/**
* Retrieves the specified value. Throws an error if value cannot be read.
*
* @param key key
* @param c expected type
* @return result
*/
private Object get(final Object[] key, final Class<?> c) {
final Object entry = props.get(key[0].toString());
if (entry == null) Util.notexpected("Property " + key[0] + " not defined.");
final Class<?> cc = entry.getClass();
if (c != cc) Util.notexpected("Property '" + key[0] + "' is a " + Util.name(cc));
return entry;
}
/** Constructor, initializing the default options. */
protected AProp() {
try {
for (final Field f : getClass().getFields()) {
final Object obj = f.get(null);
if (!(obj instanceof Object[])) continue;
final Object[] arr = (Object[]) obj;
props.put(arr[0].toString(), arr[1]);
}
} catch (final Exception ex) {
Util.notexpected(ex);
}
}
/**
* Sets the specified value after casting it to the correct type.
*
* @param key key
* @param val value
* @return final value, or {@code null} if the key has not been found
*/
public final synchronized String set(final String key, final String val) {
final Object type = get(key);
if (type == null) return null;
String v = val;
if (type instanceof Boolean) {
final boolean b = val == null || val.isEmpty() ? !((Boolean) type) : Util.yes(val);
setObject(key, b);
v = Util.flag(b);
} else if (type instanceof Integer) {
setObject(key, Integer.parseInt(val));
v = String.valueOf(get(key));
} else if (type instanceof String) {
setObject(key, val);
} else {
Util.notexpected("Unknown property type: " + type.getClass().getSimpleName());
}
return v;
}
/**
* Reads the configuration file and initializes the project properties. The file is located in the
* project home directory.
*
* @param prop property file extension
*/
protected synchronized void read(final String prop) {
file = new IOFile(HOME + IO.BASEXSUFFIX + prop);
final StringList read = new StringList();
final TokenBuilder err = new TokenBuilder();
if (!file.exists()) {
err.addExt("Saving properties in \"%\"..." + NL, file);
} else {
BufferedReader br = null;
try {
br = new BufferedReader(new FileReader(file.file()));
for (String line; (line = br.readLine()) != null; ) {
line = line.trim();
if (line.isEmpty() || line.charAt(0) == '#') continue;
final int d = line.indexOf('=');
if (d < 0) {
err.addExt("%: \"%\" ignored. " + NL, file, line);
continue;
}
final String val = line.substring(d + 1).trim();
String key = line.substring(0, d).trim();
// extract numeric value in key
int num = 0;
final int ss = key.length();
for (int s = 0; s < ss; ++s) {
if (Character.isDigit(key.charAt(s))) {
num = Integer.parseInt(key.substring(s));
key = key.substring(0, s);
break;
}
}
read.add(key);
final Object entry = props.get(key);
if (entry == null) {
err.addExt("%: \"%\" not found. " + NL, file, key);
} else if (entry instanceof String) {
props.put(key, val);
} else if (entry instanceof Integer) {
props.put(key, Integer.parseInt(val));
} else if (entry instanceof Boolean) {
props.put(key, Boolean.parseBoolean(val));
} else if (entry instanceof String[]) {
if (num == 0) {
props.put(key, new String[Integer.parseInt(val)]);
} else {
((String[]) entry)[num - 1] = val;
}
} else if (entry instanceof int[]) {
((int[]) entry)[num] = Integer.parseInt(val);
}
}
} catch (final Exception ex) {
err.addExt("% could not be parsed." + NL, file);
Util.debug(ex);
} finally {
if (br != null)
try {
br.close();
} catch (final IOException ex) {
}
}
}
// check if all mandatory files have been read
try {
if (err.isEmpty()) {
boolean ok = true;
for (final Field f : getClass().getFields()) {
final Object obj = f.get(null);
if (!(obj instanceof Object[])) continue;
final String key = ((Object[]) obj)[0].toString();
ok &= read.contains(key);
}
if (!ok) err.addExt("Saving properties in \"%\"..." + NL, file);
}
} catch (final IllegalAccessException ex) {
Util.notexpected(ex);
}
if (!err.isEmpty()) {
Util.err(err.toString());
write();
}
}