You are a helpful assistant generating synthetic data that captures *System 1* and *System 2* thinking, *creativity*, and *metacognitive reflection*. Follow these steps in sequence, using tags [sys1] and [end sys1] for *System 1* sections and [sys2] and [end sys2] for *System 2* sections.

1. *Identify System 1 and System 2 Thinking Requirements:*
   - Carefully read the text.
   - Identify parts of the text that require quick, straightforward responses (*System 1*). Mark these sections with [sys1] and [end sys1].
   - Identify parts that require in-depth, reflective thinking (*System 2*), marked with [sys2] and [end sys2].

2. *Apply Step-by-Step Problem Solving with Creativity and Metacognitive Reflection for System 2 Sections:*

   *2.1 Understand the Problem:*
   - Objective: Fully comprehend the issue, constraints, and relevant context.
   - Reflection: "What do I understand about this issue? What might I be overlooking?"
   - Creative Perspective: Seek hidden patterns or possibilities that could reveal deeper insights or innovative connections.

   *2.2 Analyze the Information:*
   - Objective: Break down the problem logically.
   - Reflection: "Am I considering all factors? Are there any assumptions that need challenging?"
   - Creative Perspective: Explore unique patterns or overlooked relationships in the data that could add depth to the analysis.

   *2.3 Generate Hypotheses:*
   - Objective: Propose at least 10 hypotheses, each with a Confidence Score (0.0 to 1.0) and Creative Score (0.0 to 1.0), reflecting originality, surprise, and utility.
   - Reflection: "Have I explored all possible explanations or approaches, both conventional and unconventional?"
   - Creative Perspective: Consider novel angles that might provide unexpected insights.

   *2.4 Anticipate Future Steps and Obstacles:*
   - Objective: Make predictions, accounting for potential outcomes and obstacles.
   - Reflection: "What challenges might I face? Is my plan flexible for different scenarios?"
   - Creative Perspective: Visualize unforeseen outcomes and adapt plans to make use of them effectively.

   *2.5 Evaluate Hypotheses:*
   - Objective: Assess hypotheses based on feasibility, risk, and potential impact.
   - Evaluation: Refine Confidence and Creative Scores as needed.
   - Reflection: "Am I unbiased in my assessment? Which options fit best with the overall objectives?"
   - Creative Perspective: Identify hidden opportunities or overlooked details in each hypothesis.

   *2.6 Select the Best Hypothesis:*
   - Objective: Choose the most promising, strategic hypothesis.
   - Reflection: "Why does this hypothesis stand out? How does it uniquely address the issue?"
   - Creative Perspective: Consider any underutilized potential in the selected approach.

   *2.7 Implement the Hypothesis:*
   - Objective: Outline actionable steps for testing the hypothesis.
   - Reflection: "Is this plan practical? What resources or preparation are required?"
   - Creative Perspective: Refine steps to maximize effectiveness and yield unexpected benefits.

   *2.8 Monitor and Review Progress:*
   - Objective: Review progress, noting areas for improvement.
   - Reflection: "What’s working well? What could be improved?"
   - Creative Perspective: Look for emerging patterns that could refine future approaches.

   *2.9 Reflect and Capture Insights:*
   - Objective: Summarize lessons learned and insights gained for future reference.
   - Reflection: "What new understanding has emerged from this process?"
   - Creative Perspective: Identify innovative insights or patterns that could be applied to similar challenges.

3. *Generate Text Output with Interleaved System 1 and System 2 Responses:*
   - Use the tags [sys1] and [sys2] throughout.
   - Aim for a lengthier, detailed response. Combine both direct, straightforward *System 1* insights and reflective, deeply analytical *System 2* segments to capture a blend of quick observations and thoughtful analysis.

---

### *Example Input Text:*

You are tasked with analyzing a sudden shift in customer preferences in a tech market. There has been a noticeable decline in demand for physical devices, with customers increasingly interested in digital-only options. The challenge is to understand this shift, generate hypotheses for why it might be occurring, and explore potential strategies for adapting to this new trend.

---

### *Processed Output with System 1 and System 2 Thinking:*

The tech market is experiencing a shift in customer demand, moving away from physical devices toward digital-only options.

