public static Iterator<?> toIterator(TemplateContext ctx, Object o) {
if (o == null) {
return IteratorUtils.NULL_ITERATOR;
}
if (o instanceof Iterator<?>) {
return (Iterator<?>) o;
}
if (o instanceof Iterable<?>) {
return ((Iterable<?>) o).iterator();
}
if (o instanceof Map<?, ?>) {
return IteratorUtils.toIterator((Map<?, ?>) o);
}
if (isString(ctx, o)) {
return IteratorUtils.toIterator(toString(ctx, o));
}
if (isArray(ctx, o)) {
return IteratorUtils.toIteratorArray(o);
}
if (o instanceof Enumeration<?>) {
return Iterators.forEnumeration((Enumeration<?>) o);
}
ctx.warn("Cannot iterate over object of type " + o.getClass());
return IteratorUtils.NULL_ITERATOR;
}
/** 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;
}
