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org.scoja.server.core
Class LazyStackedEnvironment  

java.lang.Object
  org.scoja.server.core.LazyStackedEnvironment

All Implemented Interfaces:

Environment

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public class LazyStackedEnvironment

extends java.lang.Object

implements Environment

this implementation of Environment tries to make mark() 55 and release() 55 as cheap as possible. Consecutive mark() 55 executions, with no intervening calls to define(String,String) 55 , involve no object construction.

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Field Summary
protected  Environment	local
protected  int	localMarks
protected  java.util.HashMap	map
protected  int	marks

 

Fields inherited from interface org.scoja.server.core.Environment

Q_UNKNOWN, UNKNOWN

 

Constructor Summary

LazyStackedEnvironment()

 

Method Summary
void	define(java.lang.String var, QStr value)           Set a (new) value for variable var
void	define(java.lang.String var, java.lang.String value)           Set a (new) value for variable var
QStr	definition(java.lang.String var)           Return the value give to var; null if no var is undefined.
boolean	isDefined(java.lang.String var)
void	mark()           Put a mark.
void	release()           Make this enviroment to forget al modification after the last execution of mark() 55 .
java.lang.String	toString()           Convert this Object to a human-readable String.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

map

protected final java.util.HashMap map

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marks

protected int marks

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local

protected Environment local

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localMarks

protected int localMarks

Constructor Detail

LazyStackedEnvironment

public LazyStackedEnvironment()

Method Detail

mark

public void mark()

Description copied from interface: Environment

Put a mark. All modificatons (variables defined or redefined) after executing this operation will be forgotten after executing Environment.release() 55 .

Specified by:

mark in interface Environment

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release

public void release()

Description copied from interface: Environment

Make this enviroment to forget al modification after the last execution of Environment.mark() 55 .

Specified by:

release in interface Environment

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define

public void define(java.lang.String var,
                   java.lang.String value)

Description copied from interface: Environment

Set a (new) value for variable var

Specified by:

define in interface Environment

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define

public void define(java.lang.String var,
                   QStr value)

Description copied from interface: Environment

Set a (new) value for variable var

Specified by:

define in interface Environment

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isDefined

public boolean isDefined(java.lang.String var)

Specified by:

isDefined in interface Environment

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definition

public QStr definition(java.lang.String var)

Description copied from interface: Environment

Return the value give to var; null if no var is undefined.

Specified by:

definition in interface Environment

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toString

public java.lang.String toString()

Description copied from class: java.lang.Object

Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() 55 and such.

It is typical, but not required, to ensure that this method never completes abruptly with a java.lang.RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

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