1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.bcel.util;
18
19 import java.util.HashMap;
20 import java.util.Map;
21
22 import org.apache.bcel.classfile.JavaClass;
23 import org.apache.commons.lang3.ArrayUtils;
24
25 /**
26 * Utility class implementing a (type-safe) set of JavaClass objects. Since JavaClass has no equals() method, the name of the class is used for comparison.
27 *
28 * @see ClassStack
29 */
30 public class ClassSet {
31
32 private final Map<String, JavaClass> map = new HashMap<>();
33
34 public boolean add(final JavaClass clazz) {
35 return map.putIfAbsent(clazz.getClassName(), clazz) != null;
36 }
37
38 public boolean empty() {
39 return map.isEmpty();
40 }
41
42 public String[] getClassNames() {
43 return map.keySet().toArray(ArrayUtils.EMPTY_STRING_ARRAY);
44 }
45
46 public void remove(final JavaClass clazz) {
47 map.remove(clazz.getClassName());
48 }
49
50 public JavaClass[] toArray() {
51 return map.values().toArray(JavaClass.EMPTY_ARRAY);
52 }
53 }