/* * 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 DefineTypeTag extends AbstractTag { private static final long serialVersionUID = 7146544912135244582L; private String var = null; private String type = null; public String getVar() { return this.var; } public void setVar(final String var) { this.var = var; } public String getType() { return this.type; } public void setType(final String type) { this.type = type; } // // // @Override public void release() { this.var = null; this.type = null; } @Override public int doStartTag() throws JspException { if (StringUtils.isBlank(this.var)) { throw new NullPointerException("tag param var is null."); } if (StringUtils.isBlank(this.type)) { throw new NullPointerException("tag param type is null."); } // try { Class<?> defineType = Class.forName(this.type); AppContext appContext = getAppContext(); Object targetBean = appContext.getInstance(defineType); this.pageContext.setAttribute(this.var, targetBean); return Tag.SKIP_BODY; } catch (ClassNotFoundException e) { throw new JspException(e); } } }