1/**
2 * Copyright 2006-2013 the original author or authors.
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 */
16package org.objenesis.instantiator.basic;
17
18import java.lang.reflect.Constructor;
19
20import org.objenesis.ObjenesisException;
21import org.objenesis.instantiator.ObjectInstantiator;
22
23/**
24 * Instantiates a class by grabbing the no args constructor and calling Constructor.newInstance().
25 * This can deal with default public constructors, but that's about it.
26 *
27 * @author Joe Walnes
28 * @see ObjectInstantiator
29 */
30public class ConstructorInstantiator implements ObjectInstantiator {
31
32   protected Constructor constructor;
33
34   public ConstructorInstantiator(Class type) {
35      try {
36         constructor = type.getDeclaredConstructor((Class[]) null);
37      }
38      catch(Exception e) {
39         throw new ObjenesisException(e);
40      }
41   }
42
43   public Object newInstance() {
44      try {
45         return constructor.newInstance((Object[]) null);
46      }
47      catch(Exception e) {
48          throw new ObjenesisException(e);
49      }
50   }
51
52}
53