/** Performs tasks to resolve the lazy instantiation. */
private synchronized void init() {
if (!initialized) {
// Mimic the behavior of XStream's JVM class
String vendor = System.getProperty("java.vm.vendor");
float version = 1.3f;
try {
version = Float.parseFloat(System.getProperty("java.version").substring(0, 3));
} catch (NumberFormatException nfe) {
// Keep the default
}
Class unsafe = null;
try {
unsafe = Class.forName("sun.misc.Unsafe", false, getClass().getClassLoader());
} catch (ClassNotFoundException cnfe) {
// Keep the default
}
ReflectionProvider reflectionProvider = null;
if ((vendor.contains("Sun")
|| vendor.contains("Oracle")
|| vendor.contains("Apple")
|| vendor.contains("Hewlett-Packard")
|| vendor.contains("IBM")
|| vendor.contains("Blackdown"))
&& version >= 1.4f
&& unsafe != null) {
try {
reflectionProvider =
(ReflectionProvider)
Class.forName(
"com.thoughtworks.xstream.converters.reflection.Sun14ReflectionProvider",
false,
getClass().getClassLoader())
.newInstance();
} catch (InstantiationException ie) {
reflectionProvider = new PureJavaReflectionProvider();
} catch (IllegalAccessException iae) {
reflectionProvider = new PureJavaReflectionProvider();
} catch (ClassNotFoundException cnfe) {
reflectionProvider = new PureJavaReflectionProvider();
}
} else {
reflectionProvider = new PureJavaReflectionProvider();
}
HierarchicalStreamDriver driver = new DomDriver();
xs = new XStream(reflectionProvider, driver);
xs.setMarshallingStrategy(new LockssReferenceByXPathMarshallingStrategy(lockssContext));
xs.registerConverter(new LockssDateConverter());
initialized = true;
}
}
private Method cacheMethod(
Object obj, String methodName, Class[] methodParameters, HashMap methodCache) {
Class objClass = obj.getClass();
Method objMethod = null;
// Look up inheritance hierarchy
while (objClass != Object.class) {
try {
objMethod = objClass.getDeclaredMethod(methodName, methodParameters);
objClass = Object.class; // executed only if call succeeds
} catch (NoSuchMethodException nsmE) {
objClass = objClass.getSuperclass();
}
}
// Cache result
if (objMethod == null) {
methodCache.put(obj.getClass(), NONE);
} else {
objMethod.setAccessible(true); // monstrous, monstrous
methodCache.put(obj.getClass(), objMethod);
}
return objMethod;
}
public boolean canConvert(Class type) {
return type.equals(Date.class);
}