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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.flow.fileresolver;

import java.io.InputStream;
import java.util.List;

import org.tinygroup.fileresolver.FileResolver;
import org.tinygroup.fileresolver.impl.AbstractFileProcessor;
import org.tinygroup.flow.FlowExecutor;
import org.tinygroup.flow.config.Flow;
import org.tinygroup.flow.release.FlowReleaseManager;
import org.tinygroup.logger.LogLevel;
import org.tinygroup.vfs.FileObject;
import org.tinygroup.xstream.XStreamFactory;

import com.thoughtworks.xstream.XStream;

public class FlowFileProcessor extends AbstractFileProcessor {
	private static final String FLOW_EXT_FILENAME = ".flow";
	private FlowExecutor flowExecutor;
	
	
	public FlowExecutor getFlowExecutor() {
		return flowExecutor;
	}

	public void setFlowExecutor(FlowExecutor flowExecutor) {
		this.flowExecutor = flowExecutor;
	}

	public List getFlowFiles() {
		return fileObjects;
	}

	protected boolean checkMatch(FileObject fileObject) {
		return !fileObject.isFolder()&&fileObject.getFileName().endsWith(FLOW_EXT_FILENAME);
	}

	public void process() {
		XStream stream = XStreamFactory
				.getXStream(FlowExecutor.FLOW_XSTREAM_PACKAGENAME);
		for (FileObject fileObject : deleteList) {
			LOGGER.logMessage(LogLevel.INFO, "正在删除逻辑流程flow文件[{0}]",
					fileObject.getAbsolutePath());
			Flow flow = (Flow) caches.get(fileObject.getAbsolutePath());
			if (flow != null) {
				flowExecutor.removeFlow(flow);
				caches.remove(fileObject.getAbsolutePath());
			}
			LOGGER.logMessage(LogLevel.INFO, "删除逻辑流程flow文件[{0}]结束",
					fileObject.getAbsolutePath());
		}
		for (FileObject fileObject : changeList) {
			LOGGER.logMessage(LogLevel.INFO, "正在读取逻辑流程flow文件[{0}]",
					fileObject.getAbsolutePath());
			Flow oldFlow=(Flow)caches.get(fileObject.getAbsolutePath());
			if(oldFlow!=null){
				flowExecutor.removeFlow(oldFlow);
			}
			InputStream inputStream = fileObject.getInputStream();
			Flow flow = (Flow) stream.fromXML(inputStream);
			try {
				inputStream.close();
			} catch (Exception e) {
				LOGGER.errorMessage("关闭文件流时出错,文件路径:{}",e, fileObject.getAbsolutePath());
			}
			if (!FlowReleaseManager.isAccept(flow.getId())) {
				LOGGER.logMessage(LogLevel.INFO, "过滤flow: {0}" ,flow.getId());
				continue;
			}
			flowExecutor.addFlow(flow);
            caches.put(fileObject.getAbsolutePath(), flow);
			LOGGER.logMessage(LogLevel.INFO, "读取逻辑流程flow文件[{0}]结束",
					fileObject.getAbsolutePath());
		}
		flowExecutor.assemble();
	}

	public void setFileResolver(FileResolver fileResolver) {

	}

}