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    BeanShell is a small, free, embeddable Java source interpreter with object scripting language features, written in Java. BeanShell dynamically executes standard Java syntax and extends it with common scripting conveniences such as loose types, commands, and method closures like those in Perl and JavaScript.

    The newest version!
    



    Map to the BeanShell Source
    

This is a rough guide to the BeanShell source code.  See comments in the
individual files for more information.

    


    Package Areas
    

      

    • bsh
	Primary bsh source package

    • bsh/util
	Optional bsh utilities

    • bsh/commands
	Bsh scripts and Java code which implement Bsh commands

    • bsh/lib
	Bsh support files

    


    The bsh package
    

Parse Tree Classes

      

    • BSH*.java

      
e.g. BSHAllocationExpression.java, 
	BSHAmbiguousName.java, BSHArguments.java

      

These are the abstract syntax tree nodes (subclasses of SimpleNode) -
the internally compiled form of a bsh script.  Instances of these nodes 
are created by the parser to represent the bsh syntax read from a script. 

      
The original class structure was created by JJTree but these files 	
are *not* automatically generated any longer.  They have been implemented 
with the real code that executes their syntax.

      

Most BSH nodes are referenced only through their eval() method which
causes them to evaluate any child nodes and execute their behavior,
returning an object to the caller.

      


    • SimpleNode.java
	Base class for BSH nodes.


    • ReturnControl.java
	Support for control flow of a return statement.

    

I/O support

      

    • CommandLineInputStream.java
	Basic support for command line input.

    • Console.java
	Support for starting a GUI console.

    • ConsoleInterface.java

    • File.java
	File I/O that works relative to the bsh notion of the working directory.

    • ExternalVars.java
	Interface for setting/getting variables on a bsh interpreter.

    

Exceptions

      

    • EvalError.java
	A problem occurred while parsing or running a bsh script.

    • InterpreterError.java
	A fatal internal error occurred.

    • TargetError.java
	The target of a bsh operation threw an exception which the script is
	allowed to handle.

    

Name Resolution Support

      

    • Name.java

    • NameSpace.java

    • ForBodyNameSpace.java

    

Object / Primitive Wrappers

      

    • Primitive.java
	Wraps a primitive numeric value, char, boolean, void, or null.

    • LHS.java
	Wraps the left hand side of an assignment

    

Reflection Support

      

    • Reflect.java

    • ReflectError.java

    


Bsh Scripted Object Support

      

    • This.java 
	The type of a bsh scripted object (a 'this' reference).

    • JThis.java
	For backwards compatability with jdk1.2. Adds explicit Swing support.

    • XThis.java
	Extended 'this' with support for the new jdk1.3 proxy mechanism.

    

Automatically Generated Files

    
The following files are automatically generated by JTree or JavaCC and should 
*not* be modified directly.

      

    • Interpreter.java
	This is the actual parser class.

    • ASCII_UCodeESC_CharStream.java

    • TokenMgrError.java

    • Token.java

    • ParseException.java

    • InterpreterConstants.java

    • InterpreterTokenManager.java

    • InterpreterTreeConstants.java

    • JJTInterpreterState.java

    • Node.java




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