/*
* 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.scene.plugins.ogre;
import com.jme3.asset.AssetManager;
import com.jme3.asset.AssetNotFoundException;
import com.jme3.material.MaterialList;
import com.jme3.scene.plugins.ogre.matext.OgreMaterialKey;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Stack;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
/**
* This is a utility class to load a {@link MaterialList} from a
* .scene file. It is only needed because the parsing method
* used by the SceneLoader doesn't support reading bottom XML nodes
* before reading the top nodes.
*
* @author Kirill Vainer
*/
class SceneMaterialLoader extends DefaultHandler {
private static final Logger logger = Logger.getLogger(SceneMaterialLoader.class.getName());
private Stack<String> elementStack = new Stack<String>();
private String folderName;
private MaterialList materialList;
private AssetManager assetManager;
private boolean ignoreItem = false;
private void reset(){
elementStack.clear();
materialList = null;
ignoreItem = false;
}
private void checkTopNode(String topNode) throws SAXException{
if (!elementStack.peek().equals(topNode)){
throw new SAXException("dotScene parse error: Expected parent node to be " + topNode);
}
}
@Override
public void startElement(String uri, String localName, String qName, Attributes attribs) throws SAXException {
if (qName.equals("externals")) {
checkTopNode("scene");
// Has an externals block, create material list.
materialList = new MaterialList();
} else if (qName.equals("item")) {
checkTopNode("externals");
if (!attribs.getValue("type").equals("material")) {
// This is not a material external. Ignore it.
ignoreItem = true;
}
} else if (qName.equals("file")) {
checkTopNode("item");
if (!ignoreItem) {
String materialPath = attribs.getValue("name");
String materialName = new File(materialPath).getName();
String matFile = folderName + materialName;
try {
MaterialList loadedMaterialList = (MaterialList) assetManager.loadAsset(new OgreMaterialKey(matFile));
materialList.putAll(loadedMaterialList);
} catch (AssetNotFoundException ex) {
logger.log(Level.WARNING, "Cannot locate material file: {0}", matFile);
}
}
}
elementStack.push(qName);
}
@Override
public void endElement(String uri, String name, String qName) throws SAXException {
if (qName.equals("item") && ignoreItem) {
ignoreItem = false;
}
checkTopNode(qName);
elementStack.pop();
}
public MaterialList load(AssetManager assetManager, String folderName, InputStream in) throws IOException {
try {
this.assetManager = assetManager;
this.folderName = folderName;
reset();
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setNamespaceAware(true);
XMLReader xr = factory.newSAXParser().getXMLReader();
xr.setContentHandler(this);
xr.setErrorHandler(this);
InputStreamReader r = null;
try {
r = new InputStreamReader(in);
xr.parse(new InputSource(r));
} finally {
if (r != null){
r.close();
}
}
return materialList;
} catch (SAXException ex) {
IOException ioEx = new IOException("Error while parsing Ogre3D dotScene");
ioEx.initCause(ex);
throw ioEx;
} catch (ParserConfigurationException ex) {
IOException ioEx = new IOException("Error while parsing Ogre3D dotScene");
ioEx.initCause(ex);
throw ioEx;
}
}
}