it.uniroma3.plasm.core
Class Plasm

java.lang.Object
  it.uniroma3.plasm.core.Plasm

public class Plasm

extends java.lang.Object

Class encapsulating the Plasm Process.

Version:

$Id: Plasm.java,v 1.8 2004/07/27 06:57:01 giupo Exp $

Author:

giupo

Field Summary

static byte[]	EXIT EXIT command for Plasm
static java.lang.String	NAME
static byte[]	POSTFIX Postfix in the evaluation statement.
static byte[]	PREFIX Prefix in the evaluation statement (schema stuff...)

Method Summary

void	close() Ugly doodly doo, what this method is gonna do?
void	eval(java.lang.String code) AHCM (Another Hard comprehension method) this method evaluates the string passed as argument to the running plasm process NOTE: this method DOESN'T provide anysort of syntax evaluation...this is done from the underlying Plasm process.
static Plasm	getInstance() method to retrieve the actual instance in the JVM See the Singleton Pattern
java.lang.String	getPlasmPath()
java.io.InputStream	getPlasmStandardOutput()
boolean	isActive() Is this process active?
void	open() It opens, actually runs the plasm process and it connects the various streams to the crawling process.
void	setPlasmPath(java.lang.String plasmPath) Sets the plasm path NEEDED to run Plasm (as it takes it takes it as a parameter...)
void	setStreamListener(org.eclipse.debug.core.IStreamListener listener) Set a stream listener for this Plasm Process.

Methods inherited from class java.lang.Object

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

Field Detail

PREFIX

public static final byte[] PREFIX

Prefix in the evaluation statement (schema stuff...)

POSTFIX

public static final byte[] POSTFIX

Postfix in the evaluation statement. (Pretty dumb constant)

EXIT

public static final byte[] EXIT

EXIT command for Plasm

NAME

public static final java.lang.String NAME

See Also:

Constant Field Values

Method Detail

getInstance

public static Plasm getInstance()

method to retrieve the actual instance in the JVM See the Singleton Pattern

open

public void open()
          throws java.io.IOException

It opens, actually runs the plasm process and it connects the various streams to the crawling process.

Throws:

java.io.IOException - when it's impossible to communicate with the process.

close

public void close()
           throws java.io.IOException

Ugly doodly doo, what this method is gonna do?

Throws:

java.lang.IOException - when somethings goes wrong closing all the streams (because this is what this method does, if it's not straightforward to your eyes...

java.io.IOException

eval

public void eval(java.lang.String code)
          throws java.io.IOException

AHCM (Another Hard comprehension method) this method evaluates the string passed as argument to the running plasm process NOTE: this method DOESN'T provide anysort of syntax evaluation...this is done from the underlying Plasm process.

Parameters:

code - the string containing the Plasm statements

Throws:

java.io.IOException - when something odd (like broken communications) occurs.

isActive

public boolean isActive()

Is this process active?

Returns:

Returns the active.

getPlasmPath

public java.lang.String getPlasmPath()

Returns:

Returns the plasmPath.

setPlasmPath

public void setPlasmPath(java.lang.String plasmPath)

Sets the plasm path NEEDED to run Plasm (as it takes it takes it as a parameter...)

Parameters:

plasmPath - The plasmPath to set.

getPlasmStandardOutput

public java.io.InputStream getPlasmStandardOutput()

setStreamListener

public void setStreamListener(org.eclipse.debug.core.IStreamListener listener)
                       throws java.io.IOException

Set a stream listener for this Plasm Process. I can have only ONE listener

Parameters:

listener -

Throws:

java.io.IOException - Thrown if plasm is not active