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Auto-templating for rewrite-java.
/*
* Copyright (C) 2018-2019 The Project Lombok Authors.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package org.openrewrite.java.template.internal;
import java.lang.reflect.*;
// sunapi suppresses javac's warning about using Unsafe; 'all' suppresses eclipse's warning about the unspecified 'sunapi' key. Leave them both.
// Yes, javac's definition of the word 'all' is quite contrary to what the dictionary says it means. 'all' does NOT include 'sunapi' according to javac.
@SuppressWarnings({"sunapi", "all"})
public final class Permit {
private Permit() {
}
public static T setAccessible(T accessor) {
accessor.setAccessible(true);
return accessor;
}
static class Fake {
boolean override;
Object accessCheckCache;
}
public static Method getMethod(Class c, String mName, Class... parameterTypes) throws NoSuchMethodException {
Method m = null;
Class oc = c;
while (c != null) {
try {
m = c.getDeclaredMethod(mName, parameterTypes);
break;
} catch (NoSuchMethodException e) {
}
c = c.getSuperclass();
}
if (m == null) {
throw new NoSuchMethodException(oc.getName() + " :: " + mName + "(args)");
}
return setAccessible(m);
}
public static Field getField(Class c, String fName) throws NoSuchFieldException {
Field f = null;
Class oc = c;
while (c != null) {
try {
f = c.getDeclaredField(fName);
break;
} catch (NoSuchFieldException e) {
}
c = c.getSuperclass();
}
if (f == null) {
throw new NoSuchFieldException(oc.getName() + " :: " + fName);
}
return setAccessible(f);
}
public static Field permissiveGetField(Class c, String fName) {
try {
return getField(c, fName);
} catch (Exception ignore) {
return null;
}
}
public static T permissiveReadField(Class type, Field f, Object instance) {
try {
return type.cast(f.get(instance));
} catch (Exception ignore) {
return null;
}
}
public static Constructor getConstructor(Class c, Class... parameterTypes) throws NoSuchMethodException {
return setAccessible(c.getDeclaredConstructor(parameterTypes));
}
private static Object reflectiveStaticFieldAccess(Class c, String fName) {
try {
Field f = c.getDeclaredField(fName);
f.setAccessible(true);
return f.get(null);
} catch (Exception e) {
return null;
}
}
public static boolean isDebugReflection() {
return !"false".equals(System.getProperty("lombok.debug.reflection", "false"));
}
public static void handleReflectionDebug(Throwable t, Throwable initError) {
if (!isDebugReflection()) {
return;
}
System.err.println("** LOMBOK REFLECTION exception: " + t.getClass() + ": " + (t.getMessage() == null ? "(no message)" : t.getMessage()));
t.printStackTrace(System.err);
if (initError != null) {
System.err.println("*** ADDITIONALLY, exception occurred setting up reflection: ");
initError.printStackTrace(System.err);
}
}
public static Object invoke(Method m, Object receiver, Object... args) throws IllegalAccessException, InvocationTargetException {
return invoke(null, m, receiver, args);
}
public static Object invoke(Throwable initError, Method m, Object receiver, Object... args) throws IllegalAccessException, InvocationTargetException {
try {
return m.invoke(receiver, args);
} catch (IllegalAccessException e) {
handleReflectionDebug(e, initError);
throw e;
} catch (RuntimeException e) {
handleReflectionDebug(e, initError);
throw e;
} catch (Error e) {
handleReflectionDebug(e, initError);
throw e;
}
}
public static Object invokeSneaky(Method m, Object receiver, Object... args) {
return invokeSneaky(null, m, receiver, args);
}
public static Object invokeSneaky(Throwable initError, Method m, Object receiver, Object... args) {
try {
return m.invoke(receiver, args);
} catch (NoClassDefFoundError e) {
handleReflectionDebug(e, initError);
//ignore, we don't have access to the correct ECJ classes, so lombok can't possibly
//do anything useful here.
return null;
} catch (NullPointerException e) {
handleReflectionDebug(e, initError);
//ignore, we don't have access to the correct ECJ classes, so lombok can't possibly
//do anything useful here.
return null;
} catch (IllegalAccessException e) {
handleReflectionDebug(e, initError);
throw sneakyThrow(e);
} catch (InvocationTargetException e) {
throw sneakyThrow(e.getCause());
} catch (RuntimeException e) {
handleReflectionDebug(e, initError);
throw e;
} catch (Error e) {
handleReflectionDebug(e, initError);
throw e;
}
}
public static T newInstance(Constructor c, Object... args) throws IllegalAccessException, InvocationTargetException, InstantiationException {
return newInstance(null, c, args);
}
public static T newInstance(Throwable initError, Constructor c, Object... args) throws IllegalAccessException, InvocationTargetException, InstantiationException {
try {
return c.newInstance(args);
} catch (IllegalAccessException e) {
handleReflectionDebug(e, initError);
throw e;
} catch (InstantiationException e) {
handleReflectionDebug(e, initError);
throw e;
} catch (RuntimeException e) {
handleReflectionDebug(e, initError);
throw e;
} catch (Error e) {
handleReflectionDebug(e, initError);
throw e;
}
}
public static T newInstanceSneaky(Constructor c, Object... args) {
return newInstanceSneaky(null, c, args);
}
public static T newInstanceSneaky(Throwable initError, Constructor c, Object... args) {
try {
return c.newInstance(args);
} catch (NoClassDefFoundError e) {
handleReflectionDebug(e, initError);
//ignore, we don't have access to the correct ECJ classes, so lombok can't possibly
//do anything useful here.
return null;
} catch (NullPointerException e) {
handleReflectionDebug(e, initError);
//ignore, we don't have access to the correct ECJ classes, so lombok can't possibly
//do anything useful here.
return null;
} catch (IllegalAccessException e) {
handleReflectionDebug(e, initError);
throw sneakyThrow(e);
} catch (InstantiationException e) {
handleReflectionDebug(e, initError);
throw sneakyThrow(e);
} catch (InvocationTargetException e) {
throw sneakyThrow(e.getCause());
} catch (RuntimeException e) {
handleReflectionDebug(e, initError);
throw e;
} catch (Error e) {
handleReflectionDebug(e, initError);
throw e;
}
}
public static Object get(Field f, Object receiver) throws IllegalAccessException {
try {
return f.get(receiver);
} catch (IllegalAccessException e) {
handleReflectionDebug(e, null);
throw e;
} catch (RuntimeException e) {
handleReflectionDebug(e, null);
throw e;
} catch (Error e) {
handleReflectionDebug(e, null);
throw e;
}
}
public static void set(Field f, Object receiver, Object newValue) throws IllegalAccessException {
try {
f.set(receiver, newValue);
} catch (IllegalAccessException e) {
handleReflectionDebug(e, null);
throw e;
} catch (RuntimeException e) {
handleReflectionDebug(e, null);
throw e;
} catch (Error e) {
handleReflectionDebug(e, null);
throw e;
}
}
public static void reportReflectionProblem(Throwable initError, String msg) {
if (!isDebugReflection()) {
return;
}
System.err.println("** REFLECTION issue: " + msg);
if (initError != null) {
System.err.println("*** ADDITIONALLY, exception occurred setting up reflection: ");
initError.printStackTrace(System.err);
}
}
public static RuntimeException sneakyThrow(Throwable t) {
if (t == null) {
throw new NullPointerException("t");
}
return Permit.sneakyThrow0(t);
}
@SuppressWarnings("unchecked")
private static T sneakyThrow0(Throwable t) throws T {
throw (T) t;
}
}