private Boolean getBooleanImpl(String propertyName) {
String value = props.getString(propertyName);
if (value != null) {
Boolean result = Parse.parseBoolean(value, messageBundle);
if (result != null) {
return result;
}
props.remove(propertyName);
}
value = props.getString(propertyName);
if (value != null) {
Boolean result = Parse.parseBoolean(value, null);
if (result != null) {
return result;
}
throwBrokenDefault(propertyName, value);
}
return null;
}
public static void main(String[] args) {
// read name of source file from command line
String simplfile = args[0];
// filename for output is basename.svml
StringTokenizer st = new StringTokenizer(simplfile, ".");
String classname = st.nextToken();
String svmlfile = classname + ".svml";
try {
// parse simPL expression
Expression simpl = Parse.fromFileName(simplfile);
try {
Type t = simpl.check(new TypeEnvironment());
System.out.println("Well-typed with type: " + t);
} catch (TypeError e) {
System.out.println(e);
}
/*
* simPL input: 'simpl' is a valid simpl program that has been type
* checked.
*/
INSTRUCTION[] ia = new Compiler(simpl).compile();
Compiler.displayInstructionArray(ia);
try {
// create object output stream
ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(svmlfile));
// and write resulting instruction array to output stream
oos.writeObject(ia);
oos.close();
// indicate successful compilation to user
System.out.println("sVML code written to " + svmlfile);
} catch (Exception ex) {
System.out.println("\ncannot write virtual machine code " + ex);
}
}
// Lexical errors are treated nicely, giving an
// error message with line and character of the
// error (unfortunately, parse errors do not enjoy
// such treatment yet)
catch (SyntaxError e) {
try {
System.out.println(e);
FileReader fr = new FileReader(simplfile);
BufferedReader br = new BufferedReader(fr);
String record = null;
int line = e.line;
int column = e.column;
int lineCount = 0;
int columnCount = 0;
while ((record = br.readLine()) != null & lineCount++ < line) ;
System.out.println(record);
while (columnCount++ != column) System.out.print(" ");
System.out.println("^");
} catch (Exception ex) {
System.out.println(e);
}
} catch (FileNotFoundException e) {
System.out.println(e);
} catch (Exception e) {
System.out.println(e);
}
}