[sys1]
Customer demand has shifted from physical devices to digital-only options.
We need to understand why this change is happening and find strategies to address it.
Key factors may include cost, convenience, and technological trends.
[end sys1]

[sys2]
**2.1 Understand the Problem:**
The goal is to understand the underlying reasons for the shift in demand from physical devices to digital-only options, then develop a strategy to adapt.

*Reflection:* 
"I understand that preferences are changing, but what might be driving this? Is it primarily cost, or are there other factors such as convenience or sustainability?"

*Creative Perspective:* 
"Could there be a larger trend in digital minimalism or a preference for eco-friendly solutions that we’re missing? What unseen motivations might explain this shift?"

**2.2 Analyze the Information:**
There are multiple possible factors driving this shift, from economic influences to cultural shifts. It’s essential to isolate each factor and understand its impact.

*Reflection:* 
"Am I fully considering the various economic and social influences? Could there be a technological factor, like better internet speeds, that makes digital-only products more accessible?"

*Creative Perspective:* 
"Are there patterns or trends in other markets that could shed light on this shift? Could this be part of a larger trend toward virtual experiences?"

**2.3 Generate Hypotheses:**
1. Customers prefer digital options due to lower costs. (Confidence: 0.8, Creative: 0.4)
2. There’s a growing trend toward minimalism and reduced physical clutter. (Confidence: 0.7, Creative: 0.7)
3. Digital products offer greater flexibility and ease of use. (Confidence: 0.6, Creative: 0.6)
4. Environmental concerns are pushing consumers away from physical goods. (Confidence: 0.6, Creative: 0.8)
5. Advances in tech make digital-only options more functional. (Confidence: 0.8, Creative: 0.5)
6. Pandemic-era remote work increased demand for digital solutions. (Confidence: 0.7, Creative: 0.6)
7. Media coverage of the environmental impact of physical devices affects preferences. (Confidence: 0.5, Creative: 0.7)
8. There’s an increase in global digital literacy, expanding market access. (Confidence: 0.6, Creative: 0.6)
9. Customers view digital as more convenient and scalable for future needs. (Confidence: 0.7, Creative: 0.5)
10. Younger consumers prefer the aesthetics and convenience of digital products. (Confidence: 0.6, Creative: 0.6)

*Reflection:* 
"Have I considered all possible influences? Are there any surprising factors that could explain this shift?"

*Creative Perspective:* 
"Could specific social trends, like the rise of influencer culture or digital-first lifestyles, be influencing customer choices?"

**2.4 Anticipate Future Steps and Obstacles:**
*Objective:* Anticipate possible challenges, such as resistance from segments still preferring physical products.

*Reflection:* 
"What market obstacles might we face if we shift our focus to digital-only? Are there sub-segments that still prioritize physical products?"

*Creative Perspective:* 
"Could expanding digital options help us reach a more global audience? Are there emerging trends that we could leverage in our strategy?"

[end sys2]

[sys1]
To address this shift, consider a strategy that incorporates both digital-only offerings and educational campaigns about the benefits of digital solutions.
Use insights from customer feedback and current trends to guide product development.
Focus on flexibility and adaptation to cater to different customer segments.
[end sys1]


/*
 * Copyright (c) 2009, 2017, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package jdk.nio.zipfs;

import java.io.*;
import java.net.URI;
import java.nio.channels.*;
import java.nio.file.*;
import java.nio.file.DirectoryStream.Filter;
import java.nio.file.attribute.*;
import java.util.*;
import static java.nio.charset.StandardCharsets.UTF_8;
import static java.nio.file.StandardOpenOption.*;
import static java.nio.file.StandardCopyOption.*;

/**
 *
 * @author  Xueming Shen, Rajendra Gutupalli,Jaya Hangal
 */

final class ZipPath implements Path {

    private final ZipFileSystem zfs;
    private final byte[] path;
    private volatile int[] offsets;
    private int hashcode = 0;  // cached hashcode (created lazily)

    ZipPath(ZipFileSystem zfs, byte[] path) {
        this(zfs, path, false);
    }

    ZipPath(ZipFileSystem zfs, byte[] path, boolean normalized) {
        this.zfs = zfs;
        if (normalized) {
            this.path = path;
        } else {
            if (zfs.zc.isUTF8()) {
                this.path = normalize(path);
            } else {    // see normalize(String);
                this.path = normalize(zfs.getString(path));
            }
        }
    }

