com.restfb.util
Class ReflectionUtils

java.lang.Object
  com.restfb.util.ReflectionUtils

public final class ReflectionUtils
extends Object

A collection of reflection-related utility methods.

Since:

1.6

Author:

Mark Allen, Igor Kabiljo, Scott Hernandez

Nested Class Summary

static class

ReflectionUtils.FieldWithAnnotation<T extends Annotation> A field/annotation pair.

Method Summary

static boolean	equals(Object object1, Object object2) Reflection-based implementation of Object.equals(Object).
static <T extends Annotation> List<ReflectionUtils.FieldWithAnnotation<T>>	findFieldsWithAnnotation(Class<?> type, Class<T> annotationType) Finds fields on the given type and all of its superclasses annotated with annotations of type annotationType.
static List<Method>	getAccessors(Class<?> clazz) Gets all accessor methods for the given clazz.
static Class<?>	getFirstParameterizedTypeArgument(Field field) For a given field, get its first parameterized type argument.
static int	hashCode(Object object) Reflection-based implementation of Object.hashCode().
static boolean	isPrimitive(Object object) Is the given object a primitive type or wrapper for a primitive type?
static String	toString(Object object) Reflection-based implementation of Object.toString().

Methods inherited from class java.lang.Object

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

Method Detail

isPrimitive

public static boolean isPrimitive(Object object)

Is the given object a primitive type or wrapper for a primitive type?

Parameters:

object - The object to check for primitive-ness.

Returns:

true if object is a primitive type or wrapper for a primitive type, false otherwise.

findFieldsWithAnnotation

public static <T extends Annotation> List<ReflectionUtils.FieldWithAnnotation<T>> findFieldsWithAnnotation(Class<?> type,
                                                                                                           Class<T> annotationType)

Finds fields on the given type and all of its superclasses annotated with annotations of type annotationType.

Type Parameters:

T - The annotation type.

Parameters:

type - The target type token.

annotationType - The annotation type token.

Returns:

A list of field/annotation pairs.

getFirstParameterizedTypeArgument

public static Class<?> getFirstParameterizedTypeArgument(Field field)

For a given field, get its first parameterized type argument.

For example, a field of type List<Long> would have a first type argument of Long.class.

If the field has no type arguments, null is returned.

Parameters:

field - The field to check.

Returns:

The field's first parameterized type argument, or null if none exists.

getAccessors

public static List<Method> getAccessors(Class<?> clazz)

Gets all accessor methods for the given clazz.

Parameters:

clazz - The class for which accessors are extracted.

Returns:

All accessor methods for the given clazz.

toString

public static String toString(Object object)

Reflection-based implementation of Object.toString().

Parameters:

object - The object to convert to a string representation.

Returns:

A string representation of object.

Throws:

IllegalStateException - If an error occurs while performing reflection operations.

hashCode

public static int hashCode(Object object)

Reflection-based implementation of Object.hashCode().

Parameters:

object - The object to hash.

Returns:

A hashcode for object.

Throws:

IllegalStateException - If an error occurs while performing reflection operations.

equals

public static boolean equals(Object object1,
                             Object object2)

Reflection-based implementation of Object.equals(Object).

Parameters:

object1 - One object to compare.

object2 - Another object to compare.

Returns:

true if the objects are equal, false otherwise.

Throws:

IllegalStateException - If an error occurs while performing reflection operations.