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API for dealing with RO Bundles
There is a newer version: 0.15.1-incubating
package org.apache.taverna.robundle.utils;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */


import static java.lang.Integer.MAX_VALUE;
import static java.nio.file.FileVisitOption.FOLLOW_LINKS;
import static java.nio.file.FileVisitResult.CONTINUE;
import static java.nio.file.FileVisitResult.SKIP_SUBTREE;
import static java.nio.file.Files.copy;
import static java.nio.file.Files.getFileAttributeView;
import static java.nio.file.Files.isDirectory;
import static java.nio.file.Files.readAttributes;
import static java.nio.file.Files.walkFileTree;
import static java.nio.file.LinkOption.NOFOLLOW_LINKS;
import static java.nio.file.StandardCopyOption.COPY_ATTRIBUTES;
import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;
import static java.util.EnumSet.noneOf;
import static org.apache.taverna.robundle.utils.RecursiveCopyFileVisitor.RecursiveCopyOption.IGNORE_ERRORS;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.file.CopyOption;
import java.nio.file.FileAlreadyExistsException;
import java.nio.file.FileVisitOption;
import java.nio.file.FileVisitResult;
import java.nio.file.LinkOption;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributeView;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.Arrays;
import java.util.EnumSet;
import java.util.HashSet;
import java.util.Set;

public class RecursiveCopyFileVisitor extends SimpleFileVisitor {
	public enum RecursiveCopyOption implements java.nio.file.CopyOption {
		/**
		 * Ignore any errors, copy as much as possible. The default is to stop
		 * on the first IOException.
		 */
		IGNORE_ERRORS,
	}

	public static void copyRecursively(final Path source,
			final Path destination, final CopyOption... copyOptions)
			throws IOException {
		final Set copyOptionsSet = new HashSet<>(
				Arrays.asList(copyOptions));

		if (!isDirectory(source))
			throw new FileNotFoundException("Not a directory: " + source);
		if (isDirectory(destination)
				&& !copyOptionsSet.contains(REPLACE_EXISTING))
			throw new FileAlreadyExistsException(destination.toString());
		Path destinationParent = destination.getParent();
		if (destinationParent != null && !isDirectory(destinationParent))
			throw new FileNotFoundException("Not a directory: "
					+ destinationParent);

		RecursiveCopyFileVisitor visitor = new RecursiveCopyFileVisitor(
				destination, copyOptionsSet, source);
		Set walkOptions = noneOf(FileVisitOption.class);
		if (!copyOptionsSet.contains(NOFOLLOW_LINKS))
			walkOptions = EnumSet.of(FOLLOW_LINKS);
		walkFileTree(source, walkOptions, MAX_VALUE, visitor);
	}

	private final CopyOption[] copyOptions;
	private final Set copyOptionsSet;
	private final Path destination;
	private boolean ignoreErrors;
	private final LinkOption[] linkOptions;
	private final Path source;

	RecursiveCopyFileVisitor(Path destination, Set copyOptionsSet,
			Path source) {
		this.destination = destination;
		this.source = source;
		this.copyOptionsSet = new HashSet<>(copyOptionsSet);

		HashSet