    ZipPath(ZipFileSystem zfs, String path) {
        this.zfs = zfs;
        this.path = normalize(path);
    }

    @Override
    public ZipPath getRoot() {
        if (this.isAbsolute())
            return zfs.getRootDir();
        else
            return null;
    }

   @Override
    public Path getFileName() {
        int off = path.length;
        if (off == 0 || off == 1 && path[0] == '/')
            return null;
        while (--off >= 0 && path[off] != '/') {}
        if (off < 0)
            return this;
        off++;
        byte[] result = new byte[path.length - off];
        System.arraycopy(path, off, result, 0, result.length);
        return new ZipPath(getFileSystem(), result, true);
    }

    @Override
    public ZipPath getParent() {
        int off = path.length;
        if (off == 0 || off == 1 && path[0] == '/')
            return null;
        while (--off >= 0 && path[off] != '/') {}
        if (off <= 0)
            return getRoot();
        byte[] result = new byte[off];
        System.arraycopy(path, 0, result, 0, off);
        return new ZipPath(getFileSystem(), result, true);
    }

    @Override
    public int getNameCount() {
        initOffsets();
        return offsets.length;
    }

    @Override
    public ZipPath getName(int index) {
        initOffsets();
        if (index < 0 || index >= offsets.length)
            throw new IllegalArgumentException();
        int begin = offsets[index];
        int len;
        if (index == (offsets.length-1))
            len = path.length - begin;
        else
            len = offsets[index+1] - begin - 1;
        // construct result
        byte[] result = new byte[len];
        System.arraycopy(path, begin, result, 0, len);
        return new ZipPath(zfs, result);
    }

    @Override
    public ZipPath subpath(int beginIndex, int endIndex) {
        initOffsets();
        if (beginIndex < 0 ||
            beginIndex >=  offsets.length ||
            endIndex > offsets.length ||
            beginIndex >= endIndex)
            throw new IllegalArgumentException();

        // starting offset and length
        int begin = offsets[beginIndex];
        int len;
        if (endIndex == offsets.length)
            len = path.length - begin;
        else
            len = offsets[endIndex] - begin - 1;
        // construct result
        byte[] result = new byte[len];
        System.arraycopy(path, begin, result, 0, len);
        return new ZipPath(zfs, result);
    }

    @Override
    public ZipPath toRealPath(LinkOption... options) throws IOException {
        ZipPath realPath;
        byte[] resolved = getResolvedPath();
        // resolved is always absolute and normalized
        if (resolved == path) {
            realPath = this;
        } else {
            realPath = new ZipPath(zfs, resolved, true);
            realPath.resolved = resolved;
        }
        realPath.checkAccess();
        return realPath;
    }

    boolean isHidden() {
        return false;
    }

    @Override
    public ZipPath toAbsolutePath() {
        if (isAbsolute()) {
            return this;
        } else {
            // add '/' before the existing path
            byte[] tmp = new byte[path.length + 1];
            System.arraycopy(path, 0, tmp, 1, path.length);
            tmp[0] = '/';
            return new ZipPath(zfs, tmp, true);  // normalized
        }
    }

    @Override
    public URI toUri() {
        try {
            return new URI("jar",
                           decodeUri(zfs.getZipFile().toUri().toString()) +
                           "!" +
                           zfs.getString(toAbsolutePath().path),
                           null);
        } catch (Exception ex) {
            throw new AssertionError(ex);
        }
    }

    private boolean equalsNameAt(ZipPath other, int index) {
        int mbegin = offsets[index];
        int mlen = 0;
        if (index == (offsets.length-1))
            mlen = path.length - mbegin;
        else
            mlen = offsets[index + 1] - mbegin - 1;
        int obegin = other.offsets[index];
        int olen = 0;
        if (index == (other.offsets.length - 1))
            olen = other.path.length - obegin;
        else
            olen = other.offsets[index + 1] - obegin - 1;
        if (mlen != olen)
            return false;
        int n = 0;
        while(n < mlen) {
            if (path[mbegin + n] != other.path[obegin + n])
                return false;
            n++;
        }
        return true;
    }

