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package org.apache.taglibs.standard.tag.common.sql;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.jstl.sql.SQLExecutionTag;
import javax.servlet.jsp.tagext.BodyTagSupport;
import org.apache.taglibs.standard.resources.Resources;
/**
* <p>Tag handler for <Param> in JSTL, used to set
* parameter values for a SQL statement.</p>
*
* @author Hans Bergsten
*/
public abstract class ParamTagSupport extends BodyTagSupport {
protected Object value;
//*********************************************************************
// Tag logic
public int doEndTag() throws JspException {
SQLExecutionTag parent = (SQLExecutionTag)
findAncestorWithClass(this, SQLExecutionTag.class);
if (parent == null) {
throw new JspTagException(
Resources.getMessage("SQL_PARAM_OUTSIDE_PARENT"));
}
Object paramValue = null;
if (value != null) {
paramValue = value;
}
else if (bodyContent != null) {
paramValue = bodyContent.getString().trim();
if (((String) paramValue).trim().length() == 0) {
paramValue = null;
}
}
parent.addSQLParameter(paramValue);
return EVAL_PAGE;
}
}