/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>.
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.persistence;
import java.io.Serializable;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.List;
import java.util.concurrent.atomic.AtomicReference;
import org.smallmind.nutsnbolts.reflection.type.GenericUtility;
import org.smallmind.nutsnbolts.reflection.type.TypeInference;
import org.smallmind.persistence.orm.ORMInitializationException;
public abstract class AbstractManagedDao<I extends Serializable & Comparable<I>, D extends Durable<I>> implements ManagedDao<I, D> {
private final TypeInference idTypeInference = new TypeInference();
private final TypeInference durableTypeInference = new TypeInference();
private final AtomicReference<Method> fromStringMethodRef = new AtomicReference<>();
private final String metricSource;
public AbstractManagedDao (String metricSource) {
this.metricSource = metricSource;
List<Class<?>> typeArguments = GenericUtility.getTypeArguments(AbstractManagedDao.class, this.getClass());
if (typeArguments.size() == 2) {
if (typeArguments.get(0) != null) {
idTypeInference.addPossibility(typeArguments.get(0));
}
if (typeArguments.get(1) != null) {
durableTypeInference.addPossibility(typeArguments.get(1));
}
}
}
public String getMetricSource () {
return metricSource;
}
public Class<D> getManagedClass () {
return durableTypeInference.getInference();
}
public Class<I> getIdClass () {
return idTypeInference.getInference();
}
public I getId (D durable) {
return durable.getId();
}
public I getIdFromString (String value) {
Class<I> idClass = getIdClass();
if (String.class.equals(idClass)) {
return idClass.cast(value);
}
if (idClass.isEnum()) {
return (I)(Enum.valueOf(idClass.asSubclass(Enum.class), value));
}
if (long.class.equals(idClass) || (Long.class.equals(idClass))) {
return idClass.cast(Long.parseLong(value));
}
if (boolean.class.equals(idClass) || (Boolean.class.equals(idClass))) {
return idClass.cast(Boolean.parseBoolean(value));
}
if (int.class.equals(idClass) || (Integer.class.equals(idClass))) {
return idClass.cast(Integer.parseInt(value));
}
if (double.class.equals(idClass) || (Double.class.equals(idClass))) {
return idClass.cast(Double.parseDouble(value));
}
if (float.class.equals(idClass) || (Float.class.equals(idClass))) {
return idClass.cast(Float.parseFloat(value));
}
if (char.class.equals(idClass) || (Character.class.equals(idClass))) {
return idClass.cast(value.charAt(0));
}
if (short.class.equals(idClass) || (Short.class.equals(idClass))) {
return idClass.cast(Short.parseShort(value));
}
if (byte.class.equals(idClass) || (Byte.class.equals(idClass))) {
return idClass.cast(Byte.parseByte(value));
}
if (Identifier.class.isAssignableFrom(idClass)) {
try {
Method fromStringMethod;
if ((fromStringMethod = fromStringMethodRef.get()) == null) {
fromStringMethod = idClass.getMethod("fromString", String.class);
if (!Modifier.isStatic(fromStringMethod.getModifiers())) {
throw new ORMInitializationException("The fromString() method in the identifier class(%s) needs to be declared static", idClass.getName());
}
fromStringMethodRef.compareAndSet(null, fromStringMethod);
}
return idClass.cast(fromStringMethod.invoke(null, value));
} catch (Exception exception) {
throw new ORMInitializationException(exception);
}
}
throw new ORMInitializationException("Id class is neither a String, an Enum, a primitive type, nor a primitive wrapper, and does not implement Identifier, so you need to override getIdFromString(String value)");
}
}