    * The Apache Software License, Version 1.1
    5    *
    6    * Copyright (c) 2001 The Apache Software Foundation.  All rights
    7    * reserved.
    8    *
    9    * Redistribution and use in source and binary forms, with or without
    10   * modification, are permitted provided that the following conditions
    11   * are met:
    12   *
    13   * 1. Redistributions of source code must retain the above copyright
    14   *    notice, this list of conditions and the following disclaimer.
    15   *
    16   * 2. Redistributions in binary form must reproduce the above copyright
    17   *    notice, this list of conditions and the following disclaimer in
    18   *    the documentation and/or other materials provided with the
    19   *    distribution.
    20   *
    21   * 3. The end-user documentation included with the redistribution,
    22   *    if any, must include the following acknowledgment:
    23   *       "This product includes software developed by the
    24   *        Apache Software Foundation (http://www.apache.org/)."
    25   *    Alternately, this acknowledgment may appear in the software itself,
    26   *    if and wherever such third-party acknowledgments normally appear.
    27   *
    28   * 4. The names "Apache" and "Apache Software Foundation" and
    29   *    "Apache BCEL" must not be used to endorse or promote products
    30   *    derived from this software without prior written permission. For
    31   *    written permission, please contact apache@apache.org.
    32   *
    33   * 5. Products derived from this software may not be called "Apache",
    34   *    "Apache BCEL", nor may "Apache" appear in their name, without
    35   *    prior written permission of the Apache Software Foundation.
    36   *
    37   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
    38   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    39   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    40   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
    41   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    42   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    43   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
    44   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
    45   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
    46   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
    47   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    48   * SUCH DAMAGE.
    49   * ====================================================================
    50   *
    51   * This software consists of voluntary contributions made by many
    52   * individuals on behalf of the Apache Software Foundation.  For more
    53   * information on the Apache Software Foundation, please see
    54   * <http://www.apache.org/>;.
    55   */
    56  import java.util.HashMap;
    57  import java.util.Collection;
    58  import org.apache.bcel.classfile.JavaClass;
    59
    60  /***
    61   * Utility class implementing a (typesafe) set of JavaClass objects.
    62   * Since JavaClass has no equals() method, the name of the class is
    63   * used for comparison.
    64   *
    65   * @version $Id: ClassSet.java,v 1.2 2003/02/13 11:18:23 enver Exp $
    66   * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
    67   * @see ClassStack
    68  */
    69  public class ClassSet implements java.io.Serializable {
    70    private HashMap _map = new HashMap();
    71
    72    public boolean add(JavaClass clazz) {
    73      boolean result = false;
    74
    75      if(!_map.containsKey(clazz.getClassName())) {
    76        result = true;
    77        _map.put(clazz.getClassName(), clazz);
    78      }
    79
    80      return result;
    81    }
    82
    83    public void      remove(JavaClass clazz) { _map.remove(clazz.getClassName()); }
    84    public boolean   empty()                 { return _map.isEmpty(); }
    85
    86    public JavaClass[] toArray() {
    87      Collection values = _map.values();
    88      JavaClass[] classes = new JavaClass[values.size()];
    89      values.toArray(classes);
    90      return classes;
    91    }
    92
    93    public String[] getClassNames() {
    94      return (String[])_map.keySet().toArray(new String[_map.keySet().size()]);
    95    }
    96  }

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