public Object load(AssetInfo info) throws IOException {
this.assetManager = info.getManager();
InputStream in = info.openStream();
try {
key = info.getKey();
if (key.getExtension().equals("j3m") && !(key instanceof MaterialKey)) {
throw new IOException("Material instances must be loaded via MaterialKey");
} else if (key.getExtension().equals("j3md") && key instanceof MaterialKey) {
throw new IOException("Material definitions must be loaded via AssetKey");
}
loadFromRoot(BlockLanguageParser.parse(in));
} finally {
if (in != null) {
in.close();
}
}
if (material != null) {
// material implementation
return material;
} else {
// material definition
return materialDef;
}
}
private void loadFromRoot(List<Statement> roots) throws IOException {
if (roots.size() == 2) {
Statement exception = roots.get(0);
String line = exception.getLine();
if (line.startsWith("Exception")) {
throw new AssetLoadException(line.substring("Exception ".length()));
} else {
throw new IOException("In multiroot material, expected first statement to be 'Exception'");
}
} else if (roots.size() != 1) {
throw new IOException("Too many roots in J3M/J3MD file");
}
boolean extending = false;
Statement materialStat = roots.get(0);
String materialName = materialStat.getLine();
if (materialName.startsWith("MaterialDef")) {
materialName = materialName.substring("MaterialDef ".length()).trim();
extending = false;
} else if (materialName.startsWith("Material")) {
materialName = materialName.substring("Material ".length()).trim();
extending = true;
} else {
throw new IOException("Specified file is not a Material file");
}
String[] split = materialName.split(":", 2);
if (materialName.equals("")) {
throw new MatParseException("Material name cannot be empty", materialStat);
}
if (split.length == 2) {
if (!extending) {
throw new MatParseException("Must use 'Material' when extending.", materialStat);
}
String extendedMat = split[1].trim();
MaterialDef def = (MaterialDef) assetManager.loadAsset(new AssetKey(extendedMat));
if (def == null) {
throw new MatParseException(
"Extended material " + extendedMat + " cannot be found.", materialStat);
}
material = new Material(def);
material.setKey(key);
material.setName(split[0].trim());
// material.setAssetName(fileName);
} else if (split.length == 1) {
if (extending) {
throw new MatParseException("Expected ':', got '{'", materialStat);
}
materialDef = new MaterialDef(assetManager, materialName);
// NOTE: pass file name for defs so they can be loaded later
materialDef.setAssetName(key.getName());
} else {
throw new MatParseException("Cannot use colon in material name/path", materialStat);
}
for (Statement statement : materialStat.getContents()) {
split = statement.getLine().split("[ \\{]");
String statType = split[0];
if (extending) {
if (statType.equals("MaterialParameters")) {
readExtendingMaterialParams(statement.getContents());
} else if (statType.equals("AdditionalRenderState")) {
readAdditionalRenderState(statement.getContents());
} else if (statType.equals("Transparent")) {
readTransparentStatement(statement.getLine());
}
} else {
if (statType.equals("Technique")) {
readTechnique(statement);
} else if (statType.equals("MaterialParameters")) {
readMaterialParams(statement.getContents());
} else {
throw new MatParseException(
"Expected material statement, got '" + statType + "'", statement);
}
}
}
}