com.diozero.util.UsbInfo Maven / Gradle / Ivy
package com.diozero.util;
/*-
* #%L
* Organisation: diozero
* Project: diozero - Core
* Filename: UsbInfo.java
*
* This file is part of the diozero project. More information about this project
* can be found at https://www.diozero.com/.
* %%
* Copyright (C) 2016 - 2021 diozero
* %%
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Iterator;
import java.util.Optional;
import org.tinylog.Logger;
public class UsbInfo {
private static final String USB_ID_DATABASE_PROP = "diozero.usb.ids";
private static final String DEFAULT_USB_ID_DATABASE = "/var/lib/usbutils/usb.ids";
private static final String USB_ID_DATABASE;
static {
USB_ID_DATABASE = PropertyUtil.getProperty(USB_ID_DATABASE_PROP, DEFAULT_USB_ID_DATABASE);
}
public static Optional resolve(String vendorId, String productId) {
String vendor_name = null;
String product_name = null;
try {
Iterator it = Files.lines(Paths.get(USB_ID_DATABASE))
.filter(line -> !line.startsWith("#")).filter(line -> !line.trim().isEmpty()).iterator();
while (it.hasNext()) {
String line = it.next();
if (line.startsWith("C ")) {
break;
}
if (line.startsWith(vendorId)) {
vendor_name = line.substring(vendorId.length()).trim();
// Now search for the product name
while (it.hasNext()) {
line = it.next();
if (!line.startsWith("\t")) {
break;
}
if (line.trim().startsWith(productId)) {
product_name = line.trim().substring(productId.length()).trim();
break;
}
}
break;
}
}
} catch (IOException e) {
Logger.error(e);
}
if (vendor_name == null) {
return Optional.empty();
}
return Optional.of(new String[] { vendor_name, product_name });
}
}