/*
* Copyright (c) 2009, 2011, Oracle and/or its affiliates. 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 Oracle 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,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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/*
* This source code is provided to illustrate the usage of a given feature
* or technique and has been deliberately simplified. Additional steps
* required for a production-quality application, such as security checks,
* input validation and proper error handling, might not be present in
* this sample code.
*/
package com.sun.nio.zipfs;
import java.nio.file.DirectoryStream;
import java.nio.file.ClosedDirectoryStreamException;
import java.nio.file.NotDirectoryException;
import java.nio.file.Path;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.io.IOException;
/**
*
* @author Xueming Shen, Rajendra Gutupalli, Jaya Hangal
*/
public class ZipDirectoryStream implements DirectoryStream<Path> {
private final ZipFileSystem zipfs;
private final byte[] path;
private final DirectoryStream.Filter<? super Path> filter;
private volatile boolean isClosed;
private volatile Iterator<Path> itr;
ZipDirectoryStream(ZipPath zipPath,
DirectoryStream.Filter<? super java.nio.file.Path> filter)
throws IOException
{
this.zipfs = zipPath.getFileSystem();
this.path = zipPath.getResolvedPath();
this.filter = filter;
// sanity check
if (!zipfs.isDirectory(path))
throw new NotDirectoryException(zipPath.toString());
}
@Override
public synchronized Iterator<Path> iterator() {
if (isClosed)
throw new ClosedDirectoryStreamException();
if (itr != null)
throw new IllegalStateException("Iterator has already been returned");
try {
itr = zipfs.iteratorOf(path, filter);
} catch (IOException e) {
throw new IllegalStateException(e);
}
return new Iterator<Path>() {
private Path next;
@Override
public boolean hasNext() {
if (isClosed)
return false;
return itr.hasNext();
}
@Override
public synchronized Path next() {
if (isClosed)
throw new NoSuchElementException();
return itr.next();
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
};
}
@Override
public synchronized void close() throws IOException {
isClosed = true;
}
}