77 lines
2.8 KiB
Java
77 lines
2.8 KiB
Java
/*
|
|
* Copyright (C) 2016 Gson Authors
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package com.google.gson.typeadapters;
|
|
|
|
import java.io.IOException;
|
|
import java.lang.reflect.InvocationTargetException;
|
|
import java.lang.reflect.Method;
|
|
|
|
import javax.annotation.PostConstruct;
|
|
|
|
import com.google.gson.Gson;
|
|
import com.google.gson.TypeAdapter;
|
|
import com.google.gson.TypeAdapterFactory;
|
|
import com.google.gson.reflect.TypeToken;
|
|
import com.google.gson.stream.JsonReader;
|
|
import com.google.gson.stream.JsonWriter;
|
|
|
|
public class PostConstructAdapterFactory implements TypeAdapterFactory {
|
|
// copied from https://gist.github.com/swankjesse/20df26adaf639ed7fd160f145a0b661a
|
|
@Override
|
|
public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
|
|
for (Class<?> t = type.getRawType(); (t != Object.class) && (t.getSuperclass() != null); t = t.getSuperclass()) {
|
|
for (Method m : t.getDeclaredMethods()) {
|
|
if (m.isAnnotationPresent(PostConstruct.class)) {
|
|
m.setAccessible(true);
|
|
TypeAdapter<T> delegate = gson.getDelegateAdapter(this, type);
|
|
return new PostConstructAdapter<>(delegate, m);
|
|
}
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
final static class PostConstructAdapter<T> extends TypeAdapter<T> {
|
|
private final TypeAdapter<T> delegate;
|
|
private final Method method;
|
|
|
|
public PostConstructAdapter(TypeAdapter<T> delegate, Method method) {
|
|
this.delegate = delegate;
|
|
this.method = method;
|
|
}
|
|
|
|
@Override public T read(JsonReader in) throws IOException {
|
|
T result = delegate.read(in);
|
|
if (result != null) {
|
|
try {
|
|
method.invoke(result);
|
|
} catch (IllegalAccessException e) {
|
|
throw new AssertionError();
|
|
} catch (InvocationTargetException e) {
|
|
if (e.getCause() instanceof RuntimeException) throw (RuntimeException) e.getCause();
|
|
throw new RuntimeException(e.getCause());
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
@Override public void write(JsonWriter out, T value) throws IOException {
|
|
delegate.write(out, value);
|
|
}
|
|
}
|
|
}
|