/*
* Copyright (c) 2009-2012 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.plugins;
import com.jme3.asset.AssetInfo;
import com.jme3.asset.AssetKey;
import com.jme3.asset.AssetLoadException;
import com.jme3.asset.AssetLoader;
import com.jme3.asset.ShaderNodeDefinitionKey;
import com.jme3.util.blockparser.BlockLanguageParser;
import com.jme3.util.blockparser.Statement;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
/**
* ShaderNodeDefnition file loader (.j3sn)
*
* a j3sn file is a block style file like j3md or j3m. It must contain one
* ShaderNodeDefinition{} block that contains several ShaderNodeDefinition{}
* blocks
*
* @author Nehon
*/
public class ShaderNodeDefinitionLoader implements AssetLoader {
private ShaderNodeLoaderDelegate loaderDelegate;
@Override
public Object load(AssetInfo assetInfo) throws IOException {
AssetKey k = assetInfo.getKey();
if (!(k instanceof ShaderNodeDefinitionKey)) {
throw new IOException("ShaderNodeDefinition file must be loaded via ShaderNodeDefinitionKey");
}
ShaderNodeDefinitionKey key = (ShaderNodeDefinitionKey) k;
loaderDelegate = new ShaderNodeLoaderDelegate();
InputStream in = assetInfo.openStream();
List<Statement> roots = BlockLanguageParser.parse(in);
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 MatParseException("In multiroot shader node definition, expected first statement to be 'Exception'", exception);
}
} else if (roots.size() != 1) {
throw new MatParseException("Too many roots in J3SN file", roots.get(0));
}
return loaderDelegate.readNodesDefinitions(roots.get(0).getContents(), key);
}
}