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/*
* Licensed to the Nervousync Studio (NSYC) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package com.nervousync.utils;
import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.nervousync.commons.core.Globals;
/**
* @author Steven Wee [email protected]
* @version $Revision: 1.0 $ $Date: Jan 13, 2010 4:26:58 PM $
*/
public final class ReflectionUtils {
private static final Logger LOGGER = LoggerFactory.getLogger(ReflectionUtils.class);
private ReflectionUtils() {
}
/**
* Parse field name from getter/setter method name
* @param methodName method name
* @return parsed field name
*/
public static String parseFieldName(String methodName) {
String fieldName = null;
if (methodName != null) {
if (methodName.startsWith("get") || methodName.startsWith("set")) {
fieldName = methodName.substring(3);
} else if (methodName.startsWith("is")) {
fieldName = methodName.substring(2);
}
}
if (fieldName != null) {
fieldName = fieldName.substring(0, 1).toLowerCase() + fieldName.substring(1);
}
return fieldName;
}
/**
* Parse method name by given field name, field define class and method type
* @param fieldName field name
* @param fieldClass field define class
* @param methodType method type
* @see com.nervousync.utils.ReflectionUtils.MethodType
* @return parsed method name
*/
public static String parseMethodName(String fieldName, Class fieldClass, MethodType methodType) {
String methodName = null;
if (fieldName != null && fieldClass != null && methodType != null) {
switch (methodType) {
case GetMethod:
if (boolean.class.equals(fieldClass)) {
methodName = "is" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
} else {
methodName = "get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
}
break;
case SetMethod:
methodName = "set" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
break;
}
}
return methodName;
}
/**
* Retrieve child enum define in given define class
* @param enumClass Define class
* @return enum data map
*/
public static Map parseEnum(Class enumClass) {
Map enumMap = new HashMap();
if (enumClass != null && enumClass.isEnum()) {
Object[] constants = enumClass.getEnumConstants();
for (Object object : constants) {
enumMap.put(object.toString(), object);
}
}
return enumMap;
}
/**
* Retrieve all declared field names
* @param clazz Define class
* @return List of field name
*/
public static List getAllDeclaredFieldNames(Class clazz) {
if (clazz == null) {
return new ArrayList(0);
}
List fieldList = new ArrayList();
for (Field field : clazz.getDeclaredFields()) {
if ((field.getModifiers() & Modifier.STATIC) == 0) {
fieldList.add(field.getName());
}
}
if (clazz.getSuperclass() != null) {
List superFieldList = ReflectionUtils.getAllDeclaredFieldNames(clazz.getSuperclass());
for (String fieldName : superFieldList) {
if (!fieldList.contains(fieldName)) {
fieldList.add(fieldName);
}
}
}
return fieldList;
}
/**
* Attempt to find a {@link Field field} on the supplied {@link Class} with
* the supplied name. Searches all superclasses up to {@link Object}.
* @param clazz the class to introspect
* @param name the name of the field
* @return the corresponding Field object, or null if not found
*/
public static Field findField(Class clazz, String name) {
return findField(clazz, name, null);
}
/**
* Attempt to find a {@link Field field} on the supplied {@link Class} with
* the supplied name and/or {@link Class type}. Searches all
* superclasses up to {@link Object}.
* @param clazz the class to introspect
* @param name the name of the field (may be null if type is specified)
* @param type the type of the field (may be null if name is specified)
* @return the corresponding Field object, or null if not found
*/
public static Field findField(Class clazz, String name, Class type) {
if (clazz == null) {
throw new IllegalArgumentException("Class must not be null");
}
if (name == null && type == null) {
throw new IllegalArgumentException("Either name or type of the field must be specified");
}
Class searchType = clazz;
while (!Object.class.equals(searchType) && searchType != null) {
Field[] fields = searchType.getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
Field field = fields[i];
if ((name == null || name.equals(field.getName()))
&& (type == null || type.equals(field.getType()))) {
return field;
}
}
searchType = searchType.getSuperclass();
}
return null;
}
/**
* Set the field represented by the supplied {@link Field field object} on
* the specified {@link Object target object} to the specified
* value. In accordance with
* {@link Field#set(Object, Object)} semantics, the new value is
* automatically unwrapped if the underlying field has a primitive type.
