Streams

Streams module provides classes and utilities for working with streams.

Overview

• Module: io/streams
• Definition: https://github.com/eclipse/dirigible/issues/51
• Source: /io/streams.js
• Status: stable
• Group: core

Basic Usage

ECMA6

import { streams } from "sdk/io";
import { response } from "sdk/http";

let outputStream = streams.createByteArrayOutputStream();

outputStream.writeText("Some text content");

let bytes = outputStream.getBytes();
response.println("[Stream Content as Bytes]: " + bytes);

let text = String.fromCharCode.apply(String, bytes);
response.println("[Stream Content as Text]: " + text);

let inputStream = streams.createByteArrayInputStream(bytes);
let outputStreamCopy = streams.createByteArrayOutputStream();
streams.copy(inputStream, outputStreamCopy);
let copiedBytes = outputStreamCopy.getBytes();
let copiedText = String.fromCharCode.apply(String, copiedBytes);
response.println("[Stream Copied Content as Text]: " + copiedText);

response.flush();
response.close();

Functions

---

Function	Description	Returns
copy(inputStream, outputStream)	Copies an InputStream to an OutputStream	-
createByteArrayInputStream(bytes)	Creates an ByteArrayInputStream from the array of bytes	ByteArrayInputStream
createByteArrayOutputStream()	Creates an ByteArrayOutputStream	ByteArrayOutputStream

Objects

---

InputStream

Function	Description	Returns
readByte()	Reads a single byte from this InputStream	byte
readBytes()	Returns the array of bytes contained in this InputStream	array of byte
readText()	Returns a string representation of the array of bytes contained in this InputStream	string
close()	Closes this InputStream to release the resources	-

OutputStream

Function	Description	Returns
writeByte(byte)	Writes a single byte to this OutputStream	-
writeBytes(bytes)	Writes the array of bytes to this OutputStream	array of byte
readText()	Returns a string representation of the array of bytes contained in this InputStream	string
close()	Closes this OutputStream to release the resources	-

ByteArrayInputStream

inherited from InputStream

ByteArrayOutputStream

inherited from OutputStream and:

Function	Description	Returns
getBytes()	Returns the array of bytes contained in this ByteArrayOutputStream	array of byte
getText()	Returns a string representation of the array of bytes contained in this ByteArrayOutputStream	string