J3MExporter : allows to save Materials to j3m files.

Added proper test in jme3-plugins

jme3-plugins/build.gradle

@@ -14,4 +14,5 @@ sourceSets {
 
 dependencies {
     compile project(':jme3-core')
+    testCompile project(':jme3-desktop')
 }

jme3-plugins/src/main/java/com/jme3/material/plugin/export/material/J3MExporter.java

@@ -0,0 +1,77 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package com.jme3.material.plugin.export.material;
+
+import com.jme3.export.JmeExporter;
+import com.jme3.export.OutputCapsule;
+import com.jme3.export.Savable;
+import com.jme3.material.Material;
+import com.jme3.material.MaterialDef;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+
+/**
+ * Saves a Material to a j3m file with proper formatting.
+ *
+ * usage is :
+ * <pre>
+ *     J3MExporter exporter = new J3MExporter();
+ *     exporter.save(material, myFile);
+ *     //or
+ *     exporter.save(material, myOutputStream);
+ * </pre>
+ *
+ * @author tsr
+ * @author nehon (documentation and safety check)
+ */
+public class J3MExporter implements JmeExporter {
+
+    private final J3MRootOutputCapsule rootCapsule;
+
+    /**
+     * Create a J3MExporter
+     */
+    public J3MExporter() {
+        rootCapsule = new J3MRootOutputCapsule(this);
+    }
+
+    @Override
+    public void save(Savable object, OutputStream f) throws IOException {
+
+        if (!(object instanceof Material)) {
+            throw new IllegalArgumentException("J3MExporter can only save com.jme3.material.Material class");
+        }
+
+        OutputStreamWriter out = new OutputStreamWriter(f);
+
+        rootCapsule.clear();
+        object.write(this);
+        rootCapsule.writeToStream(out);
+
+        out.flush();
+    }
+
+    @Override
+    public void save(Savable object, File f) throws IOException {
+        try (FileOutputStream fos = new FileOutputStream(f)) {
+            save(object, fos);
+        }
+    }
+
+    @Override
+    public OutputCapsule getCapsule(Savable object) {
+        if ((object instanceof Material) || (object instanceof MaterialDef)) {
+            return rootCapsule;
+        }
+
+        return rootCapsule.getCapsule(object);
+    }
+
+}

jme3-plugins/src/main/java/com/jme3/material/plugin/export/material/J3MOutputCapsule.java

