Class EjsTool

src/org/opensourcephysics/tools/EjsTool.java:53–591

Utility classes to work with Ejs at a high level @author Francisco Esquembre (http://fem.um.es) @version 1.0

 * @version 1.0
 */
public class EjsTool {
	static private final String INFO_FILE = ".Ejs.txt"; //$NON-NLS-1$
	static public final String GET_MODEL_METHOD = "_getEjsModel"; //$NON-NLS-1$
	static public final String GET_RESOURCES_METHOD = "_getEjsResources"; //$NON-NLS-1$
	static public final String GET_APPLET_DIMENSION_METHOD = "_getEjsAppletDimension"; //$NON-NLS-1$
	// ---- Localization
	static private Bundle res;
	static public void setLocale(Locale locale) {
		res = ResourceLoader.getBundle(null, locale);
	}
	static {
		setLocale(null);
	}

	static public String getString(String key) {
		try {
			return res.getString(key);
		} catch (MissingResourceException e) {
			return '!' + key + '!';
		}
	}

	// --- End of localization

	/**
	 * Whether a class provides an Ejs model.
	 * 
	 * @param _ejsClass Class
	 * @return boolean
	 */
	static public boolean hasEjsModel(Class<?> _ejsClass) {
		try {
			Class<?>[] c = {};
			java.lang.reflect.Method getModelMethod = _ejsClass.getMethod(GET_MODEL_METHOD, c);
			return getModelMethod != null;
		} catch (Exception _exc) {
			return false;
		}
	}

	/**
	 * Returns the preferred dimension for the simulation's main window.
	 * 
	 * @param _ejsClass Class
	 * @return boolean
	 */
	static public java.awt.Dimension getEjsAppletDimension(Class<?> _ejsClass) {
		try {
			Class<?>[] c = {};
			java.lang.reflect.Method getDimensionMethod = _ejsClass.getMethod(GET_APPLET_DIMENSION_METHOD, c);
			if (getDimensionMethod == null) {
				return null;
			}
			Object[] o = {};
			return (java.awt.Dimension) getDimensionMethod.invoke(null, o);
		} catch (Exception _exc) {
			return null;
		}