Example usage for java.nio.file.attribute UserDefinedFileAttributeView read

Introduction

In this page you can find the example usage for java.nio.file.attribute UserDefinedFileAttributeView read.

Prototype

int read(String name, ByteBuffer dst) throws IOException;

Source Link

Document

Read the value of a user-defined attribute into a buffer.

Usage

From source file:Test.java

public static void main(String[] args) throws Exception {
    Path path = Paths.get("C:/home/docs/users.txt");

    UserDefinedFileAttributeView view = Files.getFileAttributeView(path, UserDefinedFileAttributeView.class);
    view.write("publishable", Charset.defaultCharset().encode("true"));
    System.out.println("Publishable set");

    String name = "publishable";
    ByteBuffer buffer = ByteBuffer.allocate(view.size(name));
    view.read(name, buffer);
    buffer.flip();//  w  w  w  .  jav a  2  s .  c  o m
    String value = Charset.defaultCharset().decode(buffer).toString();
    System.out.println(value);

}

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From source file:org.italiangrid.storm.webdav.fs.attrs.DefaultExtendedFileAttributesHelper.java

protected String getAttributeValue(UserDefinedFileAttributeView view, String attributeName) throws IOException {

    if (view.list().contains(attributeName)) {
        ByteBuffer buffer = ByteBuffer.allocateDirect(view.size(attributeName));
        view.read(attributeName, buffer);
        buffer.flip();//w  w  w .j a  va 2s .  c om
        return StandardCharsets.UTF_8.decode(buffer).toString();
    } else {
        return "";
    }
}

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From source file:org.jclouds.kinetic.strategy.internal.KineticStorageStrategyImpl.java

private Blob createBlobFromByteSource(final String container, final String key, final ByteSource byteSource) {
    BlobBuilder builder = blobBuilders.get();
    builder.name(key);// www  .  ja  v a 2s  .co  m
    File file = getFileForBlobKey(container, key);
    try {
        String cacheControl = null;
        String contentDisposition = null;
        String contentEncoding = null;
        String contentLanguage = null;
        String contentType = null;
        HashCode hashCode = null;
        Date expires = null;
        ImmutableMap.Builder<String, String> userMetadata = ImmutableMap.builder();

        UserDefinedFileAttributeView view = getUserDefinedFileAttributeView(file.toPath());
        if (view != null) {
            Set<String> attributes = ImmutableSet.copyOf(view.list());

            cacheControl = readStringAttributeIfPresent(view, attributes, XATTR_CACHE_CONTROL);
            contentDisposition = readStringAttributeIfPresent(view, attributes, XATTR_CONTENT_DISPOSITION);
            contentEncoding = readStringAttributeIfPresent(view, attributes, XATTR_CONTENT_ENCODING);
            contentLanguage = readStringAttributeIfPresent(view, attributes, XATTR_CONTENT_LANGUAGE);
            contentType = readStringAttributeIfPresent(view, attributes, XATTR_CONTENT_TYPE);
            if (contentType == null && autoDetectContentType) {
                contentType = probeContentType(file.toPath());
            }
            if (attributes.contains(XATTR_CONTENT_MD5)) {
                ByteBuffer buf = ByteBuffer.allocate(view.size(XATTR_CONTENT_MD5));
                view.read(XATTR_CONTENT_MD5, buf);
                hashCode = HashCode.fromBytes(buf.array());
            }
            if (attributes.contains(XATTR_EXPIRES)) {
                ByteBuffer buf = ByteBuffer.allocate(view.size(XATTR_EXPIRES));
                view.read(XATTR_EXPIRES, buf);
                buf.flip();
                expires = new Date(buf.asLongBuffer().get());
            }
            for (String attribute : attributes) {
                if (!attribute.startsWith(XATTR_USER_METADATA_PREFIX)) {
                    continue;
                }
                String value = readStringAttributeIfPresent(view, attributes, attribute);
                userMetadata.put(attribute.substring(XATTR_USER_METADATA_PREFIX.length()), value);
            }

            builder.payload(byteSource).cacheControl(cacheControl).contentDisposition(contentDisposition)
                    .contentEncoding(contentEncoding).contentLanguage(contentLanguage)
                    .contentLength(byteSource.size()).contentMD5(hashCode).contentType(contentType)
                    .expires(expires).userMetadata(userMetadata.build());
        } else {
            builder.payload(byteSource).contentLength(byteSource.size())
                    .contentMD5(byteSource.hash(Hashing.md5()).asBytes());
        }
    } catch (IOException e) {
        throw Throwables.propagate(e);
    }
    Blob blob = builder.build();
    blob.getMetadata().setContainer(container);
    blob.getMetadata().setLastModified(new Date(file.lastModified()));
    blob.getMetadata().setSize(file.length());
    if (blob.getPayload().getContentMetadata().getContentMD5() != null)
        blob.getMetadata()
                .setETag(base16().lowerCase().encode(blob.getPayload().getContentMetadata().getContentMD5()));
    return blob;
}

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From source file:org.jclouds.kinetic.strategy.internal.KineticStorageStrategyImpl.java

/** Read the String representation of kinetic attribute, or return null if not present. */
private static String readStringAttributeIfPresent(UserDefinedFileAttributeView view, Set<String> attributes,
        String name) throws IOException {
    if (!attributes.contains(name)) {
        return null;
    }/*from  w w  w.j  av a  2 s.  c o  m*/
    ByteBuffer buf = ByteBuffer.allocate(view.size(name));
    view.read(name, buf);
    return new String(buf.array(), StandardCharsets.UTF_8);
}

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From source file:org.ms123.common.git.FileObject.java

public String getString(String key) throws IOException {
    Path path = getPath();/*www  .  j  a va  2 s. c  om*/
    UserDefinedFileAttributeView view = Files.getFileAttributeView(path, UserDefinedFileAttributeView.class);
    ByteBuffer bb = ByteBuffer.allocateDirect(64);
    int num = view.read(key, bb);
    bb.flip();
    return Charset.defaultCharset().decode(bb).toString();
}

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