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org.nd4j.common.io.ClassUtils Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2015-2018 Skymind, Inc.
*
* This program and the accompanying materials are made available under the
* terms of the Apache License, Version 2.0 which is available at
* https://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.
*
* SPDX-License-Identifier: Apache-2.0
******************************************************************************/
package org.nd4j.common.io;
import java.beans.Introspector;
import java.lang.reflect.*;
import java.security.AccessControlException;
import java.util.*;
public abstract class ClassUtils {
public static final String ARRAY_SUFFIX = "[]";
private static final String INTERNAL_ARRAY_PREFIX = "[";
private static final String NON_PRIMITIVE_ARRAY_PREFIX = "[L";
private static final char PACKAGE_SEPARATOR = '.';
private static final char INNER_CLASS_SEPARATOR = '$';
public static final String CGLIB_CLASS_SEPARATOR = "$$";
public static final String CLASS_FILE_SUFFIX = ".class";
private static final Map, Class> primitiveWrapperTypeMap = new HashMap(8);
private static final Map primitiveTypeToWrapperMap = new HashMap(8);
private static final Map> primitiveTypeNameMap = new HashMap(32);
private static final Map> commonClassCache = new HashMap(32);
public ClassUtils() {}
private static void registerCommonClasses(Class... commonClasses) {
Class[] arr$ = commonClasses;
int len$ = commonClasses.length;
for (int i$ = 0; i$ < len$; ++i$) {
Class clazz = arr$[i$];
commonClassCache.put(clazz.getName(), clazz);
}
}
public static ClassLoader getDefaultClassLoader() {
ClassLoader cl = null;
try {
cl = Thread.currentThread().getContextClassLoader();
} catch (Throwable var2) {
;
}
if (cl == null) {
cl = ClassUtils.class.getClassLoader();
}
return cl;
}
public static ClassLoader overrideThreadContextClassLoader(ClassLoader classLoaderToUse) {
Thread currentThread = Thread.currentThread();
ClassLoader threadContextClassLoader = currentThread.getContextClassLoader();
if (classLoaderToUse != null && !classLoaderToUse.equals(threadContextClassLoader)) {
currentThread.setContextClassLoader(classLoaderToUse);
return threadContextClassLoader;
} else {
return null;
}
}
/** @deprecated */
@Deprecated
public static Class forName(String name) throws ClassNotFoundException, LinkageError {
return forName(name, getDefaultClassLoader());
}
public static Class forName(String name, ClassLoader classLoader) throws ClassNotFoundException, LinkageError {
Assert.notNull(name, "Name must not be null");
Class clazz = resolvePrimitiveClassName(name);
if (clazz == null) {
clazz = commonClassCache.get(name);
}
if (clazz != null) {
return clazz;
} else {
Class ex;
String classLoaderToUse1;
if (name.endsWith("[]")) {
classLoaderToUse1 = name.substring(0, name.length() - "[]".length());
ex = forName(classLoaderToUse1, classLoader);
return Array.newInstance(ex, 0).getClass();
} else if (name.startsWith("[L") && name.endsWith(";")) {
classLoaderToUse1 = name.substring("[L".length(), name.length() - 1);
ex = forName(classLoaderToUse1, classLoader);
return Array.newInstance(ex, 0).getClass();
} else if (name.startsWith("[")) {
classLoaderToUse1 = name.substring("[".length());
ex = forName(classLoaderToUse1, classLoader);
return Array.newInstance(ex, 0).getClass();
} else {
ClassLoader classLoaderToUse = classLoader;
if (classLoader == null) {
classLoaderToUse = getDefaultClassLoader();
}
try {
return classLoaderToUse.loadClass(name);
} catch (ClassNotFoundException var9) {
int lastDotIndex = name.lastIndexOf(46);
if (lastDotIndex != -1) {
String innerClassName =
name.substring(0, lastDotIndex) + '$' + name.substring(lastDotIndex + 1);
try {
return classLoaderToUse.loadClass(innerClassName);
} catch (ClassNotFoundException var8) {
;
}
}
throw var9;
}
}
}
}
public static Class resolveClassName(String className, ClassLoader classLoader) throws IllegalArgumentException {
try {
return forName(className, classLoader);
} catch (ClassNotFoundException var3) {
throw new IllegalArgumentException("Cannot find class [" + className + "]", var3);
} catch (LinkageError var4) {