* Thrown exceptions are handled via a call to
* {@link #handleReflectionException(Exception)}.
* @param field the field to set
* @param target the target object on which to set the field
* @param value the value to set; may be null
*/
public static void setField(Field field, Object target, Object value) {
try {
field.set(target, value);
}
catch (IllegalAccessException ex) {
handleReflectionException(ex);
throw new IllegalStateException(
"Unexpected reflection exception - " + ex.getClass().getName() + ": " + ex.getMessage());
}
}
/**
* Get the field represented by the supplied {@link Field field object} on
* the specified {@link Object target object}. In accordance with
* {@link Field#get(Object)} semantics, the returned value is
* automatically wrapped if the underlying field has a primitive type.
*
Thrown exceptions are handled via a call to
* {@link #handleReflectionException(Exception)}.
* @param fieldName the name of field to get
* @param target the target object from which to get the field
* @return the field's current value
*/
public static Object getFieldValue(String fieldName, Object target) {
if (fieldName == null || target == null) {
return null;
}
try {
Method getMethod = ReflectionUtils.retrieveMethod(fieldName, target.getClass(), MethodType.GetMethod);
if (getMethod != null) {
return getMethod.invoke(target, new Object[]{});
} else {
Field field = getFieldIfAvailable(target.getClass(), fieldName);
return ReflectionUtils.getFieldValue(field, target);
}
}
catch (Exception ex) {
handleReflectionException(ex);
throw new IllegalStateException(
"Unexpected reflection exception - " + ex.getClass().getName() + ": " + ex.getMessage());
}
}
/**
* Get the field represented by the supplied {@link Field field object} on
* the specified {@link Object target object}. In accordance with
* {@link Field#get(Object)} semantics, the returned value is
* automatically wrapped if the underlying field has a primitive type.
*
Thrown exceptions are handled via a call to
* {@link #handleReflectionException(Exception)}.
* @param field the field to get
* @param target the target object from which to get the field
* @return the field's current value
*/
public static Object getFieldValue(Field field, Object target) {
if (field == null || target == null) {
return null;
}
try {
makeAccessible(field);
return field.get(target);
}
catch (IllegalAccessException ex) {
handleReflectionException(ex);
throw new IllegalStateException(
"Unexpected reflection exception - " + ex.getClass().getName() + ": " + ex.getMessage());
}
}
public static Object executeMethod(String methodName, Object target)
throws IllegalArgumentException, IllegalAccessException, InvocationTargetException {
return executeMethod(methodName, target, new Class[]{}, new Object[]{});
}
public static Object executeMethod(String methodName, Object target, Class[] paramClasses, Object... args)
throws IllegalArgumentException, IllegalAccessException, InvocationTargetException {
Method method = ReflectionUtils.findMethod(target.getClass(), methodName, paramClasses);
if (method == null) {
throw new IllegalArgumentException("Method named : " + methodName + " does not exists");
}
ReflectionUtils.makeAccessible(method);
Object returnObj = null;
if (method.getReturnType().equals(void.class)) {
method.invoke(target, args);
} else {
returnObj = method.invoke(target, args);
}
return returnObj;
}
public static Constructor findConstructor(Class clazz)
throws SecurityException, NoSuchMethodException {
return clazz.getDeclaredConstructor(new Class[0]);
}
public static Constructor findConstructor(Class clazz, Class[] paramTypes)
throws SecurityException, NoSuchMethodException {
return clazz.getDeclaredConstructor(paramTypes);
}
/**
* Attempt to find a {@link Method} on the supplied class with the supplied name
* and no parameters. Searches all superclasses up to Object.
* Returns null if no {@link Method} can be found.