@@ -0,0 +1,383 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package com.jme3.material.plugin.export.material;
+
+import com.jme3.asset.TextureKey;
+import com.jme3.export.OutputCapsule;
+import com.jme3.export.Savable;
+import com.jme3.material.MatParam;
+import com.jme3.material.MatParamTexture;
+import com.jme3.math.*;
+import com.jme3.shader.VarType;
+import com.jme3.texture.Texture;
+import com.jme3.texture.Texture.WrapMode;
+import com.jme3.util.IntMap;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+import java.nio.ByteBuffer;
+import java.nio.FloatBuffer;
+import java.nio.IntBuffer;
+import java.nio.ShortBuffer;
+import java.util.ArrayList;
+import java.util.BitSet;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ *
+ * @author tsr
+ */
+public class J3MOutputCapsule implements OutputCapsule {
+
+    private final HashMap<String, String> parameters;
+    protected final J3MExporter exporter;
+
+    public J3MOutputCapsule(J3MExporter exporter) {
+        this.exporter = exporter;
+        parameters = new HashMap<>();
+    }
+
+    public void writeToStream(OutputStreamWriter out) throws IOException {
+        for (String key : parameters.keySet()) {
+            out.write("      ");
+            writeParameter(out, key, parameters.get(key));
+            out.write("\n");
+        }
+    }
+
+    protected void writeParameter(OutputStreamWriter out, String name, String value) throws IOException {
+        out.write(name);
+        out.write(" : ");
+        out.write(value);
+    }
+
+    public void clear() {
+        parameters.clear();
+    }
+
+    protected void putParameter(String name, String value) {
+        parameters.put(name, value);
+    }
+
+    @Override
+    public void write(boolean value, String name, boolean defVal) throws IOException {
+        if (value == defVal) {
+            return;
+        }
+
+        putParameter(name, ((value) ? "On" : "Off"));
+    }
+
+    @Override
+    public void writeStringSavableMap(Map<String, ? extends Savable> map, String name, Map<String, ? extends Savable> defVal) throws IOException {
+        for (String key : map.keySet()) {
+            Savable value = map.get(key);
+            if (defVal == null || !defVal.containsKey(key) || !defVal.get(key).equals(value)) {
+                putParameter(key, format(value));
+            }
+        }
+    }
+
+    protected String format(Savable value) {
+        if (value instanceof MatParamTexture) {
+            return formatMatParamTexture((MatParamTexture) value);
+        }
+        if (value instanceof MatParam) {
+            return formatMatParam((MatParam) value);
+        }
+
+        throw new UnsupportedOperationException(value.getClass() + ": Not supported yet.");
+    }
+
+    private String formatMatParam(MatParam param){
+        VarType type = param.getVarType();
+        Object val = param.getValue();
+        switch (type) {
+            case Boolean:
+            case Float:
+            case Int:
+                return val.toString();
+            case Vector2:
+                Vector2f v2 = (Vector2f) val;
+                return v2.getX() + " " + v2.getY();
+            case Vector3:
+                Vector3f v3 = (Vector3f) val;
+                return v3.getX() + " " + v3.getY() + " " + v3.getZ();
+            case Vector4:
+                // can be either ColorRGBA, Vector4f or Quaternion
+                if (val instanceof Vector4f) {
+                    Vector4f v4 = (Vector4f) val;
+                    return v4.getX() + " " + v4.getY() + " "
+                            + v4.getZ() + " " + v4.getW();
+                } else if (val instanceof ColorRGBA) {
+                    ColorRGBA color = (ColorRGBA) val;
+                    return color.getRed() + " " + color.getGreen() + " "
+                            + color.getBlue() + " " + color.getAlpha();
+                } else if (val instanceof Quaternion) {
+                    Quaternion quat = (Quaternion) val;
+                    return quat.getX() + " " + quat.getY() + " "
+                            + quat.getZ() + " " + quat.getW();
+                } else {
+                    throw new UnsupportedOperationException("Unexpected Vector4 type: " + val);
+                }
+
+            default:
+                return null; // parameter type not supported in J3M
+        }
+    }
+
+    protected static String formatMatParamTexture(MatParamTexture param) {
+        StringBuilder ret = new StringBuilder();
+        Texture tex = (Texture) param.getValue();
+        TextureKey key;
+        if (tex != null) {
+            key = (TextureKey) tex.getKey();
+
+            if (key != null && key.isFlipY()) {
+                ret.append("Flip ");
+            }
+
+            ret.append(formatWrapMode(tex, Texture.WrapAxis.S));
+            ret.append(formatWrapMode(tex, Texture.WrapAxis.T));
+            ret.append(formatWrapMode(tex, Texture.WrapAxis.R));
+
+            //Min and Mag filter
+            Texture.MinFilter def = Texture.MinFilter.BilinearNoMipMaps;
+            if (tex.getImage().hasMipmaps() || (key != null && key.isGenerateMips())) {
+                def = Texture.MinFilter.Trilinear;
+            }
+            if (tex.getMinFilter() != def) {
+                ret.append("Min").append(tex.getMinFilter().name()).append(" ");
+            }
+
+            if (tex.getMagFilter() != Texture.MagFilter.Bilinear) {
+                ret.append("Mag").append(tex.getMagFilter().name()).append(" ");
+            }
+
+            ret.append("\"").append(key.getName()).append("\"");
+        }
+
+        return ret.toString();
+    }
+
+    protected static String formatWrapMode(Texture texVal, Texture.WrapAxis axis) {
+        WrapMode mode;
+        try {
+            mode = texVal.getWrap(axis);
+        } catch (IllegalArgumentException e) {
+            //this axis doesn't exist on the texture
+            return "";
+        }
+        if (mode != WrapMode.EdgeClamp) {
+            return "Wrap" + mode.name() + "_" + axis.name() + " ";
+        }
+        return "";
+    }
+
+    @Override
+    public void write(Enum value, String name, Enum defVal) throws IOException {
+        if (value == defVal) {
+            return;
+        }
+
+        putParameter(name, value.toString());
+    }
+
+    @Override
+    public void write(float value, String name, float defVal) throws IOException {
+        if (value == defVal) {
+            return;
+        }
+
+        putParameter(name, Float.toString(value));
+    }
+
+    @Override
+    public void write(float[] value, String name, float[] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(float[][] value, String name, float[][] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(double value, String name, double defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(double[] value, String name, double[] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(double[][] value, String name, double[][] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(long value, String name, long defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(long[] value, String name, long[] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(long[][] value, String name, long[][] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(short value, String name, short defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(short[] value, String name, short[] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(short[][] value, String name, short[][] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(boolean[] value, String name, boolean[] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(boolean[][] value, String name, boolean[][] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(String value, String name, String defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(String[] value, String name, String[] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(String[][] value, String name, String[][] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(BitSet value, String name, BitSet defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(Savable object, String name, Savable defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(Savable[] objects, String name, Savable[] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(Savable[][] objects, String name, Savable[][] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void writeSavableArrayList(ArrayList array, String name, ArrayList defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void writeSavableArrayListArray(ArrayList[] array, String name, ArrayList[] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void writeSavableArrayListArray2D(ArrayList[][] array, String name, ArrayList[][] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void writeFloatBufferArrayList(ArrayList<FloatBuffer> array, String name, ArrayList<FloatBuffer> defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void writeByteBufferArrayList(ArrayList<ByteBuffer> array, String name, ArrayList<ByteBuffer> defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void writeSavableMap(Map<? extends Savable, ? extends Savable> map, String name, Map<? extends Savable, ? extends Savable> defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void writeIntSavableMap(IntMap<? extends Savable> map, String name, IntMap<? extends Savable> defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(FloatBuffer value, String name, FloatBuffer defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(IntBuffer value, String name, IntBuffer defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(ByteBuffer value, String name, ByteBuffer defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(ShortBuffer value, String name, ShortBuffer defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(byte value, String name, byte defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(byte[] value, String name, byte[] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(byte[][] value, String name, byte[][] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(int value, String name, int defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(int[] value, String name, int[] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public void write(int[][] value, String name, int[][] defVal) throws IOException {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+}