throw new IllegalArgumentException(
"Error loading class [" + className + "]: problem with class file or dependent class.",
var4);
}
}
public static Class resolvePrimitiveClassName(String name) {
Class result = null;
if (name != null && name.length() <= 8) {
result = primitiveTypeNameMap.get(name);
}
return result;
}
/** @deprecated */
@Deprecated
public static boolean isPresent(String className) {
return isPresent(className, getDefaultClassLoader());
}
public static boolean isPresent(String className, ClassLoader classLoader) {
try {
forName(className, classLoader);
return true;
} catch (Throwable var3) {
return false;
}
}
public static Class getUserClass(Object instance) {
Assert.notNull(instance, "Instance must not be null");
return getUserClass((Class) instance.getClass());
}
public static Class getUserClass(Class clazz) {
if (clazz != null && clazz.getName().contains("$$")) {
Class superClass = clazz.getSuperclass();
if (superClass != null && !Object.class.equals(superClass)) {
return superClass;
}
}
return clazz;
}
public static boolean isCacheSafe(Class clazz, ClassLoader classLoader) {
Assert.notNull(clazz, "Class must not be null");
ClassLoader target = clazz.getClassLoader();
if (target == null) {
return false;
} else {
ClassLoader cur = classLoader;
if (classLoader == target) {
return true;
} else {
do {
if (cur == null) {
return false;
}
cur = cur.getParent();
} while (cur != target);
return true;
}
}
}
public static String getShortName(String className) {
Assert.hasLength(className, "Class name must not be empty");
int lastDotIndex = className.lastIndexOf(46);
int nameEndIndex = className.indexOf("$$");
if (nameEndIndex == -1) {
nameEndIndex = className.length();
}
String shortName = className.substring(lastDotIndex + 1, nameEndIndex);
shortName = shortName.replace('$', '.');
return shortName;
}
public static String getShortName(Class clazz) {
return getShortName(getQualifiedName(clazz));
}
public static String getShortNameAsProperty(Class clazz) {
String shortName = getShortName((Class) clazz);
int dotIndex = shortName.lastIndexOf(46);
shortName = dotIndex != -1 ? shortName.substring(dotIndex + 1) : shortName;
return Introspector.decapitalize(shortName);
}
public static String getClassFileName(Class clazz) {
Assert.notNull(clazz, "Class must not be null");
String className = clazz.getName();
int lastDotIndex = className.lastIndexOf(46);
return className.substring(lastDotIndex + 1) + ".class";
}
public static String getPackageName(Class clazz) {
Assert.notNull(clazz, "Class must not be null");
return getPackageName(clazz.getName());
}
public static String getPackageName(String fqClassName) {
Assert.notNull(fqClassName, "Class name must not be null");
int lastDotIndex = fqClassName.lastIndexOf(46);
return lastDotIndex != -1 ? fqClassName.substring(0, lastDotIndex) : "";
}
public static String getQualifiedName(Class clazz) {
Assert.notNull(clazz, "Class must not be null");
return clazz.isArray() ? getQualifiedNameForArray(clazz) : clazz.getName();
}
private static String getQualifiedNameForArray(Class clazz) {
StringBuilder result = new StringBuilder();
while (clazz.isArray()) {
clazz = clazz.getComponentType();
result.append("[]");
}
result.insert(0, clazz.getName());
return result.toString();
}
public static String getQualifiedMethodName(Method method) {
Assert.notNull(method, "Method must not be null");
return method.getDeclaringClass().getName() + "." + method.getName();
}
public static String getDescriptiveType(Object value) {
if (value == null) {
return null;
} else {
Class clazz = value.getClass();
if (Proxy.isProxyClass(clazz)) {
StringBuilder result = new StringBuilder(clazz.getName());
result.append(" implementing ");
Class[] ifcs = clazz.getInterfaces();
for (int i = 0; i < ifcs.length; ++i) {
result.append(ifcs[i].getName());
if (i < ifcs.length - 1) {
result.append(',');
}
}
return result.toString();
} else {
return clazz.isArray() ? getQualifiedNameForArray(clazz) : clazz.getName();
}
}
}
public static boolean matchesTypeName(Class clazz, String typeName) {
return typeName != null && (typeName.equals(clazz.getName()) || typeName.equals(clazz.getSimpleName())
