Package com.cedarsoftware.util

Class ReflectionUtils

java.lang.Object

com.cedarsoftware.util.ReflectionUtils

public final class ReflectionUtils
extends Object

Author:

John DeRegnaucourt ([email protected])
Copyright (c) Cedar Software LLC

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Method Summary

Modifier and Type	Method	Description
static <T extends Annotation> T	getClassAnnotation(Class<?> classToCheck, Class<T> annoClass)	Determine if the passed in class (classToCheck) has the annotation (annoClass) on itself, any of its super classes, any of it's interfaces, or any of it's super interfaces.
static String	getClassName(Object o)	Return the name of the class on the object, or "null" if the object is null.
static String	getClassNameFromByteCode(byte[] byteCode)
static void	getDeclaredFields(Class<?> c, Collection<Field> fields)	Get all non static, non transient, fields of the passed in class, including private fields.
static Map<String,Field>	getDeepDeclaredFieldMap(Class<?> c)	Return all Fields from a class (including inherited), mapped by String field name to java.lang.reflect.Field.
static Collection<Field>	getDeepDeclaredFields(Class<?> c)	Get all non static, non transient, fields of the passed in class, including private fields.
static Method	getMethod(Class<?> c, String method, Class<?>... types)
static <T extends Annotation> T	getMethodAnnotation(Method method, Class<T> annoClass)

Methods inherited from class java.lang.Object

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

Method Detail

getClassAnnotation

public static <T extends Annotation> T getClassAnnotation(Class<?> classToCheck,
                                                          Class<T> annoClass)

Determine if the passed in class (classToCheck) has the annotation (annoClass) on itself, any of its super classes, any of it's interfaces, or any of it's super interfaces. This is a exhaustive check throughout the complete inheritance hierarchy.

Returns:

the Annotation if found, null otherwise.

getMethodAnnotation

public static <T extends Annotation> T getMethodAnnotation(Method method,
                                                           Class<T> annoClass)

getMethod

public static Method getMethod(Class<?> c,
                               String method,
                               Class<?>... types)

getDeepDeclaredFields

public static Collection<Field> getDeepDeclaredFields(Class<?> c)

Get all non static, non transient, fields of the passed in class, including private fields. Note, the special this$ field is also not returned. The result is cached in a static ConcurrentHashMap to benefit execution performance.

Parameters:

c - Class instance

Returns:

Collection of only the fields in the passed in class that would need further processing (reference fields). This makes field traversal on a class faster as it does not need to continually process known fields like primitives.

getDeclaredFields

public static void getDeclaredFields(Class<?> c,
                                     Collection<Field> fields)

Get all non static, non transient, fields of the passed in class, including private fields. Note, the special this$ field is also not returned. The resulting fields are stored in a Collection.

Parameters:

c - Class instance that would need further processing (reference fields). This makes field traversal on a class faster as it does not need to continually process known fields like primitives.

getDeepDeclaredFieldMap

public static Map<String,Field> getDeepDeclaredFieldMap(Class<?> c)

Return all Fields from a class (including inherited), mapped by String field name to java.lang.reflect.Field.

Parameters:

c - Class whose fields are being fetched.

Returns:

Map of all fields on the Class, keyed by String field name to java.lang.reflect.Field.

getClassName

public static String getClassName(Object o)

Return the name of the class on the object, or "null" if the object is null.

Parameters:

o - Object to get the class name.

Returns:

String name of the class or "null"

getClassNameFromByteCode

public static String getClassNameFromByteCode(byte[] byteCode)
                                       throws Exception

Throws:

Exception