* @param clazz the class to introspect
* @param name the name of the method
* @return the Method object, or null if none found
*/
public static Method findMethod(Class clazz, String name) {
return findMethod(clazz, name, new Class[0]);
}
/**
* Attempt to find a {@link Method} on the supplied class with the supplied name
* and parameter types. Searches all superclasses up to Object.
*
Returns null if no {@link Method} can be found.
* @param clazz the class to introspect
* @param name the name of the method
* @param paramTypes the parameter types of the method
* (may be null to indicate any signature)
* @return the Method object, or null if none found
*/
public static Method findMethod(Class clazz, String name, Class[] paramTypes) {
if (clazz == null) {
throw new IllegalArgumentException("Class must not be null");
}
if (name == null) {
throw new IllegalArgumentException("Method name must not be null");
}
Class searchType = clazz;
while (!Object.class.equals(searchType) && searchType != null) {
Method[] methods = (searchType.isInterface() ? searchType.getMethods() : searchType.getDeclaredMethods());
for (int i = 0; i < methods.length; i++) {
Method method = methods[i];
if (name.equals(method.getName()) &&
(paramTypes == null || Arrays.equals(paramTypes, method.getParameterTypes()))) {
return method;
}
}
searchType = searchType.getSuperclass();
}
return null;
}
/**
* Invoke the specified {@link Method} against the supplied target object
* with no arguments. The target object can be null when
* invoking a static {@link Method}.
*
Thrown exceptions are handled via a call to {@link #handleReflectionException}.
* @param method the method to invoke
* @param target the target object to invoke the method on
* @return the invocation result, if any
* @see #invokeMethod(java.lang.reflect.Method, Object, Object[])
*/
public static Object invokeMethod(Method method, Object target) {
return invokeMethod(method, target, null);
}
/**
* Invoke the specified {@link Method} against the supplied target object
* with the supplied arguments. The target object can be null
* when invoking a static {@link Method}.
*
Thrown exceptions are handled via a call to {@link #handleReflectionException}.
* @param method the method to invoke
* @param target the target object to invoke the method on
* @param args the invocation arguments (may be null)
* @return the invocation result, if any
*/
public static Object invokeMethod(Method method, Object target, Object[] args) {
try {
return method.invoke(target, args);
}
catch (Exception ex) {
handleReflectionException(ex);
}
throw new IllegalStateException("Should never get here");
}
/**
* Invoke the specified JDBC API {@link Method} against the supplied
* target object with no arguments.
* @param method the method to invoke
* @param target the target object to invoke the method on
* @return the invocation result, if any
* @throws SQLException the JDBC API SQLException to rethrow (if any)
* @see #invokeJdbcMethod(java.lang.reflect.Method, Object, Object[])
*/
public static Object invokeJdbcMethod(Method method, Object target) throws SQLException {
return invokeJdbcMethod(method, target, null);
}
/**
* Invoke the specified JDBC API {@link Method} against the supplied
* target object with the supplied arguments.
* @param method the method to invoke
* @param target the target object to invoke the method on
* @param args the invocation arguments (may be null)
* @return the invocation result, if any
* @throws SQLException the JDBC API SQLException to rethrow (if any)
* @see #invokeMethod(java.lang.reflect.Method, Object, Object[])
*/
public static Object invokeJdbcMethod(Method method, Object target, Object[] args) throws SQLException {
try {
return method.invoke(target, args);
}
catch (IllegalAccessException ex) {
handleReflectionException(ex);
}
catch (InvocationTargetException ex) {
if (ex.getTargetException() instanceof SQLException) {
throw (SQLException) ex.getTargetException();
}
handleInvocationTargetException(ex);
}
throw new IllegalStateException("Should never get here");
}
/**
* Handle the given reflection exception. Should only be called if
* no checked exception is expected to be thrown by the target method.
*
Throws the underlying RuntimeException or Error in case of an
* InvocationTargetException with such a root cause. Throws an
* IllegalStateException with an appropriate message else.
