lodsve.core.template.AbstractTemplateResource Maven / Gradle / Ivy

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/*
 * Copyright (C) 2018  Sun.Hao
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */

package lodsve.core.template;

import org.springframework.core.io.AbstractResource;

import java.io.*;
import java.util.Map;

/**
 * 利用模板引擎生成Spring Resource.
 *
 * @author sunhao([email protected])
 * @date 14-8-30 上午1:04
 */
public abstract class AbstractTemplateResource extends AbstractResource {
    /**
     * 模板路径
     */
    protected String template;
    /**
     * 模板需要的参数
     */
    protected Map context;
    /**
     * 描述，即来源
     */
    protected String description;

    protected AbstractTemplateResource(String template, Map context) {
        this.template = template;
        this.context = context;
    }

    AbstractTemplateResource(String template, Map context, String description) {
        this.template = template;
        this.context = context;
        this.description = description == null ? "from template" : description;
    }

    @Override
    public InputStream getInputStream() throws IOException {
        return new ByteArrayInputStream(renderTemplate().getBytes("UTF-8"));
    }

    @Override
    public String getDescription() {
        return this.description;
    }

    /**
     * 渲染模板
     *
     * @return 渲染后的内容
     */
    public abstract String renderTemplate();
}