public static <T> T createFromArg(Class<T> clz, Object value) {
if (value == null) {
return null;
}
ClassMeta meta = ClassMeta.classMeta(clz);
List<ConstructorAccess> constructors = meta.oneArgumentConstructors();
if (constructors.size() == 0) {
return null;
} else if (constructors.size() == 1) {
ConstructorAccess constructorAccess = constructors.get(0);
Class<?> arg1Type = constructorAccess.parameterTypes()[0];
if (arg1Type.isInstance(value)) {
return (T) constructorAccess.create(value);
} else {
return (T) constructorAccess.create(coerce(arg1Type, value));
}
} else {
for (ConstructorAccess c : constructors) {
Class<?> arg1Type = c.parameterTypes()[0];
if (arg1Type.isInstance(value)) {
return (T) c.create(value);
}
}
for (ConstructorAccess c : constructors) {
Class<?> arg1Type = c.parameterTypes()[0];
if (arg1Type.isAssignableFrom(value.getClass())) {
return (T) c.create(value);
}
}
}
return null;
}
/**
* This flattens a list.
*
* @param o object that might be a list
* @param list list to add o to or all of o's items to.
* @return an object or a list
*/
public static Object unifyListOrArray(Object o, List list) {
if (o == null) {
return null;
}
boolean isArray = o.getClass().isArray();
if (list == null && !isArray && !(o instanceof Iterable)) {
return o;
}
if (list == null) {
list = new LinkedList();
}
if (isArray) {
int length = Array.getLength(o);
for (int index = 0; index < length; index++) {
Object o1 = Array.get(o, index);
if (o1 instanceof Iterable || o.getClass().isArray()) {
unifyListOrArray(o1, list);
} else {
list.add(o1);
}
}
} else if (o instanceof Collection) {
Collection i = ((Collection) o);
for (Object item : i) {
if (item instanceof Iterable || o.getClass().isArray()) {
unifyListOrArray(item, list);
} else {
list.add(item);
}
}
} else {
list.add(o);
}
return list;
}
/**
* Converts the value to boolean, and if it is null, it uses the default value passed.
*
* @param obj value to convert to boolean
* @param defaultValue default value
* @return obj converted to boolean
*/
public static boolean toBoolean(Object obj, boolean defaultValue) {
if (obj == null) {
return defaultValue;
}
if (obj instanceof Boolean) {
return ((Boolean) obj).booleanValue();
} else if (obj instanceof Number || obj.getClass().isPrimitive()) {
int value = toInt(obj);
return value != 0 ? true : false;
} else if (obj instanceof String || obj instanceof CharSequence) {
String str = Conversions.toString(obj);
if (str.length() == 0) {
return false;
}
if (str.equals("false")) {
return false;
} else {
return true;
}
} else if (Boon.isArray(obj)) {
return Boon.len(obj) > 0;
} else if (obj instanceof Collection) {
if (len(obj) > 0) {
List list = Lists.list((Collection) obj);
while (list.remove(null)) {}
return Lists.len(list) > 0;
} else {
return false;
}
} else {
return toBoolean(Conversions.toString(obj));
}
}
/**
* This flattens a list.
*
* @param o object that might be a list
* @param list list to add o to or all of o's items to.
* @return an object or a list
*/
public static Object unifyList(Object o, List list) {
if (o == null) {
return null;
}
if (list == null) {
list = new ArrayList();
}
if (o instanceof Iterable) {
Iterable i = ((Iterable) o);
for (Object item : i) {
unifyListOrArray(item, list);
}
} else {
list.add(o);
}
return list;
}
public static <T> T coerceWithFlag(
TypeType coerceTo, Class<T> clz, boolean[] flag, Object value) {
flag[0] = true;
if (value == null) {
return null;
}
if (clz.isInstance(value)) {
return (T) value;
}
switch (coerceTo) {
case STRING:
case CHAR_SEQUENCE:
return (T) value.toString();
case INT:
case INTEGER_WRAPPER:
Integer i = toInt(value);
if (i == Integer.MIN_VALUE) {
flag[0] = false;
}
return (T) i;
case SHORT:
case SHORT_WRAPPER:
Short s = toShort(value);
if (s == Short.MIN_VALUE) {
flag[0] = false;
}
return (T) s;
case BYTE:
case BYTE_WRAPPER:
Byte by = toByte(value);
if (by == Byte.MIN_VALUE) {
flag[0] = false;
}
return (T) by;
case CHAR:
case CHAR_WRAPPER:
Character ch = toChar(value);
if (ch == (char) 0) {
flag[0] = false;
}
return (T) ch;
case LONG:
case LONG_WRAPPER:
Long l = toLong(value);
if (l == Long.MIN_VALUE) {
flag[0] = false;
}
return (T) l;
case DOUBLE:
case DOUBLE_WRAPPER:
Double d = toDouble(value);
if (d == Double.MIN_VALUE) {
flag[0] = false;
}
return (T) d;
case FLOAT:
case FLOAT_WRAPPER:
Float f = toFloat(value);
if (f == Float.MIN_VALUE) {
flag[0] = false;
}
return (T) f;
case DATE:
return (T) toDate(value);
case BIG_DECIMAL:
return (T) toBigDecimal(value);
case BIG_INT:
return (T) toBigInteger(value);
case CALENDAR:
return (T) toCalendar(toDate(value));
case BOOLEAN:
case BOOLEAN_WRAPPER:
return (T) (Boolean) toBooleanOrDie(value);
case MAP:
return (T) toMap(value);
case ARRAY:
case ARRAY_INT:
case ARRAY_BYTE:
case ARRAY_SHORT:
case ARRAY_FLOAT:
case ARRAY_DOUBLE:
case ARRAY_LONG:
case ARRAY_STRING:
case ARRAY_OBJECT:
return toPrimitiveArrayIfPossible(clz, value);
case COLLECTION:
return toCollection(clz, value);
case INSTANCE:
if (value instanceof Map) {
return MapObjectConversion.fromMap((Map<String, Object>) value, clz);
} else if (value instanceof List) {
return MapObjectConversion.fromList((List<Object>) value, clz);
} else if (clz.isInstance(value)) {
return (T) value;
} else {
ClassMeta meta = ClassMeta.classMeta(clz);
List<ConstructorAccess> constructors = meta.oneArgumentConstructors();
if (constructors.size() == 0) {
return null;
} else if (constructors.size() == 1) {
ConstructorAccess constructorAccess = constructors.get(0);
Class<?> arg1Type = constructorAccess.parameterTypes()[0];
if (arg1Type.isInstance(value)) {
return (T) constructorAccess.create(value);
} else {
return (T) constructorAccess.create(coerce(arg1Type, value));
}
} else {
for (ConstructorAccess c : constructors) {
Class<?> arg1Type = c.parameterTypes()[0];
if (arg1Type.isInstance(value)) {
return (T) c.create(value);
}
}
for (ConstructorAccess c : constructors) {
Class<?> arg1Type = c.parameterTypes()[0];
if (arg1Type.isAssignableFrom(value.getClass())) {
return (T) c.create(value);
}
}
flag[0] = false;
break;
}
}
case ENUM:
return (T) toEnum((Class<? extends Enum>) clz, value);
case CLASS:
return (T) toClass(value);
case TIME_ZONE:
return (T) toTimeZone(flag, value);
case UUID:
return (T) toUUID(flag, value);
case CURRENCY:
return (T) toCurrency(value);
case OBJECT:
return (T) value;
default:
flag[0] = false;
break;
}
return null;
}