jme3-plugins/src/main/java/com/jme3/material/plugin/export/material/J3MRenderStateOutputCapsule.java

@@ -0,0 +1,81 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package com.jme3.material.plugin.export.material;
+
+import com.jme3.export.OutputCapsule;
+import com.jme3.export.Savable;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+import java.util.HashMap;
+
+/**
+ *
+ * @author tsr
+ */
+public class J3MRenderStateOutputCapsule extends J3MOutputCapsule {    
+    protected final static HashMap<String, String> NAME_MAP;
+    protected String offsetUnit;
+    
+    static {
+        NAME_MAP = new HashMap<>();
+        NAME_MAP.put( "wireframe", "Wireframe");
+        NAME_MAP.put( "cullMode", "FaceCull");
+        NAME_MAP.put( "depthWrite", "DepthWrite");
+        NAME_MAP.put( "depthTest", "DepthTest");
+        NAME_MAP.put( "blendMode", "Blend");
+        NAME_MAP.put( "alphaFallOff", "AlphaTestFalloff");
+        NAME_MAP.put( "offsetFactor", "PolyOffset");
+        NAME_MAP.put( "colorWrite", "ColorWrite");
+        NAME_MAP.put( "pointSprite", "PointSprite");
+        NAME_MAP.put( "depthFunc", "DepthFunc");
+        NAME_MAP.put( "alphaFunc", "AlphaFunc");
+    }
+    public J3MRenderStateOutputCapsule(J3MExporter exporter) {
+        super(exporter);
+    }
+
+    public OutputCapsule getCapsule(Savable object) {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+    
+    @Override
+    public void clear() {
+        super.clear();
+        offsetUnit = "";
+    }
+
+    @Override
+    public void writeToStream(OutputStreamWriter out) throws IOException {
+        out.write("    AdditionalRenderState {\n");
+        super.writeToStream(out);
+        out.write("    }\n");
+    }  
+    
+    @Override
+    protected void writeParameter(OutputStreamWriter out, String name, String value) throws IOException {
+        out.write(name);
+        out.write(" ");        
+        out.write(value);
+        
+        if( "PolyOffset".equals(name) ) {
+            out.write(" ");
+            out.write(offsetUnit);
+        }        
+    }
+    
+    @Override
+    protected void putParameter(String name, String value ) {
+        if( "offsetUnits".equals(name) ) {
+            offsetUnit = value;
+            return;
+        }
+        
+        if( !NAME_MAP.containsKey(name) )
+            return;
+        
+        super.putParameter(NAME_MAP.get(name), value);
+    }
+}

jme3-plugins/src/main/java/com/jme3/material/plugin/export/material/J3MRootOutputCapsule.java

