com.opensymphony.xwork2.conversion.impl
Class DefaultTypeConverter

java.lang.Object
  com.opensymphony.xwork2.conversion.impl.DefaultTypeConverter

All Implemented Interfaces:

TypeConverter

Direct Known Subclasses:

EnumTypeConverter, XWorkBasicConverter, XWorkConverter

public class DefaultTypeConverter
extends Object
implements TypeConverter

Default type conversion. Converts among numeric types and also strings. Contains the basic type mapping code from OGNL.

Author:

Luke Blanshard (blanshlu@netscape.net), Drew Davidson (drew@ognl.org)

Field Summary

Fields inherited from interface com.opensymphony.xwork2.conversion.TypeConverter

NO_CONVERSION_POSSIBLE, TYPE_CONVERTER_CONTEXT_KEY

Constructor Summary

DefaultTypeConverter()

Method Summary

static BigDecimal	bigDecValue(Object value) Evaluates the given object as a BigDecimal.
static BigInteger	bigIntValue(Object value) Evaluates the given object as a BigInteger.
static boolean	booleanValue(Object value) Evaluates the given object as a boolean: if it is a Boolean object, it's easy; if it's a Number or a Character, returns true for non-zero objects; and otherwise returns true for non-null objects.
Object	convertValue(Map<String,Object> context, Object value, Class toType)
Object	convertValue(Map<String,Object> context, Object target, Member member, String propertyName, Object value, Class toType) Converts the given value to a given type.
Object	convertValue(Object value, Class toType) Returns the value converted numerically to the given class type This method also detects when arrays are being converted and converts the components of one array to the type of the other.
static double	doubleValue(Object value) Evaluates the given object as a double-precision floating-point number.
Enum<?>	enumValue(Class toClass, Object o)
TypeConverter	getTypeConverter(Map<String,Object> context)
static long	longValue(Object value) Evaluates the given object as a long integer.
static String	stringValue(Object value) Evaluates the given object as a String.
static String	stringValue(Object value, boolean trim) Evaluates the given object as a String and trims it if the trim flag is true.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultTypeConverter

public DefaultTypeConverter()

Method Detail

convertValue

public Object convertValue(Map<String,Object> context,
                           Object value,
                           Class toType)

convertValue

public Object convertValue(Map<String,Object> context,
                           Object target,
                           Member member,
                           String propertyName,
                           Object value,
                           Class toType)

Description copied from interface: TypeConverter

Converts the given value to a given type. The OGNL context, target, member and name of property being set are given. This method should be able to handle conversion in general without any context, target, member or property name specified.

Specified by:

convertValue in interface TypeConverter

Parameters:

context - context under which the conversion is being done

target - target object in which the property is being set

member - member (Constructor, Method or Field) being set

propertyName - property name being set

value - value to be converted

toType - type to which value is converted

Returns:

Converted value of type toType or TypeConverter.NoConversionPossible to indicate that the conversion was not possible.

getTypeConverter

public TypeConverter getTypeConverter(Map<String,Object> context)

convertValue

public Object convertValue(Object value,
                           Class toType)

Returns the value converted numerically to the given class type This method also detects when arrays are being converted and converts the components of one array to the type of the other.

Parameters:

value - an object to be converted to the given type

toType - class type to be converted to

Returns:

converted value of the type given, or value if the value cannot be converted to the given type.

booleanValue

public static boolean booleanValue(Object value)

Evaluates the given object as a boolean: if it is a Boolean object, it's easy; if it's a Number or a Character, returns true for non-zero objects; and otherwise returns true for non-null objects.

Parameters:

value - an object to interpret as a boolean

Returns:

the boolean value implied by the given object

enumValue

public Enum<?> enumValue(Class toClass,
                         Object o)

longValue

public static long longValue(Object value)
                      throws NumberFormatException

Evaluates the given object as a long integer.

Parameters:

value - an object to interpret as a long integer

Returns:

the long integer value implied by the given object

Throws:

NumberFormatException - if the given object can't be understood as a long integer

doubleValue

public static double doubleValue(Object value)
                          throws NumberFormatException

Evaluates the given object as a double-precision floating-point number.

Parameters:

value - an object to interpret as a double

Returns:

the double value implied by the given object

Throws:

NumberFormatException - if the given object can't be understood as a double

bigIntValue

public static BigInteger bigIntValue(Object value)
                              throws NumberFormatException

Evaluates the given object as a BigInteger.

Parameters:

value - an object to interpret as a BigInteger

Returns:

the BigInteger value implied by the given object

Throws:

NumberFormatException - if the given object can't be understood as a BigInteger

bigDecValue

public static BigDecimal bigDecValue(Object value)
                              throws NumberFormatException

Evaluates the given object as a BigDecimal.

Parameters:

value - an object to interpret as a BigDecimal

Returns:

the BigDecimal value implied by the given object

Throws:

NumberFormatException - if the given object can't be understood as a BigDecimal

stringValue

public static String stringValue(Object value,
                                 boolean trim)

Evaluates the given object as a String and trims it if the trim flag is true.

Parameters:

value - an object to interpret as a String

Returns:

the String value implied by the given object as returned by the toString() method, or "null" if the object is null.

stringValue

public static String stringValue(Object value)

Evaluates the given object as a String.

Parameters:

value - an object to interpret as a String

Returns:

the String value implied by the given object as returned by the toString() method, or "null" if the object is null.