Struct Header

pub struct Header {
    pub version: u16,
    pub compression_type: CompressionType,
    pub compression_codec: Option<Codec>,
    pub key_class: String,
    pub value_class: String,
    pub metadata: HashMap<String, String>,
    /* private fields */
}

Expand description

Sequencefile header, metadata about the file, e.g. key/value types, version, compression and some internal state for properly decoding

Fields§

§version: u16

Sequencefile version Version 4 - block compression Version 5 - custom compression codecs Version 6 - metadata

§compression_type: CompressionType

Type of value compression

§compression_codec: Option<Codec>

Codec, if any

§key_class: String

Fully-qualified Java class of key Writable

§value_class: String

Fully-qualified Java class of value Writable

§metadata: HashMap<String, String>

K-V metadata on sequencefile

Trait Implementations§

impl Debug for Header

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Auto Trait Implementations§

impl Freeze for Header

impl RefUnwindSafe for Header

impl Send for Header

impl Sync for Header

impl Unpin for Header

impl UnwindSafe for Header

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.