public static boolean toBoolean(TemplateContext ctx, Object o) {
if (o == null) {
return false;
}
if (o instanceof Boolean) {
return (Boolean) o;
}
if (o instanceof Number) {
double d = ((Number) o).doubleValue();
return !Double.isNaN(d) && d != 0;
}
if (o instanceof Collection<?>) {
return !((Collection<?>) o).isEmpty();
}
if (o instanceof Map<?, ?>) {
return !((Map<?, ?>) o).isEmpty();
}
if (Types.isString(ctx, o)) {
return !StringUtils.isEmpty(Types.toString(ctx, o));
}
return true;
}
/** Coerces the object to the indicated type. */
public static Object coerce(TemplateContext ctx, Class<?> type, final Object o) {
Object arg;
if (o != null && type == o.getClass()) {
arg = o;
} else if (type == String.class) {
arg = Types.toString(ctx, o);
} else if (type == int.class || type == Integer.class) {
arg = Types.toInteger(ctx, o);
} else if (type == long.class || type == Long.class) {
arg = Types.toLong(ctx, o);
} else if (type == float.class
|| type == Float.class
|| type == double.class
|| type == Double.class) {
arg = Types.toDouble(ctx, o);
} else if (type == boolean.class || type == Boolean.class) {
arg = Types.toBoolean(ctx, o);
} else if (type == Iterator.class) {
arg = Types.toIterator(ctx, o);
} else {
if (o == null) {
arg = null;
} else {
final Converter<Object, Object> converter = ctx.getConverter(o.getClass(), type);
if (converter == null) {
arg = o;
} else {
try {
arg = converter.convert(o);
} catch (ConverterException e) {
ctx.warn("Conversion error", e);
return null;
}
}
}
}
return arg;
}