* @param ex the reflection exception to handle
*/
public static void handleReflectionException(Exception ex) {
if (ex instanceof NoSuchMethodException) {
throw new IllegalStateException("Method not found: " + ex.getMessage());
}
if (ex instanceof IllegalAccessException) {
throw new IllegalStateException("Could not access method: " + ex.getMessage());
}
if (ex instanceof InvocationTargetException) {
handleInvocationTargetException((InvocationTargetException) ex);
}
if (ex instanceof RuntimeException) {
throw (RuntimeException) ex;
}
handleUnexpectedException(ex);
}
/**
* Handle the given invocation target exception. Should only be called if
* no checked exception is expected to be thrown by the target method.
*
Throws the underlying RuntimeException or Error in case of such
* a root cause. Throws an IllegalStateException else.
* @param ex the invocation target exception to handle
*/
public static void handleInvocationTargetException(InvocationTargetException ex) {
rethrowRuntimeException(ex.getTargetException());
}
/**
* Rethrow the given {@link Throwable exception}, which is presumably the
* target exception of an {@link InvocationTargetException}.
* Should only be called if no checked exception is expected to be thrown by
* the target method.
*
Rethrows the underlying exception cast to an {@link RuntimeException}
* or {@link Error} if appropriate; otherwise, throws an
* {@link IllegalStateException}.
* @param ex the exception to rethrow
* @throws RuntimeException the rethrown exception
*/
public static void rethrowRuntimeException(Throwable ex) {
if (ex instanceof RuntimeException) {
throw (RuntimeException) ex;
}
if (ex instanceof Error) {
throw (Error) ex;
}
handleUnexpectedException(ex);
}
/**
* Rethrow the given {@link Throwable exception}, which is presumably the
* target exception of an {@link InvocationTargetException}.
* Should only be called if no checked exception is expected to be thrown by
* the target method.
*
Rethrows the underlying exception cast to an {@link Exception} or
* {@link Error} if appropriate; otherwise, throws an
* {@link IllegalStateException}.
* @param ex the exception to rethrow
* @throws Exception the rethrown exception (in case of a checked exception)
*/
public static void rethrowException(Throwable ex) throws Exception {
if (ex instanceof Exception) {
throw (Exception) ex;
}
if (ex instanceof Error) {
throw (Error) ex;
}
handleUnexpectedException(ex);
}
/**
* Determine whether the given method explicitly declares the given exception
* or one of its superclasses, which means that an exception of that type
* can be propagated as-is within a reflective invocation.
* @param method the declaring method
* @param exceptionType the exception to throw
* @return true if the exception can be thrown as-is;
* false if it needs to be wrapped
*/
public static boolean declaresException(Method method, Class exceptionType) {
if (method == null) {
throw new IllegalArgumentException("Method must not be null");
}
Class[] declaredExceptions = method.getExceptionTypes();
for (int i = 0; i < declaredExceptions.length; i++) {
Class declaredException = declaredExceptions[i];
if (declaredException.isAssignableFrom(exceptionType)) {
return true;
}
}
return false;
}
/**
* Determine whether the given field is a "public" constant.
* @param field the field to check
* @return is a "public" constant.
*/
public static boolean isPublic(Field field) {
if (field != null) {
return Modifier.isPublic(field.getModifiers());
}
return Globals.DEFAULT_VALUE_BOOLEAN;
}
/**
* Determine whether the given field is a "static" constant.
* @param field the field to check
* @return is a "static" constant.
*/
public static boolean isStatic(Field field) {
if (field != null) {
return Modifier.isStatic(field.getModifiers());
}
return Globals.DEFAULT_VALUE_BOOLEAN;
}
/**
* Determine whether the given field is a "public static final" constant.
* @param field the field to check
* @return is a "public static final" constant.
*/
public static boolean isPublicStaticFinal(Field field) {
if (field != null) {
int modifiers = field.getModifiers();
return (Modifier.isPublic(modifiers) && Modifier.isStatic(modifiers) && Modifier.isFinal(modifiers));
}
return Globals.DEFAULT_VALUE_BOOLEAN;
}
/**
* Make the given field accessible, explicitly setting it accessible if necessary.
