Class InMemoryFile

java.lang.Object

org.ojalgo.netio.InMemoryFile

public class InMemoryFile
extends Object

An in-memory "file" that can be used with some ToFileWriter and/or

invalid reference

FromFileReaderr

implementations instead of a File.

To dynamically create file contents that only exist in memory (for download): Feed an instance of InMemoryFile rather than File to a ToFileWriter that support doing so (like the TextLineWriter), and keep a reference to the InMemoryFile instance. When done writing you get the (file) contents from that instance.

To parse some data you have in memory: Create an instance of InMemoryFile using one of the constructors that take byte[] or String as input, and feed that to a FromFileReader that support doing so (like the TextLineReader).

Note that you can obtain both OutputStream and InputStream instances from an InMemoryFile – you can write to AND (later) read from the same instance.

This class is essentially a byte[] wrapper making use of ByteArrayInputStream and ByteArrayOutputStream.

Field Summary

Fields

Modifier and Type	Field	Description
private byte[]	myInitialContents
private ByteArrayInputStream	myInputStream
private String	myName
private ByteArrayOutputStream	myOutputStream
private String	myType

Constructor Summary

Constructors

Constructor	Description
InMemoryFile()
InMemoryFile(byte[] contents)
InMemoryFile(String contents)

Method Summary

Modifier and Type	Method	Description
byte[]	getContentsAsByteArray()
String	getContentsAsString()
Optional<String>	getName()	File Name
Optional<String>	getType()	Media (content) Type
InMemoryFile	name(String name)
InputStream	newInputStream()	Creates a new InputStream with each invocation (but keeps a reference to it for later internal use).
OutputStream	newOutputStream()	Creates a new OutputStream with each invocation (but keeps a reference to it for later internal use).
void	setName(String name)
void	setType(String type)
InMemoryFile	type(String type)

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

myInitialContents

private byte[] myInitialContents

myInputStream

private ByteArrayInputStream myInputStream

myName

private String myName

myOutputStream

private ByteArrayOutputStream myOutputStream

myType

private String myType

Constructor Details

InMemoryFile

public InMemoryFile()

InMemoryFile

public InMemoryFile(byte[] contents)

InMemoryFile

public InMemoryFile(String contents)

Method Details

getContentsAsByteArray

public byte[] getContentsAsByteArray()

getContentsAsString

public String getContentsAsString()

getName

public Optional<String> getName()

File Name

getType

public Optional<String> getType()

Media (content) Type

name

public InMemoryFile name(String name)

newInputStream

public InputStream newInputStream()

Creates a new InputStream with each invocation (but keeps a reference to it for later internal use). The actual "input" is taken from the contents provided to the constructor or what was later written to an OutputStream obtained via newOutputStream().

newOutputStream

public OutputStream newOutputStream()

Creates a new OutputStream with each invocation (but keeps a reference to it for later internal use). Calling this method also clears any/all cached previous contents – you're expected to create new content with this.

setName

public void setName(String name)

setType

public void setType(String type)

type

public InMemoryFile type(String type)