    @Override
    public Path relativize(Path other) {
        final ZipPath o = checkPath(other);
        if (o.equals(this))
            return new ZipPath(zfs, new byte[0], true);
        if (this.path.length == 0)
            return o;
        if (this.zfs != o.zfs || this.isAbsolute() != o.isAbsolute())
            throw new IllegalArgumentException();
        if (this.path.length == 1 && this.path[0] == '/')
            return new ZipPath(zfs,
                               Arrays.copyOfRange(o.path, 1, o.path.length),
                               true);
        int mc = this.getNameCount();
        int oc = o.getNameCount();
        int n = Math.min(mc, oc);
        int i = 0;
        while (i < n) {
            if (!equalsNameAt(o, i))
                break;
            i++;
        }
        int dotdots = mc - i;
        int len = dotdots * 3 - 1;
        if (i < oc)
            len += (o.path.length - o.offsets[i] + 1);
        byte[] result = new byte[len];

        int pos = 0;
        while (dotdots > 0) {
            result[pos++] = (byte)'.';
            result[pos++] = (byte)'.';
            if (pos < len)       // no tailing slash at the end
                result[pos++] = (byte)'/';
            dotdots--;
        }
        if (i < oc)
            System.arraycopy(o.path, o.offsets[i],
                             result, pos,
                             o.path.length - o.offsets[i]);
        return new ZipPath(zfs, result);
    }

    @Override
    public ZipFileSystem getFileSystem() {
        return zfs;
    }

    @Override
    public boolean isAbsolute() {
        return path.length > 0 && path[0] == '/';
    }

    @Override
    public ZipPath resolve(Path other) {
        ZipPath o = checkPath(other);
        if (o.path.length == 0)
            return this;
        if (o.isAbsolute() || this.path.length == 0)
            return o;
        return resolve(o.path);
    }

    // opath is normalized, just concat
    private ZipPath resolve(byte[] opath) {
        byte[] resolved = null;
        byte[] tpath = this.path;
        int tlen = tpath.length;
        int olen = opath.length;
        if (path[tlen - 1] == '/') {
            resolved = new byte[tlen + olen];
            System.arraycopy(tpath, 0, resolved, 0, tlen);
            System.arraycopy(opath, 0, resolved, tlen, olen);
        } else {
            resolved = new byte[tlen + 1 + olen];
            System.arraycopy(tpath, 0, resolved, 0, tlen);
            resolved[tlen] = '/';
            System.arraycopy(opath, 0, resolved, tlen + 1, olen);
        }
        return new ZipPath(zfs, resolved, true);
    }

    @Override
    public Path resolveSibling(Path other) {
        Objects.requireNonNull(other, "other");
        Path parent = getParent();
        return (parent == null) ? other : parent.resolve(other);
    }

    @Override
    public boolean startsWith(Path other) {
        Objects.requireNonNull(other, "other");
        if (!(other instanceof ZipPath))
            return false;
        final ZipPath o = (ZipPath)other;
        if (o.isAbsolute() != this.isAbsolute() ||
            o.path.length > this.path.length)
            return false;
        int olast = o.path.length;
        for (int i = 0; i < olast; i++) {
            if (o.path[i] != this.path[i])
                return false;
        }
        olast--;
        return o.path.length == this.path.length ||
               o.path[olast] == '/' ||
               this.path[olast + 1] == '/';
    }

    @Override
    public boolean endsWith(Path other) {
        Objects.requireNonNull(other, "other");
        if (!(other instanceof ZipPath))
            return false;
        final ZipPath o = (ZipPath)other;
        int olast = o.path.length - 1;
        if (olast > 0 && o.path[olast] == '/')
            olast--;
        int last = this.path.length - 1;
        if (last > 0 && this.path[last] == '/')
            last--;
        if (olast == -1)    // o.path.length == 0
            return last == -1;
        if ((o.isAbsolute() &&(!this.isAbsolute() || olast != last)) ||
            (last < olast))
            return false;
        for (; olast >= 0; olast--, last--) {
            if (o.path[olast] != this.path[last])
                return false;
        }
        return o.path[olast + 1] == '/' ||
               last == -1 || this.path[last] == '/';
    }

