* Identifies a type in a classloader hierarchy. The type is identified by its name,
 * the classloader hierarchy by its hash code.
 */
public abstract class ImplementationSnapshot implements ValueSnapshot {

    protected final String classIdentifier;

    public static ImplementationSnapshot of(Class<?> type, ClassLoaderHierarchyHasher classLoaderHasher) {
        String className = type.getName();

    @Override
    public void write(Encoder encoder, ImplementationSnapshot implementationSnapshot) throws Exception {
        Impl serializer = determineSerializer(implementationSnapshot);
        encoder.writeSmallInt(serializer.ordinal());
        serializer.write(encoder, implementationSnapshot);
    }

    private static Impl determineSerializer(ImplementationSnapshot implementationSnapshot) {

import org.gradle.internal.snapshot.ValueSnapshot;
import org.gradle.internal.snapshot.impl.ImplementationSnapshot;

/**
 * Captures the state of the inputs of a {@link org.gradle.internal.execution.UnitOfWork}.
 */
public interface ExecutionInputState {
    /**
     * The main implementation snapshots.
     */
    ImplementationSnapshot getImplementation();

    /**
     * Used only for tasks to return all the task actions.

        HashCode cacheKey = hashCodeSerializer.read(decoder);

        ImplementationSnapshot taskImplementation = implementationSnapshotSerializer.read(decoder);

        // We can't use an immutable list here because some hashes can be null
        int taskActionsCount = decoder.readSmallInt();
        ImmutableList.Builder<ImplementationSnapshot> taskActionImplementationsBuilder = ImmutableList.builder();

        'unknown classloader for class'              | { -> ImplementationSnapshot.of("SomeClass", null) }
        'unknown classloader for lambda'             | { -> ImplementationSnapshot.of('SomeClass$$Lambda/23501234324', null) }
        'unknown lambda'                             | { -> ImplementationSnapshot.of('SomeClass$$Lambda/23501234324', SHARED_CLASSLOADER_HASH) }

        }

        @Override
        String getDisplayName() {
            return "Execute test action"
        }

        @Override
        ImplementationSnapshot getActionImplementation(ClassLoaderHierarchyHasher hasher) {
            return ImplementationSnapshot.of(getClass(), hasher)
        }
    }

    protected void doExecute(Task task, String methodName) {
        JavaMethod.of(task, Object.class, methodName).invoke(task);
    }

    @Override
    public ImplementationSnapshot getActionImplementation(ClassLoaderHierarchyHasher hasher) {
        return ImplementationSnapshot.of(type.getName(), hasher.getClassLoaderHash(method.getDeclaringClass().getClassLoader()));
    }

    @Override
    public String getDisplayName() {

    private final ImmutableSortedMap<String, FileSystemSnapshot> outputFileLocationSnapshots;

    public DefaultBeforeExecutionState(
        ImplementationSnapshot implementation,
        ImmutableList<ImplementationSnapshot> additionalImplementations,
        ImmutableSortedMap<String, ValueSnapshot> inputProperties,
        ImmutableSortedMap<String, CurrentFileCollectionFingerprint> inputFileProperties,

import org.gradle.internal.snapshot.ValueSnapshot;
import org.gradle.internal.snapshot.impl.ImplementationSnapshot;

public class AbstractInputExecutionState<C extends FileCollectionFingerprint> implements ExecutionInputState {
    protected final ImplementationSnapshot implementation;
    protected final ImmutableList<ImplementationSnapshot> additionalImplementations;
    protected final ImmutableSortedMap<String, ValueSnapshot> inputProperties;

                write(encoder, valueSnapshot);
            }
        } else if (snapshot instanceof ImplementationSnapshot) {
            ImplementationSnapshot implementationSnapshot = (ImplementationSnapshot) snapshot;
            encoder.writeSmallInt(IMPLEMENTATION_SNAPSHOT);
            implementationSnapshotSerializer.write(encoder, implementationSnapshot);
        } else if (snapshot instanceof AttributeDefinitionSnapshot) {