aboutsummaryrefslogtreecommitdiff
path: root/engine/src/core/com/jme3/export/SavableClassUtil.java
diff options
context:
space:
mode:
Diffstat (limited to 'engine/src/core/com/jme3/export/SavableClassUtil.java')
-rw-r--r--engine/src/core/com/jme3/export/SavableClassUtil.java205
1 files changed, 205 insertions, 0 deletions
diff --git a/engine/src/core/com/jme3/export/SavableClassUtil.java b/engine/src/core/com/jme3/export/SavableClassUtil.java
new file mode 100644
index 0000000..cda328a
--- /dev/null
+++ b/engine/src/core/com/jme3/export/SavableClassUtil.java
@@ -0,0 +1,205 @@
+/*
+ * 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);
+ }
+}