org.apache.felix.gogo.runtime

Class CommandSessionImpl

java.lang.Object

org.apache.felix.gogo.runtime.CommandSessionImpl

All Implemented Interfaces:

CommandSession, Converter

public class CommandSessionImpl
extends Object
implements CommandSession, Converter

Field Summary

Fields

Modifier and Type	Field and Description
static String	COMMANDS
protected InputStream	in
protected PrintStream	out
static String	SESSION_CLOSED
protected Map<String,Object>	variables
static String	VARIABLES

Fields inherited from interface org.apache.felix.service.command.Converter

CONVERTER_CLASSES, INSPECT, LINE, PART

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	CommandSessionImpl(CommandProcessorImpl shell, InputStream in, PrintStream out, PrintStream err)

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Close this command session.
Object	convert(Class<?> desiredType, Object in) Convert an object to another type.
Object	execute(CharSequence commandline) Execute a program in this session.
Object	expr(CharSequence expr)
CharSequence	format(Object result, int inspect) Convert an object to string form (CharSequence).
CharSequence	format(Object target, int level, Converter escape) Convert an objet to a CharSequence object in the requested format.
Object	get(String name) Get the value of a variable.
PrintStream	getConsole() Return the PrintStream for the console.
InputStream	getKeyboard() Return the input stream that is the first of the pipeline.
void	put(String name, Object value) Set the value of a variable.

Methods inherited from class java.lang.Object

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

Field Detail

SESSION_CLOSED

public static final String SESSION_CLOSED

See Also:

Constant Field Values

VARIABLES

public static final String VARIABLES

See Also:

Constant Field Values

COMMANDS

public static final String COMMANDS

See Also:

Constant Field Values

in

protected InputStream in

out

protected PrintStream out

variables

protected final Map<String,Object> variables

Constructor Detail

CommandSessionImpl

protected CommandSessionImpl(CommandProcessorImpl shell,
                  InputStream in,
                  PrintStream out,
                  PrintStream err)

Method Detail

close

public void close()

Description copied from interface: CommandSession

Close this command session. After the session is closed, it will throw IllegalStateException when it is used.

Specified by:

close in interface CommandSession

execute

public Object execute(CharSequence commandline)
               throws Exception

Description copied from interface: CommandSession

Execute a program in this session.

Specified by:

execute in interface CommandSession

Returns:

the result of the execution

Throws:

Exception

getKeyboard

public InputStream getKeyboard()

Description copied from interface: CommandSession

Return the input stream that is the first of the pipeline. This stream is sometimes necessary to communicate directly to the end user. For example, a "less" or "more" command needs direct input from the keyboard to control the paging.

Specified by:

getKeyboard in interface CommandSession

Returns:

InpuStream used closest to the user or null if input is from a file.

get

public Object get(String name)

Description copied from interface: CommandSession

Get the value of a variable.

Specified by:

get in interface CommandSession

Returns:

put

public void put(String name,
       Object value)

Description copied from interface: CommandSession

Set the value of a variable.

Specified by:

put in interface CommandSession

Parameters:

name - Name of the variable.

value - Value of the variable

getConsole

public PrintStream getConsole()

Description copied from interface: CommandSession

Return the PrintStream for the console. This must always be the stream "closest" to the user. This stream can be used to post messages that bypass the piping. If the output is piped to a file, then the object returned must be null.

Specified by:

getConsole in interface CommandSession

Returns:

format

public CharSequence format(Object target,
                  int level,
                  Converter escape)
                    throws Exception

Description copied from interface: Converter

Convert an objet to a CharSequence object in the requested format. The format can be INSPECT, LINE, or PART. Other values must throw IllegalArgumentException.

Specified by:

format in interface Converter

Parameters:

target - The object to be converted to a String

level - One of INSPECT, LINE, or PART.

escape - Use this object to format sub ordinate objects.

Returns:

A printed object of potentially multiple lines

Throws:

Exception

convert

public Object convert(Class<?> desiredType,
             Object in)

Description copied from interface: CommandSession

Convert an object to another type.

Specified by:

convert in interface CommandSession

Specified by:

convert in interface Converter

Parameters:

desiredType - The type that the returned object can be assigned to

in - The object that must be converted

Returns:

An object that can be assigned to the desired type or null.

format

public CharSequence format(Object result,
                  int inspect)

Description copied from interface: CommandSession

Convert an object to string form (CharSequence). The level is defined in the Converter interface, it can be one of INSPECT, LINE, PART. This function always returns a non null value. As a last resort, toString is called on the Object.

Specified by:

format in interface CommandSession

Returns:

expr

public Object expr(CharSequence expr)