* The setAccessible(true) method is only called when actually necessary,
* to avoid unnecessary conflicts with a JVM SecurityManager (if active).
* @param field the field to make accessible
* @see java.lang.reflect.Field#setAccessible
*/
public static void makeAccessible(Field field) {
if (!Modifier.isPublic(field.getModifiers()) ||
!Modifier.isPublic(field.getDeclaringClass().getModifiers())) {
field.setAccessible(true);
}
}
/**
* Make the given method accessible, explicitly setting it accessible if necessary.
* The setAccessible(true) method is only called when actually necessary,
* to avoid unnecessary conflicts with a JVM SecurityManager (if active).
* @param method the method to make accessible
* @see java.lang.reflect.Method#setAccessible
*/
public static void makeAccessible(Method method) {
if (!Modifier.isPublic(method.getModifiers()) ||
!Modifier.isPublic(method.getDeclaringClass().getModifiers())) {
method.setAccessible(true);
}
}
/**
* Make the given constructor accessible, explicitly setting it accessible if necessary.
* The setAccessible(true) method is only called when actually necessary,
* to avoid unnecessary conflicts with a JVM SecurityManager (if active).
* @param ctor the constructor to make accessible
* @see java.lang.reflect.Constructor#setAccessible
*/
public static void makeAccessible(Constructor ctor) {
if (!Modifier.isPublic(ctor.getModifiers()) ||
!Modifier.isPublic(ctor.getDeclaringClass().getModifiers())) {
ctor.setAccessible(true);
}
}
/**
* Perform the given callback operation on all matching methods of the
* given class and superclasses.
*
The same named method occurring on subclass and superclass will
* appear twice, unless excluded by a {@link MethodFilter}.
* @param targetClass class to start looking at
* @param mc the callback to invoke for each method
* @see #doWithMethods(Class, MethodCallback, MethodFilter)
*/
public static void doWithMethods(Class targetClass, MethodCallback mc) throws IllegalArgumentException {
doWithMethods(targetClass, mc, null);
}
/**
* Perform the given callback operation on all matching methods of the
* given class and superclasses.
*
The same named method occurring on subclass and superclass will
* appear twice, unless excluded by the specified {@link MethodFilter}.
* @param targetClass class to start looking at
* @param mc the callback to invoke for each method
* @param mf the filter that determines the methods to apply the callback to
*/
public static void doWithMethods(Class targetClass, MethodCallback mc, MethodFilter mf)
throws IllegalArgumentException {
// Keep backing up the inheritance hierarchy.
do {
Method[] methods = targetClass.getDeclaredMethods();
for (int i = 0; i < methods.length; i++) {
if (mf != null && !mf.matches(methods[i])) {
continue;
}
try {
mc.doWith(methods[i]);
}
catch (IllegalAccessException ex) {
throw new IllegalStateException(
"Shouldn't be illegal to access method '" + methods[i].getName() + "': " + ex);
}
}
targetClass = targetClass.getSuperclass();
}
while (targetClass != null);
}
/**
* Get all declared methods on the leaf class and all superclasses.
* Leaf class methods are included first.
* @param leafClass leaf class
* @return All declared method arrays
*/
public static Method[] getAllDeclaredMethods(Class leafClass) throws IllegalArgumentException {
final List list = new ArrayList(32);
doWithMethods(leafClass, new MethodCallback() {
public void doWith(Method method) {
list.add(method);
}
});
return (Method[]) list.toArray(new Method[list.size()]);
}
/**
* Invoke the given callback on all fields in the target class,
* going up the class hierarchy to get all declared fields.
* @param targetClass the target class to analyze
* @param fc the callback to invoke for each field
*/
public static void doWithFields(Class targetClass, FieldCallback fc) throws IllegalArgumentException {
doWithFields(targetClass, fc, null);
}
/**
* Invoke the given callback on all fields in the target class,
* going up the class hierarchy to get all declared fields.
