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/**
 * Copyright (c) 2012-2016, 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.dialectfunction.DialectFunctions;
import org.tinygroup.database.dialectfunction.DialectFunctionProcessor;
import org.tinygroup.database.util.DataBaseUtil;
import org.tinygroup.fileresolver.impl.AbstractFileProcessor;
import org.tinygroup.logger.LogLevel;
import org.tinygroup.vfs.FileObject;
import org.tinygroup.xstream.XStreamFactory;

public class DialectFunctionlFileResolver extends AbstractFileProcessor {

    private static final String FUNCTION_EXTFILENAME = ".dialectfunction.xml";
    DialectFunctionProcessor functionProcessor;


    public DialectFunctionProcessor getFunctionProcessor() {
        return functionProcessor;
    }

    public void setFunctionProcessor(DialectFunctionProcessor functionProcessor) {
        this.functionProcessor = functionProcessor;
    }

    public void process() {
        XStream stream = XStreamFactory
                .getXStream(DataBaseUtil.DATABASE_XSTREAM);
        for (FileObject fileObject : deleteList) {
            LOGGER.logMessage(LogLevel.INFO, "正在移除function文件[{0}]",
                    fileObject.getAbsolutePath());
            DialectFunctions functions = (DialectFunctions) caches.get(fileObject.getAbsolutePath());
            if (functions != null) {
                functionProcessor.removeDialectFunctions(functions);
                caches.remove(fileObject.getAbsolutePath());
            }
            LOGGER.logMessage(LogLevel.INFO, "移除function文件[{0}]结束",
                    fileObject.getAbsolutePath());
        }
        for (FileObject fileObject : changeList) {
            LOGGER.logMessage(LogLevel.INFO, "正在加载function文件[{0}]",
                    fileObject.getAbsolutePath());
            DialectFunctions oldFunctions = (DialectFunctions) caches.get(fileObject.getAbsolutePath());
            if (oldFunctions != null) {
                functionProcessor.removeDialectFunctions(oldFunctions);
            }
            DialectFunctions functions = (DialectFunctions) stream.fromXML(fileObject
                    .getInputStream());
            functionProcessor.addDialectFunctions(functions);
            caches.put(fileObject.getAbsolutePath(), functions);
            LOGGER.logMessage(LogLevel.INFO, "加载function文件[{0}]结束",
                    fileObject.getAbsolutePath());
        }
    }

    @Override
    protected boolean checkMatch(FileObject fileObject) {
        return fileObject.getFileName().endsWith(FUNCTION_EXTFILENAME);
    }

}