/**
 * Copyright 2005-2016 hdiv.org
 *
 * 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 org.hdiv.taglib.html;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;

import org.apache.struts.taglib.html.CheckboxTag;
import org.hdiv.dataComposer.IDataComposer;
import org.hdiv.util.HDIVUtil;

/**
 * <p>
 * Renders an HTML &lt;input&gt; element of type <code>checkbox</code>, populated from the specified value or the specified property of the
 * bean associated with our current form. This tag is only valid when nested inside a form tag body.
 * </p>
 * <p>
 * <strong>NOTE</strong>: The underlying property value associated with this field should be of type <code>boolean</code>, and any
 * <code>value</code> you specify should correspond to one of the Strings that indicate a true value ("true", "yes", or "on"). If you wish
 * to utilize a set of related String values, consider using the <code>multibox</code> tag.
 * </p>
 * <p>
 * <strong>WARNING</strong>: In order to correctly recognize unchecked checkboxes, the <code>ActionForm</code> bean associated with this
 * form must include a statement setting the corresponding boolean property to <code>false</code> in the <code>reset()</code> method.
 * </p>
 * 
 * @author Gorka Vicente
 * @see org.apache.struts.taglib.html.CheckboxTag
 */
public class CheckboxTagHDIV extends CheckboxTag {

	/**
	 * Universal version identifier. Deserialization uses this number to ensure that a loaded class corresponds exactly to a serialized
	 * object.
	 */
	private static final long serialVersionUID = -5058375036821473167L;

	/**
	 * Process the start of this tag.
	 * 
	 * @exception JspException if a JSP exception has occurred
	 * @see org.hdiv.dataComposer.IDataComposer#composeFormField(String, String, boolean, String)
	 */
	@Override
	public int doStartTag() throws JspException {

		HttpServletRequest request = (HttpServletRequest) pageContext.getRequest();
		IDataComposer dataComposer = HDIVUtil.getRequestContext(request).getDataComposer();

		// this property is editable and we must check it
		if (dataComposer != null) {
			dataComposer.composeFormField(prepareName(), value, true, null);
		}

		return super.doStartTag();
	}

}