|| clazz.isArray() && typeName.equals(getQualifiedNameForArray(clazz)));
}
public static boolean hasConstructor(Class clazz, Class... paramTypes) {
return getConstructorIfAvailable(clazz, paramTypes) != null;
}
public static Constructor getConstructorIfAvailable(Class clazz, Class... paramTypes) {
Assert.notNull(clazz, "Class must not be null");
try {
return clazz.getConstructor(paramTypes);
} catch (NoSuchMethodException var3) {
return null;
}
}
public static boolean hasMethod(Class clazz, String methodName, Class... paramTypes) {
return getMethodIfAvailable(clazz, methodName, paramTypes) != null;
}
public static Method getMethod(Class clazz, String methodName, Class... paramTypes) {
Assert.notNull(clazz, "Class must not be null");
Assert.notNull(methodName, "Method name must not be null");
if (paramTypes != null) {
try {
return clazz.getMethod(methodName, paramTypes);
} catch (NoSuchMethodException var9) {
throw new IllegalStateException("Expected method not found: " + var9);
}
} else {
HashSet candidates = new HashSet(1);
Method[] methods = clazz.getMethods();
Method[] arr$ = methods;
int len$ = methods.length;
for (int i$ = 0; i$ < len$; ++i$) {
Method method = arr$[i$];
if (methodName.equals(method.getName())) {
candidates.add(method);
}
}
if (candidates.size() == 1) {
return (Method) candidates.iterator().next();
} else if (candidates.isEmpty()) {
throw new IllegalStateException("Expected method not found: " + clazz + "." + methodName);
} else {
throw new IllegalStateException("No unique method found: " + clazz + "." + methodName);
}
}
}
public static Method getMethodIfAvailable(Class clazz, String methodName, Class... paramTypes) {
Assert.notNull(clazz, "Class must not be null");
Assert.notNull(methodName, "Method name must not be null");
if (paramTypes != null) {
try {
return clazz.getMethod(methodName, paramTypes);
} catch (NoSuchMethodException var9) {
return null;
}
} else {
HashSet candidates = new HashSet(1);
Method[] methods = clazz.getMethods();
Method[] arr$ = methods;
int len$ = methods.length;
for (int i$ = 0; i$ < len$; ++i$) {
Method method = arr$[i$];
if (methodName.equals(method.getName())) {
candidates.add(method);
}
}
if (candidates.size() == 1) {
return (Method) candidates.iterator().next();
} else {
return null;
}
}
}
public static int getMethodCountForName(Class clazz, String methodName) {
Assert.notNull(clazz, "Class must not be null");
Assert.notNull(methodName, "Method name must not be null");
int count = 0;
Method[] declaredMethods = clazz.getDeclaredMethods();
Method[] ifcs = declaredMethods;
int arr$ = declaredMethods.length;
int len$;
for (len$ = 0; len$ < arr$; ++len$) {
Method i$ = ifcs[len$];
if (methodName.equals(i$.getName())) {
++count;
}
}
Class[] var9 = clazz.getInterfaces();
Class[] var10 = var9;
len$ = var9.length;
for (int var11 = 0; var11 < len$; ++var11) {
Class ifc = var10[var11];
count += getMethodCountForName(ifc, methodName);
}
if (clazz.getSuperclass() != null) {
count += getMethodCountForName(clazz.getSuperclass(), methodName);
}
return count;
}
public static boolean hasAtLeastOneMethodWithName(Class clazz, String methodName) {
Assert.notNull(clazz, "Class must not be null");
Assert.notNull(methodName, "Method name must not be null");
Method[] declaredMethods = clazz.getDeclaredMethods();
Method[] ifcs = declaredMethods;
int arr$ = declaredMethods.length;
int len$;
for (len$ = 0; len$ < arr$; ++len$) {
Method i$ = ifcs[len$];
if (i$.getName().equals(methodName)) {
return true;
}
}
Class[] var8 = clazz.getInterfaces();
Class[] var9 = var8;
len$ = var8.length;
for (int var10 = 0; var10 < len$; ++var10) {
Class ifc = var9[var10];
if (hasAtLeastOneMethodWithName(ifc, methodName)) {
return true;
}
}
return clazz.getSuperclass() != null && hasAtLeastOneMethodWithName(clazz.getSuperclass(), methodName);
}
public static Method getMostSpecificMethod(Method method, Class targetClass) {
if (method != null && isOverridable(method, targetClass) && targetClass != null
&& !targetClass.equals(method.getDeclaringClass())) {
try {
if (Modifier.isPublic(method.getModifiers())) {
try {
