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/**
 *  Copyright (c) 1997-2013, www.tinygroup.org ([email protected]).
 *
 *  Licensed under the GPL, Version 3.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.gnu.org/licenses/gpl.html
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.tinygroup.database.fileresolver;

import com.thoughtworks.xstream.XStream;
import org.tinygroup.database.config.view.Views;
import org.tinygroup.database.util.DataBaseUtil;
import org.tinygroup.database.view.ViewProcessor;
import org.tinygroup.fileresolver.impl.AbstractFileProcessor;
import org.tinygroup.logger.LogLevel;
import org.tinygroup.vfs.FileObject;
import org.tinygroup.xstream.XStreamFactory;

public class ViewFileResolver extends AbstractFileProcessor {

	private static final String VIEW_EXTFILENAME = ".view.xml";
	ViewProcessor viewProcessor;
	
	public ViewProcessor getViewProcessor() {
		return viewProcessor;
	}

	public void setViewProcessor(ViewProcessor viewProcessor) {
		this.viewProcessor = viewProcessor;
	}


	public void process() {
		XStream stream = XStreamFactory
				.getXStream(DataBaseUtil.DATABASE_XSTREAM);
		for (FileObject fileObject : deleteList) {
			LOGGER.logMessage(LogLevel.INFO, "正在移除view文件[{0}]",
					fileObject.getAbsolutePath());
			Views views = (Views) caches.get(fileObject.getAbsolutePath());
			if (views != null) {
				viewProcessor.removeViews(views);
				caches.remove(fileObject.getAbsolutePath());
			}
			LOGGER.logMessage(LogLevel.INFO, "移除view文件[{0}]结束",
					fileObject.getAbsolutePath());
		}
		for (FileObject fileObject : changeList) {
			LOGGER.logMessage(LogLevel.INFO, "正在加载view文件[{0}]",
					fileObject.getAbsolutePath());
			Views oldViews = (Views) caches.get(fileObject.getAbsolutePath());
			if (oldViews != null) {
				viewProcessor.removeViews(oldViews);
			}
			Views views = (Views) stream.fromXML(fileObject.getInputStream());
			viewProcessor.addViews(views);
			caches.put(fileObject.getAbsolutePath(), views);
			LOGGER.logMessage(LogLevel.INFO, "加载view文件[{0}]结束",
					fileObject.getAbsolutePath());
		}
		viewProcessor.dependencyInit();
	}

	@Override
	protected boolean checkMatch(FileObject fileObject) {
		return fileObject.getFileName().endsWith(VIEW_EXTFILENAME) || fileObject.getFileName().endsWith(".view");
	}

}