Package com.aspectran.core.util
Class TypeUtils
- java.lang.Object
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- com.aspectran.core.util.TypeUtils
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public abstract class TypeUtils extends java.lang.Object
Utility methods focusing on type inspection, particularly with regard to generics.
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Constructor Summary
Constructors Constructor Description TypeUtils()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static java.lang.Class<?>
getPrimitiveWrapper(java.lang.Class<?> primitiveType)
Gets the wrapper object class for the given primitive type class.static boolean
isAssignable(java.lang.Class<?> lhsType, java.lang.Class<?> rhsType)
Check if the right-hand side type may be assigned to the left-hand side type, assuming setting by reflection.static boolean
isAssignableValue(java.lang.Class<?> type, java.lang.Object value)
Determine if the given type is assignable from the given value, assuming setting by reflection.static boolean
isPrimitiveArray(java.lang.Class<?> clazz)
Check if the given class represents an array of primitives, i.e.static boolean
isPrimitiveWrapper(java.lang.Class<?> clazz)
Check if the given class represents a primitive wrapper, i.e.static boolean
isPrimitiveWrapperArray(java.lang.Class<?> clazz)
Check if the given class represents an array of primitive wrappers, i.e.static java.lang.Class<?>[]
wrappersToPrimitives(java.lang.Class<?>[] classes)
Converts the specified array of wrapper Class objects to an array of its corresponding primitive Class objects.static java.lang.Class<?>
wrapperToPrimitive(java.lang.Class<?> cls)
Converts the specified wrapper class to its corresponding primitive class.
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Method Detail
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isPrimitiveWrapper
public static boolean isPrimitiveWrapper(java.lang.Class<?> clazz)
Check if the given class represents a primitive wrapper, i.e. Boolean, Byte, Character, Short, Integer, Long, Float, or Double.- Parameters:
clazz
- the class to check- Returns:
- whether the given class is a primitive wrapper class
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isPrimitiveArray
public static boolean isPrimitiveArray(java.lang.Class<?> clazz)
Check if the given class represents an array of primitives, i.e. boolean, byte, char, short, int, long, float, or double.- Parameters:
clazz
- the class to check- Returns:
- whether the given class is a primitive array class
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isPrimitiveWrapperArray
public static boolean isPrimitiveWrapperArray(java.lang.Class<?> clazz)
Check if the given class represents an array of primitive wrappers, i.e. Boolean, Byte, Character, Short, Integer, Long, Float, or Double.- Parameters:
clazz
- the class to check- Returns:
- whether the given class is a primitive wrapper array class
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isAssignable
public static boolean isAssignable(java.lang.Class<?> lhsType, java.lang.Class<?> rhsType)
Check if the right-hand side type may be assigned to the left-hand side type, assuming setting by reflection. Considers primitive wrapper classes as assignable to the corresponding primitive types.- Parameters:
lhsType
- the target typerhsType
- the value type that should be assigned to the target type- Returns:
- if the target type is assignable from the value type
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isAssignableValue
public static boolean isAssignableValue(java.lang.Class<?> type, java.lang.Object value)
Determine if the given type is assignable from the given value, assuming setting by reflection. Considers primitive wrapper classes as assignable to the corresponding primitive types.- Parameters:
type
- the target typevalue
- the value that should be assigned to the type- Returns:
- if the type is assignable from the value
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getPrimitiveWrapper
public static java.lang.Class<?> getPrimitiveWrapper(java.lang.Class<?> primitiveType)
Gets the wrapper object class for the given primitive type class. For example, passingboolean.class
returnsBoolean.class
- Parameters:
primitiveType
- the primitive type class for which a match is to be found- Returns:
- the wrapper type associated with the given primitive or null if no match is found
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wrapperToPrimitive
public static java.lang.Class<?> wrapperToPrimitive(java.lang.Class<?> cls)
Converts the specified wrapper class to its corresponding primitive class.
This method is the counter part of
primitiveToWrapper()
. If the passed in class is a wrapper class for a primitive type, this primitive type will be returned (e.g.Integer.TYPE
forInteger.class
). For other classes, or if the parameter is null, the return value is null.- Parameters:
cls
- the class to convert, may be null- Returns:
- the corresponding primitive type if
cls
is a wrapper class, null otherwise
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wrappersToPrimitives
public static java.lang.Class<?>[] wrappersToPrimitives(java.lang.Class<?>[] classes)
Converts the specified array of wrapper Class objects to an array of its corresponding primitive Class objects.
This method invokes
wrapperToPrimitive()
for each element of the passed in array.- Parameters:
classes
- the class array to convert, may be null or empty- Returns:
- an array which contains for each given class, the primitive class or
null if the original class is not a wrapper class.
null
if null input. Empty array if an empty array passed in. - See Also:
wrapperToPrimitive(Class)
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