Example usage for java.nio.file AtomicMoveNotSupportedException AtomicMoveNotSupportedException

Introduction

In this page you can find the example usage for java.nio.file AtomicMoveNotSupportedException AtomicMoveNotSupportedException.

Prototype

public AtomicMoveNotSupportedException(String source, String target, String reason) 

Source Link

Document

Constructs an instance of this class.

Usage

From source file:org.cryptomator.cryptofs.CryptoFileSystemImpl.java

void move(CryptoPath cleartextSource, CryptoPath cleartextTarget, CopyOption... options) throws IOException {
    if (cleartextSource.equals(cleartextTarget)) {
        return;//from   w w  w  . ja  v a 2  s  . c  om
    }
    Path ciphertextSourceFile = cryptoPathMapper.getCiphertextFilePath(cleartextSource,
            CiphertextFileType.FILE);
    Path ciphertextSourceDirFile = cryptoPathMapper.getCiphertextFilePath(cleartextSource,
            CiphertextFileType.DIRECTORY);
    if (Files.exists(ciphertextSourceFile)) {
        // FILE:
        Path ciphertextTargetFile = cryptoPathMapper.getCiphertextFilePath(cleartextTarget,
                CiphertextFileType.FILE);
        Files.move(ciphertextSourceFile, ciphertextTargetFile, options);
    } else if (Files.exists(ciphertextSourceDirFile)) {
        // DIRECTORY:
        Path ciphertextTargetDirFile = cryptoPathMapper.getCiphertextFilePath(cleartextTarget,
                CiphertextFileType.DIRECTORY);
        if (!ArrayUtils.contains(options, StandardCopyOption.REPLACE_EXISTING)) {
            // try to move, don't replace:
            Files.move(ciphertextSourceDirFile, ciphertextTargetDirFile, options);
        } else if (ArrayUtils.contains(options, StandardCopyOption.ATOMIC_MOVE)) {
            // replace atomically (impossible):
            assert ArrayUtils.contains(options, StandardCopyOption.REPLACE_EXISTING);
            throw new AtomicMoveNotSupportedException(cleartextSource.toString(), cleartextTarget.toString(),
                    "Replacing directories during move requires non-atomic status checks.");
        } else {
            // move and replace (if dir is empty):
            assert ArrayUtils.contains(options, StandardCopyOption.REPLACE_EXISTING);
            assert !ArrayUtils.contains(options, StandardCopyOption.ATOMIC_MOVE);
            if (Files.exists(ciphertextTargetDirFile)) {
                Path ciphertextTargetDir = cryptoPathMapper.getCiphertextDirPath(cleartextTarget);
                try (DirectoryStream<Path> ds = Files.newDirectoryStream(ciphertextTargetDir)) {
                    if (ds.iterator().hasNext()) {
                        throw new DirectoryNotEmptyException(cleartextTarget.toString());
                    }
                }
                Files.delete(ciphertextTargetDir);
            }
            Files.move(ciphertextSourceDirFile, ciphertextTargetDirFile, options);
        }
        dirIdProvider.move(ciphertextSourceDirFile, ciphertextTargetDirFile);
    } else {
        throw new NoSuchFileException(cleartextSource.toString());
    }
}

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