* @param targetClass the target class to analyze
* @param fc the callback to invoke for each field
* @param ff the filter that determines the fields to apply the callback to
*/
public static void doWithFields(Class targetClass, FieldCallback fc, FieldFilter ff)
throws IllegalArgumentException {
// Keep backing up the inheritance hierarchy.
do {
// Copy each field declared on this class unless it's static or file.
Field[] fields = targetClass.getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
// Skip static and final fields.
if (ff != null && !ff.matches(fields[i])) {
continue;
}
try {
fc.doWith(fields[i]);
}
catch (IllegalAccessException ex) {
throw new IllegalStateException(
"Shouldn't be illegal to access field '" + fields[i].getName() + "': " + ex);
}
}
targetClass = targetClass.getSuperclass();
}
while (targetClass != null && targetClass != Object.class);
}
/**
* Given the source object and the destination, which must be the same class
* or a subclass, copy all fields, including inherited fields. Designed to
* work on objects with public no-arg constructors.
* @param src source object
* @param dest target object
* @throws IllegalArgumentException if the arguments are incompatible
*/
public static void shallowCopyFieldState(final Object src, final Object dest) throws IllegalArgumentException {
if (src == null) {
throw new IllegalArgumentException("Source for field copy cannot be null");
}
if (dest == null) {
throw new IllegalArgumentException("Destination for field copy cannot be null");
}
if (!src.getClass().isAssignableFrom(dest.getClass())) {
throw new IllegalArgumentException("Destination class [" + dest.getClass().getName() +
"] must be same or subclass as source class [" + src.getClass().getName() + "]");
}
doWithFields(src.getClass(), new FieldCallback() {
public void doWith(Field field) throws IllegalArgumentException, IllegalAccessException {
makeAccessible(field);
Object srcValue = field.get(src);
field.set(dest, srcValue);
}
}, COPYABLE_FIELDS);
}
/**
* Retrieve field object if avaliable
* @param clazz Define class
* @param fieldName field name
* @return Retrieve field object or null if not exists
*/
public static Field getFieldIfAvailable(Class clazz, String fieldName) {
if (clazz == null) {
return null;
}
try {
return clazz.getDeclaredField(fieldName);
} catch (Exception e) {
return getFieldIfAvailable(clazz.getSuperclass(), fieldName);
}
}
/**
* Set field value values
* @param target target object
* @param parameterMap field value map
*/
public static void setField(Object target, Map parameterMap) {
if (target == null || parameterMap == null) {
return;
}
Iterator iterator = parameterMap.keySet().iterator();
while (iterator.hasNext()) {
String fieldName = iterator.next();
Object value = parameterMap.get(fieldName);
Object fieldValue = null;
if (value.getClass().isArray()) {
if (((Object[])value).length == 1) {
fieldValue = ((Object[])value)[0];
} else {
fieldValue = value;
}
} else {
fieldValue = value;
}
setField(fieldName, target, fieldValue);
}
}
/**
* Set field value
* @param fieldName field name
* @param target target object
* @param value field value
* @return operate result
*/
public static boolean setField(String fieldName, Object target, Object value) {
try {
Method setMethod = ReflectionUtils.retrieveMethod(fieldName, target.getClass(), MethodType.SetMethod);
if (setMethod != null) {
setMethod.invoke(target, new Object[]{value});
return true;
} else {
Field field = getFieldIfAvailable(target.getClass(), fieldName);
if (field == null) {
return false;
}
Object object = null;
if (value != null) {
Class clazz = field.getType();
if (!value.getClass().equals(clazz)) {
int length = 0;
if (value.getClass().isArray()) {
length = ((String[])value).length;
} else {
length = 1;
}
if (clazz.isArray()) {
