org.crsh.command
Class InvocationContextImpl<P>

java.lang.Object
  org.crsh.command.InvocationContextImpl<P>

All Implemented Interfaces:

Closeable, Flushable, CommandContext<P>, InvocationContext<P>, RuntimeContext, Consumer<P>, InteractionContext<P>, ScreenContext<P>

final class InvocationContextImpl<P>
extends Object
implements InvocationContext<P>

Field Summary

private CommandContext<P>	commandContext .
private RenderPrintWriter	writer .

Constructor Summary

InvocationContextImpl(CommandContext<P> commandContext)

Method Summary

void	close()
void	flush()
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.
boolean	isPiped()
InvocationContextImpl<P>	leftShift(Object o)
void	provide(P element) Provide an element.
String	readLine(String msg, boolean echo) Display a message and read a line on the console.
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 java.lang.Object

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

Field Detail

commandContext

private final CommandContext<P> commandContext

.

writer

private RenderPrintWriter writer

.

Constructor Detail

InvocationContextImpl

InvocationContextImpl(CommandContext<P> commandContext)

Method Detail

isPiped

public boolean isPiped()

Specified by:

isPiped in interface CommandContext<P>

getWriter

public RenderPrintWriter getWriter()

Description copied from interface: InvocationContext

Returns the writer for the output.

Specified by:

getWriter in interface InvocationContext<P>

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 Flushable.flush() method is invoked.

Specified by:

takeAlternateBuffer in interface InteractionContext<P>

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 Flushable.flush() method is invoked.

Specified by:

releaseAlternateBuffer in interface InteractionContext<P>

Returns:

true if the usual buffer is shown

Throws:

IOException

resolve

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

Description copied from interface: InvocationContext

Resolve a command invoker for the specified command line.

Specified by:

resolve in interface InvocationContext<P>

Parameters:

s - the command line

Returns:

the command invoker

Throws:

ScriptException - any script exception

IOException - any io exception

getConsumedType

public Class<P> getConsumedType()

Description copied from interface: Consumer

Returns the class of the element generic type.

Specified by:

getConsumedType in interface Consumer<P>

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.

Specified by:

getProperty in interface InteractionContext<P>

Parameters:

propertyName - the property name

Returns:

the property value

readLine

public String readLine(String msg,
                       boolean echo)

Description copied from interface: InteractionContext

Display a message and read a line on the console. If no line can be read then null is returned.

Specified by:

readLine in interface InteractionContext<P>

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

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.

Specified by:

getWidth in interface ScreenContext<P>

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.

Specified by:

getHeight in interface ScreenContext<P>

Returns:

the term height

provide

public void provide(P element)
             throws IOException

Description copied from interface: Consumer

Provide an element.

Specified by:

provide in interface Consumer<P>

Parameters:

element - the provided element

Throws:

IOException

flush

public void flush()
           throws IOException

Specified by:

flush in interface Flushable

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Throws:

IOException

getSession

public Map<String,Object> getSession()

Description copied from interface: RuntimeContext

Returns the current session.

Specified by:

getSession in interface RuntimeContext

Returns:

the session map

getAttributes

public Map<String,Object> getAttributes()

Description copied from interface: RuntimeContext

Returns the current attributes.

Specified by:

getAttributes in interface RuntimeContext

Returns:

the attributes map

leftShift

public InvocationContextImpl<P> leftShift(Object o)
                                   throws IOException

Throws:

IOException