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performance
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shiming.liu committed Oct 23, 2017
1 parent 1b5f3ec commit b0b12da
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207 changes: 112 additions & 95 deletions saluki-serializer/src/main/java/com/quancheng/saluki/serializer/utils/JReflectionUtils.java
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Original file line number Diff line number Diff line change
Expand Up @@ -4,119 +4,136 @@
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.WeakHashMap;

public class JReflectionUtils {

private JReflectionUtils(){
private static final Map<String, Map<String, Method>> METHOD_FIELD_MAP_CACHE =
Collections.synchronizedMap(new WeakHashMap<String, Map<String, Method>>());

private JReflectionUtils() {}

public static Object runGetter(Object object, Field field)
throws IllegalAccessException, IllegalArgumentException, InvocationTargetException {
final Class<?> clazz = object.getClass();
final String fieldName = field.getName();
Map<String, Method> fieldMethodMap =
METHOD_FIELD_MAP_CACHE.get(object.getClass().getCanonicalName());
if (fieldMethodMap != null) {
final Method fieldMethod = fieldMethodMap.get(fieldName);
if (fieldMethod != null) {
return fieldMethod.invoke(object);
}
} else {
fieldMethodMap = new HashMap<>();
}

public static Object runGetter(Object object, Field field) throws IllegalAccessException, IllegalArgumentException,
InvocationTargetException {
final Class<?> clazz = object.getClass();
final String fieldName = field.getName();
try {
final Method method = clazz.getMethod(JStringUtils.GET + JStringUtils.upperCaseFirst(fieldName),
new Class<?>[] {});
return method.invoke(object);
} catch (Exception e) {
// Swallow exception so that we loop through the rest.
}
for (Method method : clazz.getMethods()) {
final String methodName = method.getName();
if (((methodName.startsWith(JStringUtils.GET))
&& (methodName.length() == (fieldName.length() + JStringUtils.GET.length())))
|| ((methodName.startsWith(JStringUtils.IS))
&& (methodName.length() == (fieldName.length() + JStringUtils.IS.length())))) {
if (methodName.toLowerCase().endsWith(fieldName.toLowerCase())) {
return method.invoke(object);
}
}
}

return null;
try {
final Method method = clazz
.getMethod(JStringUtils.GET + JStringUtils.upperCaseFirst(fieldName), new Class<?>[] {});
fieldMethodMap.put(fieldName, method);
METHOD_FIELD_MAP_CACHE.put(object.getClass().getCanonicalName(), fieldMethodMap);
return method.invoke(object);
} catch (Exception e) {
// Swallow exception so that we loop through the rest.
}

public static Object runSetter(Object object, String method, Object arg,
Class<? extends Object> argClazz) throws JException {
try {
if (argClazz == null) {
argClazz = arg.getClass();
}
final Method m = object.getClass().getMethod(method, argClazz);

return m.invoke(object, arg);
} catch (Exception e) {
throw new JException(e);
for (Method method : clazz.getMethods()) {
final String methodName = method.getName();
if (((methodName.startsWith(JStringUtils.GET))
&& (methodName.length() == (fieldName.length() + JStringUtils.GET.length())))
|| ((methodName.startsWith(JStringUtils.IS))
&& (methodName.length() == (fieldName.length() + JStringUtils.IS.length())))) {
if (methodName.toLowerCase().endsWith(fieldName.toLowerCase())) {
fieldMethodMap.put(fieldName, method);
METHOD_FIELD_MAP_CACHE.put(object.getClass().getCanonicalName(), fieldMethodMap);
return method.invoke(object);
}
}
}

public static Object runMethod(Object object, String method, Object... args) throws JException {
try {
final Method m = object.getClass().getMethod(method);

return m.invoke(object, args);
} catch (Exception e) {
throw new JException(e);
}
return null;
}

public static Object runSetter(Object object, String method, Object arg,
Class<? extends Object> argClazz) throws JException {
try {
if (argClazz == null) {
argClazz = arg.getClass();
}
final Method m = object.getClass().getMethod(method, argClazz);
return m.invoke(object, arg);
} catch (Exception e) {
throw new JException(e);
}

/**
* 执行静态方法
*/
public static Object runStaticMethod(Class<?> clzz, String method, Object... args) throws JException {
try {
Class<?>[] parameterTypes = null;
if (args.length != 0) {
parameterTypes = new Class[args.length];
for (int i = 0; i < args.length; i++) {
parameterTypes[i] = args[i].getClass();
}
}
Method m;
if (parameterTypes == null) {
m = clzz.getMethod(method);
} else {
m = clzz.getMethod(method, parameterTypes);
}
return m.invoke(null, args);
} catch (Exception e) {
throw new JException(e);
}
}

public static Object runMethod(Object object, String method, Object... args) throws JException {
try {
final Method m = object.getClass().getMethod(method);
return m.invoke(object, args);
} catch (Exception e) {
throw new JException(e);
}

public static List<Field> getAllFields(List<Field> fields, Class<?> clazz) {
for (Field field : clazz.getDeclaredFields()) {
fields.add(field);
}

/**
* 执行静态方法
*/
public static Object runStaticMethod(Class<?> clzz, String method, Object... args)
throws JException {
try {
Class<?>[] parameterTypes = null;
if (args.length != 0) {
parameterTypes = new Class[args.length];
for (int i = 0; i < args.length; i++) {
parameterTypes[i] = args[i].getClass();
}
}
Method m;
if (parameterTypes == null) {
m = clzz.getMethod(method);
} else {
m = clzz.getMethod(method, parameterTypes);
}
return m.invoke(null, args);
} catch (Exception e) {
throw new JException(e);
}
}

if (clazz.getSuperclass() != null) {
fields = getAllFields(fields, clazz.getSuperclass());
}
public static List<Field> getAllFields(List<Field> fields, Class<?> clazz) {
for (Field field : clazz.getDeclaredFields()) {
fields.add(field);
}

return fields;
if (clazz.getSuperclass() != null) {
fields = getAllFields(fields, clazz.getSuperclass());
}

public static List<Method> getAllMethods(List<Method> methods, Class<?> clazz) {
for (Method method : clazz.getDeclaredMethods()) {
methods.add(method);
}
return fields;
}

if (clazz.getSuperclass() != null) {
methods = getAllMethods(methods, clazz.getSuperclass());
}
public static List<Method> getAllMethods(List<Method> methods, Class<?> clazz) {
for (Method method : clazz.getDeclaredMethods()) {
methods.add(method);
}

return methods;
if (clazz.getSuperclass() != null) {
methods = getAllMethods(methods, clazz.getSuperclass());
}

public static Method getMethodByName(Class<?> clazz, String name) {
final List<Method> methods = JReflectionUtils.getAllMethods(new ArrayList<Method>(), clazz);
return methods;
}

for (Method method : methods) {
if (method.getName().equals(name)) {
return method;
}
}
return null;
public static Method getMethodByName(Class<?> clazz, String name) {
final List<Method> methods = JReflectionUtils.getAllMethods(new ArrayList<Method>(), clazz);

for (Method method : methods) {
if (method.getName().equals(name)) {
return method;
}
}
return null;
}
}
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