Class NativeJSON

rhino/src/main/java/org/mozilla/javascript/NativeJSON.java:30–606

This class implements the JSON native object. See ECMA 15.12. @author Matthew Crumley, Raphael Speyer

 * @author Matthew Crumley, Raphael Speyer
 */
public final class NativeJSON extends ScriptableObject {
    @Serial private static final long serialVersionUID = -4567599697595654984L;

    private static final String JSON_TAG = "JSON";

    private static final int MAX_STRINGIFY_GAP_LENGTH = 10;

    private static final ClassDescriptor DESCRIPTION;

    static {
        DESCRIPTION =
                new ClassDescriptor.Builder(JSON_TAG)
                        .withMethod(CTOR, "parse", 2, NativeJSON::parse)
                        .withMethod(CTOR, "stringify", 3, NativeJSON::stringify)
                        .withProp(CTOR, "toSource", value("JSON"))
                        .withProp(
                                CTOR, SymbolKey.TO_STRING_TAG, value(JSON_TAG, DONTENUM | READONLY))
                        .build();
    }

    static Object init(Context cx, VarScope scope, boolean sealed) {
        return DESCRIPTION.populateGlobal(cx, scope, new NativeJSON(), sealed);
    }

    private NativeJSON() {}

    @Override
    public String getClassName() {
        return "JSON";
    }

    private static Object parse(
            Context cx, JSFunction f, Object nt, VarScope s, Object thisObj, Object[] args) {
        String jtext = ScriptRuntime.toString(args, 0);
        Object reviver = null;
        if (args.length > 1) {
            reviver = args[1];
        }
        if (reviver instanceof Callable) {
            return parse(cx, f.getDeclarationScope(), jtext, (Callable) reviver);
        }
        return parse(cx, f.getDeclarationScope(), jtext);
    }

    private static Object stringify(
            Context cx, JSFunction f, Object nt, VarScope s, Object thisObj, Object[] args) {
        Object value = Undefined.instance, replacer = null, space = null;

        if (args.length > 0) {
            value = args[0];
            if (args.length > 1) {
                replacer = args[1];
                if (args.length > 2) {
                    space = args[2];
                }
            }
        }
        return stringify(cx, s, value, replacer, space);