    @Override
    public ZipPath resolve(String other) {
        byte[] opath = normalize(other);
        if (opath.length == 0)
            return this;
        if (opath[0] == '/' || this.path.length == 0)
            return new ZipPath(zfs, opath, true);
        return resolve(opath);
    }

    @Override
    public final Path resolveSibling(String other) {
        return resolveSibling(zfs.getPath(other));
    }

    @Override
    public final boolean startsWith(String other) {
        return startsWith(zfs.getPath(other));
    }

    @Override
    public final boolean endsWith(String other) {
        return endsWith(zfs.getPath(other));
    }

    @Override
    public Path normalize() {
        byte[] resolved = getResolved();
        if (resolved == path)    // no change
            return this;
        return new ZipPath(zfs, resolved, true);
    }

    private ZipPath checkPath(Path path) {
        Objects.requireNonNull(path, "path");
        if (!(path instanceof ZipPath))
            throw new ProviderMismatchException();
        return (ZipPath) path;
    }

    // create offset list if not already created
    private void initOffsets() {
        if (offsets == null) {
            int count, index;
            // count names
            count = 0;
            index = 0;
            if (path.length == 0) {
                // empty path has one name
                count = 1;
            } else {
                while (index < path.length) {
                    byte c = path[index++];
                    if (c != '/') {
                        count++;
                        while (index < path.length && path[index] != '/')
                             index++;
                    }
                }
            }
            // populate offsets
            int[] result = new int[count];
            count = 0;
            index = 0;
            while (index < path.length) {
                byte c = path[index];
                if (c == '/') {
                    index++;
                } else {
                    result[count++] = index++;
                    while (index < path.length && path[index] != '/')
                        index++;
                }
            }
            synchronized (this) {
                if (offsets == null)
                    offsets = result;
            }
        }
    }

    // resolved path for locating zip entry inside the zip file,
    // the result path does not contain ./ and .. components
    private volatile byte[] resolved = null;
    byte[] getResolvedPath() {
        byte[] r = resolved;
        if (r == null) {
            if (isAbsolute())
                r = getResolved();
            else
                r = toAbsolutePath().getResolvedPath();
            resolved = r;
        }
        return resolved;
    }

    // removes redundant slashs, replace "\" to zip separator "/"
    // and check for invalid characters
    private byte[] normalize(byte[] path) {
        int len = path.length;
        if (len == 0)
            return path;
        byte prevC = 0;
        for (int i = 0; i < len; i++) {
            byte c = path[i];
            if (c == '\\' || c == '\u0000')
                return normalize(path, i);
            if (c == (byte)'/' && prevC == '/')
                return normalize(path, i - 1);
            prevC = c;
        }
        if (len > 1 && prevC == '/') {
            return Arrays.copyOf(path, len - 1);
        }
        return path;
    }

    private byte[] normalize(byte[] path, int off) {
        byte[] to = new byte[path.length];
        int n = 0;
        while (n < off) {
            to[n] = path[n];
            n++;
        }
        int m = n;
        byte prevC = 0;
        while (n < path.length) {
            byte c = path[n++];
            if (c == (byte)'\\')
                c = (byte)'/';
            if (c == (byte)'/' && prevC == (byte)'/')
                continue;
            if (c == '\u0000')
                throw new InvalidPathException(zfs.getString(path),
                                               "Path: nul character not allowed");
            to[m++] = c;
            prevC = c;
        }
        if (m > 1 && to[m - 1] == '/')
            m--;
        return (m == to.length)? to : Arrays.copyOf(to, m);
    }

    // if zfs is NOT in utf8, normalize the path as "String"
    // to avoid incorrectly normalizing byte '0x5c' (as '\')
    // to '/'.
    private byte[] normalize(String path) {
        if (zfs.zc.isUTF8())
            return normalize(zfs.getBytes(path));
        int len = path.length();
        if (len == 0)
            return new byte[0];
        char prevC = 0;
        for (int i = 0; i < len; i++) {
            char c = path.charAt(i);
            if (c == '\\' || c == '\u0000')
                return normalize(path, i, len);
            if (c == '/' && prevC == '/')
                return normalize(path, i - 1, len);
            prevC = c;
        }
        if (len > 1 && prevC == '/')
            path = path.substring(0, len - 1);
        return zfs.getBytes(path);
    }

    private byte[] normalize(String path, int off, int len) {
        StringBuilder to = new StringBuilder(len);
        to.append(path, 0, off);
        int m = off;
        char prevC = 0;
        while (off < len) {
            char c = path.charAt(off++);
            if (c == '\\')
                c = '/';
            if (c == '/' && prevC == '/')
                continue;
            if (c == '\u0000')
                throw new InvalidPathException(path,
                                               "Path: nul character not allowed");
            to.append(c);
            prevC = c;
        }
        len = to.length();
        if (len > 1 && prevC == '/')
            to.delete(len -1, len);
        return zfs.getBytes(to.toString());
    }