Class arrayClass = clazz.getComponentType();
object = Array.newInstance(arrayClass, length);
if (arrayClass.isPrimitive()) {
if (arrayClass.equals(int.class)) {
if (length == 1) {
Array.set(object, 0, Integer.valueOf(value.toString()).intValue());
} else {
for (int i = 0 ; i < length ; i++) {
Array.set(object, i, Integer.valueOf(((String[])value)[i]).intValue());
}
}
} else if (arrayClass.equals(double.class)) {
if (length == 1) {
Array.set(object, 0, Double.valueOf(value.toString()).doubleValue());
} else {
for (int i = 0 ; i < length ; i++) {
Array.set(object, i, Double.valueOf(((String[])value)[i]).doubleValue());
}
}
} else if (arrayClass.equals(float.class)) {
if (length == 1) {
Array.set(object, 0, Float.valueOf(value.toString()).floatValue());
} else {
for (int i = 0 ; i < length ; i++) {
Array.set(object, i, Float.valueOf(((String[])value)[i]).floatValue());
}
}
} else if (arrayClass.equals(long.class)) {
if (length == 1) {
Array.set(object, 0, Long.valueOf(value.toString()).longValue());
} else {
for (int i = 0 ; i < length ; i++) {
Array.set(object, i, Long.valueOf(((String[])value)[i]).longValue());
}
}
} else if (arrayClass.equals(short.class)) {
if (length == 1) {
Array.set(object, 0, Short.valueOf(value.toString()).shortValue());
} else {
for (int i = 0 ; i < length ; i++) {
Array.set(object, i, Short.valueOf(((String[])value)[i]).shortValue());
}
}
} else if (arrayClass.equals(boolean.class)) {
if (length == 1) {
Array.set(object, 0, new Boolean(value.toString()).booleanValue());
} else {
for (int i = 0 ; i < length ; i++) {
Array.set(object, i, new Boolean(((String[])value)[i]).booleanValue());
}
}
}
} else {
if (arrayClass.equals(String.class)) {
if (length == 1) {
Array.set(object, 0, value.toString());
} else {
object = (String[])value;
}
} else if (arrayClass.equals(Integer.class)) {
if (length == 1) {
Array.set(object, 0, Integer.valueOf(value.toString()));
} else {
for (int i = 0 ; i < length ; i++) {
Array.set(object, i, Integer.valueOf(((String[])value)[i]));
}
}
} else if (arrayClass.equals(Float.class)) {
if (length == 1) {
Array.set(object, 0, Float.valueOf(value.toString()));
} else {
for (int i = 0 ; i < length ; i++) {
Array.set(object, i, Float.valueOf(((String[])value)[i]));
}
}
} else if (arrayClass.equals(Double.class)) {
if (length == 1) {
Array.set(object, 0, Double.valueOf(value.toString()));
} else {
for (int i = 0 ; i < length ; i++) {
Array.set(object, i, Double.valueOf(((String[])value)[i]));
}
}
} else if (arrayClass.equals(Long.class)) {
if (length == 1) {
Array.set(object, 0, Long.valueOf(value.toString()));
} else {
for (int i = 0 ; i < length ; i++) {
Array.set(object, i, Long.valueOf(((String[])value)[i]));
}
}
} else if (arrayClass.equals(Boolean.class)) {
if (length == 1) {
Array.set(object, 0, new Boolean(value.toString()));
} else {
for (int i = 0 ; i < length ; i++) {
Array.set(object, i, new Boolean(((String[])value)[i]));
}
}
} else {
if (length == 1) {
Array.set(object, 0, value);
} else {
for (int i = 0 ; i < length ; i++) {
Array.set(object, i, ((Object[])value)[i]);
}
}
}
}
} else if (clazz.isPrimitive()) {
// Basic data type int, double, float, long, short
if (clazz.equals(int.class)) {
object = Integer.valueOf(value.toString()).intValue();
} else if (clazz.equals(double.class)) {
object = Double.valueOf(value.toString()).doubleValue();
} else if (clazz.equals(float.class)) {
object = Float.valueOf(value.toString()).floatValue();
} else if (clazz.equals(long.class)) {
object = Long.valueOf(value.toString()).longValue();
} else if (clazz.equals(short.class)) {
object = Short.valueOf(value.toString()).shortValue();
} else if (clazz.equals(boolean.class)) {
object = new Boolean(value.toString()).booleanValue();
}
} else {
if (clazz.equals(Integer.class)) {
object = Integer.valueOf(value.toString());
