Added last basic API-Classes

Added ForwardingFileSystem as delegator for method-calls between EasyDokanFileSystem-implementations and DokanFileSystem-API
Added EasyDokanFileSystemStub as stub for implementations of EasyDokanFileSystem (similiar to DokanFileSystemStub)
Added AbstractEasyDokanFileSystem as base class for implementations of EasyDokanFileSystem (similiar to AbstractDokanFileSystem)

This commit is part of my effort to fix dokan-java's issue dokan-dev#32

src/main/java/dev/dokan/dokan_java/wrappers/AbstractEasyDokanFileSystem.java

@@ -0,0 +1,69 @@
+package dev.dokan.dokan_java.wrappers;
+
+import dev.dokan.dokan_java.NativeName;
+import dev.dokan.dokan_java.FileSystemInformation;
+import dev.dokan.dokan_java.NotImplemented;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public abstract class AbstractEasyDokanFileSystem implements EasyDokanFileSystem {
+
+	private final Set<String> notImplementedMethods;
+	private final ForwardingFileSystem lowLevelFS;
+
+	public AbstractEasyDokanFileSystem(FileSystemInformation fileSystemInformation) {
+		this.notImplementedMethods = Arrays.stream(getClass().getMethods())
+			.filter(method -> method.getAnnotation(NotImplemented.class) != null)
+			.map((method) -> getNativeName(method))
+			.collect(Collectors.toSet());
+
+		this.lowLevelFS = new ForwardingFileSystem(fileSystemInformation, this.notImplementedMethods, this);
+	}
+
+	private String getNativeName(Method method) {
+		Method annotated = getAnnotatedMethod(NativeName.class, method);
+
+		if(annotated == null) {
+			return method.getName();
+		}
+		return annotated.getAnnotation(NativeName.class).value();
+	}
+
+	private Method getAnnotatedMethod(Class<? extends Annotation> annotation, Method method) {
+		return getAnnotatedMethod(annotation, method.getDeclaringClass(), method.getName(), method.getParameterTypes());
+	}
+
+	private Method getAnnotatedMethod(Class<? extends Annotation> annotation,
+		Class<?> inClass,
+		String methodName,
+		Class<?>... parameterTypes) {
+
+		Method result;
+		try {
+			result = inClass.getMethod(methodName, parameterTypes);
+		} catch(NoSuchMethodException e) {
+			return null;
+		}
+
+		if(result.isAnnotationPresent(annotation)) {
+			return result;
+		}
+
+		Class<?> superClass = inClass.getSuperclass();
+		if(superClass != null) {
+			result = getAnnotatedMethod(annotation, superClass, methodName, parameterTypes);
+		}
+
+		if(result != null) {
+			return result;
+		}
+
+		return Arrays.stream(inClass.getInterfaces())
+			.map((cInterface) -> getAnnotatedMethod(annotation, cInterface, methodName, parameterTypes))
+			.findFirst().orElse(null);
+	}
+}

