com.google.gwt.user.tools.util.CreatorUtilities 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.user.tools.util;
import com.google.gwt.dev.cfg.ModuleDefLoader;
import java.io.File;
import java.io.FileNotFoundException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
/**
* Utility methods used by ApplicationCreator.
*
*/
public class CreatorUtilities {
/**
* Create a PATH style string separated by the specified delimiter (';' for
* windows, ':' for UNIX) Note that this method prepends the delimiter to the
* front of the string. There is an existing path we want to append to.
*
* @param delimiter The delimiter string to place between variables.
* @param paths The list of paths to concatenate together.
* @return the concatenated list of paths as a single string.
*/
public static String appendPaths(String delimiter, List paths) {
if (paths == null) {
return "";
}
StringBuilder buf = new StringBuilder();
for (String value : paths) {
buf.append(delimiter);
buf.append(value);
}
return buf.toString();
}
/**
* Create the extra path entries for an Eclipse '.launch' file in XML format.
*
* @param extraClassPaths a list of paths/.jar files to add to the class path
* @return A string formatted to include in the .launch file
*/
public static String createEclipseExtraLaunchPaths(
List extraClassPaths) throws FileNotFoundException {
if (extraClassPaths == null) {
return "";
}
// Create an entry for an Eclipse launch file additional classpath entry.
StringBuilder buf = new StringBuilder();
for (String path : extraClassPaths) {
File f = new File(path);
if (!f.exists()) {
throw new FileNotFoundException("extraClassPath: " + path
+ "Must be present before .launch file can be created");
}
String lcPath = path.toLowerCase(Locale.ROOT);
if (f.isDirectory()) {
// For a directory, we assume it contains compiled class files
buf.append("");
buf.append("\n");
} else if (lcPath.endsWith(".jar") || lcPath.endsWith(".zip")) {
// Any plain file we assume is an external library (e.g. a .jar file)
buf.append("");
buf.append("\n");
} else {
throw new RuntimeException("Don't know how to handle path: " + path
+ ". It doesn't appear to be a directory or a .jar/.zip file");
}
}
return buf.toString();
}
/**
* Returns true if moduleName is a valid module
* name.
*/
public static boolean isValidModuleName(String moduleName) {
return moduleName.matches("[\\w]+(\\.[\\w]+)+");
}
/**
* Check to see that the userJar and pathList files all exist, and that the
* moduleList entries can be found within the jars.
*
* @param userJar The full path to gwt-user.jar
* @param pathList A list of jar files to add to the class path.
* @param moduleList A list of GWT module names to add as 'inherits' tags
* @return true if all validations pass.
*/
public static boolean validatePathsAndModules(String userJar,
List pathList, List moduleList) {
List urlList = new ArrayList();
if (!addURL(urlList, userJar)) {
return false;
}
if (pathList != null) {
for (String path : pathList) {
if (!addURL(urlList, path)) {
return false;
}
}
}
/*
* Create a class loader from the extra class paths and the current class
* loader. The assumption is that if the userJar isn't available right now,
* that the current class loader will contain the same gwt.xml module def
* files.
*/
final URL urlArray[] = urlList.toArray(new URL[urlList.size()]);
URLClassLoader classLoader = AccessController.doPrivileged(
new PrivilegedAction() {
public URLClassLoader run() {
return new URLClassLoader(urlArray,
CreatorUtilities.class.getClassLoader());
}
});
if (moduleList != null) {
for (String module : moduleList) {
String modulePath = module.replace(".", "/")
+ ModuleDefLoader.GWT_MODULE_XML_SUFFIX;
URL found = classLoader.getResource(modulePath);
if (found == null) {
System.err.println("Couldn't find module definition file "
+ modulePath + " in class path.");
return false;
}
}
}
return true;
}
/**
* Append a path to a list of URLs.
*
* @param urls list to append to
* @param pathToAdd string to append as the last entry in the URL list.
* @return true on success. false if an error
* occurs (malformed URL or missing file.)
*/
private static boolean addURL(List urls, String pathToAdd) {
File f = new File(pathToAdd);
// Ignore gwt-user.jar in the validation. This helps the build process
// get by when overriding the location of the .jar with -Dgwt.devjar
if (!pathToAdd.matches(".*gwt-user.jar") && !f.exists()) {
System.err.println("Couldn't find library file or path " + pathToAdd);
return false;
}
try {
urls.add(f.toURI().toURL());
} catch (MalformedURLException urlEx) {
urlEx.printStackTrace();
return false;
}
return true;
}
}