io.vertx.rxjava.core.parsetools

## Class JsonParser

- java.lang.Object
- - io.vertx.rxjava.core.parsetools.JsonParser

- All Implemented Interfaces:
    Handler<Buffer>, ReadStream<JsonEvent>, StreamBase

      public class JsonParser
      extends Object
      implements ReadStream<JsonEvent>, Handler<Buffer>

  A parser class which allows to incrementally parse json elements and emit json parse events instead of parsing a json element fully. This parser is convenient for parsing large json structures.

  The parser also parses concatenated json streams or line delimited json streams.

  The parser can also parse entire object or array when it is convenient, for instance a very large array of small objects can be parsed efficiently by handling array start/end and object events.

  Whenever the parser fails to parse or process the stream, the `exceptionHandler(io.vertx.core.Handler<java.lang.Throwable>)` is called with the cause of the failure and the current handling stops. After such event, the parser should not handle data anymore.

  NOTE: This class has been automatically generated from the `original` non RX-ified interface using Vert.x codegen.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static io.vertx.lang.rx.TypeArg<JsonParser>` | `__TYPE_ARG`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `JsonParser(JsonParser delegate)`
    `JsonParser(Object delegate)`

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
    Modifier and Type | Method and Description
    --- | ---
    `JsonParser` | `arrayEventMode()` Flip the parser to emit a stream of events for each new json array.
    `JsonParser` | `arrayValueMode()` Flip the parser to emit a single value event for each new json array.
    `void` | `end()` End the stream, this must be called after all the json stream has been processed.
    `JsonParser` | `endHandler(Handler<Void> endHandler)` Set an end handler.
    `boolean` | `equals(Object o)`
    `JsonParser` | `exceptionHandler(Handler<Throwable> handler)` Set an exception handler on the read stream.
    `JsonParser` | `fetch(long amount)` Fetch the specified `amount` of elements.
    `JsonParser` | `getDelegate()`
    `void` | `handle(Buffer event)` Something has happened, so handle it.
    `JsonParser` | `handler(Handler<JsonEvent> handler)` Set a data handler.
    `int` | `hashCode()`
    `static JsonParser` | `newInstance(JsonParser arg)`
    `static JsonParser` | `newParser()` Create a new `JsonParser` instance.
    `static JsonParser` | `newParser(Observable<Buffer> stream)` Create a new `JsonParser` instance.
    `static JsonParser` | `newParser(ReadStream<Buffer> stream)` Create a new `JsonParser` instance.
    `JsonParser` | `objectEventMode()` Flip the parser to emit a stream of events for each new json object.
    `JsonParser` | `objectValueMode()` Flip the parser to emit a single value event for each new json object.
    `JsonParser` | `pause()` Pause the `ReadStream`, it sets the buffer in `fetch` mode and clears the actual demand.
    `Pipe<JsonEvent>` | `pipe()` Pause this stream and return a to transfer the elements of this stream to a destination .
    `void` | `pipeTo(WriteStream<JsonEvent> dst)` Like `ReadStream.pipeTo(io.vertx.rxjava.core.streams.WriteStream<T>)` but with no completion handler.
    `void` | `pipeTo(WriteStream<JsonEvent> dst, Handler<AsyncResult<Void>> handler)` Pipe this `ReadStream` to the `WriteStream`.
    `Observable<Void>` | `pipeToObservable(WriteStream<JsonEvent> dst)` Deprecated. use `rxPipeTo(io.vertx.rxjava.core.streams.WriteStream<io.vertx.rxjava.core.parsetools.JsonEvent>)` instead
    `JsonParser` | `resume()` Resume reading, and sets the buffer in `flowing` mode.
    `Single<Void>` | `rxPipeTo(WriteStream<JsonEvent> dst)` Pipe this `ReadStream` to the `WriteStream`.
    `Observable<JsonEvent>` | `toObservable()`
    `String` | `toString()`
    `JsonParser` | `write(Buffer buffer)` Handle a `Buffer`, pretty much like calling `Handler`.

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

    - ### Methods inherited from interface io.vertx.rxjava.core.streams.ReadStream

      `newInstance, newInstance`

    - ### Methods inherited from interface io.vertx.rxjava.core.streams.StreamBase

      `newInstance`

- - ### Field Detail

    - #### __TYPE_ARG

          public static final io.vertx.lang.rx.TypeArg<JsonParser> __TYPE_ARG

  - ### Constructor Detail

    - #### JsonParser

          public JsonParser(JsonParser delegate)

    - #### JsonParser

          public JsonParser(Object delegate)

  - ### Method Detail

    - #### toString

          public String toString()

      Overrides:
        `toString` in class `Object`

    - #### equals

          public boolean equals(Object o)

      Overrides:
        `equals` in class `Object`

    - #### hashCode

          public int hashCode()

      Overrides:
        `hashCode` in class `Object`

    - #### getDelegate

          public JsonParser getDelegate()

      Specified by:
        `getDelegate` in interface `ReadStream<JsonEvent>`
      Specified by:
        `getDelegate` in interface `StreamBase`

    - #### toObservable

          public Observable<JsonEvent> toObservable()

      Specified by:
        `toObservable` in interface `ReadStream<JsonEvent>`

    - #### handle

          public void handle(Buffer event)

      Something has happened, so handle it.
      Specified by:
        `handle` in interface `Handler<Buffer>`
      Parameters:
        `event` - the event to handle

    - #### pipe

          public Pipe<JsonEvent> pipe()

      Pause this stream and return a to transfer the elements of this stream to a destination .

