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/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 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
* or .
*
* 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.nutsnbolts.reflection;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import org.smallmind.nutsnbolts.lang.TypeMismatchException;
public interface Overlay> {
default void overliad () {
}
default O overlay (O[] overlays) {
return overlay(overlays, null);
}
default O overlay (O[] overlays, Field[] exclusions) {
if ((overlays != null) && (overlays.length > 0)) {
for (O overlay : overlays) {
overlay(overlay, exclusions);
}
}
return (O)this;
}
default O overlay (O overlay) {
return overlay(overlay, null);
}
default O overlay (O overlay, Field[] exclusions) {
if (overlay != null) {
if (!overlay.getClass().isAssignableFrom(this.getClass())) {
throw new TypeMismatchException("Overlays must be assignable from type(%s)", this.getClass());
} else {
boolean excluded;
for (FieldAccessor fieldAccessor : FieldUtility.getFieldAccessors(this.getClass())) {
excluded = false;
if ((exclusions != null) && (exclusions.length > 0)) {
for (Field exclusion : exclusions) {
if (!exclusion.getDeclaringClass().isAssignableFrom(this.getClass())) {
throw new TypeMismatchException("The type(%s) does not contain the excluded field(%s)", this.getClass().getName(), exclusion.getName());
} else if (exclusion.equals(fieldAccessor.getField())) {
excluded = true;
break;
}
}
}
if (!excluded) {
Object value;
try {
if ((value = fieldAccessor.get(overlay)) != null) {
if (Overlay.class.isAssignableFrom(fieldAccessor.getType())) {
Overlay original;
if ((original = (Overlay)fieldAccessor.get(this)) != null) {
fieldAccessor.set(this, fieldAccessor.getType().cast(original.overlay((Overlay)value)));
} else {
fieldAccessor.set(this, value);
}
} else {
fieldAccessor.set(this, value);
}
}
} catch (IllegalAccessException | InvocationTargetException exception) {
throw new OverlayException(exception);
}
}
}
}
}
this.overliad();
return (O)this;
}
}
