01 /*
02 * SPDX-License-Identifier: Apache-2.0
03 *
04 * Copyright 2008-2017 the original author or authors.
05 *
06 * Licensed under the Apache License, Version 2.0 (the "License");
07 * you may not use this file except in compliance with the License.
08 * You may obtain a copy of the License at
09 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package org.codehaus.griffon.runtime.util;
19
20 import griffon.core.injection.Injector;
21 import griffon.exceptions.InstanceNotFoundException;
22 import griffon.util.Instantiator;
23
24 import javax.annotation.Nonnull;
25 import javax.annotation.PostConstruct;
26 import javax.inject.Inject;
27 import javax.inject.Provider;
28
29 import static griffon.util.GriffonClassUtils.invokeAnnotatedMethod;
30 import static java.util.Objects.requireNonNull;
31
32 /**
33 * @author Andres Almiray
34 * @since 2.10.0
35 */
36 public class DefaultInstantiator implements Instantiator {
37 private final Provider<Injector> injector;
38
39 @Inject
40 public DefaultInstantiator(@Nonnull Provider<Injector> injector) {
41 this.injector = requireNonNull(injector, "Argument 'injector' must not be null");
42 }
43
44 @Override
45 public <T> T instantiate(@Nonnull Class<? extends T> klass) {
46 Injector injector = this.injector.get();
47
48 if (injector != null) {
49 try {
50 return (T) injector.getInstance(klass);
51 } catch (InstanceNotFoundException e) {
52 return newInstanceFromClass(klass);
53 }
54 } else {
55 return newInstanceFromClass(klass);
56 }
57 }
58
59 @Nonnull
60 protected <T> T newInstanceFromClass(@Nonnull Class<? extends T> klass) {
61 try {
62 T instance = klass.newInstance();
63 Injector injector = this.injector.get();
64 if (injector != null) {
65 injector.injectMembers(instance);
66 invokeAnnotatedMethod(instance, PostConstruct.class);
67 }
68 return instance;
69 } catch (InstantiationException | IllegalAccessException e) {
70 throw new IllegalStateException(e);
71 }
72 }
73 }
|