@@ -0,0 +1,97 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package com.jme3.material.plugin.export.material;
+
+import com.jme3.export.OutputCapsule;
+import com.jme3.export.Savable;
+
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+import java.util.HashMap;
+
+/**
+ * @author tsr
+ */
+public class J3MRootOutputCapsule extends J3MOutputCapsule {
+
+    private final HashMap<Savable, J3MOutputCapsule> outCapsules;
+    private String name;
+    private String materialDefinition;
+    private Boolean isTransparent;
+
+    public J3MRootOutputCapsule(J3MExporter exporter) {
+        super(exporter);
+        outCapsules = new HashMap<>();
+    }
+
+    @Override
+    public void clear() {
+        super.clear();
+        isTransparent = null;
+        name = "";
+        materialDefinition = "";
+        outCapsules.clear();
+
+    }
+
+    public OutputCapsule getCapsule(Savable object) {
+        if (!outCapsules.containsKey(object)) {
+            outCapsules.put(object, new J3MRenderStateOutputCapsule(exporter));
+        }
+
+        return outCapsules.get(object);
+    }
+
+    @Override
+    public void writeToStream(OutputStreamWriter out) throws IOException {
+        out.write("Material " + name + " : " + materialDefinition + " {\n\n");
+        if (isTransparent != null)
+            out.write("    Transparent " + ((isTransparent) ? "On" : "Off") + "\n\n");
+
+        out.write("    MaterialParameters {\n");
+        super.writeToStream(out);
+        out.write("    }\n\n");
+
+        for (J3MOutputCapsule c : outCapsules.values()) {
+            c.writeToStream(out);
+        }
+        out.write("}\n");
+    }
+
+    @Override
+    public void write(String value, String name, String defVal) throws IOException {
+        switch (name) {
+            case "material_def":
+                materialDefinition = value;
+                break;
+            case "name":
+                this.name = value;
+                break;
+            default:
+                throw new UnsupportedOperationException(name + " string material parameter not supported yet");
+        }
+    }
+
+    @Override
+    public void write(boolean value, String name, boolean defVal) throws IOException {
+        if( value == defVal)
+            return;
+
+        switch (name) {
+            case "is_transparent":
+                isTransparent = value;
+                break;
+            default:
+                throw new UnsupportedOperationException(name + " boolean material parameter not supported yet");
+        }
+    }
+
+    @Override
+    public void write(Savable object, String name, Savable defVal) throws IOException {
+        object.write(exporter);
+    }
+
+}

jme3-plugins/src/test/java/com/jme3/material/plugin/TestMaterialWrite.java

@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2009-2016 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.material.plugin;
+
+import com.jme3.asset.AssetManager;
+import com.jme3.material.Material;
+import com.jme3.material.plugin.export.material.J3MExporter;
+import com.jme3.system.JmeSystem;
+import static org.junit.Assert.*;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.Scanner;
+
+public class TestMaterialWrite {
+
+    private AssetManager assetManager;
+    private Material mat;
+
+    @Before
+    public void init() {
+        assetManager = JmeSystem.newAssetManager(
+                TestMaterialWrite.class.getResource("/com/jme3/asset/Desktop.cfg"));
+
+        mat = assetManager.loadMaterial("/testMat.j3m");
+    }
+
+
+    @Test
+    public void testWriteMat() {
+        assertNotNull(mat);
+        ByteArrayOutputStream stream = new ByteArrayOutputStream();
+
+        J3MExporter exporter = new J3MExporter();
+        try {
+            exporter.save(mat, stream);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        String reference = convertStreamToString(TestMaterialWrite.class.getResourceAsStream("/testMat.j3m"));
+//        System.err.println(reference);
+//        System.err.println(stream.toString());
+
+        assertEquals(reference.replaceAll("\\s",""), stream.toString().replaceAll("\\s",""));
+    }
+
+    private String convertStreamToString(java.io.InputStream is) {
+        Scanner s = new Scanner(is).useDelimiter("\\A");
+        return s.hasNext() ? s.next() : "";
+    }
+
+}

jme3-plugins/src/test/resources/testMat.j3m

@@ -0,0 +1,15 @@
+Material test : Common/MatDefs/Light/Lighting.j3md {
+
+    MaterialParameters {
+      Diffuse : 1.0 1.0 1.0 1.0
+      UseMaterialColors : true
+      ParallaxHeight : 0.05
+      Ambient : 1.0 1.0 1.0 1.0
+      DiffuseMap : Flip WrapRepeat_S WrapRepeat_T MinNearestNoMipMaps MagNearest "Textures/ColoredTex/Monkey.png"
+      Specular : 0.01375 0.01375 0.01375 1.0
+      Shininess : 50.0
+    }
+
+    AdditionalRenderState {
+    }
+}