if (len == 0) {
throw new MalformedPathException("empty path");
}
// check if absolute path
PathBuilder builder = new PathBuilder(factory);
int pos = 0;
if (jcrPath.charAt(0) == '/') {
if (parent != null) {
throw new MalformedPathException("'" + jcrPath + "' is not a relative path.");
}
builder.addRoot();
pos++;
}
// add master if present
if (parent != null) {
builder.addAll(parent.getElements());
}
// parse the path
int state;
if (jcrPath.charAt(0) == '[') {
if (parent != null) {
throw new MalformedPathException("'" + jcrPath + "' is not a relative path.");
}
state = STATE_IDENTIFIER;
pos++;
} else {
state = STATE_PREFIX_START;
}
int lastPos = pos;
String name = null;
int index = Path.INDEX_UNDEFINED;
boolean wasSlash = false;
boolean checkFormat = (nameResolver == null);
while (pos <= len) {
char c = pos == len ? EOF : jcrPath.charAt(pos);
pos++;
// special check for whitespace
if (c != ' ' && Character.isWhitespace(c)) {
c = '\t';
}
switch (c) {
case '/':
case EOF:
if (state == STATE_PREFIX_START && c != EOF) {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path. double slash '//' not allowed.");
}
if (state == STATE_PREFIX
|| state == STATE_NAME
|| state == STATE_INDEX_END
|| state == STATE_URI_END) {
// eof pathelement
if (name == null) {
if (wasSlash) {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path: Trailing slashes not allowed in prefixes and names.");
}
name = jcrPath.substring(lastPos, pos - 1);
}
// only add element if resolver not null. otherwise this
// is just a check for valid format.
if (checkFormat) {
NameParser.checkFormat(name);
} else {
Name qName = nameResolver.getQName(name);
builder.addLast(qName, index);
}
state = STATE_PREFIX_START;
lastPos = pos;
name = null;
index = Path.INDEX_UNDEFINED;
} else if (state == STATE_IDENTIFIER) {
if (c == EOF) {
// eof identifier reached
if (jcrPath.charAt(pos - 2) != ']') {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path: Unterminated identifier segment.");
}
String identifier = jcrPath.substring(lastPos, pos - 2);
if (checkFormat) {
if (identifierResolver != null) {
identifierResolver.checkFormat(identifier);
} // else ignore. TODO: rather throw?
} else if (identifierResolver == null) {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path: Identifier segments are not supported.");
} else if (normalizeIdentifier) {
builder.addAll(identifierResolver.getPath(identifier).getElements());
} else {
identifierResolver.checkFormat(identifier);
builder.addLast(factory.createElement(identifier));
}
state = STATE_PREFIX_START;
lastPos = pos;
}
} else if (state == STATE_DOT) {
builder.addLast(factory.getCurrentElement());
lastPos = pos;
state = STATE_PREFIX_START;
} else if (state == STATE_DOTDOT) {
builder.addLast(factory.getParentElement());
lastPos = pos;
state = STATE_PREFIX_START;
} else if (state == STATE_PREFIX_START && c == EOF) {
// ignore trailing slash
} else if (state != STATE_URI) {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path. '" + c + "' not a valid name character.");
}
break;
case '.':
if (state == STATE_PREFIX_START) {
state = STATE_DOT;
} else if (state == STATE_DOT) {
state = STATE_DOTDOT;
} else if (state == STATE_DOTDOT) {
state = STATE_PREFIX;
} else if (state == STATE_INDEX_END) {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path. '" + c + "' not valid after index. '/' expected.");
}
break;
case ':':
if (state == STATE_PREFIX_START) {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path. Prefix must not be empty");
} else if (state == STATE_PREFIX) {
if (wasSlash) {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path: Trailing slashes not allowed in prefixes and names.");
}
state = STATE_NAME_START;
// don't reset the lastPos/pos since prefix+name are passed together to the NameResolver
} else if (state == STATE_IDENTIFIER || state == STATE_URI) {
// nothing do
} else {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path. '" + c + "' not valid name character");
}
break;
case '[':
if (state == STATE_PREFIX || state == STATE_NAME) {
if (wasSlash) {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path: Trailing slashes not allowed in prefixes and names.");
}
state = STATE_INDEX;
name = jcrPath.substring(lastPos, pos - 1);
lastPos = pos;
} else if (state == STATE_IDENTIFIER) {
// nothing do
} else {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path. '" + c + "' not a valid name character.");
}
break;
case ']':
if (state == STATE_INDEX) {
try {
index = Integer.parseInt(jcrPath.substring(lastPos, pos - 1));
} catch (NumberFormatException e) {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path. NumberFormatException in index: " + jcrPath.substring(lastPos, pos - 1));
}
if (index < Path.INDEX_DEFAULT) {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path. Index number invalid: " + index);
}
state = STATE_INDEX_END;
} else if (state == STATE_IDENTIFIER) {
// nothing do
} else {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path. '" + c + "' not a valid name character.");
}
break;
case ' ':
if (state == STATE_PREFIX_START || state == STATE_NAME_START) {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path. '" + c + "' not valid name start");
} else if (state == STATE_INDEX_END) {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path. '" + c + "' not valid after index. '/' expected.");
} else if (state == STATE_DOT || state == STATE_DOTDOT) {
state = STATE_PREFIX;
}
break;
case '\t':
if (state != STATE_IDENTIFIER) {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path. Whitespace not a allowed in name.");
}
case '*':
case '|':
if (state != STATE_IDENTIFIER) {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path. '" + c + "' not a valid name character.");
}
case '{':
if (state == STATE_PREFIX_START && lastPos == pos-1) {
// '{' marks the start of a uri enclosed in an expanded name
// instead of the usual namespace prefix, if it is
// located at the beginning of a new segment.
state = STATE_URI;
} else if (state == STATE_NAME_START || state == STATE_DOT || state == STATE_DOTDOT) {
// otherwise it's part of the local name
state = STATE_NAME;
}
break;
case '}':
if (state == STATE_URI) {
state = STATE_URI_END;
}
break;
default:
if (state == STATE_PREFIX_START || state == STATE_DOT || state == STATE_DOTDOT) {
state = STATE_PREFIX;
} else if (state == STATE_NAME_START) {
state = STATE_NAME;
} else if (state == STATE_INDEX_END) {
throw new MalformedPathException("'" + jcrPath + "' is not a valid path. '" + c + "' not valid after index. '/' expected.");
}
}
wasSlash = c == ' ';
}
if (checkFormat) {
// this was only for checking the format
return null;
} else {
return builder.getPath();
}
}