public static ResourcePath parse(String pathString) {
String rootElement;
int lastIndex;
if (pathString.startsWith(WINDOWS_NETWORK_ROOT)) {
rootElement = WINDOWS_NETWORK_ROOT;
lastIndex = 2;
} else if (pathString.startsWith("/")) {
rootElement = "";
lastIndex = 1;
} else {
char first = pathString.charAt(0);
if (pathString.length() > 1 && pathString.charAt(1) == ':' && Character.isLetter(first)) {
rootElement = Character.toUpperCase(first) + ":";
lastIndex = 2;
if (pathString.length() > 2
&& (pathString.charAt(2) == '/' || pathString.charAt(2) == '\\')) {
lastIndex = 3;
}
} else {
throw new IllegalArgumentException(
"The path string ["
+ pathString
+ "] is not an absolute path starting at a drive root");
}
}
DynamicArray<String> results = tokenizePathFragment(pathString, lastIndex);
results = normalizePath(results);
return construct(rootElement, results, results.size() - 1);
}
private static DynamicArray<String> tokenizePathFragment(String pathString, int lastIndex) {
DynamicArray<String> results = new DynamicArray<String>();
for (int i = lastIndex; i < pathString.length(); i++) {
char c = pathString.charAt(i);
if (c == '/' || c == '\\') {
results.add(pathString.substring(lastIndex, i));
lastIndex = i + 1;
}
}
pathString = pathString.substring(lastIndex);
results.add(pathString);
return results;
}
private static DynamicArray<String> normalizePath(DynamicArray<String> pathElements) {
DynamicArray<String> results = new DynamicArray<String>(pathElements.size());
for (int i = 0; i < pathElements.size; i++) {
String s = (String) pathElements.data[i];
if (s.equals(".") || s.equals("/") || s.equals("\\") || s.equals("")) {
// no-op
} else if (s.equals("..")) {
// TODO - Throw if no more elements
results.remove(results.size() - 1);
} else {
results.add(s);
}
}
return results;
}
private static String[] split(String fqn) {
String theRest = fqn;
DynamicArray<String> parts = new DynamicArray<String>();
while (theRest != null) {
int iParam = theRest.indexOf('<');
int iDot = theRest.indexOf('.');
int iArray = theRest.indexOf('[');
String part;
if (iParam == 0) {
if (iArray > 0) {
part = theRest.substring(0, iArray);
theRest = iArray < theRest.length() ? theRest.substring(iArray) : null;
} else {
if (theRest.charAt(theRest.length() - 1) != '>') {
throw new RuntimeException("\"" + theRest + "\" does not end with '>'");
}
part = theRest;
theRest = null;
}
} else if (iArray == 0) {
part = theRest.substring(0, 2);
theRest = part.length() == theRest.length() ? null : theRest.substring(2);
} else if (iParam > 0) {
if (iDot > 0 && iDot < iParam) {
part = theRest.substring(0, iDot);
theRest = iDot + 1 < theRest.length() ? theRest.substring(iDot + 1) : null;
} else {
part = theRest.substring(0, iParam);
theRest = iParam < theRest.length() ? theRest.substring(iParam) : null;
}
} else if (iDot > 0) {
part = theRest.substring(0, iDot);
theRest = iDot + 1 < theRest.length() ? theRest.substring(iDot + 1) : null;
} else {
part = theRest;
theRest = null;
}
parts.add(StringCache.get(part));
}
return parts.toArray(new String[parts.size()]);
}