--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/sample/nio/file/Copy.java Sun Feb 15 12:25:54 2009 +0000
@@ -0,0 +1,217 @@
+/*
+ * Copyright 2008-2009 Sun Microsystems, Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of Sun Microsystems nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+import java.nio.file.*;
+import static java.nio.file.StandardCopyOption.*;
+import java.nio.file.attribute.*;
+import static java.nio.file.FileVisitResult.*;
+import java.io.IOException;
+import java.util.*;
+
+/**
+ * Sample code that copies files in a similar manner to the cp(1) program.
+ */
+
+public class Copy {
+
+ /**
+ * Returns {@code true} if okay to overwrite a file ("cp -i")
+ */
+ static boolean okayToOverwrite(FileRef file) {
+ String answer = System.console().readLine("overwrite %s (yes/no)? ", file);
+ return (answer.equalsIgnoreCase("y") || answer.equalsIgnoreCase("yes"));
+ }
+
+ /**
+ * Copy source file to target location. If {@code prompt} is true then
+ * prompted user to overwrite target if it exists. The {@code preserve}
+ * parameter determines if file attributes should be copied/preserved.
+ */
+ static void copyFile(Path source, Path target, boolean prompt, boolean preserve) {
+ CopyOption[] options = (preserve) ?
+ new CopyOption[] { COPY_ATTRIBUTES, REPLACE_EXISTING } :
+ new CopyOption[] { REPLACE_EXISTING };
+ if (!prompt || target.notExists() || okayToOverwrite(target)) {
+ try {
+ source.copyTo(target, options);
+ } catch (IOException x) {
+ System.err.format("Unable to create: %s: %s%n", target, x);
+ }
+ }
+ }
+
+ /**
+ * A {@code FileVisitor} that copies a file-tree ("cp -r")
+ */
+ static class TreeCopier implements FileVisitor<Path> {
+ private final Path source;
+ private final Path target;
+ private final boolean prompt;
+ private final boolean preserve;
+
+ TreeCopier(Path source, Path target, boolean prompt, boolean preserve) {
+ this.source = source;
+ this.target = target;
+ this.prompt = prompt;
+ this.preserve = preserve;
+ }
+
+ @Override
+ public FileVisitResult preVisitDirectory(Path dir) {
+ // before visiting entries in a directory we copy the directory
+ // (okay if directory already exists).
+ CopyOption[] options = (preserve) ?
+ new CopyOption[] { COPY_ATTRIBUTES } : new CopyOption[0];
+
+ Path newdir = target.resolve(source.relativize(dir));
+ try {
+ dir.copyTo(newdir, options);
+ } catch (FileAlreadyExistsException x) {
+ // ignore
+ } catch (IOException x) {
+ System.err.format("Unable to create: %s: %s%n", newdir, x);
+ return SKIP_SUBTREE;
+ }
+ return CONTINUE;
+ }
+
+ @Override
+ public FileVisitResult preVisitDirectoryFailed(Path dir, IOException exc) {
+ System.err.format("Unable to copy: %s: %s%n", dir, exc);
+ return CONTINUE;
+ }
+
+ @Override
+ public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {
+ if (attrs.isDirectory()) {
+ System.err.println("cycle detected: " + file);
+ } else {
+ copyFile(file, target.resolve(source.relativize(file)),
+ prompt, preserve);
+ }
+ return CONTINUE;
+ }
+
+ @Override
+ public FileVisitResult postVisitDirectory(Path dir, IOException exc) {
+ // fix up modification time of directory when done
+ if (exc == null && preserve) {
+ try {
+ BasicFileAttributes attrs = Attributes.readBasicFileAttributes(dir);
+ Path newdir = target.resolve(source.relativize(dir));
+ Attributes.setLastModifiedTime(newdir,
+ attrs.lastModifiedTime(), attrs.resolution());
+ } catch (IOException x) {
+ // ignore
+ }
+ }
+ return CONTINUE;
+ }
+
+ @Override
+ public FileVisitResult visitFileFailed(Path file, IOException exc) {
+ System.err.format("Unable to copy: %s: %s%n", file, exc);
+ return CONTINUE;
+ }
+ }
+
+ static void usage() {
+ System.err.println("java Copy [-ip] source... target");
+ System.err.println("java Copy -r [-ip] source-dir... target");
+ System.exit(-1);
+ }
+
+ public static void main(String[] args) throws IOException {
+ boolean recursive = false;
+ boolean prompt = false;
+ boolean preserve = false;
+
+ // process options
+ int argi = 0;
+ while (argi < args.length) {
+ String arg = args[argi];
+ if (!arg.startsWith("-"))
+ break;
+ if (arg.length() < 2)
+ usage();
+ for (int i=1; i<arg.length(); i++) {
+ char c = arg.charAt(i);
+ switch (c) {
+ case 'r' : recursive = true; break;
+ case 'i' : prompt = true; break;
+ case 'p' : preserve = true; break;
+ default : usage();
+ }
+ }
+ argi++;
+ }
+
+ // remaining arguments are the source files(s) and the target location
+ int remaining = args.length - argi;
+ if (remaining < 2)
+ usage();
+ Path[] source = new Path[remaining-1];
+ int i=0;
+ while (remaining > 1) {
+ source[i++] = Paths.get(args[argi++]);
+ remaining--;
+ }
+ Path target = Paths.get(args[argi]);
+
+ // check if target is a directory
+ boolean isDir = false;
+ try {
+ isDir = Attributes.readBasicFileAttributes(target).isDirectory();
+ } catch (IOException x) {
+ }
+
+ // copy each source file/directory to target
+ for (i=0; i<source.length; i++) {
+ Path dest = (isDir) ? target.resolve(source[i].getName()) : target;
+
+ if (recursive) {
+ // follow links when copying files
+ EnumSet<FileVisitOption> opts = EnumSet.of(FileVisitOption.FOLLOW_LINKS);
+ TreeCopier tc = new TreeCopier(source[i], dest, prompt, preserve);
+ Files.walkFileTree(source[i], opts, -1, tc);
+ } else {
+ // not recursive so source must not be a directory
+ try {
+ if (Attributes.readBasicFileAttributes(source[i]).isDirectory()) {
+ System.err.format("%s: is a directory%n", source[i]);
+ continue;
+ }
+ } catch (IOException x) { }
+ copyFile(source[i], dest, prompt, preserve);
+ }
+ }
+ }
+}