aQute.lib.utf8properties.PropertiesParser Maven / Gradle / Ivy
package aQute.lib.utf8properties;
import java.util.Collection;
import java.util.Collections;
import java.util.Properties;
import aQute.lib.hex.Hex;
import aQute.lib.strings.Strings;
import aQute.service.reporter.Reporter;
import aQute.service.reporter.Reporter.SetLocation;
final class PropertiesParser {
private final char[] source;
private final int length;
private final Reporter reporter;
private final String file;
private static final char MIN_DELIMETER = '\t';
private static final char MAX_DELIMETER = '\\';
private final static byte[] INFO = new byte[MAX_DELIMETER + 1];
private final static byte WS = 1;
private final static byte KEY = 2;
private final static byte LINE = 4;
private final static byte NOKEY = 8;
static {
INFO['\t'] = KEY + WS;
INFO['\n'] = KEY + LINE;
INFO['\f'] = KEY + WS;
INFO[' '] = KEY + WS;
INFO[','] = NOKEY;
INFO[';'] = NOKEY;
INFO['!'] = NOKEY;
INFO['\''] = NOKEY;
INFO['"'] = NOKEY;
INFO['#'] = NOKEY;
INFO['('] = NOKEY;
INFO[')'] = NOKEY;
INFO[':'] = KEY;
INFO['='] = KEY;
INFO['\\'] = NOKEY;
}
private int n = 0;
private int line = 0;
private int pos = -1;
private int marker = 0;
private char current;
private Properties properties;
private boolean validKey;
private boolean continuation = true;
private final Collection syntaxHeaders;
PropertiesParser(String source, String file, Reporter reporter, Properties properties,
Collection syntaxHeaders) {
this.source = source.toCharArray();
this.file = file;
this.reporter = reporter;
this.length = this.source.length;
this.properties = properties;
this.syntaxHeaders = (syntaxHeaders != null) ? syntaxHeaders : Collections.emptySet();
}
boolean hasNext() {
return n < length;
}
char next() {
if (n >= length)
return current = '\n';
current = source[n++];
try {
switch (current) {
case '\\' :
if (continuation) {
char p = peek();
if (p == '\r' || p == '\n') {
next(); // skip line ending
next(); // first character on new line
skipWhitespace();
}
}
return current;
case '\r' :
current = '\n';
if (peek() == '\n') {
n++;
}
line++;
pos = -1;
return current;
case '\n' :
if (peek() == '\r') {
// a bit weird, catches \n\r
n++;
}
line++;
pos = -1;
return current;
case '\t' :
case '\f' :
return current;
default :
if (current < ' ') {
error("Invalid character in properties: %x at pos %s", Integer.valueOf(current), pos);
return current = '?';
}
return current;
}
} finally {
pos++;
}
}
void skip(byte delimeters) {
while (isIn(delimeters)) {
next();
}
}
char peek() {
if (hasNext())
return source[n];
else
return '\n';
}
void parse() {
while (hasNext()) {
marker = n;
next();
skipWhitespace();
if (isEmptyOrComment(current)) {
skipLine();
continue;
}
this.validKey = true;
String key = key();
if (!validKey) {
error("Invalid property key: `%s`", key);
}
skipWhitespace();
if (current == ':' || current == '=') {
next();
skipWhitespace();
if (current == '\n') {
properties.put(key, "");
continue;
}
}
if (current != '\n') {
String value = token(LINE, isSyntaxHeader(key));
properties.put(key, value);
} else {
error("No value specified for key: %s. An empty value should be specified as '%' :
case '\u00bb' : // Guillemet double >>
case '\u203a' : // Guillemet single >
expectDelimeter = false;
break;
// other delimiters
case ';' :
case ',' :
case '=' :
case ':' :
expectDelimeter = false;
break;
default :
if (expectDelimeter) {
error("Expected a delimeter, like comma or semicolon, after a quoted string but found '%s'",
tmp);
expectDelimeter = false;
}
break;
}
}
sb.append(tmp);
next();
}
return sb.toString();
}
private boolean isQuote(char tmp) {
return tmp == '\'' || tmp == '"';
}
private boolean isEven(int count) {
return (count & 1) == 0;
}
private int countBackslashesAtEnd(StringBuilder sb) {
int n = 0;
int r = sb.length();
while (--r >= 0) {
if (sb.charAt(r) != '\\') {
return n;
}
n++;
}
return n;
}
private void invalidWhitespace(int quote, String type) {
if (quote == 0)
error("Non breaking space found [%s] at (line=%s,pos=%s)", type, line, pos);
}
private String key() {
StringBuilder sb = new StringBuilder();
while (!isIn(KEY)) {
if (isIn(NOKEY))
validKey = false;
char tmp = current;
if (tmp == '\\') {
tmp = backslash();
if (tmp == 0) // we hit \\n\n
break;
}
sb.append(tmp);
next();
}
return sb.toString();
}
private boolean isIn(byte delimeters) {
if (current < MIN_DELIMETER || current > MAX_DELIMETER)
return false;
return (INFO[current] & delimeters) != 0;
}
private char backslash() {
char c;
c = next();
switch (c) {
case '\n' :
return 0;
case 'u' :
StringBuilder sb = new StringBuilder();
c = 0;
for (int i = 0; i < 4; i++) {
sb.append(next());
}
String unicode = sb.toString();
if (!Hex.isHex(unicode)) {
error("Invalid unicode string \\u%s", sb);
return '?';
} else {
return (char) Integer.parseInt(unicode, 16);
}
case ':' :
case '=' :
return c;
case 't' :
return '\t';
case 'f' :
return '\f';
case 'r' :
return '\r';
case 'n' :
return '\n';
case '\\' :
return '\\';
case '\f' :
case '\t' :
case ' ' :
error("Found \\. This is allowed in a properties file but not in bnd to prevent mistakes");
return c;
default :
return c;
}
}
private void error(String msg, Object... args) {
if (reporter != null) {
int line = this.line;
String context = context();
SetLocation loc;
loc = reporter.warning("%s: <<%s>>", Strings.format(msg, args), context);
loc.line(line);
loc.context(context);
if (file != null)
loc.file(file);
loc.length(context.length());
}
}
private String context() {
int loc = n;
while (loc < length && source[loc] != '\n')
loc++;
return new String(source, marker, loc - marker);
}
}