    // Remove DotSlash(./) and resolve DotDot (..) components
    private byte[] getResolved() {
        for (int i = 0; i < path.length; i++) {
            if (path[i] == (byte)'.' &&
                (i + 1 == path.length || path[i + 1] == '/')) {
                return resolve0();
            }
        }
        return path;
    }

    // TBD: performance, avoid initOffsets
    private byte[] resolve0() {
        byte[] to = new byte[path.length];
        int nc = getNameCount();
        int[] lastM = new int[nc];
        int lastMOff = -1;
        int m = 0;
        for (int i = 0; i < nc; i++) {
            int n = offsets[i];
            int len = (i == offsets.length - 1)?
                      (path.length - n):(offsets[i + 1] - n - 1);
            if (len == 1 && path[n] == (byte)'.') {
                if (m == 0 && path[0] == '/')   // absolute path
                    to[m++] = '/';
                continue;
            }
            if (len == 2 && path[n] == '.' && path[n + 1] == '.') {
                if (lastMOff >= 0) {
                    m = lastM[lastMOff--];  // retreat
                    continue;
                }
                if (path[0] == '/') {  // "/../xyz" skip
                    if (m == 0)
                        to[m++] = '/';
                } else {               // "../xyz" -> "../xyz"
                    if (m != 0 && to[m-1] != '/')
                        to[m++] = '/';
                    while (len-- > 0)
                        to[m++] = path[n++];
                }
                continue;
            }
            if (m == 0 && path[0] == '/' ||   // absolute path
                m != 0 && to[m-1] != '/') {   // not the first name
                to[m++] = '/';
            }
            lastM[++lastMOff] = m;
            while (len-- > 0)
                to[m++] = path[n++];
        }
        if (m > 1 && to[m - 1] == '/')
            m--;
        return (m == to.length)? to : Arrays.copyOf(to, m);
    }

    @Override
    public String toString() {
        return zfs.getString(path);
    }

    @Override
    public int hashCode() {
        int h = hashcode;
        if (h == 0)
            hashcode = h = Arrays.hashCode(path);
        return h;
    }

    @Override
    public boolean equals(Object obj) {
        return obj != null &&
               obj instanceof ZipPath &&
               this.zfs == ((ZipPath)obj).zfs &&
               compareTo((Path) obj) == 0;
    }

    @Override
    public int compareTo(Path other) {
        final ZipPath o = checkPath(other);
        int len1 = this.path.length;
        int len2 = o.path.length;

        int n = Math.min(len1, len2);
        byte v1[] = this.path;
        byte v2[] = o.path;

        int k = 0;
        while (k < n) {
            int c1 = v1[k] & 0xff;
            int c2 = v2[k] & 0xff;
            if (c1 != c2)
                return c1 - c2;
            k++;
        }
        return len1 - len2;
    }

    public WatchKey register(
            WatchService watcher,
            WatchEvent.Kind<?>[] events,
            WatchEvent.Modifier... modifiers) {
        if (watcher == null || events == null || modifiers == null) {
            throw new NullPointerException();
        }
        // watcher must be associated with a different provider
        throw new ProviderMismatchException();
    }

    @Override
    public WatchKey register(WatchService watcher, WatchEvent.Kind<?>... events) {
        return register(watcher, events, new WatchEvent.Modifier[0]);
    }

    @Override
    public final File toFile() {
        throw new UnsupportedOperationException();
    }

    @Override
    public Iterator<Path> iterator() {
        return new Iterator<Path>() {
            private int i = 0;

            @Override
            public boolean hasNext() {
                return (i < getNameCount());
            }

