org.crsh.command.pipeline
Class AbstractPipe<C,P,CONS extends CommandContext<? super P>>

java.lang.Object
  org.crsh.command.pipeline.AbstractPipe<C,P,CONS>

All Implemented Interfaces:

Closeable, Flushable, CommandContext<C>, RuntimeContext, Consumer<C>, Producer<P,CONS>, InteractionContext, ScreenContext

Direct Known Subclasses:

ConvertingPipe, ToChunkPipe

public abstract class AbstractPipe<C,P,CONS extends CommandContext<? super P>>
extends Object
implements Consumer<C>, Producer<P,CONS>, CommandContext<C>

Author:

Julien Viet

Field Summary

protected CONS	consumer .
protected boolean	piped .

Constructor Summary

AbstractPipe(boolean piped)

Method Summary

void	close() Close the producer.
void	flush()
Map<String,Object>	getAttributes() Returns the current attributes.
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.
boolean	isPiped()
void	open(CONS consumer) Open the producer with the specified consumer.
String	readLine(String msg, boolean echo) Display a message and read a line on the console.
boolean	releaseAlternateBuffer() Release control of the alternate buffer.
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

Methods inherited from interface org.crsh.io.Producer

getProducedType

Methods inherited from interface org.crsh.io.Consumer

getConsumedType, provide

Methods inherited from interface org.crsh.shell.ScreenContext

write

Field Detail

piped

protected final boolean piped

.

consumer

protected CONS extends CommandContext<? super P> consumer

.

Constructor Detail

AbstractPipe

public AbstractPipe(boolean piped)

Method Detail

isPiped

public boolean isPiped()

Specified by:

isPiped in interface CommandContext<C>

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

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

Returns:

true if the usual buffer is shown

Throws:

IOException

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

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

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

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

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

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

Returns:

the term height

open

public void open(CONS consumer)

Description copied from interface: Producer

Open the producer with the specified consumer.

Specified by:

open in interface Producer<P,CONS extends CommandContext<? super P>>

Parameters:

consumer - the consumer

flush

public void flush()
           throws IOException

Specified by:

flush in interface Flushable

Throws:

IOException

close

public void close()
           throws IOException

Description copied from interface: Producer

Close the producer.

Specified by:

close in interface Closeable

Specified by:

close in interface Producer<P,CONS extends CommandContext<? super P>>

Throws:

IOException - any io exception