package lombok.bytecode;
import static lombok.bytecode.AsmUtil.*;
import java.util.concurrent.atomic.AtomicBoolean;
import lombok.core.DiagnosticsReceiver;
import lombok.core.PostCompilerTransformation;
import org.mangosdk.spi.ProviderFor;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
@ProviderFor(PostCompilerTransformation.class)
public class PreventNullAnalysisRemover implements PostCompilerTransformation {
@Override public byte[] applyTransformations(byte[] original, String fileName, DiagnosticsReceiver diagnostics) {
if (!new ClassFileMetaData(original).usesMethod("lombok/Lombok", "preventNullAnalysis")) return null;
byte[] fixedByteCode = fixJSRInlining(original);
ClassReader reader = new ClassReader(fixedByteCode);
ClassWriter writer = new FixedClassWriter(reader, 0);
final AtomicBoolean changesMade = new AtomicBoolean();
class PreventNullAnalysisVisitor extends MethodVisitor {
PreventNullAnalysisVisitor(MethodVisitor mv) {
super(Opcodes.ASM7, mv);
}
@Override public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean itf) {
boolean hit = true;
if (hit && opcode != Opcodes.INVOKESTATIC) hit = false;
if (hit && !"preventNullAnalysis".equals(name)) hit = false;
if (hit && !"lombok/Lombok".equals(owner)) hit = false;
if (hit && !"(Ljava/lang/Object;)Ljava/lang/Object;".equals(desc)) hit = false;
if (hit) {
changesMade.set(true);
if (System.getProperty("lombok.debugAsmOnly", null) != null) super.visitMethodInsn(opcode, owner, name, desc, itf);
} else {
super.visitMethodInsn(opcode, owner, name, desc, itf);
}
}
}
reader.accept(new ClassVisitor(Opcodes.ASM7, writer) {
@Override public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
return new PreventNullAnalysisVisitor(super.visitMethod(access, name, desc, signature, exceptions));
}
}, 0);
return changesMade.get() ? writer.toByteArray() : null;
}
}