/* Copyright 2005-2006 Tim Fennell
*
* 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.sourceforge.stripes.tag;
import net.sourceforge.stripes.util.Log;
import net.sourceforge.stripes.validation.ValidationError;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.Tag;
import java.io.IOException;
import java.util.Locale;
/**
* The individual-error tag works in concert with a parent errors tag to control the
* output of each iteration of an error. Placed within a parent errors tag,
* the body output of the parent will be displayed for each matching error
* to output iterate the body of that parent displaying each error in turn.
*
* @author Greg Hinkle
*/
public class IndividualErrorTag extends HtmlTagSupport implements Tag {
private static final Log log = Log.getInstance(IndividualErrorTag.class);
/**
* Does nothing
* @return SKIP_BODY always
* @throws JspException
*/
@Override
public int doStartTag() throws JspException {
return SKIP_BODY;
}
/**
* Outputs the error for the current iteration of the parent ErrorsTag.
*
* @return EVAL_PAGE in all circumstances
*/
@Override
public int doEndTag() throws JspException {
Locale locale = getPageContext().getRequest().getLocale();
JspWriter writer = getPageContext().getOut();
ErrorsTag parentErrorsTag = getParentTag(ErrorsTag.class);
if (parentErrorsTag != null) {
// Mode: sub-tag inside an errors tag
try {
ValidationError error = parentErrorsTag.getCurrentError();
writer.write( error.getMessage(locale) );
}
catch (IOException ioe) {
JspException jspe = new JspException("IOException encountered while writing " +
"error tag to the JspWriter.", ioe);
log.warn(jspe);
throw jspe;
}
}
return EVAL_PAGE;
}
}