/** Transfers variables from one interpreter's bindings to another. */
private void copyBindings(final ScriptInterpreter src, final ScriptInterpreter dest) {
if (src == null) return; // nothing to copy
final Bindings srcBindings = src.getBindings();
final Bindings destBindings = dest.getBindings();
for (final String key : src.getBindings().keySet()) {
final Object value = src.getLanguage().decode(srcBindings.get(key));
destBindings.put(key, value);
}
}
/** Lists variables in the script context. */
public void vars() {
if (interpreter == null) return; // no active script language
final List<String> keys = new ArrayList<>();
final List<Object> types = new ArrayList<>();
final Bindings bindings = interpreter.getBindings();
for (final String key : bindings.keySet()) {
final Object value = bindings.get(key);
keys.add(key);
types.add(type(value));
}
printColumns(keys, types);
}
/** Outputs a greeting, and sets up the initial language of the REPL. */
public void initialize() {
out.println("Welcome to the SciJava REPL!");
out.println();
help();
final List<ScriptLanguage> langs = getInterpretedLanguages();
if (langs.isEmpty()) {
out.println("--------------------------------------------------------------");
out.println("Uh oh! There are no SciJava script languages available!");
out.println("Are any on your classpath? E.g.: org.scijava:scripting-groovy?");
out.println("--------------------------------------------------------------");
out.println();
return;
}
out.println("Have fun!");
out.println();
lang(langs.get(0).getLanguageName());
populateBindings(interpreter.getBindings());
}