/**
* Output usage message flag listing.
*
* @param subclassOpts array containing flag and description pairs
*/
protected void outputFlags(String[][] subclassOpts) {
// Build options list
final ArrayList<String[]> optionList = new ArrayList<>();
// Add options directly supported by AbstractMain
optionList.addAll(
Arrays.<String[]>asList(
new String[][] {
{"--classpath, -cp path", "Append to the classpath (useful with `java -jar ...')"},
{"--read-only, -ro", "Disallow database modifications"},
{"--new-schema", "Allow recording of a new database schema version"},
{
"--schema-version, -v num",
"Specify database schema version (default highest recorded)"
},
{
"--model-pkg package",
"Scan for @JSimpleClass model classes under Java package (=> JSimpleDB mode)"
},
{
"--type-pkg package",
"Scan for @JFieldType types under Java package to register custom types"
},
{"--pkg, -p package", "Equivalent to `--model-pkg package --type-pkg package'"},
{"--help, -h", "Show this help message"},
{"--verbose", "Show verbose error messages"},
}));
// Add options supported by the various key/value implementations
final KVImplementation[] kvs = KVImplementation.getImplementations();
for (KVImplementation kv : kvs)
optionList.addAll(Arrays.<String[]>asList(kv.getCommandLineOptions()));
// Add options supported by subclass
if (subclassOpts != null) optionList.addAll(Arrays.<String[]>asList(subclassOpts));
// Sort options
Collections.sort(
optionList,
new Comparator<String[]>() {
@Override
public int compare(String[] opt1, String[] opt2) {
return opt1[0].compareTo(opt2[0]);
}
});
// Display all supported options
int width = 0;
for (String[] opt : optionList) width = Math.max(width, opt[0].length());
for (String[] opt : optionList)
System.err.println(String.format(" %-" + width + "s %s", opt[0], opt[1]));
// Display additional usage text
for (KVImplementation kv : kvs) {
final String usageText = kv.getUsageText();
if (usageText != null) System.err.println(usageText.trim());
}
}
