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/*
 * Copyright (C) 2008 feilong
 *
 * 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 com.feilong.template;

import java.util.Map;

/**
 * 解析模板.
 *
 * @author feilong
 * @since 3.0.0
 */
public final class TemplateUtil{

    /** The Constant velocityUtil. */
    private static final VelocityUtil velocityUtil = new VelocityUtil();

    /** Don't let anyone instantiate this class. */
    private TemplateUtil(){
        //AssertionError不是必须的. 但它可以避免不小心在类的内部调用构造器. 保证该类在任何情况下都不会被实例化.
        //see 《Effective Java》 2nd
        throw new AssertionError("No " + getClass().getName() + " instances for you!");
    }

    //---------------------------------------------------------------

    /**
     * Parses the string.
     *
     * @param vmContent
     *            the vm content
     * @param contextKeyValues
     *            the context key values
     * @return the string
     */
    public static String parseString(String vmContent,Map contextKeyValues){
        return velocityUtil.parseString(vmContent, contextKeyValues);
    }

    //---------------------------------------------------------------

    /**
     * Parses the template.
     *
     * @param templateInClassPath
     *            the template in class path
     * @return the string
     */
    public static String parseTemplate(String templateInClassPath){
        return velocityUtil.parseTemplateWithClasspathResourceLoader(templateInClassPath);
    }

    /**
     * Parses the template.
     *
     * @param templateInClassPath
     *            the template in class path
     * @param contextKeyValues
     *            the context key values
     * @return the string
     */
    public static String parseTemplate(String templateInClassPath,Map contextKeyValues){
        return velocityUtil.parseTemplateWithClasspathResourceLoader(templateInClassPath, contextKeyValues);
    }
}




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