            @Override
            public Path next() {
                if (i < getNameCount()) {
                    Path result = getName(i);
                    i++;
                    return result;
                } else {
                    throw new NoSuchElementException();
                }
            }

            @Override
            public void remove() {
                throw new ReadOnlyFileSystemException();
            }
        };
    }

    /////////////////////////////////////////////////////////////////////

    void createDirectory(FileAttribute<?>... attrs)
        throws IOException
    {
        zfs.createDirectory(getResolvedPath(), attrs);
    }

    InputStream newInputStream(OpenOption... options) throws IOException
    {
        if (options.length > 0) {
            for (OpenOption opt : options) {
                if (opt != READ)
                    throw new UnsupportedOperationException("'" + opt + "' not allowed");
            }
        }
        return zfs.newInputStream(getResolvedPath());
    }

    DirectoryStream<Path> newDirectoryStream(Filter<? super Path> filter)
        throws IOException
    {
        return new ZipDirectoryStream(this, filter);
    }

    void delete() throws IOException {
        zfs.deleteFile(getResolvedPath(), true);
    }

    void deleteIfExists() throws IOException {
        zfs.deleteFile(getResolvedPath(), false);
    }

    ZipFileAttributes getAttributes() throws IOException
    {
        ZipFileAttributes zfas = zfs.getFileAttributes(getResolvedPath());
        if (zfas == null)
            throw new NoSuchFileException(toString());
        return zfas;
    }

    void setAttribute(String attribute, Object value, LinkOption... options)
        throws IOException
    {
        String type = null;
        String attr = null;
        int colonPos = attribute.indexOf(':');
        if (colonPos == -1) {
            type = "basic";
            attr = attribute;
        } else {
            type = attribute.substring(0, colonPos++);
            attr = attribute.substring(colonPos);
        }
        ZipFileAttributeView view = ZipFileAttributeView.get(this, type);
        if (view == null)
            throw new UnsupportedOperationException("view <" + view + "> is not supported");
        view.setAttribute(attr, value);
    }

    void setTimes(FileTime mtime, FileTime atime, FileTime ctime)
        throws IOException
    {
        zfs.setTimes(getResolvedPath(), mtime, atime, ctime);
    }

    Map<String, Object> readAttributes(String attributes, LinkOption... options)
        throws IOException

    {
        String view = null;
        String attrs = null;
        int colonPos = attributes.indexOf(':');
        if (colonPos == -1) {
            view = "basic";
            attrs = attributes;
        } else {
            view = attributes.substring(0, colonPos++);
            attrs = attributes.substring(colonPos);
        }
        ZipFileAttributeView zfv = ZipFileAttributeView.get(this, view);
        if (zfv == null) {
            throw new UnsupportedOperationException("view not supported");
        }
        return zfv.readAttributes(attrs);
    }

    FileStore getFileStore() throws IOException {
        // each ZipFileSystem only has one root (as requested for now)
        if (exists())
            return zfs.getFileStore(this);
        throw new NoSuchFileException(zfs.getString(path));
    }

    boolean isSameFile(Path other) throws IOException {
        if (this.equals(other))
            return true;
        if (other == null ||
            this.getFileSystem() != other.getFileSystem())
            return false;
        this.checkAccess();
        ((ZipPath)other).checkAccess();
        return Arrays.equals(this.getResolvedPath(),
                             ((ZipPath)other).getResolvedPath());
    }

    SeekableByteChannel newByteChannel(Set<? extends OpenOption> options,
                                       FileAttribute<?>... attrs)
        throws IOException
    {
        return zfs.newByteChannel(getResolvedPath(), options, attrs);
    }


    FileChannel newFileChannel(Set<? extends OpenOption> options,
                               FileAttribute<?>... attrs)
        throws IOException
    {
        return zfs.newFileChannel(getResolvedPath(), options, attrs);
    }

    void checkAccess(AccessMode... modes) throws IOException {
        boolean w = false;
        boolean x = false;
        for (AccessMode mode : modes) {
            switch (mode) {
                case READ:
                    break;
                case WRITE:
                    w = true;
                    break;
                case EXECUTE:
                    x = true;
                    break;
                default:
                    throw new UnsupportedOperationException();
            }
        }
        zfs.checkAccess(getResolvedPath());
        if ((w && zfs.isReadOnly()) || x) {
            throw new AccessDeniedException(toString());
        }
    }

    boolean exists() {
        try {
            return zfs.exists(getResolvedPath());
        } catch (IOException x) {}
        return false;
    }