      The stream will be resumed when the pipe will be wired to a `WriteStream`.
      Specified by:
        `pipe` in interface `ReadStream<JsonEvent>`
      Returns:
        a pipe

    - #### pipeTo

          public void pipeTo(WriteStream<JsonEvent> dst)

      Like `ReadStream.pipeTo(io.vertx.rxjava.core.streams.WriteStream<T>)` but with no completion handler.
      Specified by:
        `pipeTo` in interface `ReadStream<JsonEvent>`
      Parameters:
        `dst` -

    - #### pipeTo

          public void pipeTo(WriteStream<JsonEvent> dst,
                             Handler<AsyncResult<Void>> handler)

      Pipe this `ReadStream` to the `WriteStream`.

      Elements emitted by this stream will be written to the write stream until this stream ends or fails.

      Once this stream has ended or failed, the write stream will be ended and the `handler` will be called with the result.

      Specified by:
        `pipeTo` in interface `ReadStream<JsonEvent>`
      Parameters:
        `dst` - the destination write stream
        `handler` -

    - #### pipeToObservable

          @Deprecated
          public Observable<Void> pipeToObservable(WriteStream<JsonEvent> dst)

      Deprecated. use `rxPipeTo(io.vertx.rxjava.core.streams.WriteStream<io.vertx.rxjava.core.parsetools.JsonEvent>)` instead
      Pipe this `ReadStream` to the `WriteStream`.

      Elements emitted by this stream will be written to the write stream until this stream ends or fails.

      Once this stream has ended or failed, the write stream will be ended and the `handler` will be called with the result.

      Parameters:
        `dst` - the destination write stream
      Returns:

    - #### rxPipeTo

          public Single<Void> rxPipeTo(WriteStream<JsonEvent> dst)

      Pipe this `ReadStream` to the `WriteStream`.

      Elements emitted by this stream will be written to the write stream until this stream ends or fails.

      Once this stream has ended or failed, the write stream will be ended and the `handler` will be called with the result.

      Parameters:
        `dst` - the destination write stream
      Returns:

    - #### newParser

          public static JsonParser newParser()

      Create a new `JsonParser` instance.
      Returns:

    - #### newParser

          public static JsonParser newParser(ReadStream<Buffer> stream)

      Create a new `JsonParser` instance.
      Parameters:
        `stream` -
      Returns:

    - #### newParser

          public static JsonParser newParser(Observable<Buffer> stream)

      Create a new `JsonParser` instance.
      Parameters:
        `stream` -
      Returns:

    - #### write

          public JsonParser write(Buffer buffer)

      Handle a `Buffer`, pretty much like calling `Handler`.
      Parameters:
        `buffer` -
      Returns:
        a reference to this, so the API can be used fluently

    - #### end

          public void end()

      End the stream, this must be called after all the json stream has been processed.

    - #### objectEventMode

          public JsonParser objectEventMode()

      Flip the parser to emit a stream of events for each new json object.
      Returns:
        a reference to this, so the API can be used fluently

    - #### objectValueMode

          public JsonParser objectValueMode()

      Flip the parser to emit a single value event for each new json object. Json object currently streamed won't be affected.
      Returns:
        a reference to this, so the API can be used fluently

    - #### arrayEventMode

          public JsonParser arrayEventMode()

      Flip the parser to emit a stream of events for each new json array.
      Returns:
        a reference to this, so the API can be used fluently

    - #### arrayValueMode

          public JsonParser arrayValueMode()

      Flip the parser to emit a single value event for each new json array. Json array currently streamed won't be affected.
      Returns:
        a reference to this, so the API can be used fluently

    - #### pause

          public JsonParser pause()

      Description copied from interface: `ReadStream`
      Pause the `ReadStream`, it sets the buffer in `fetch` mode and clears the actual demand.

      While it's paused, no data will be sent to the data `handler`.

      Specified by:
        `pause` in interface `ReadStream<JsonEvent>`
      Returns:
        a reference to this, so the API can be used fluently

    - #### resume

          public JsonParser resume()

      Description copied from interface: `ReadStream`
      Resume reading, and sets the buffer in `flowing` mode.

      If the `ReadStream` has been paused, reading will recommence on it.
      Specified by:
        `resume` in interface `ReadStream<JsonEvent>`
      Returns:
        a reference to this, so the API can be used fluently

    - #### fetch

          public JsonParser fetch(long amount)

      Description copied from interface: `ReadStream`
      Fetch the specified `amount` of elements. If the `ReadStream` has been paused, reading will recommence with the specified `amount` of items, otherwise the specified `amount` will be added to the current stream demand.
      Specified by:
        `fetch` in interface `ReadStream<JsonEvent>`
      Returns:
        a reference to this, so the API can be used fluently

    - #### endHandler

          public JsonParser endHandler(Handler<Void> endHandler)

      Description copied from interface: `ReadStream`
      Set an end handler. Once the stream has ended, and there is no more data to be read, this handler will be called.
      Specified by:
        `endHandler` in interface `ReadStream<JsonEvent>`
      Returns:
        a reference to this, so the API can be used fluently

    - #### handler

          public JsonParser handler(Handler<JsonEvent> handler)

      Description copied from interface: `ReadStream`
      Set a data handler. As data is read, the handler will be called with the data.
      Specified by:
        `handler` in interface `ReadStream<JsonEvent>`
      Returns:
        a reference to this, so the API can be used fluently

    - #### exceptionHandler

          public JsonParser exceptionHandler(Handler<Throwable> handler)

      Description copied from interface: `ReadStream`
      Set an exception handler on the read stream.
      Specified by:
        `exceptionHandler` in interface `ReadStream<JsonEvent>`
      Specified by:
        `exceptionHandler` in interface `StreamBase`
      Parameters:
        `handler` - the exception handler
      Returns:
        a reference to this, so the API can be used fluently

    - #### newInstance

          public static JsonParser newInstance(JsonParser arg)

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