return targetClass.getMethod(method.getName(), method.getParameterTypes());
} catch (NoSuchMethodException var3) {
return method;
}
}
Method ex = ReflectionUtils.findMethod(targetClass, method.getName(), method.getParameterTypes());
return ex != null ? ex : method;
} catch (AccessControlException var4) {
;
}
}
return method;
}
private static boolean isOverridable(Method method, Class targetClass) {
return Modifier.isPrivate(method.getModifiers()) ? false
: (!Modifier.isPublic(method.getModifiers()) && !Modifier.isProtected(method.getModifiers())
? getPackageName((Class) method.getDeclaringClass())
.equals(getPackageName(targetClass))
: true);
}
public static Method getStaticMethod(Class clazz, String methodName, Class... args) {
Assert.notNull(clazz, "Class must not be null");
Assert.notNull(methodName, "Method name must not be null");
try {
Method ex = clazz.getMethod(methodName, args);
return Modifier.isStatic(ex.getModifiers()) ? ex : null;
} catch (NoSuchMethodException var4) {
return null;
}
}
public static boolean isPrimitiveWrapper(Class clazz) {
Assert.notNull(clazz, "Class must not be null");
return primitiveWrapperTypeMap.containsKey(clazz);
}
public static boolean isPrimitiveOrWrapper(Class clazz) {
Assert.notNull(clazz, "Class must not be null");
return clazz.isPrimitive() || isPrimitiveWrapper(clazz);
}
public static boolean isPrimitiveArray(Class clazz) {
Assert.notNull(clazz, "Class must not be null");
return clazz.isArray() && clazz.getComponentType().isPrimitive();
}
public static boolean isPrimitiveWrapperArray(Class clazz) {
Assert.notNull(clazz, "Class must not be null");
return clazz.isArray() && isPrimitiveWrapper(clazz.getComponentType());
}
public static Class resolvePrimitiveIfNecessary(Class clazz) {
Assert.notNull(clazz, "Class must not be null");
return clazz.isPrimitive() && clazz != Void.TYPE ? (Class) primitiveTypeToWrapperMap.get(clazz) : clazz;
}
public static boolean isAssignable(Class lhsType, Class rhsType) {
Assert.notNull(lhsType, "Left-hand side opType must not be null");
Assert.notNull(rhsType, "Right-hand side opType must not be null");
if (lhsType.isAssignableFrom(rhsType)) {
return true;
} else {
Class resolvedWrapper;
if (lhsType.isPrimitive()) {
resolvedWrapper = primitiveWrapperTypeMap.get(rhsType);
if (resolvedWrapper != null && lhsType.equals(resolvedWrapper)) {
return true;
}
} else {
resolvedWrapper = (Class) primitiveTypeToWrapperMap.get(rhsType);
if (resolvedWrapper != null && lhsType.isAssignableFrom(resolvedWrapper)) {
return true;
}
}
return false;
}
}
public static boolean isAssignableValue(Class type, Object value) {
Assert.notNull(type, "Type must not be null");
return value != null ? isAssignable(type, value.getClass()) : !type.isPrimitive();
}
public static String convertResourcePathToClassName(String resourcePath) {
Assert.notNull(resourcePath, "Resource path must not be null");
return resourcePath.replace('/', '.');
}
public static String convertClassNameToResourcePath(String className) {
Assert.notNull(className, "Class name must not be null");
return className.replace('.', '/');
}
public static String addResourcePathToPackagePath(Class clazz, String resourceName) {
Assert.notNull(resourceName, "Resource name must not be null");
return !resourceName.startsWith("/") ? classPackageAsResourcePath(clazz) + "/" + resourceName
: classPackageAsResourcePath(clazz) + resourceName;
}
public static String classPackageAsResourcePath(Class clazz) {
if (clazz == null) {
return "";
} else {
String className = clazz.getName();
int packageEndIndex = className.lastIndexOf(46);
if (packageEndIndex == -1) {
return "";
} else {
String packageName = className.substring(0, packageEndIndex);
return packageName.replace('.', '/');
}
}
}
public static String classNamesToString(Class... classes) {
return classNamesToString((Collection) Arrays.asList(classes));
}
public static String classNamesToString(Collection classes) {
if (CollectionUtils.isEmpty(classes)) {
return "[]";
} else {
StringBuilder sb = new StringBuilder("[");
Iterator it = classes.iterator();
while (it.hasNext()) {
Class clazz = (Class) it.next();
sb.append(clazz.getName());
if (it.hasNext()) {
