org.hlc.demo.mybatis.comment.CodetemplatesLoader.java Source code

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Here is the source code for org.hlc.demo.mybatis.comment.CodetemplatesLoader.java

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/*
 * Copyright 2002-2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * 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.hlc.demo.mybatis.comment;

import java.net.URL;
import java.util.Map;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

import com.google.common.collect.Maps;
import com.google.common.io.Resources;

/**
 * TODO.
 *
 * @author huanglicong
 * @version V1.0
 */
public class CodetemplatesLoader {

    private static CodetemplatesLoader instance;

    private Map<String, String> templates = Maps.newLinkedHashMap();

    public static CodetemplatesLoader getInstance() {
        if (instance == null) {
            instance = new CodetemplatesLoader();
            try {
                instance.loadAndResolveDocument();
            } catch (DocumentException e) {
                throw new RuntimeException(e);
            }
        }
        return instance;
    }

    private void loadAndResolveDocument() throws DocumentException {
        URL url = Resources.getResource("codetemplates.xml");
        SAXReader reader = new SAXReader();
        Document document = reader.read(url.getFile());
        Element root = document.getRootElement();
        TemplateVisitor visitor = new TemplateVisitor();
        root.accept(visitor);
        templates.putAll(visitor.getTemplates());
    }

    public String get(Object key) {
        return templates.get(key);
    }

}