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org.nd4j.common.io.VfsUtils Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2015-2018 Skymind, Inc.
*
* This program and the accompanying materials are made available under the
* terms of the Apache License, Version 2.0 which is available at
* https://www.apache.org/licenses/LICENSE-2.0.
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
* SPDX-License-Identifier: Apache-2.0
******************************************************************************/
package org.nd4j.common.io;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.URI;
import java.net.URL;
public abstract class VfsUtils {
private static final Logger logger = LoggerFactory.getLogger(VfsUtils.class);
private static final String VFS2_PKG = "org.jboss.virtual.";
private static final String VFS3_PKG = "org.jboss.vfs.";
private static final String VFS_NAME = "VFS";
private static VfsUtils.VFS_VER version;
private static Method VFS_METHOD_GET_ROOT_URL = null;
private static Method VFS_METHOD_GET_ROOT_URI = null;
private static Method VIRTUAL_FILE_METHOD_EXISTS = null;
private static Method VIRTUAL_FILE_METHOD_GET_INPUT_STREAM;
private static Method VIRTUAL_FILE_METHOD_GET_SIZE;
private static Method VIRTUAL_FILE_METHOD_GET_LAST_MODIFIED;
private static Method VIRTUAL_FILE_METHOD_TO_URL;
private static Method VIRTUAL_FILE_METHOD_TO_URI;
private static Method VIRTUAL_FILE_METHOD_GET_NAME;
private static Method VIRTUAL_FILE_METHOD_GET_PATH_NAME;
private static Method VIRTUAL_FILE_METHOD_GET_CHILD;
protected static Class VIRTUAL_FILE_VISITOR_INTERFACE;
protected static Method VIRTUAL_FILE_METHOD_VISIT;
private static Method VFS_UTILS_METHOD_IS_NESTED_FILE = null;
private static Method VFS_UTILS_METHOD_GET_COMPATIBLE_URI = null;
private static Field VISITOR_ATTRIBUTES_FIELD_RECURSE = null;
private static Method GET_PHYSICAL_FILE = null;
public VfsUtils() {}
protected static Object invokeVfsMethod(Method method, Object target, Object... args) throws IOException {
try {
return method.invoke(target, args);
} catch (InvocationTargetException var5) {
Throwable targetEx = var5.getTargetException();
if (targetEx instanceof IOException) {
throw (IOException) targetEx;
}
ReflectionUtils.handleInvocationTargetException(var5);
} catch (Exception var6) {
ReflectionUtils.handleReflectionException(var6);
}
throw new IllegalStateException("Invalid code path reached");
}
static boolean exists(Object vfsResource) {
try {
return ((Boolean) invokeVfsMethod(VIRTUAL_FILE_METHOD_EXISTS, vfsResource, new Object[0])).booleanValue();
} catch (IOException var2) {
return false;
}
}
static boolean isReadable(Object vfsResource) {
try {
return ((Long) invokeVfsMethod(VIRTUAL_FILE_METHOD_GET_SIZE, vfsResource, new Object[0])).longValue() > 0L;
} catch (IOException var2) {
return false;
}
}
static long getSize(Object vfsResource) throws IOException {
return ((Long) invokeVfsMethod(VIRTUAL_FILE_METHOD_GET_SIZE, vfsResource, new Object[0])).longValue();
}
static long getLastModified(Object vfsResource) throws IOException {
return ((Long) invokeVfsMethod(VIRTUAL_FILE_METHOD_GET_LAST_MODIFIED, vfsResource, new Object[0])).longValue();
}
static InputStream getInputStream(Object vfsResource) throws IOException {
return (InputStream) invokeVfsMethod(VIRTUAL_FILE_METHOD_GET_INPUT_STREAM, vfsResource, new Object[0]);
}
static URL getURL(Object vfsResource) throws IOException {
return (URL) invokeVfsMethod(VIRTUAL_FILE_METHOD_TO_URL, vfsResource, new Object[0]);
}
static URI getURI(Object vfsResource) throws IOException {
return (URI) invokeVfsMethod(VIRTUAL_FILE_METHOD_TO_URI, vfsResource, new Object[0]);
}
static String getName(Object vfsResource) {
try {
return (String) invokeVfsMethod(VIRTUAL_FILE_METHOD_GET_NAME, vfsResource, new Object[0]);
} catch (IOException var2) {
throw new IllegalStateException("Cannot get resource name", var2);
}
}
static Object getRelative(URL url) throws IOException {
return invokeVfsMethod(VFS_METHOD_GET_ROOT_URL, null, new Object[] {url});
}
static Object getChild(Object vfsResource, String path) throws IOException {
return invokeVfsMethod(VIRTUAL_FILE_METHOD_GET_CHILD, vfsResource, new Object[] {path});
}
