private static String toPathString(ModuleIdentifier moduleIdentifier) {
final StringBuilder builder = new StringBuilder();
builder.append(moduleIdentifier.getName().replace('.', File.separatorChar));
builder.append(File.separatorChar).append(moduleIdentifier.getSlot());
builder.append(File.separatorChar);
return builder.toString();
}
/**
* Creates a path name from the module identifier. The name always ends with the separator
* character. A {@code null} identifier will result in no separator being used.
*
* @param identifier the module identifier.
* @param separator the directory separator.
* @return a path name of the module identifier.
* @throws IllegalArgumentException if the module identifier is {@code null}.
*/
public static String baseDirectory(final ModuleIdentifier identifier, final String separator) {
if (identifier == null) {
throw new IllegalArgumentException("The module identifier cannot be null.");
}
final String namePath = identifier.getName().replace('.', File.separatorChar);
final StringBuilder baseName = new StringBuilder();
baseName
.append(namePath)
.append((separator == null ? "" : separator))
.append(identifier.getSlot())
.append((separator == null ? "" : separator));
return baseName.toString();
}
public ModuleSpec findModule(final ModuleIdentifier identifier, final ModuleLoader delegateLoader)
throws ModuleLoadException {
if (identifier.equals(myIdentifier)) {
// special root JAR module
Manifest manifest;
try {
manifest = jarFile.getManifest();
} catch (IOException e) {
throw new ModuleLoadException("Failed to load MANIFEST from JAR", e);
}
ModuleSpec.Builder builder = ModuleSpec.build(identifier);
Attributes mainAttributes = manifest.getMainAttributes();
String mainClass = mainAttributes.getValue(Attributes.Name.MAIN_CLASS);
if (mainClass != null) {
builder.setMainClass(mainClass);
}
String classPath = mainAttributes.getValue(Attributes.Name.CLASS_PATH);
String dependencies = mainAttributes.getValue("Dependencies");
MultiplePathFilterBuilder pathFilterBuilder = PathFilters.multiplePathFilterBuilder(true);
pathFilterBuilder.addFilter(PathFilters.is("modules"), false);
pathFilterBuilder.addFilter(PathFilters.isChildOf("modules"), false);
builder.addResourceRoot(
ResourceLoaderSpec.createResourceLoaderSpec(
new JarFileResourceLoader("", jarFile), pathFilterBuilder.create()));
String[] classPathEntries =
classPath == null ? JarModuleLoader.NO_STRINGS : classPath.split("\\s+");
for (String entry : classPathEntries) {
if (!entry.isEmpty()) {
if (entry.startsWith("../")
|| entry.startsWith("./")
|| entry.startsWith("/")
|| entry.contains("/../")) {
// invalid
continue;
}
if (entry.endsWith("/")) {
// directory reference
File root = new File(jarFile.getName(), entry);
FileResourceLoader resourceLoader = new FileResourceLoader(entry, root);
builder.addResourceRoot(ResourceLoaderSpec.createResourceLoaderSpec(resourceLoader));
} else {
// assume a JAR
File root = new File(jarFile.getName(), entry);
JarFile childJarFile;
try {
childJarFile = new JarFile(root, true);
} catch (IOException e) {
// ignore and continue
continue;
}
builder.addResourceRoot(
ResourceLoaderSpec.createResourceLoaderSpec(
new JarFileResourceLoader(entry, childJarFile)));
}
}
}
String[] dependencyEntries =
dependencies == null ? JarModuleLoader.NO_STRINGS : dependencies.split("\\s*,\\s*");
for (String dependencyEntry : dependencyEntries) {
boolean optional = false;
boolean export = false;
dependencyEntry = dependencyEntry.trim();
if (!dependencyEntry.isEmpty()) {
String[] fields = dependencyEntry.split("\\s+");
if (fields.length < 1) {
continue;
}
String moduleName = fields[0];
for (int i = 1; i < fields.length; i++) {
String field = fields[i];
if (field.equals("optional")) {
optional = true;
} else if (field.equals("export")) {
export = true;
}
// else ignored
}
builder.addDependency(
DependencySpec.createModuleDependencySpec(
ModuleIdentifier.fromString(moduleName), export, optional));
}
}
builder.addDependency(DependencySpec.createSystemDependencySpec(JDKPaths.JDK));
builder.addDependency(DependencySpec.createLocalDependencySpec());
return builder.create();
} else {
String namePath = identifier.getName().replace('.', '/');
String basePath = "modules/" + namePath + "/" + identifier.getSlot();
JarEntry moduleXmlEntry = jarFile.getJarEntry(basePath + "/module.xml");
if (moduleXmlEntry == null) {
return null;
}
ModuleSpec moduleSpec;
try {
InputStream inputStream = jarFile.getInputStream(moduleXmlEntry);
try {
moduleSpec =
ModuleXmlParser.parseModuleXml(
new ModuleXmlParser.ResourceRootFactory() {
public ResourceLoader createResourceLoader(
final String rootPath, final String loaderPath, final String loaderName)
throws IOException {
return new JarFileResourceLoader(loaderName, jarFile, loaderPath);
}
},
basePath,
inputStream,
moduleXmlEntry.getName(),
delegateLoader,
identifier);
} finally {
JarModuleLoader.safeClose(inputStream);
}
} catch (IOException e) {
throw new ModuleLoadException("Failed to read module.xml file", e);
}
return moduleSpec;
}
}
