private void loadLanguageMappings(Properties props) {
Enumeration<?> en = props.propertyNames();
while (en.hasMoreElements()) {
String propName = (String) en.nextElement();
String propVal = props.getProperty(propName);
if (propName.startsWith(".")) {
// This is an extension mapping
if (propName.equals(".")) {
// The default mapping
defaultLanguageImplName = propVal;
} else {
propName = propName.substring(1);
extensionMappings.put(propName, propVal);
}
} else {
// value is made up of an optional module name followed by colon followed by the
// FQCN of the factory
int colonIndex = propVal.lastIndexOf(COLON);
String moduleName;
String factoryName;
if (colonIndex != -1) {
moduleName = propVal.substring(0, colonIndex);
factoryName = propVal.substring(colonIndex + 1);
} else {
throw new IllegalArgumentException(
"Language mapping: " + propVal + " does not specify an implementing module");
}
LanguageImplInfo langImpl = new LanguageImplInfo(moduleName, factoryName);
languageImpls.put(propName, langImpl);
extensionMappings.put(propName, propName); // automatically register the name as a mapping
}
}
}