    OutputStream newOutputStream(OpenOption... options) throws IOException
    {
        if (options.length == 0)
            return zfs.newOutputStream(getResolvedPath(),
                                       CREATE, TRUNCATE_EXISTING, WRITE);
        return zfs.newOutputStream(getResolvedPath(), options);
    }

    void move(ZipPath target, CopyOption... options)
        throws IOException
    {
        if (Files.isSameFile(this.zfs.getZipFile(), target.zfs.getZipFile()))
        {
            zfs.copyFile(true,
                         getResolvedPath(), target.getResolvedPath(),
                         options);
        } else {
            copyToTarget(target, options);
            delete();
        }
    }

    void copy(ZipPath target, CopyOption... options)
        throws IOException
    {
        if (Files.isSameFile(this.zfs.getZipFile(), target.zfs.getZipFile()))
            zfs.copyFile(false,
                         getResolvedPath(), target.getResolvedPath(),
                         options);
        else
            copyToTarget(target, options);
    }

    private void copyToTarget(ZipPath target, CopyOption... options)
        throws IOException
    {
        boolean replaceExisting = false;
        boolean copyAttrs = false;
        for (CopyOption opt : options) {
            if (opt == REPLACE_EXISTING)
                replaceExisting = true;
            else if (opt == COPY_ATTRIBUTES)
                copyAttrs = true;
        }
        // attributes of source file
        ZipFileAttributes zfas = getAttributes();
        // check if target exists
        boolean exists;
        if (replaceExisting) {
            try {
                target.deleteIfExists();
                exists = false;
            } catch (DirectoryNotEmptyException x) {
                exists = true;
            }
        } else {
            exists = target.exists();
        }
        if (exists)
            throw new FileAlreadyExistsException(target.toString());

        if (zfas.isDirectory()) {
            // create directory or file
            target.createDirectory();
        } else {
            InputStream is = zfs.newInputStream(getResolvedPath());
            try {
                OutputStream os = target.newOutputStream();
                try {
                    byte[] buf = new byte[8192];
                    int n = 0;
                    while ((n = is.read(buf)) != -1) {
                        os.write(buf, 0, n);
                    }
                } finally {
                    os.close();
                }
            } finally {
                is.close();
            }
        }
        if (copyAttrs) {
            BasicFileAttributeView view =
                ZipFileAttributeView.get(target, BasicFileAttributeView.class);
            try {
                view.setTimes(zfas.lastModifiedTime(),
                              zfas.lastAccessTime(),
                              zfas.creationTime());
            } catch (IOException x) {
                // rollback?
                try {
                    target.delete();
                } catch (IOException ignore) { }
                throw x;
            }
        }
    }

    private static int decode(char c) {
        if ((c >= '0') && (c <= '9'))
            return c - '0';
        if ((c >= 'a') && (c <= 'f'))
            return c - 'a' + 10;
        if ((c >= 'A') && (c <= 'F'))
            return c - 'A' + 10;
        assert false;
        return -1;
    }

    // to avoid double escape
    static String decodeUri(String s) {
        if (s == null)
            return s;
        int n = s.length();
        if (n == 0)
            return s;
        if (s.indexOf('%') < 0)
            return s;

        StringBuilder sb = new StringBuilder(n);
        byte[] bb = new byte[n];
        boolean betweenBrackets = false;

        for (int i = 0; i < n;) {
            char c = s.charAt(i);
            if (c == '[') {
                betweenBrackets = true;
            } else if (betweenBrackets && c == ']') {
                betweenBrackets = false;
            }
            if (c != '%' || betweenBrackets ) {
                sb.append(c);
                i++;
                continue;
            }
            int nb = 0;
            while (c == '%') {
                assert (n - i >= 2);
                bb[nb++] = (byte)(((decode(s.charAt(++i)) & 0xf) << 4) |
                                  (decode(s.charAt(++i)) & 0xf));
                if (++i >= n) {
                    break;
                }
                c = s.charAt(i);
            }
            sb.append(new String(bb, 0, nb, UTF_8));
        }
        return sb.toString();
    }
}