Class IntrospectionUtils
- java.lang.Object
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- org.apache.velocity.util.introspection.IntrospectionUtils
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public class IntrospectionUtils extends Object
- Since:
- 1.6
- Version:
- $Id: IntrospectionUtils.java 476785 2006-11-19 10:06:21Z henning $
- Author:
- Jason van Zyl, Bob McWhirter, Christoph Reck, Geir Magnusson Jr., Attila Szegedi, Nathan Bubna, Claude Brisson
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Constructor Summary
Constructors Constructor Description IntrospectionUtils()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static Class<?>
getBoxedClass(Class clazz)
returns boxed type (or input type if not a primitive type)static Class<?>
getTypeClass(Type type)
returns the Class corresponding to a Type, if possiblestatic Class<?>
getUnboxedClass(Class clazz)
returns unboxed type (or input type if not successful)static boolean
isMethodInvocationConvertible(Type formal, Class<?> actual, boolean possibleVarArg)
Determines whether a type represented by a class object is convertible to another type represented by a class object using a method invocation conversion, treating object types of primitive types as if they were primitive types (that is, a Boolean actual parameter type matches boolean primitive formal type).static boolean
isStrictMethodInvocationConvertible(Type formal, Class<?> actual, boolean possibleVarArg)
Determines whether a type represented by a class object is convertible to another type represented by a class object using a method invocation conversion, without matching object and primitive types.
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Method Detail
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getBoxedClass
public static Class<?> getBoxedClass(Class clazz)
returns boxed type (or input type if not a primitive type)- Parameters:
clazz
- input class- Returns:
- boxed class
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getUnboxedClass
public static Class<?> getUnboxedClass(Class clazz)
returns unboxed type (or input type if not successful)- Parameters:
clazz
- input class- Returns:
- unboxed class
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getTypeClass
public static Class<?> getTypeClass(Type type)
returns the Class corresponding to a Type, if possible- Parameters:
type
- the input Type- Returns:
- found Class, if any
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isMethodInvocationConvertible
public static boolean isMethodInvocationConvertible(Type formal, Class<?> actual, boolean possibleVarArg)
Determines whether a type represented by a class object is convertible to another type represented by a class object using a method invocation conversion, treating object types of primitive types as if they were primitive types (that is, a Boolean actual parameter type matches boolean primitive formal type). This behavior is because this method is used to determine applicable methods for an actual parameter list, and primitive types are represented by their object duals in reflective method calls.- Parameters:
formal
- the formal parameter type to which the actual parameter type should be convertibleactual
- the actual parameter type.possibleVarArg
- whether or not we're dealing with the last parameter in the method declaration- Returns:
- true if either formal type is assignable from actual type, or formal is a primitive type and actual is its corresponding object type or an object type of a primitive type that can be converted to the formal type.
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isStrictMethodInvocationConvertible
public static boolean isStrictMethodInvocationConvertible(Type formal, Class<?> actual, boolean possibleVarArg)
Determines whether a type represented by a class object is convertible to another type represented by a class object using a method invocation conversion, without matching object and primitive types. This method is used to determine the more specific type when comparing signatures of methods.- Parameters:
formal
- the formal parameter type to which the actual parameter type should be convertibleactual
- the actual parameter type.possibleVarArg
- whether or not we're dealing with the last parameter in the method declaration- Returns:
- true if either formal type is assignable from actual type, or formal and actual are both primitive types and actual can be subject to widening conversion to formal.
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