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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