com.google.gwt.dev.shell.HostedHtmlVersion Maven / Gradle / Ivy
/*
* Copyright 2008 Google Inc.
*
* 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.google.gwt.dev.shell;
import com.google.gwt.core.ext.TreeLogger;
/**
* Holds the expected version number for the hosted.html file and a check
* for it.
*/
public class HostedHtmlVersion {
/**
* The version number that should be passed into gwtOnLoad. Must match the
* version in hosted.html.
*/
public static final String EXPECTED_GWT_ONLOAD_VERSION = "2.1";
/**
* Validate that the supplied hosted.html version matches.
*
* This is to detect cases where users upgrade to a new version but forget to
* update the generated hosted.html file.
*
* @param logger to report errors on
* @param version version supplied by hosted.html file
* @return true if the version is valid, false otherwise
*/
public static boolean validHostedHtmlVersion(TreeLogger logger,
String version) {
if (!EXPECTED_GWT_ONLOAD_VERSION.equals(version)) {
logger.log(TreeLogger.ERROR,
"Invalid version number \"" + version
+ "\" passed to external.gwtOnLoad(), expected \""
+ EXPECTED_GWT_ONLOAD_VERSION
+ "\"; your development mode bootstrap file may be out of date; "
+ "if you are using -noserver try recompiling and redeploying "
+ "your app; if you just switched to a different version of "
+ "GWT, try clearing your browser cache");
return false;
}
return true;
}
// prevent instantiation
private HostedHtmlVersion() {
}
}