/*
 * Copyright 2008-2009 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 net.hasor.web.jstl.taglib;
import net.hasor.core.AppContext;
import net.hasor.core.utils.StringUtils;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.Tag;
/**
 *
 * @version : 2013-12-24
 * @author 赵永春(zyc@hasor.net)
 */
public class DefineBeanTag extends AbstractTag {
    private static final long   serialVersionUID = 8066383523368039588L;
    private              String var              = null;
    private              String bean             = null;
    public String getVar() {
        return this.var;
    }
    public void setVar(final String var) {
        this.var = var;
    }
    public String getBean() {
        return this.bean;
    }
    public void setBean(final String bean) {
        this.bean = bean;
    }
    //
    //
    //
    @Override
    public void release() {
        this.var = null;
        this.bean = null;
    }
    @Override
    public int doStartTag() throws JspException {
        if (StringUtils.isBlank(this.var)) {
            throw new NullPointerException("tag param var is null.");
        }
        if (StringUtils.isBlank(this.bean)) {
            throw new NullPointerException("tag param bean is null.");
        }
        //
        AppContext appContext = getAppContext();
        Object targetBean = appContext.getBindInfo(this.bean);
        this.pageContext.setAttribute(this.var, targetBean);
        return Tag.SKIP_BODY;
    }
}