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/*
* Copyright (c) 2009-2010 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.export;
import com.jme3.animation.Animation;
import com.jme3.effect.shapes.*;
import com.jme3.material.MatParamTexture;
import java.io.IOException;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* <code>SavableClassUtil</code> contains various utilities to handle
* Savable classes. The methods are general enough to not be specific to any
* particular implementation.
* Currently it will remap any classes from old paths to new paths
* so that old J3O models can still be loaded.
*
* @author mpowell
* @author Kirill Vainer
*/
public class SavableClassUtil {
private final static HashMap<String, String> classRemappings = new HashMap<String, String>();
private static void addRemapping(String oldClass, Class<? extends Savable> newClass){
classRemappings.put(oldClass, newClass.getName());
}
static {
addRemapping("com.jme3.effect.EmitterSphereShape", EmitterSphereShape.class);
addRemapping("com.jme3.effect.EmitterBoxShape", EmitterBoxShape.class);
addRemapping("com.jme3.effect.EmitterMeshConvexHullShape", EmitterMeshConvexHullShape.class);
addRemapping("com.jme3.effect.EmitterMeshFaceShape", EmitterMeshFaceShape.class);
addRemapping("com.jme3.effect.EmitterMeshVertexShape", EmitterMeshVertexShape.class);
addRemapping("com.jme3.effect.EmitterPointShape", EmitterPointShape.class);
addRemapping("com.jme3.material.Material$MatParamTexture", MatParamTexture.class);
addRemapping("com.jme3.animation.BoneAnimation", Animation.class);
addRemapping("com.jme3.animation.SpatialAnimation", Animation.class);
}
private static String remapClass(String className) throws ClassNotFoundException {
String result = classRemappings.get(className);
if (result == null) {
return className;
} else {
return result;
}
}
public static boolean isImplementingSavable(Class clazz){
boolean result = Savable.class.isAssignableFrom(clazz);
return result;
}
public static int[] getSavableVersions(Class<? extends Savable> clazz) throws IOException{
ArrayList<Integer> versionList = new ArrayList<Integer>();
Class superclass = clazz;
do {
versionList.add(getSavableVersion(superclass));
superclass = superclass.getSuperclass();
} while (superclass != null && SavableClassUtil.isImplementingSavable(superclass));
int[] versions = new int[versionList.size()];
for (int i = 0; i < versionList.size(); i++){
versions[i] = versionList.get(i);
}
return versions;
}
public static int getSavableVersion(Class<? extends Savable> clazz) throws IOException{
try {
Field field = clazz.getField("SAVABLE_VERSION");
Class<? extends Savable> declaringClass = (Class<? extends Savable>) field.getDeclaringClass();
if (declaringClass == clazz){
return field.getInt(null);
}else{
return 0; // This class doesn't declare this field, e.g. version == 0
}
} catch (IllegalAccessException ex) {
IOException ioEx = new IOException();
ioEx.initCause(ex);
throw ioEx;
} catch (IllegalArgumentException ex) {
throw ex; // can happen if SAVABLE_VERSION is not static
} catch (NoSuchFieldException ex) {
return 0; // not using versions
}
}
public static int getSavedSavableVersion(Object savable, Class<? extends Savable> desiredClass, int[] versions, int formatVersion){
Class thisClass = savable.getClass();
int count = 0;
while (thisClass != desiredClass) {
thisClass = thisClass.getSuperclass();
if (thisClass != null && SavableClassUtil.isImplementingSavable(thisClass)){
count ++;
}else{
break;
}
}
if (thisClass == null){
throw new IllegalArgumentException(savable.getClass().getName() +
" does not extend " +
desiredClass.getName() + "!");
}else if (count >= versions.length){
if (formatVersion <= 1){
return 0; // for buggy versions of j3o
}else{
throw new IllegalArgumentException(savable.getClass().getName() +
" cannot access version of " +
desiredClass.getName() +
" because it doesn't implement Savable");
}
}
return versions[count];
}
/**
* fromName creates a new Savable from the provided class name. First registered modules
* are checked to handle special cases, if the modules do not handle the class name, the
* class is instantiated directly.
* @param className the class name to create.
* @param inputCapsule the InputCapsule that will be used for loading the Savable (to look up ctor parameters)
* @return the Savable instance of the class.
* @throws InstantiationException thrown if the class does not have an empty constructor.
* @throws IllegalAccessException thrown if the class is not accessable.
* @throws ClassNotFoundException thrown if the class name is not in the classpath.
* @throws IOException when loading ctor parameters fails
*/
public static Savable fromName(String className) throws InstantiationException,
IllegalAccessException, ClassNotFoundException, IOException {
className = remapClass(className);
try {
return (Savable) Class.forName(className).newInstance();
} catch (InstantiationException e) {
Logger.getLogger(SavableClassUtil.class.getName()).log(
Level.SEVERE, "Could not access constructor of class ''{0}" + "''! \n"
+ "Some types need to have the BinaryImporter set up in a special way. Please doublecheck the setup.", className);
throw e;
} catch (IllegalAccessException e) {
Logger.getLogger(SavableClassUtil.class.getName()).log(
Level.SEVERE, "{0} \n"
+ "Some types need to have the BinaryImporter set up in a special way. Please doublecheck the setup.", e.getMessage());
throw e;
}
}
public static Savable fromName(String className, List<ClassLoader> loaders) throws InstantiationException,
IllegalAccessException, ClassNotFoundException, IOException {
if (loaders == null) {
return fromName(className);
}
String newClassName = remapClass(className);
synchronized(loaders) {
for (ClassLoader classLoader : loaders){
try {
return (Savable) classLoader.loadClass(newClassName).newInstance();
} catch (InstantiationException e) {
} catch (IllegalAccessException e) {
}
}
}
return fromName(className);
}
}
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