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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.commons.jexl3.internal;
18  
19  import java.util.HashSet;
20  import java.util.LinkedHashSet;
21  import java.util.Set;
22  
23  import org.apache.commons.jexl3.JexlArithmetic;
24  
25  /**
26   * Helper class to create set literals.
27   */
28  public class SetBuilder implements JexlArithmetic.SetBuilder {
29      /** The set being created. */
30      protected final Set<Object> set;
31  
32      /**
33       * Creates a new builder.
34       * @param size the expected set size
35       */
36      public SetBuilder(final int size) {
37          this(size, false);
38      }
39  
40      /**
41       * Creates a new builder.
42       * @param size the expected set size
43       * @param extended whether the set is extended
44       */
45      public SetBuilder(final int size, final boolean extended) {
46          set = extended? new LinkedHashSet<>(size) : new HashSet<>(size);
47      }
48  
49      @Override
50      public void add(final Object value) {
51          set.add(value);
52      }
53  
54      @Override
55      public Set<?> create() {
56          return set;
57      }
58  }