org.crsh.shell.impl.command
Class InvocationContextImpl<P>

java.lang.Object
  org.crsh.shell.impl.command.AbstractInvocationContext<P>
      org.crsh.shell.impl.command.InvocationContextImpl<P>

All Implemented Interfaces:

Appendable, CommandContext<P>, InvocationContext<P>, RuntimeContext, InteractionContext, Consumer<P>, Screenable, ScreenContext

public final class InvocationContextImpl<P>
extends AbstractInvocationContext<P>

Field Summary

private static int	CLOSED .
private CommandContext<P>	commandContext .
private static int	FLUSHED .
(package private) int	status .
private RenderPrintWriter	writer .
private static int	WRITTEN .

Constructor Summary

InvocationContextImpl(CommandContext<P> commandContext)

Method Summary

Screenable	append(char c)
Screenable	append(CharSequence s)
Screenable	append(CharSequence csq, int start, int end)
Screenable	append(Style style)
void	close()
Screenable	cls()
void	flush() Flush the stream.
Map<String,Object>	getAttributes() Returns the current attributes.
Class<P>	getConsumedType() Returns the class of the element generic type.
int	getHeight() Returns the screen height in chars.
String	getProperty(String propertyName) Returns a generic property, usually this property is resolved by the shell client.
Map<String,Object>	getSession() Returns the current session.
int	getWidth() Returns the screen width in chars.
RenderPrintWriter	getWriter() Returns the writer for the output.
void	provide(P element) Provide an element.
String	readLine(String msg, boolean echo) Display a message and read a line on the console, this method call can be blocking until the user provides a value.
boolean	releaseAlternateBuffer() Release control of the alternate buffer.
CommandInvoker<?,?>	resolve(String s) Resolve a command invoker for the specified command line.
boolean	takeAlternateBuffer() Take control of the alternate buffer.

Methods inherited from class org.crsh.shell.impl.command.AbstractInvocationContext

leftShift

Methods inherited from class java.lang.Object

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

Field Detail

WRITTEN

private static final int WRITTEN

.

See Also:

Constant Field Values

FLUSHED

private static final int FLUSHED

.

See Also:

Constant Field Values

CLOSED

private static final int CLOSED

.

See Also:

Constant Field Values

commandContext

private final CommandContext<P> commandContext

.

writer

private RenderPrintWriter writer

.

status

int status

.

Constructor Detail

InvocationContextImpl

public InvocationContextImpl(CommandContext<P> commandContext)

Method Detail

getWriter

public RenderPrintWriter getWriter()

Description copied from interface: InvocationContext

Returns the writer for the output.

Returns:

the writer

takeAlternateBuffer

public boolean takeAlternateBuffer()
                            throws IOException

Description copied from interface: InteractionContext

Take control of the alternate buffer. When the alternate buffer is already used nothing happens. The buffer switch should occur when then ScreenContext.flush() method is invoked.

Returns:

true if the alternate buffer is shown

Throws:

IOException

releaseAlternateBuffer

public boolean releaseAlternateBuffer()
                               throws IOException

Description copied from interface: InteractionContext

Release control of the alternate buffer. When the normal buffer is already used nothing happens. The buffer switch should occur when then ScreenContext.flush() method is invoked.

Returns:

true if the usual buffer is shown

Throws:

IOException

resolve

public CommandInvoker<?,?> resolve(String s)
                            throws CommandException

Description copied from interface: InvocationContext

Resolve a command invoker for the specified command line.

Parameters:

s - the command line

Returns:

the command invoker

Throws:

CommandException - any command exception

getConsumedType

public Class<P> getConsumedType()

Description copied from interface: Consumer

Returns the class of the element generic type.

Returns:

the consumed type

getProperty

public String getProperty(String propertyName)

Description copied from interface: InteractionContext

Returns a generic property, usually this property is resolved by the shell client.

Parameters:

propertyName - the property name

Returns:

the property value

readLine

public String readLine(String msg,
                       boolean echo)
                throws IOException,
                       InterruptedException

Description copied from interface: InteractionContext

Display a message and read a line on the console, this method call can be blocking until the user provides a value. If no line can be read then null is returned.

Parameters:

msg - the message to display before reading a line

echo - wether or not the line read should be echoed when typing

Returns:

the line read

Throws:

IOException - any io exception

InterruptedException - the thread was interrupted while waiting for the user value

getWidth

public int getWidth()

Description copied from interface: ScreenContext

Returns the screen width in chars. When the value is not positive it means the value could not be determined.

Returns:

the term width

getHeight

public int getHeight()

Description copied from interface: ScreenContext

Returns the screen height in chars. When the value is not positive it means the value could not be determined.

Returns:

the term height

append

public Screenable append(CharSequence s)
                  throws IOException

Throws:

IOException

append

public Screenable append(char c)
                  throws IOException

Throws:

IOException

append

public Screenable append(CharSequence csq,
                         int start,
                         int end)
                  throws IOException

Throws:

IOException

append

public Screenable append(Style style)
                  throws IOException

Throws:

IOException

cls

public Screenable cls()
               throws IOException

Throws:

IOException

provide

public void provide(P element)
             throws Exception

Description copied from interface: Consumer

Provide an element.

Parameters:

element - the provided element

Throws:

Exception - any exception

flush

public void flush()
           throws IOException

Description copied from interface: Consumer

Flush the stream.

Throws:

IOException - any io exception

close

public void close()
           throws Exception

Throws:

Exception

getSession

public Map<String,Object> getSession()

Description copied from interface: RuntimeContext

Returns the current session.

Returns:

the session map

getAttributes

public Map<String,Object> getAttributes()

Description copied from interface: RuntimeContext

Returns the current attributes.

Returns:

the attributes map