to.etc.util

Class RuntimeConversions

java.lang.Object

to.etc.util.RuntimeConversions

public class RuntimeConversions
extends Object

This static class contains a sh..tload of code which converts runtime objects into other objects, using generic rules for doing that. This code is shared between the EL interpreter, the NEMA template engine and the like to allow conversion of objects to other types.

Created on May 25, 2005

Author:

Frits Jalvingh

Method Summary

Modifier and Type	Method and Description
static <T> T	convertTo(Object o, Class<T> to) Converts an input type to whatever type is needed.
static <T> T	convertToArray(Class<T> totype, Object src)
static BigDecimal	convertToBigDecimal(Object in)
static BigInteger	convertToBigInteger(Object in)
static boolean	convertToBool(Object o) Convert an object to a boolean.
static Boolean	convertToBooleanWrapper(Object in)
static byte	convertToByte(Object o) Convert an object to a byte.
static Byte	convertToByteWrapper(Object in)
static char	convertToChar(Object o) Convert an object to a char.
static Character	convertToCharacterWrapper(Object in)
static <T> T	convertToComplex(Object source, Class<T> totype)
static Date	convertToDate(Object o)
static double	convertToDouble(Object o) Convert an object to a double.
static Double	convertToDoubleWrapper(Object in)
static Enum<?>	convertToEnum(Class<Enum<?>> cl, Object o)
static int	convertToInt(Object o) Convert an object to an integer.
static Integer	convertToIntegerWrapper(Object in)
static IListable<?>	convertToListable(Object o) Converts any collection-like structure to a Listable.
static long	convertToLong(Object o) Convert an object to a long.
static Long	convertToLongWrapper(Object in)
static IMappable<?,?>	convertToMappable(Object o)
static short	convertToShort(Object o) Convert an object to a Short.
static Short	convertToShortWrapper(Object in)
static String	convertToString(Object o) Converts a string.
static Object	createConcreteCollection(Class<?> ct) Create a concrete instance of some collection type, i.e.
static boolean	isBoolean(Class<?> clz)
static boolean	isByte(Class<?> clz)
static boolean	isCharacter(Class<?> clz)
static boolean	isCollectionType(Class<?> cl) Returns T if this is a supported collection type.
static boolean	isDouble(Class<?> clz)
static boolean	isEnumType(Class<?> clz)
static boolean	isFloat(Class<?> clz)
static boolean	isInt(Class<?> clz) Return T if this class is int or Integer.
static boolean	isIterable(Object val) Returns T if the object passed can be iterated over using the makeIterator call.
static boolean	isLong(Class<?> clz)
static boolean	isNumeric(Class<?> clz)
static boolean	isShort(Class<?> clz)
static boolean	isSimpleType(Class<?> clz)
static Iterator<?>	makeIterator(Object val) This creates an iterator which can iterate over the object passed.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

convertToInt

public static int convertToInt(Object o)

Convert an object to an integer. This accepts most of the base classes.

Parameters:

o -

Returns:

convertToLong

public static long convertToLong(Object o)

Convert an object to a long.

Parameters:

o -

Returns:

convertToByte

public static byte convertToByte(Object o)

Convert an object to a byte.

Parameters:

o -

Returns:

convertToShort

public static short convertToShort(Object o)

Convert an object to a Short.

Parameters:

o -

Returns:

convertToDouble

public static double convertToDouble(Object o)

Convert an object to a double.

Parameters:

o -

Returns:

convertToChar

public static char convertToChar(Object o)

Convert an object to a char.

Parameters:

o -

Returns:

convertToBool

public static boolean convertToBool(Object o)

Convert an object to a boolean.

Parameters:

o -

Returns:

convertToString

public static String convertToString(Object o)

Converts a string. The null string is converted to the empty string.

Parameters:

o -

Returns:

convertToBigDecimal

public static BigDecimal convertToBigDecimal(Object in)

convertToBigInteger

public static BigInteger convertToBigInteger(Object in)

convertToDoubleWrapper

public static Double convertToDoubleWrapper(Object in)

convertToLongWrapper

public static Long convertToLongWrapper(Object in)

convertToIntegerWrapper

public static Integer convertToIntegerWrapper(Object in)

convertToShortWrapper

public static Short convertToShortWrapper(Object in)

convertToCharacterWrapper

public static Character convertToCharacterWrapper(Object in)

convertToByteWrapper

public static Byte convertToByteWrapper(Object in)

convertToBooleanWrapper

public static Boolean convertToBooleanWrapper(Object in)

convertTo

public static final <T> T convertTo(Object o,
                                    Class<T> to)

Converts an input type to whatever type is needed.

convertToComplex

public static final <T> T convertToComplex(Object source,
                                           Class<T> totype)

convertToArray

public static <T> T convertToArray(Class<T> totype,
                                   Object src)

makeIterator

public static Iterator<?> makeIterator(Object val)
                                throws Exception

This creates an iterator which can iterate over the object passed. The object must contain some thing which allows for iteration. The following types are supported:

• array: any array type is handled by walking over it using a generated ArrayIterator. If the array is of a primitive type each element of the array gets wrapped.
• Container: any container returns it's iterator.
• Map: a Map returns it's values().iterator()

Any other type will throw a RuntimeConversionException. converts

Throws:

Exception

isIterable

public static boolean isIterable(Object val)

Returns T if the object passed can be iterated over using the makeIterator call.

Parameters:

val -

Returns:

See Also:

makeIterator(Object val)

convertToListable

public static IListable<?> convertToListable(Object o)

Converts any collection-like structure to a Listable. In addition, maps are converted to Mappable too.

Parameters:

o -

Returns:

convertToMappable

public static IMappable<?,?> convertToMappable(Object o)

convertToDate

public static Date convertToDate(Object o)

convertToEnum

public static Enum<?> convertToEnum(Class<Enum<?>> cl,
                                    Object o)

isCollectionType

public static boolean isCollectionType(Class<?> cl)

Returns T if this is a supported collection type. Collection types are Array, List, Set and Collection and concrete implementations of those.

createConcreteCollection

public static Object createConcreteCollection(Class<?> ct)

Create a concrete instance of some collection type, i.e. something implementing Collection.

Parameters:

colltype -

Returns:

isInt

public static boolean isInt(Class<?> clz)

Return T if this class is int or Integer.

Parameters:

clz -

Returns:

isLong

public static boolean isLong(Class<?> clz)

isShort

public static boolean isShort(Class<?> clz)

isByte

public static boolean isByte(Class<?> clz)

isCharacter

public static boolean isCharacter(Class<?> clz)

isDouble

public static boolean isDouble(Class<?> clz)

isFloat

public static boolean isFloat(Class<?> clz)

isBoolean

public static boolean isBoolean(Class<?> clz)

isNumeric

public static boolean isNumeric(Class<?> clz)

isSimpleType

public static boolean isSimpleType(Class<?> clz)

isEnumType

public static boolean isEnumType(Class<?> clz)