org.kohsuke.accmod.restrictions.ProtectedExternally Maven / Gradle / Ivy
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* The MIT License
*
* Copyright 2017 CloudBees, Inc.
*
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package org.kohsuke.accmod.restrictions;
import java.io.IOException;
import java.io.InputStream;
import java.lang.annotation.Inherited;
import java.util.Arrays;
import java.util.concurrent.atomic.AtomicBoolean;
import org.kohsuke.accmod.Restricted;
import org.kohsuke.accmod.impl.ErrorListener;
import org.kohsuke.accmod.impl.Location;
import org.kohsuke.accmod.impl.RestrictedElement;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.Opcodes;
/**
* A method which may be implemented/overridden from anywhere, including {@code super} calls, but may not be otherwise called outside the source module.
* Akin to using the {@code protected} modifier but allowing “package” access elsewhere in the same package root, and also supporting interface methods.
* Note that {@link Restricted} is not {@link Inherited} so this only protects attempted accesses via the defining type;
* you will generally also want to restrict the implementations (for example as {@link DoNotUse}).
* @since FIXME
*/
public class ProtectedExternally extends None {
@Override
public void invoked(Location loc, RestrictedElement target, ErrorListener errorListener) {
if (target.isInTheInspectedModule()) {
return;
}
try (InputStream is = loc.getDependencyClassLoader().getResourceAsStream(loc.getClassName().replace('.', '/') + ".class")) {
if (is == null) {
errorListener.onError(null, loc, "could not find class");
return;
}
ClassReader cr = new ClassReader(is);
final AtomicBoolean ok = new AtomicBoolean();
final String supe = target.toString().replaceFirst("[.].+$", "");
cr.accept(new ClassVisitor(Opcodes.ASM5) {
@Override
public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
// TODO traverse supertype hierarchy recursively
if (supe.equals(superName) || interfaces != null && Arrays.asList(interfaces).contains(supe)) {
ok.set(true);
}
}
}, ClassReader.SKIP_FRAMES);
if (ok.get()) {
return;
}
} catch (IOException x) {
errorListener.onError(x, loc, "cannot inspect caller");
return;
}
errorListener.onError(null, loc, target + " must not be called except as if protected");
}
}
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