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ModelBase.java
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package act.db;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2017 ActFramework
* %%
* 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.
* #L%
*/
import act.app.App;
import act.inject.param.NoBind;
import org.osgl.$;
import org.osgl.util.E;
import org.osgl.util.Generics;
import org.osgl.util.S;
import java.lang.reflect.Type;
import java.util.List;
/**
* The model base class
* @param <MODEL_TYPE> the generic type of Model class
* @param <ID_TYPE> the generic type of the ID (Key)
*/
@NoBind
public abstract class ModelBase<ID_TYPE, MODEL_TYPE extends ModelBase>
implements Model<ID_TYPE, MODEL_TYPE> {
protected transient Type idType;
protected transient Type modelType;
public ModelBase() {
exploreTypes();
}
// for JSON deserialization
public ID_TYPE getId() {
return _id();
}
// for JSON deserialization
public void setId(ID_TYPE id) {
_id(id);
}
protected Class<ID_TYPE> idType() {
return Generics.classOf(idType);
}
protected Class<MODEL_TYPE> modelType() {
return Generics.classOf(modelType);
}
/**
* Returns a {@link Dao} object that can operate on this entity of
* the entities with the same type.
*
* <p>Note this method needs to be enhanced by framework to be called</p>
*
* @return the {@code Dao} object
*/
public static <T extends Dao>
T dao() {
throw E.unsupport("Please make sure you have Entity annotation tagged on your model class");
}
/**
* Returns a {@link Dao} object that can operate on this entity of
* the entities with the same type.
*
* <p>Note this method needs to be enhanced by framework to be called</p>
*
* @return the {@code Dao} object
*/
public static <T extends Dao>
T dao(Class<T> cls) {
throw E.unsupport("Please make sure you have Entity annotation tagged on your model class");
}
@Override
public int hashCode() {
return $.hc(getClass(), _id());
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if ($.eq(obj.getClass(), getClass())) {
Model that = (Model) obj;
return $.eq(that._id(), this._id());
}
return false;
}
@Override
public String toString() {
return S.concat(getClass().getName(), "[", S.string(getId()), "]");
}
protected final MODEL_TYPE _me() {
return (MODEL_TYPE)this;
}
private void exploreTypes() {
List<Type> types = Generics.typeParamImplementations(getClass(), ModelBase.class);
int sz = types.size();
if (sz < 1) {
return;
}
if (sz > 1) {
modelType = types.get(1);
}
idType = types.get(0);
}
}