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jMonkeyEngine is a 3-D game engine for adventurous Java developers
/*
* Copyright (c) 2009-2023 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.scene.plugins.gltf;
import com.jme3.asset.AssetLoadException;
import com.jme3.plugins.json.JsonArray;
import com.jme3.plugins.json.JsonElement;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Created by Nehon on 20/08/2017.
*/
public class CustomContentManager {
static volatile Class defaultExtraLoaderClass = UserDataLoader.class;
private ExtrasLoader defaultExtraLoaderInstance;
private final static Logger logger = Logger.getLogger(CustomContentManager.class.getName());
private GltfModelKey key;
private GltfLoader gltfLoader;
static final Map> defaultExtensionLoaders = new ConcurrentHashMap<>();
static {
defaultExtensionLoaders.put("KHR_materials_pbrSpecularGlossiness", PBRSpecGlossExtensionLoader.class);
defaultExtensionLoaders.put("KHR_lights_punctual", LightsPunctualExtensionLoader.class);
defaultExtensionLoaders.put("KHR_materials_unlit", UnlitExtensionLoader.class);
defaultExtensionLoaders.put("KHR_texture_transform", TextureTransformExtensionLoader.class);
defaultExtensionLoaders.put("KHR_materials_emissive_strength", PBREmissiveStrengthExtensionLoader.class);
}
private final Map loadedExtensionLoaders = new HashMap<>();
public CustomContentManager() {
}
/**
* Returns the default extras loader.
* @return the default extras loader.
*/
public ExtrasLoader getDefaultExtrasLoader() {
if (defaultExtraLoaderClass == null) {
defaultExtraLoaderInstance = null; // do not hold reference
return null;
}
if (defaultExtraLoaderInstance != null
&& defaultExtraLoaderInstance.getClass() != defaultExtraLoaderClass) {
defaultExtraLoaderInstance = null; // reset instance if class changed
}
try {
defaultExtraLoaderInstance = defaultExtraLoaderClass.getDeclaredConstructor().newInstance();
} catch (Exception e) {
logger.log(Level.WARNING, "Could not instantiate default extras loader", e);
defaultExtraLoaderInstance = null;
}
return defaultExtraLoaderInstance;
}
void init(GltfLoader gltfLoader) {
this.gltfLoader = gltfLoader;
if (gltfLoader.getInfo().getKey() instanceof GltfModelKey) {
this.key = (GltfModelKey) gltfLoader.getInfo().getKey();
}
JsonArray extensionUsed = gltfLoader.getDocRoot().getAsJsonArray("extensionsUsed");
if (extensionUsed != null) {
for (JsonElement extElem : extensionUsed) {
String ext = extElem.getAsString();
if (ext != null) {
if (defaultExtensionLoaders.get(ext) == null && (this.key != null && this.key.getExtensionLoader(ext) == null)) {
logger.log(Level.WARNING, "Extension " + ext + " is not supported, please provide your own implementation in the GltfModelKey");
}
}
}
}
JsonArray extensionRequired = gltfLoader.getDocRoot().getAsJsonArray("extensionsRequired");
if (extensionRequired != null) {
for (JsonElement extElem : extensionRequired) {
String ext = extElem.getAsString();
if (ext != null) {
if (defaultExtensionLoaders.get(ext) == null && (this.key != null && this.key.getExtensionLoader(ext) == null)) {
logger.log(Level.SEVERE, "Extension " + ext + " is mandatory for this file, the loaded scene result will be unexpected.");
}
}
}
}
}
public T readExtensionAndExtras(String name, JsonElement el, T input) throws AssetLoadException, IOException {
T output = readExtension(name, el, input);
output = readExtras(name, el, output);
return output;
}
@SuppressWarnings("unchecked")
private T readExtension(String name, JsonElement el, T input) throws AssetLoadException, IOException {
JsonElement extensions = el.getAsJsonObject().getAsJsonObject("extensions");
if (extensions == null) {
return input;
}
for (Map.Entry ext : extensions.getAsJsonObject().entrySet()) {
ExtensionLoader loader = null;
if (key != null) {
loader = key.getExtensionLoader(ext.getKey());
}
if (loader == null) {
loader = loadedExtensionLoaders.get(ext.getKey());
if (loader == null) {
try {
Class clz = defaultExtensionLoaders.get(ext.getKey());
if (clz != null) {
loader = clz.getDeclaredConstructor().newInstance();
}
} catch (InstantiationException | IllegalAccessException | IllegalArgumentException | InvocationTargetException | NoSuchMethodException | SecurityException e) {
logger.log(Level.WARNING, "Could not instantiate loader", e);
}
if (loader != null) {
loadedExtensionLoaders.put(ext.getKey(), loader);
}
}
}
if (loader == null) {
logger.log(Level.WARNING, "Could not find loader for extension " + ext.getKey());
continue;
}
try {
return (T) loader.handleExtension(gltfLoader, name, el, ext.getValue(), input);
} catch (ClassCastException e) {
throw new AssetLoadException("Extension loader " + loader.getClass().getName() + " for extension " + ext.getKey() + " is incompatible with type " + input.getClass(), e);
}
}
return input;
}
@SuppressWarnings("unchecked")
private T readExtras(String name, JsonElement el, T input) throws AssetLoadException {
ExtrasLoader loader = null;
if (key != null) { // try to get the extras loader from the model key if available
loader = key.getExtrasLoader();
}
if (loader == null) { // if no loader was found, use the default extras loader
loader = getDefaultExtrasLoader();
}
if (loader == null) { // if default loader is not set or failed to instantiate, skip extras
return input;
}
JsonElement extras = el.getAsJsonObject().getAsJsonObject("extras");
if (extras == null) {
return input;
}
try {
return (T) loader.handleExtras(gltfLoader, name, el, extras, input);
} catch (ClassCastException e) {
throw new AssetLoadException("Extra loader " + loader.getClass().getName() + " for " + name + " is incompatible with type " + input.getClass(), e);
}
}
}
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