/**
 *
 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either 
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public 
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 * 
 **/
package lucee.runtime.ext.tag;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.Tag;

import lucee.commons.lang.StringUtil;
import lucee.runtime.PageContext;
import lucee.runtime.exp.ApplicationException;

/**
 * Implementation of the Tag
 */
public abstract class TagImpl implements Tag {

	protected PageContext pageContext; 
	private Tag parent;
	   
	/**
	 * sets a PageContext
	 * @param pageContext
	 */
	public void setPageContext(PageContext pageContext) {
		this.pageContext=pageContext;
	}
	@Override
	public void setPageContext(javax.servlet.jsp.PageContext pageContext) {
		this.pageContext=(PageContext) pageContext;
	}

	@Override
	public void setParent(Tag parent) {
        this.parent=parent;
	}

	@Override
	public Tag getParent() {
        return parent;
	}

	@Override
	public int doStartTag() throws JspException {
		return SKIP_BODY;
	}

	@Override
	public int doEndTag() throws JspException {
		return EVAL_PAGE;
	}

	@Override
	public void release() {
		pageContext=null;
		parent=null;
	}    
	
	/**
	 * check if value is not empty
	 * @param tagName
	 * @param attributeName
	 * @param attribute
	 * @throws ApplicationException
	 */
	public void required(String tagName, String actionName, String attributeName, Object attribute) throws ApplicationException {
	    if(attribute==null)
	        throw new ApplicationException("Attribute ["+attributeName+"] for tag ["+tagName+"] is required if attribute action has the value ["+actionName+"]");
    
	}
	public void required(String tagName, String attributeName, Object attribute) throws ApplicationException {
	    if(attribute==null)
	        throw new ApplicationException("Attribute ["+attributeName+"] for tag ["+tagName+"] is required");
    
	}
	
	public void required(String tagName, String actionName, String attributeName, String attribute,boolean trim) throws ApplicationException {
	    if(StringUtil.isEmpty(attribute,trim))
	        throw new ApplicationException("Attribute ["+attributeName+"] for tag ["+tagName+"] is required if attribute action has the value ["+actionName+"]");
    }
	
	public void required(String tagName, String actionName, String attributeName, double attributeValue, double nullValue) throws ApplicationException {
	    if(attributeValue==nullValue)
	        throw new ApplicationException("Attribute ["+attributeName+"] for tag ["+tagName+"] is required if attribute action has the value ["+actionName+"]");
    }
	
	
	
}