src/main/java/dev/dokan/dokan_java/wrappers/EasyDokanFileSystemStub.java

@@ -0,0 +1,217 @@
+package dev.dokan.dokan_java.wrappers;
+
+import dev.dokan.dokan_java.FileSystemInformation;
+import dev.dokan.dokan_java.NotImplemented;
+import dev.dokan.dokan_java.constants.microsoft.CreateOption;
+import dev.dokan.dokan_java.constants.microsoft.CreationDisposition;
+import dev.dokan.dokan_java.constants.microsoft.FileAttribute;
+import dev.dokan.dokan_java.constants.microsoft.FileShareAccess;
+import dev.dokan.dokan_java.structure.EnumIntegerSet;
+import dev.dokan.dokan_java.structure.filesecurity.SelfRelativeSecurityDescriptor;
+
+import java.nio.file.Path;
+import java.nio.file.attribute.FileTime;
+import java.util.Collection;
+
+public class EasyDokanFileSystemStub extends AbstractEasyDokanFileSystem {
+
+	public EasyDokanFileSystemStub(FileSystemInformation fileSystemInformation) {
+		super(fileSystemInformation);
+	}
+
+	@NotImplemented
+	@Override
+	public void createHandle(Path absolutePath,
+		String relativePath,
+		EasyDokanIOSecurityContext securityContext,
+		DesiredAccessMask desiredAccess,
+		EnumIntegerSet<FileAttribute> fileAttributes,
+		EnumIntegerSet<FileShareAccess> shareAccess,
+		CreationDisposition creationDisposition,
+		EnumIntegerSet<CreateOption> createOptions,
+		DokanFileHandle dokanFileHandle) {
+
+	}
+
+	@NotImplemented
+	@Override
+	public void cleanup(Path absolutePath, String relativePath, DokanFileHandle dokanFileHandle) {
+
+	}
+
+	@NotImplemented
+	@Override
+	public void closeHandle(Path absolutePath, String relativePath, DokanFileHandle dokanFileHandle) {
+
+	}
+
+	@NotImplemented
+	@Override
+	public byte[] readFile(Path absolutePath,
+		String relativePath,
+		long offset,
+		int readLength,
+		DokanFileHandle dokanFileHandle) {
+		return new byte[0];
+	}
+
+	@NotImplemented
+	@Override
+	public int writeFile(Path absolutePath,
+		String relativePath,
+		byte[] buffer,
+		long offset,
+		DokanFileHandle dokanFileHandle) {
+		return 0;
+	}
+
+	@NotImplemented
+	@Override
+	public void flush(Path absolutePath, String relativePath, DokanFileHandle dokanFileHandle) {
+
+	}
+
+	@NotImplemented
+	@Override
+	public EasyFileInfo getFileInformation(Path absolutePath, String relativePath, DokanFileHandle dokanFileHandle) {
+		return null;
+	}
+
+	@NotImplemented
+	@Override
+	public Collection<FindFileInfo> findFiles(Path absolutePath, String relativePath, DokanFileHandle dokanFileHandle) {
+		return null;
+	}
+
+	@NotImplemented
+	@Override
+	public Collection<FindFileInfo> findFilesWithPattern(Path absolutePath,
+		String relativePath,
+		String pattern,
+		DokanFileHandle dokanFileHandle) {
+		return null;
+	}
+
+	@NotImplemented
+	@Override
+	public void setFileAttributes(Path absolutePath,
+		String relativePath,
+		EnumIntegerSet<FileAttribute> fileAttributes,
+		DokanFileHandle dokanFileHandle) {
+
+	}
+
+	@NotImplemented
+	@Override
+	public void setFileTime(Path absolutePath,
+		String relativePath,
+		FileTime creationTime,
+		FileTime lastAccessTime,
+		FileTime lastWriteTime,
+		DokanFileHandle dokanFileHandle) {
+
+	}
+
+	@NotImplemented
+	@Override
+	public void prepareDeleteFile(Path absolutePath, String relativePath, DokanFileHandle dokanFileHandle) {
+
+	}
+
+	@NotImplemented
+	@Override
+	public void prepareDeleteDirectory(Path absolutePath, String relativePath, DokanFileHandle dokanFileHandle) {
+
+	}
+
+	@NotImplemented
+	@Override
+	public void moveFile(Path sourceAbsolutePath,
+		String sourceRelativePath,
+		Path destinationAbsolutePath,
+		String destinationRelativePath,
+		boolean replaceIfExisting,
+		DokanFileHandle dokanFileHandle) {
+
+	}
+
+	@NotImplemented
+	@Override
+	public void setEndOfFile(Path absolutePath, String relativePath, long fileSize, DokanFileHandle dokanFileHandle) {
+
+	}
+
+	@NotImplemented
+	@Override
+	public void setAllocationSize(Path absolutePath,
+		String relativePath,
+		long allocationSize,
+		DokanFileHandle dokanFileHandle) {
+
+	}
+
+	@NotImplemented
+	@Override
+	public void lockFile(Path absolutePath,
+		String relativePath,
+		long lockOffset,
+		long lockLength,
+		DokanFileHandle dokanFileHandle) {
+
+	}
+
+	@NotImplemented
+	@Override
+	public void unlockFile(Path absolutePath,
+		String relativePath,
+		long lockOffset,
+		long lockLength,
+		DokanFileHandle dokanFileHandle) {
+
+	}
+
+	@NotImplemented
+	@Override
+	public DiskSpaceInfo getDiskSpaceInfo(DokanFileHandle dokanFileHandle) {
+		return null;
+	}
+
+	@NotImplemented
+	@Override
+	public VolumeInformation getVolumeInformation(DokanFileHandle dokanFileHandle) {
+		return null;
+	}
+
+	@NotImplemented
+	@Override
+	public void mounted(DokanFileHandle dokanFileHandle) {
+
+	}
+
+	@NotImplemented
+	@Override
+	public void unmounted(DokanFileHandle dokanFileHandle) {
+
+	}
+
+	@NotImplemented
+	@Override
+	public SelfRelativeSecurityDescriptor getFileSecurity(Path absolutePath,
+		String relativePath,
+		DesiredAccessMask requestedDescriptorInfo,
+		int availableLength,
+		DokanFileHandle dokanFileHandle) {
+		return null;
+	}
+
+	@NotImplemented
+	@Override
+	public void setFileSecurity(Path absolutePath,
+		String relativePath,
+		DesiredAccessMask suppliedDescriptorInfo,
+		SelfRelativeSecurityDescriptor securityDescriptor,
+		int availableLength,
+		DokanFileHandle dokanFileHandle) {
+
+	}
+}