net.bytebuddy.agent.builder

Enum AgentBuilder.LambdaInstrumentationStrategy.AlternativeMetaFactoryRedirection

java.lang.Object

java.lang.Enum<AgentBuilder.LambdaInstrumentationStrategy.AlternativeMetaFactoryRedirection>

net.bytebuddy.agent.builder.AgentBuilder.LambdaInstrumentationStrategy.AlternativeMetaFactoryRedirection

All Implemented Interfaces:

Serializable, Comparable<AgentBuilder.LambdaInstrumentationStrategy.AlternativeMetaFactoryRedirection>, AsmVisitorWrapper.ForDeclaredMethods.MethodVisitorWrapper

Enclosing class:

AgentBuilder.LambdaInstrumentationStrategy

protected static enum AgentBuilder.LambdaInstrumentationStrategy.AlternativeMetaFactoryRedirection
extends Enum<AgentBuilder.LambdaInstrumentationStrategy.AlternativeMetaFactoryRedirection>
implements AsmVisitorWrapper.ForDeclaredMethods.MethodVisitorWrapper

Implements the alternative lambda meta factory. The implementation represents the following code:

 public static CallSite altMetafactory(MethodHandles.Lookup caller,
     String invokedName,
     MethodType invokedType,
     Object... args) throws Exception {
   int flags = (Integer) args[3];
   int argIndex = 4;
    Class<?>[] markerInterface;
   if ((flags  & FLAG_MARKERS) != 0) {
     int markerCount = (Integer) args[argIndex++];
     markerInterface = new  Class<?>[markerCount];
     System.arraycopy(args, argIndex, markerInterface, 0, markerCount);
     argIndex += markerCount;
   } else {
     markerInterface = new  Class<?>[0];
   }
   MethodType[] additionalBridge;
   if ((flags  & FLAG_BRIDGES) != 0) {
     int bridgeCount = (Integer) args[argIndex++];
     additionalBridge = new MethodType[bridgeCount];
     System.arraycopy(args, argIndex, additionalBridge, 0, bridgeCount);
     // argIndex += bridgeCount;
   } else {
     additionalBridge = new MethodType[0];
   }
   Unsafe unsafe = Unsafe.getUnsafe();
    Class<?> lambdaClass = unsafe.defineAnonymousClass(caller.lookupClass(),
       (byte[]) ClassLoader.getSystemClassLoader().loadClass("net.bytebuddy.agent.builder.LambdaFactory").getDeclaredMethod("make",
           Object.class,
           String.class,
           Object.class,
           Object.class,
           Object.class,
           Object.class,
           boolean.class,
           List.class,
           List.class).invoke(null,
               caller,
               invokedName,
               invokedType,
               args[0],
               args[1],
               args[2],
               (flags  & FLAG_SERIALIZABLE) != 0,
               Arrays.asList(markerInterface),
               Arrays.asList(additionalBridge)),
       null);
   unsafe.ensureClassInitialized(lambdaClass);
   return invokedType.parameterCount() == 0
     ? new ConstantCallSite(MethodHandles.constant(invokedType.returnType(), lambdaClass.getDeclaredConstructors()[0].newInstance()))
     : new ConstantCallSite(MethodHandles.Lookup.IMPL_LOOKUP.findStatic(lambdaClass, "get$Lambda", invokedType));
 }
 

Enum Constant Summary

Enum Constants

Enum Constant and Description
INSTANCE The singleton instance.

Method Summary

Modifier and Type	Method and Description
static AgentBuilder.LambdaInstrumentationStrategy.AlternativeMetaFactoryRedirection	valueOf(String name) Returns the enum constant of this type with the specified name.
static AgentBuilder.LambdaInstrumentationStrategy.AlternativeMetaFactoryRedirection[]	values() Returns an array containing the constants of this enum type, in the order they are declared.
MethodVisitor	wrap(TypeDescription instrumentedType, MethodDescription instrumentedMethod, MethodVisitor methodVisitor, Implementation.Context implementationContext, TypePool typePool, int writerFlags, int readerFlags) Wraps a method visitor.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

INSTANCE

public static final AgentBuilder.LambdaInstrumentationStrategy.AlternativeMetaFactoryRedirection INSTANCE

The singleton instance.

Method Detail

values

public static AgentBuilder.LambdaInstrumentationStrategy.AlternativeMetaFactoryRedirection[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (AgentBuilder.LambdaInstrumentationStrategy.AlternativeMetaFactoryRedirection c : AgentBuilder.LambdaInstrumentationStrategy.AlternativeMetaFactoryRedirection.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static AgentBuilder.LambdaInstrumentationStrategy.AlternativeMetaFactoryRedirection valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

wrap

public MethodVisitor wrap(TypeDescription instrumentedType,
                          MethodDescription instrumentedMethod,
                          MethodVisitor methodVisitor,
                          Implementation.Context implementationContext,
                          TypePool typePool,
                          int writerFlags,
                          int readerFlags)

Wraps a method visitor.

Specified by:

wrap in interface AsmVisitorWrapper.ForDeclaredMethods.MethodVisitorWrapper

Parameters:

instrumentedType - The instrumented type.

instrumentedMethod - The method that is currently being defined.

methodVisitor - The original field visitor that defines the given method.

implementationContext - The implementation context to use.

typePool - The type pool to use.

writerFlags - The ASM ClassWriter reader flags to consider.

readerFlags - The ASM ClassReader reader flags to consider.

Returns:

The wrapped method visitor.