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/*
* Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://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.
*/
package com.google.zxing.client.j2se;
import com.beust.jcommander.JCommander;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
/**
* This simple command line utility decodes files, directories of files, or URIs which are passed
* as arguments. By default it uses the normal decoding algorithms, but you can pass --try_harder
* to request that hint. The raw text of each barcode is printed, and when running against
* directories, summary statistics are also displayed.
*
* @author dswitkin@google.com (Daniel Switkin)
* @author Sean Owen
*/
public final class CommandLineRunner {
private CommandLineRunner() {
}
public static void main(String[] args) throws Exception {
DecoderConfig config = new DecoderConfig();
JCommander jCommander = new JCommander(config);
jCommander.parse(args);
jCommander.setProgramName(CommandLineRunner.class.getSimpleName());
if (config.help) {
jCommander.usage();
return;
}
List<URI> inputs = new ArrayList<>(config.inputPaths.size());
for (String inputPath : config.inputPaths) {
URI uri;
try {
uri = new URI(inputPath);
} catch (URISyntaxException use) {
// Assume it must be a file
if (!Files.exists(Paths.get(inputPath))) {
throw use;
}
uri = new URI("file", inputPath, null);
}
inputs.add(uri);
}
do {
inputs = retainValid(expand(inputs), config.recursive);
} while (config.recursive && isExpandable(inputs));
int numInputs = inputs.size();
if (numInputs == 0) {
jCommander.usage();
return;
}
Queue<URI> syncInputs = new ConcurrentLinkedQueue<>(inputs);
int numThreads = Math.min(numInputs, Runtime.getRuntime().availableProcessors());
int successful = 0;
if (numThreads > 1) {
ExecutorService executor = Executors.newFixedThreadPool(numThreads);
Collection<Future<Integer>> futures = new ArrayList<>(numThreads);
for (int x = 0; x < numThreads; x++) {
futures.add(executor.submit(new DecodeWorker(config, syncInputs)));
}
executor.shutdown();
for (Future<Integer> future : futures) {
successful += future.get();
}
} else {
successful += new DecodeWorker(config, syncInputs).call();
}
if (!config.brief && numInputs > 1) {
System.out.println("\nDecoded " + successful + " files out of " + numInputs +
" successfully (" + (successful * 100 / numInputs) + "%)\n");
}
}
private static List<URI> expand(Iterable<URI> inputs) throws IOException {
List<URI> expanded = new ArrayList<>();
for (URI input : inputs) {
if (isFileOrDir(input)) {
Path inputPath = Paths.get(input);
if (Files.isDirectory(inputPath)) {
try (DirectoryStream<Path> childPaths = Files.newDirectoryStream(inputPath)) {
for (Path childPath : childPaths) {
expanded.add(childPath.toUri());
}
}
} else {
expanded.add(input);
}
} else {
expanded.add(input);
}
}
for (int i = 0; i < expanded.size(); i++) {
URI input = expanded.get(i);
if (input.getScheme() == null) {
expanded.set(i, Paths.get(input.getRawPath()).toUri());
}
}
return expanded;
}
private static List<URI> retainValid(Iterable<URI> inputs, boolean recursive) {
List<URI> retained = new ArrayList<>();
for (URI input : inputs) {
boolean retain;
if (isFileOrDir(input)) {
Path inputPath = Paths.get(input);
retain =
!inputPath.getFileName().toString().startsWith(".") &&
(recursive || !Files.isDirectory(inputPath));
} else {
retain = true;
}
if (retain) {
retained.add(input);
}
}
return retained;
}
private static boolean isExpandable(Iterable<URI> inputs) {
for (URI input : inputs) {
if (isFileOrDir(input) && Files.isDirectory(Paths.get(input))) {
return true;
}
}
return false;
}
private static boolean isFileOrDir(URI uri) {
return "file".equals(uri.getScheme());
}
}
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