sb.append(", ");
}
}
sb.append("]");
return sb.toString();
}
}
public static Class[] toClassArray(Collection> collection) {
return collection == null ? null : collection.toArray(new Class[collection.size()]);
}
public static Class[] getAllInterfaces(Object instance) {
Assert.notNull(instance, "Instance must not be null");
return getAllInterfacesForClass(instance.getClass());
}
public static Class[] getAllInterfacesForClass(Class clazz) {
return getAllInterfacesForClass(clazz, null);
}
public static Class[] getAllInterfacesForClass(Class clazz, ClassLoader classLoader) {
Set ifcs = getAllInterfacesForClassAsSet(clazz, classLoader);
return (Class[]) ifcs.toArray(new Class[ifcs.size()]);
}
public static Set getAllInterfacesAsSet(Object instance) {
Assert.notNull(instance, "Instance must not be null");
return getAllInterfacesForClassAsSet(instance.getClass());
}
public static Set getAllInterfacesForClassAsSet(Class clazz) {
return getAllInterfacesForClassAsSet(clazz, null);
}
public static Set getAllInterfacesForClassAsSet(Class clazz, ClassLoader classLoader) {
Assert.notNull(clazz, "Class must not be null");
if (clazz.isInterface() && isVisible(clazz, classLoader)) {
return Collections.singleton(clazz);
} else {
LinkedHashSet interfaces;
for (interfaces = new LinkedHashSet(); clazz != null; clazz = clazz.getSuperclass()) {
Class[] ifcs = clazz.getInterfaces();
Class[] arr$ = ifcs;
int len$ = ifcs.length;
for (int i$ = 0; i$ < len$; ++i$) {
Class ifc = arr$[i$];
interfaces.addAll(getAllInterfacesForClassAsSet(ifc, classLoader));
}
}
return interfaces;
}
}
public static Class createCompositeInterface(Class[] interfaces, ClassLoader classLoader) {
Assert.notEmpty(interfaces, "Interfaces must not be empty");
Assert.notNull(classLoader, "ClassLoader must not be null");
return Proxy.getProxyClass(classLoader, interfaces);
}
public static boolean isVisible(Class clazz, ClassLoader classLoader) {
if (classLoader == null) {
return true;
} else {
try {
Class ex = classLoader.loadClass(clazz.getName());
return clazz == ex;
} catch (ClassNotFoundException var3) {
return false;
}
}
}
public static boolean isCglibProxy(Object object) {
return isCglibProxyClass(object.getClass());
}
public static boolean isCglibProxyClass(Class clazz) {
return clazz != null && isCglibProxyClassName(clazz.getName());
}
public static boolean isCglibProxyClassName(String className) {
return className != null && className.contains("$$");
}
static {
primitiveWrapperTypeMap.put(Boolean.class, Boolean.TYPE);
primitiveWrapperTypeMap.put(Byte.class, Byte.TYPE);
primitiveWrapperTypeMap.put(Character.class, Character.TYPE);
primitiveWrapperTypeMap.put(Double.class, Double.TYPE);
primitiveWrapperTypeMap.put(Float.class, Float.TYPE);
primitiveWrapperTypeMap.put(Integer.class, Integer.TYPE);
primitiveWrapperTypeMap.put(Long.class, Long.TYPE);
primitiveWrapperTypeMap.put(Short.class, Short.TYPE);
Iterator, Class>> primitiveTypes = primitiveWrapperTypeMap.entrySet().iterator();
while (primitiveTypes.hasNext()) {
Map.Entry i$ = primitiveTypes.next();
primitiveTypeToWrapperMap.put(i$.getValue(), i$.getKey());
registerCommonClasses(new Class[] {(Class) i$.getKey()});
}
HashSet primitiveTypes1 = new HashSet(32);
primitiveTypes1.addAll(primitiveWrapperTypeMap.values());
primitiveTypes1.addAll(Arrays.asList(new Class[] {boolean[].class, byte[].class, char[].class, double[].class,
float[].class, int[].class, long[].class, short[].class}));
primitiveTypes1.add(Void.TYPE);
Iterator i$1 = primitiveTypes1.iterator();
while (i$1.hasNext()) {
Class primitiveType = (Class) i$1.next();
primitiveTypeNameMap.put(primitiveType.getName(), primitiveType);
}
registerCommonClasses(new Class[] {Boolean[].class, Byte[].class, Character[].class, Double[].class,
Float[].class, Integer[].class, Long[].class, Short[].class});
registerCommonClasses(new Class[] {Number.class, Number[].class, String.class, String[].class, Object.class,
Object[].class, Class.class, Class[].class});
registerCommonClasses(new Class[] {Throwable.class, Exception.class, RuntimeException.class, Error.class,
StackTraceElement.class, StackTraceElement[].class});
}
}
