Package net.hydromatic.morel.eval

Class Session

java.lang.Object

net.hydromatic.morel.eval.Session

public class Session
extends Object

Session environment.

Accessible from EvalEnv.getOpt(String) via the hidden "$session" variable.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	Session.Shell	Callback to implement "use" command.
private static enum	Session.Shells	Various implementations of Session.Shell.

Field Summary

Fields

Modifier and Type	Field	Description
Code	code	The plan of the previous command.
final Supplier<File>	file	File system.
final Map<Prop,Object>	map	Property values.
List<String>	out	The output lines of the previous command.
private Session.Shell	shell	Implementation of "use".

Constructor Summary

Constructors

Constructor	Description
Session(Map<Prop,Object> map)	Creates a Session.

Method Summary

Modifier and Type	Method	Description
void	handle(MorelException e, StringBuilder buf)
void	use(String fileName, Pos pos)
void	withoutHandlingExceptions(Consumer<Session> consumer)	Calls some code with a Session.Shell that does not handle errors.
void	withShell(Session.Shell shell, Consumer<String> outLines, Consumer<Session> consumer)	Calls some code with a new value of Session.Shell.

Methods inherited from class java.lang.Object

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

Field Details

code

public Code code

The plan of the previous command.

out

public List<String> out

The output lines of the previous command.

map

public final Map<Prop,Object> map

Property values.

file

public final Supplier<File> file

File system.

Wrapped in a Supplier to avoid the cost of initializing it (scanning a directory) for every session.

shell

private Session.Shell shell

Implementation of "use".

Constructor Details

Session

public Session(Map<Prop,Object> map)

Creates a Session.

The map parameter, that becomes the property map, is used as is, not copied. It may be immutable if the session is for a narrow, internal use. Otherwise, it should probably be a LinkedHashMap to provide deterministic iteration order.

Parameters:

map - Map that contains property values

Method Details

withShell

public void withShell(Session.Shell shell,
 Consumer<String> outLines,
 Consumer<Session> consumer)

Calls some code with a new value of Session.Shell.

withoutHandlingExceptions

public void withoutHandlingExceptions(Consumer<Session> consumer)

Calls some code with a Session.Shell that does not handle errors.

use

public void use(String fileName,
 Pos pos)

handle

public void handle(MorelException e,
 StringBuilder buf)