org.nd4j.common.io.ResourceUtils 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 java.io.File;
import java.io.FileNotFoundException;
import java.net.*;
public abstract class ResourceUtils {
public static final String CLASSPATH_URL_PREFIX = "classpath:";
public static final String FILE_URL_PREFIX = "file:";
public static final String URL_PROTOCOL_FILE = "file";
public static final String URL_PROTOCOL_JAR = "jar";
public static final String URL_PROTOCOL_ZIP = "zip";
public static final String URL_PROTOCOL_VFSZIP = "vfszip";
public static final String URL_PROTOCOL_VFS = "vfs";
public static final String URL_PROTOCOL_WSJAR = "wsjar";
public static final String URL_PROTOCOL_CODE_SOURCE = "code-source";
public static final String JAR_URL_SEPARATOR = "!/";
public ResourceUtils() {}
public static boolean isUrl(String resourceLocation) {
if (resourceLocation == null) {
return false;
} else if (resourceLocation.startsWith("classpath:")) {
return true;
} else {
try {
new URL(resourceLocation);
return true;
} catch (MalformedURLException var2) {
return false;
}
}
}
public static URL getURL(String resourceLocation) throws FileNotFoundException {
Assert.notNull(resourceLocation, "Resource location must not be null");
if (resourceLocation.startsWith("classpath:")) {
String ex = resourceLocation.substring("classpath:".length());
URL ex2 = ClassUtils.getDefaultClassLoader().getResource(ex);
if (ex2 == null) {
String description = "class path resource [" + ex + "]";
throw new FileNotFoundException(description + " cannot be resolved to URL because it does not exist");
} else {
return ex2;
}
} else {
try {
return new URL(resourceLocation);
} catch (MalformedURLException var5) {
try {
return (new File(resourceLocation)).toURI().toURL();
} catch (MalformedURLException var4) {
throw new FileNotFoundException("Resource location [" + resourceLocation
+ "] is neither a URL not a well-formed file path");
}
}
}
}
public static File getFile(String resourceLocation) throws FileNotFoundException {
Assert.notNull(resourceLocation, "Resource location must not be null");
if (resourceLocation.startsWith("classpath:")) {
String ex = resourceLocation.substring("classpath:".length());
String description = "class path resource [" + ex + "]";
URL url = ClassUtils.getDefaultClassLoader().getResource(ex);
if (url == null) {
throw new FileNotFoundException(description + " cannot be resolved to absolute file path "
+ "because it does not reside in the file system");
} else {
return getFile(url, description);
}
} else {
try {
return getFile(new URL(resourceLocation));
} catch (MalformedURLException var4) {
return new File(resourceLocation);
}
}
}
public static File getFile(URL resourceUrl) throws FileNotFoundException {
return getFile(resourceUrl, "URL");
}
public static File getFile(URL resourceUrl, String description) throws FileNotFoundException {
Assert.notNull(resourceUrl, "Resource URL must not be null");
if (!"file".equals(resourceUrl.getProtocol())) {
throw new FileNotFoundException(description + " cannot be resolved to absolute file path "
+ "because it does not reside in the file system: " + resourceUrl);
} else {
try {
return new File(toURI(resourceUrl).getSchemeSpecificPart());
} catch (URISyntaxException var3) {
return new File(resourceUrl.getFile());
}
}
}
public static File getFile(URI resourceUri) throws FileNotFoundException {
return getFile(resourceUri, "URI");
}
public static File getFile(URI resourceUri, String description) throws FileNotFoundException {
Assert.notNull(resourceUri, "Resource URI must not be null");
if (!"file".equals(resourceUri.getScheme())) {
throw new FileNotFoundException(description + " cannot be resolved to absolute file path "
+ "because it does not reside in the file system: " + resourceUri);
} else {
return new File(resourceUri.getSchemeSpecificPart());
}
}
public static boolean isFileURL(URL url) {
String protocol = url.getProtocol();
return "file".equals(protocol) || protocol.startsWith("vfs");
}
public static boolean isJarURL(URL url) {
String protocol = url.getProtocol();
return "jar".equals(protocol) || "zip".equals(protocol) || "wsjar".equals(protocol)
|| "code-source".equals(protocol) && url.getPath().contains("!/");
}
public static URL extractJarFileURL(URL jarUrl) throws MalformedURLException {
String urlFile = jarUrl.getFile();
int separatorIndex = urlFile.indexOf("!/");
if (separatorIndex != -1) {
String jarFile = urlFile.substring(0, separatorIndex);
try {
return new URL(jarFile);
} catch (MalformedURLException var5) {
if (!jarFile.startsWith("/")) {
jarFile = "/" + jarFile;
}
return new URL("file:" + jarFile);
}
} else {
return jarUrl;
}
}
public static URI toURI(URL url) throws URISyntaxException {
return toURI(url.toString());
}
public static URI toURI(String location) throws URISyntaxException {
return new URI(StringUtils.replace(location, " ", "%20"));
}
public static void useCachesIfNecessary(URLConnection con) {
con.setUseCaches(con.getClass().getSimpleName().startsWith("JNLP"));
}
}