/*
* Copyright 2016 MongoDB, Inc.
*
* 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 org.mongodb.morphia;
import org.mongodb.morphia.mapping.MappingException;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import static java.lang.String.format;
abstract class AnnotationBuilder<T extends Annotation> implements Annotation {
private final Map<String, Object> values = new HashMap<String, Object>();
AnnotationBuilder() {
for (Method method : annotationType().getDeclaredMethods()) {
values.put(method.getName(), method.getDefaultValue());
}
}
AnnotationBuilder(final T original) {
try {
for (Method method : annotationType().getDeclaredMethods()) {
values.put(method.getName(), method.invoke(original));
}
} catch (Exception e) {
throw new RuntimeException(e.getMessage(), e);
}
}
@SuppressWarnings("unchecked")
<V> V get(final String key) {
return (V) values.get(key);
}
void put(final String key, final Object value) {
if (value != null) {
values.put(key, value);
}
}
void putAll(final Map<String, Object> map) {
values.putAll(map);
}
@Override
public String toString() {
return format("@%s %s", annotationType().getName(), values.toString());
}
@Override
public abstract Class<T> annotationType();
@SuppressWarnings("unchecked")
static <A extends Annotation> Map<String, Object> toMap(final A annotation) {
final Map<String, Object> map = new HashMap<String, Object>();
try {
Class<A> annotationType = (Class<A>) annotation.annotationType();
for (Method method : annotationType.getDeclaredMethods()) {
Object value = method.invoke(annotation);
if (!method.getDefaultValue().equals(value)) {
map.put(method.getName(), value);
}
}
} catch (Exception e) {
throw new MappingException(e.getMessage(), e);
}
return map;
}
@Override
public boolean equals(final Object o) {
if (this == o) {
return true;
}
if (!(o instanceof AnnotationBuilder)) {
return false;
}
return values.equals(((AnnotationBuilder<?>) o).values);
}
@Override
public int hashCode() {
return values.hashCode();
}
}