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/*
* Copyright 2011 Vaadin Ltd.
*
* 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 com.vaadin.terminal;
import com.vaadin.terminal.gwt.server.AbstractApplicationServlet;
/**
* <code>SystemError</code> is an error message for a problem caused by error in
* system, not the user application code. The system error can contain technical
* information such as stack trace and exception.
*
* SystemError does not support HTML in error messages or stack traces. If HTML
* messages are required, use {@link UserError} or a custom implementation of
* {@link ErrorMessage}.
*
* @author Vaadin Ltd.
* @since 3.0
*/
@SuppressWarnings("serial")
public class SystemError extends AbstractErrorMessage {
/**
* Constructor for SystemError with error message specified.
*
* @param message
* the Textual error description.
*/
public SystemError(String message) {
super(message);
setErrorLevel(ErrorLevel.SYSTEMERROR);
setMode(ContentMode.XHTML);
setMessage(getHtmlMessage());
}
/**
* Constructor for SystemError with causing exception and error message.
*
* @param message
* the Textual error description.
* @param cause
* the throwable causing the system error.
*/
public SystemError(String message, Throwable cause) {
this(message);
addCause(AbstractErrorMessage.getErrorMessageForException(cause));
}
/**
* Constructor for SystemError with cause.
*
* @param cause
* the throwable causing the system error.
*/
public SystemError(Throwable cause) {
this(null, cause);
}
/**
* Returns the message of the error in HTML.
*
* Note that this API may change in future versions.
*/
protected String getHtmlMessage() {
// TODO wrapping div with namespace? See the old code:
// target.addXMLSection("div", message,
// "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd");
StringBuilder sb = new StringBuilder();
if (getMessage() != null) {
sb.append("<h2>");
sb.append(AbstractApplicationServlet
.safeEscapeForHtml(getMessage()));
sb.append("</h2>");
}
return sb.toString();
}
}
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