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BeanUtils library is a Java bean copy utility with powerful functionality and high performance.
/*
BeanUtils Version 1.0.0
Created by yangtu222 on 2017.08.05
Distributed under the permissive zlib License
Get the latest version from here:
https://github.com/yangtu222/BeanUtils
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
package com.tuyang.beanutils.internal.utils;
import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.ref.WeakReference;
import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.IdentityHashMap;
import java.util.Map;
public class PropertyUtils {
private static Map, WeakReference> cacheMap = new HashMap<>();
public static PropertyDescriptor getPropertyDescriptor(Class clazz, String propertyName) {
PropertyDescriptor[] allPds = null;
synchronized (cacheMap) {
WeakReference pdsRef = cacheMap.get(clazz);
if( pdsRef != null ) {
allPds = pdsRef.get();
}
}
if( allPds == null ) {
allPds = getPropertyDescriptors(clazz);
}
for( PropertyDescriptor pd : allPds ) {
if( propertyName.equals(pd.getName() ) ) {
return pd;
}
}
return null;
}
public static PropertyDescriptor[] getPropertyDescriptors(Class clazz) {
PropertyDescriptor[] allPds = null;
synchronized (cacheMap) {
WeakReference pdsRef = cacheMap.get(clazz);
if( pdsRef != null ) {
allPds = pdsRef.get();
if( allPds != null )
return allPds;
}
}
try {
BeanInfo beanInfo = Introspector.getBeanInfo(clazz);
allPds = beanInfo.getPropertyDescriptors();
synchronized (cacheMap) {
cacheMap.put(clazz, new WeakReference(allPds));
}
return allPds;
} catch (IntrospectionException e) {
return new PropertyDescriptor[0];
}
}
public static Field getClassField(Class targetClass, Class optionClass, String propertyName) {
Field propertyField = null;
if( optionClass != null ) {
try {
propertyField = optionClass.getDeclaredField(propertyName);
} catch (NoSuchFieldException | SecurityException e) {
}
}
if( propertyField == null ) {
Class tryClass = targetClass;
while( tryClass != null ) {
try {
propertyField = tryClass.getDeclaredField(propertyName);
return propertyField;
} catch (NoSuchFieldException | SecurityException e) {
tryClass = tryClass.getSuperclass();
}
}
}
return propertyField;
}
public static boolean isInterfaceType(Class classType, Class interfaceType) {
if( classType.equals(interfaceType) ) {
return true;
}
while( classType != null ) {
Class[] interfaces = classType.getInterfaces();
for( Class interClass : interfaces ) {
if( interClass.equals(interfaceType) ) {
return true;
}
}
classType = classType.getSuperclass();
}
return false;
}
private static final Map, Class> primitiveWrapperTypeMap = new IdentityHashMap, Class>(8);
static {
primitiveWrapperTypeMap.put(Boolean.class, boolean.class);
primitiveWrapperTypeMap.put(Byte.class, byte.class);
primitiveWrapperTypeMap.put(Character.class, char.class);
primitiveWrapperTypeMap.put(Double.class, double.class);
primitiveWrapperTypeMap.put(Float.class, float.class);
primitiveWrapperTypeMap.put(Integer.class, int.class);
primitiveWrapperTypeMap.put(Long.class, long.class);
primitiveWrapperTypeMap.put(Short.class, short.class);
}
public static boolean isPrimitive(Class classType) {
if( classType.isPrimitive() )
return true;
for( Class resolvedWrapper : primitiveWrapperTypeMap.keySet() ) {
if( classType.equals(resolvedWrapper) ) {
return true;
}
}
if( classType.equals(String.class ) )
return true;
return false;
}
public static boolean isAssignable(Class lhsType, Class rhsType) {
if (lhsType.isAssignableFrom(rhsType)) {
return true;
}
if (lhsType.isPrimitive()) {
Class resolvedPrimitive = primitiveWrapperTypeMap.get(rhsType);
if (lhsType == resolvedPrimitive) {
return true;
}
}
else if( rhsType.isPrimitive() ) {
Class resolvedPrimitive = primitiveWrapperTypeMap.get(lhsType);
if (rhsType == resolvedPrimitive) {
return true;
}
}
return false;
}
}