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/*
* Artifactural
* Copyright (c) 2018.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version 2.1
* of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package net.minecraftforge.artifactural.gradle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodHandles.Lookup;
import java.lang.invoke.VarHandle;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
public class ModifierAccess {
private static VarHandle MODIFIER_ACCESS = null;
private static boolean accessAttempted = false;
public static synchronized boolean definalize(Field target) {
if ((target.getModifiers() & Modifier.FINAL) == 0) {
return true;
}
if (MODIFIER_ACCESS == null && !accessAttempted) {
try {
Lookup lookup = MethodHandles.privateLookupIn(Field.class, MethodHandles.lookup());
MODIFIER_ACCESS = lookup.findVarHandle(Field.class, "modifiers", int.class);
} catch (NoSuchFieldException | IllegalAccessException e) {
throw new RuntimeException("Could not access Field.modifiers to definalize reflection object. Use Java 8, current version: " + System.getProperty("java.version"), e);
}
accessAttempted = true;
}
if (MODIFIER_ACCESS != null) {
try {
MODIFIER_ACCESS.set(target, target.getModifiers() & ~Modifier.FINAL);
} catch (IllegalArgumentException e) {
throw new RuntimeException("Could not definalize field " + target.getDeclaringClass().getName() + "." + target.getName(), e);
}
return true;
}
return false;
}
}
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