package org.g4studio.core.web.taglib.ext;
import java.io.IOException;
import java.io.StringWriter;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.g4studio.common.util.WebUtils;
import org.g4studio.core.metatype.Dto;
import org.g4studio.core.metatype.impl.BaseDto;
import org.g4studio.core.tplengine.DefaultTemplate;
import org.g4studio.core.tplengine.FileTemplate;
import org.g4studio.core.tplengine.TemplateEngine;
import org.g4studio.core.tplengine.TemplateEngineFactory;
import org.g4studio.core.tplengine.TemplateType;
import org.g4studio.core.util.G4Constants;
import org.g4studio.core.web.taglib.util.TagConstant;
import org.g4studio.core.web.taglib.util.TagHelper;
/**
* CodeRenderTag标签<br>
* 导入Ext扩展组件的CSS、JS资源
*
* @author XiongChun
* @since 2010-01-30
*/
public class CodeRenderTag extends TagSupport {
private static Log log = LogFactory.getLog(CodeRenderTag.class);
private String fields;
/**
* 标签开始
*/
public int doStartTag() throws JspException {
HttpServletRequest request = (HttpServletRequest) pageContext.getRequest();
StringBuffer sb = new StringBuffer();
sb.append(TagConstant.SCRIPT_START);
Dto dto = new BaseDto();
String[] arrayFields = fields.split(",");
TemplateEngine engine = TemplateEngineFactory.getTemplateEngine(TemplateType.VELOCITY);
DefaultTemplate template = new FileTemplate();
template.setTemplateResource(TagHelper.getTemplatePath(getClass().getName()));
for (int i = 0; i < arrayFields.length; i++) {
List codeList = WebUtils.getCodeListByField(arrayFields[i], request);
dto.put("codeList", codeList);
dto.put("field", arrayFields[i]);
StringWriter writer = engine.mergeTemplate(template, dto);
sb.append(writer.toString());
}
sb.append(TagConstant.SCRIPT_END);
try {
pageContext.getOut().write(sb.toString());
} catch (IOException e) {
log.error(G4Constants.Exception_Head + e.getMessage());
e.printStackTrace();
}
return super.SKIP_BODY;
}
/**
* 标签结束
*/
public int doEndTag() throws JspException {
return super.EVAL_PAGE;
}
/**
* 释放资源
*/
public void release() {
fields = null;
super.release();
}
public void setFields(String fields) {
this.fields = fields;
}
}