static File getFile(Object vfsResource) throws IOException {
if (VfsUtils.VFS_VER.V2.equals(version)) {
if (((Boolean) invokeVfsMethod(VFS_UTILS_METHOD_IS_NESTED_FILE, null, new Object[] {vfsResource}))
.booleanValue()) {
throw new IOException("File resolution not supported for nested resource: " + vfsResource);
} else {
try {
return new File((URI) invokeVfsMethod(VFS_UTILS_METHOD_GET_COMPATIBLE_URI, null,
new Object[] {vfsResource}));
} catch (Exception var2) {
throw new IOException("Failed to obtain File reference for " + vfsResource, var2);
}
}
} else {
return (File) invokeVfsMethod(GET_PHYSICAL_FILE, vfsResource, new Object[0]);
}
}
static Object getRoot(URI url) throws IOException {
return invokeVfsMethod(VFS_METHOD_GET_ROOT_URI, null, new Object[] {url});
}
protected static Object getRoot(URL url) throws IOException {
return invokeVfsMethod(VFS_METHOD_GET_ROOT_URL, null, new Object[] {url});
}
protected static Object doGetVisitorAttribute() {
return ReflectionUtils.getField(VISITOR_ATTRIBUTES_FIELD_RECURSE, null);
}
protected static String doGetPath(Object resource) {
return (String) ReflectionUtils.invokeMethod(VIRTUAL_FILE_METHOD_GET_PATH_NAME, resource);
}
static {
ClassLoader loader = VfsUtils.class.getClassLoader();
String pkg;
Class vfsClass;
try {
vfsClass = loader.loadClass("org.jboss.vfs.VFS");
version = VfsUtils.VFS_VER.V3;
pkg = "org.jboss.vfs.";
if (logger.isDebugEnabled()) {
logger.debug("JBoss VFS packages for JBoss AS 6 found");
}
} catch (ClassNotFoundException var9) {
if (logger.isDebugEnabled()) {
logger.debug("JBoss VFS packages for JBoss AS 6 not found; falling back to JBoss AS 5 packages");
}
try {
vfsClass = loader.loadClass("org.jboss.virtual.VFS");
version = VfsUtils.VFS_VER.V2;
pkg = "org.jboss.virtual.";
if (logger.isDebugEnabled()) {
logger.debug("JBoss VFS packages for JBoss AS 5 found");
}
} catch (ClassNotFoundException var8) {
logger.error("JBoss VFS packages (for both JBoss AS 5 and 6) were not found - JBoss VFS support disabled");
throw new IllegalStateException("Cannot detect JBoss VFS packages", var8);
}
}
try {
String ex = VfsUtils.VFS_VER.V3.equals(version) ? "getChild" : "getRoot";
VFS_METHOD_GET_ROOT_URL = ReflectionUtils.findMethod(vfsClass, ex, new Class[] {URL.class});
VFS_METHOD_GET_ROOT_URI = ReflectionUtils.findMethod(vfsClass, ex, new Class[] {URI.class});
Class virtualFile = loader.loadClass(pkg + "VirtualFile");
VIRTUAL_FILE_METHOD_EXISTS = ReflectionUtils.findMethod(virtualFile, "exists");
VIRTUAL_FILE_METHOD_GET_INPUT_STREAM = ReflectionUtils.findMethod(virtualFile, "openStream");
VIRTUAL_FILE_METHOD_GET_SIZE = ReflectionUtils.findMethod(virtualFile, "getSize");
VIRTUAL_FILE_METHOD_GET_LAST_MODIFIED = ReflectionUtils.findMethod(virtualFile, "getLastModified");
VIRTUAL_FILE_METHOD_TO_URI = ReflectionUtils.findMethod(virtualFile, "toURI");
VIRTUAL_FILE_METHOD_TO_URL = ReflectionUtils.findMethod(virtualFile, "toURL");
VIRTUAL_FILE_METHOD_GET_NAME = ReflectionUtils.findMethod(virtualFile, "getName");
VIRTUAL_FILE_METHOD_GET_PATH_NAME = ReflectionUtils.findMethod(virtualFile, "getPathName");
GET_PHYSICAL_FILE = ReflectionUtils.findMethod(virtualFile, "getPhysicalFile");
ex = VfsUtils.VFS_VER.V3.equals(version) ? "getChild" : "findChild";
VIRTUAL_FILE_METHOD_GET_CHILD = ReflectionUtils.findMethod(virtualFile, ex, new Class[] {String.class});
Class utilsClass = loader.loadClass(pkg + "VFSUtils");
VFS_UTILS_METHOD_GET_COMPATIBLE_URI =
ReflectionUtils.findMethod(utilsClass, "getCompatibleURI", new Class[] {virtualFile});
VFS_UTILS_METHOD_IS_NESTED_FILE =
ReflectionUtils.findMethod(utilsClass, "isNestedFile", new Class[] {virtualFile});
VIRTUAL_FILE_VISITOR_INTERFACE = loader.loadClass(pkg + "VirtualFileVisitor");
VIRTUAL_FILE_METHOD_VISIT = ReflectionUtils.findMethod(virtualFile, "visit",
new Class[] {VIRTUAL_FILE_VISITOR_INTERFACE});
Class visitorAttributesClass = loader.loadClass(pkg + "VisitorAttributes");
VISITOR_ATTRIBUTES_FIELD_RECURSE = ReflectionUtils.findField(visitorAttributesClass, "RECURSE");
} catch (ClassNotFoundException var7) {
throw new IllegalStateException("Could not detect the JBoss VFS infrastructure", var7);
}
}
private static enum VFS_VER {
V2, V3;
private VFS_VER() {}
}
}