} else if (clazz.equals(Float.class)) {
object = Float.valueOf(value.toString());
} else if (clazz.equals(Double.class)) {
object = Double.valueOf(value.toString());
} else if (clazz.equals(Long.class)) {
object = Long.valueOf(value.toString());
} else if (clazz.equals(Short.class)) {
object = Short.valueOf(value.toString());
} else if (clazz.equals(Boolean.class)) {
object = new Boolean(value.toString());
} else {
object = value;
}
}
} else {
object = value;
}
}
makeAccessible(field);
setField(field, target, object);
return true;
}
} catch (Exception e) {
if (ReflectionUtils.LOGGER.isDebugEnabled()) {
ReflectionUtils.LOGGER.debug("Convert to Object set field value error! ", e);
if (value != null) {
ReflectionUtils.LOGGER.debug(fieldName + "" + value.getClass().getName());
}
}
return false;
}
}
/**
* Throws an IllegalStateException with the given exception as root cause.
* @param ex the unexpected exception
*/
private static void handleUnexpectedException(Throwable ex) {
// Needs to avoid the chained constructor for JDK 1.4 compatibility.
IllegalStateException isex = new IllegalStateException("Unexpected exception thrown");
isex.initCause(ex);
throw isex;
}
private static Method retrieveMethod(String fieldName, Class targetClass, MethodType methodType) {
Field field = ReflectionUtils.getFieldIfAvailable(targetClass, fieldName);
if (field == null) {
return null;
}
String methodName = null;
switch(methodType) {
case GetMethod:
if (boolean.class.equals(field.getType())) {
methodName = "is" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
} else {
methodName = "get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
}
break;
case SetMethod:
methodName = "set" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
break;
}
Method method = null;
if (methodName != null) {
if (MethodType.GetMethod.equals(methodType)) {
method = ReflectionUtils.findMethod(targetClass, methodName);
} else if (MethodType.SetMethod.equals(methodType)) {
method = ReflectionUtils.findMethod(targetClass, methodName, new Class[]{field.getType()});
}
}
return method;
}
/**
* Action to take on each method.
*/
public static interface MethodCallback {
/**
* Perform an operation using the given method.
* @param method the method to operate on
* @throws IllegalArgumentException @see java.lang.IllegalArgumentException
* @throws IllegalAccessException @see java.lang.IllegalAccessException
*/
void doWith(Method method) throws IllegalArgumentException, IllegalAccessException;
}
/**
* Callback optionally used to method fields to be operated on by a method callback.
*/
public static interface MethodFilter {
/**
* Determine whether the given method matches.
* @param method the method to check
* @return check result
*/
boolean matches(Method method);
}
/**
* Callback interface invoked on each field in the hierarchy.
*/
public static interface FieldCallback {
/**
* Perform an operation using the given field.
* @param field the field to operate on
* @throws IllegalArgumentException @see java.lang.IllegalArgumentException
* @throws IllegalAccessException @see java.lang.IllegalAccessException
*/
void doWith(Field field) throws IllegalArgumentException, IllegalAccessException;
}
/**
* Callback optionally used to filter fields to be operated on by a field callback.
*/
public static interface FieldFilter {
/**
* Determine whether the given field matches.
* @param field the field to check
* @return check result
*/
boolean matches(Field field);
}
/**
* Pre-built FieldFilter that matches all non-static, non-final fields.
*/
public static FieldFilter COPYABLE_FIELDS = new FieldFilter() {
public boolean matches(Field field) {
return !(Modifier.isStatic(field.getModifiers()) ||
Modifier.isFinal(field.getModifiers()));
}
};
public enum MethodType {
GetMethod, SetMethod
}
}