org.norther.tammi.core.scripter.lang
Class AbstractInterpreter

java.lang.Object
  org.norther.tammi.core.scripter.lang.AbstractEngine
      org.norther.tammi.core.scripter.lang.AbstractInterpreter

All Implemented Interfaces:

PropertyChangeListener, EventListener, org.apache.bsf.BSFEngine, Interpreter, ScriptEngine

Direct Known Subclasses:

DJavaEngine, GroovyEngine

public abstract class AbstractInterpreter
extends AbstractEngine
implements Interpreter

An abstract interpreter adapter for BSF engines.

Version:

$Id: AbstractInterpreter.java,v 1.6 2009/09/28 15:08:46 cvsimp Exp $

Author:

Ilkka Priha

Field Summary

Fields inherited from interface org.norther.tammi.core.scripter.lang.Interpreter

JAVA_LANGUAGE

Fields inherited from interface org.norther.tammi.core.scripter.lang.ScriptEngine

APPLY, ARGUMENTS, EVALUATE, EXECUTE, MAIN

Constructor Summary

AbstractInterpreter()
Constructs a new interpreter.

Method Summary

void	addClassPath(String path) Adds a class search path.
void	addClassURL(URL url) Adds a class search URL.
Class<?>	defineClass(String name, byte[] code) Converts an array of bytes into a class.
void	defineVariable(String name, Object value) Defines a variable in the interpreter environment.
void	defineVariable(String name, Object value, Class<?> c) Defines a variable of the specified class.
ClassLoader	getClassLoader() Gets the class loader.
Set<String>	getClassNames() Gets the defined class names.
protected abstract Interpreter	getInterpreter() Gets the adapted interpreter.
Object	getVariable(String name) Gets the value of a variable.
Class<?>	getVariableClass(String name) Gets the class of a variable.
Set<String>	getVariableNames() Gets the defined variable names.
Object	interpret(File file) Interprets a file.
Object	interpret(InputStream in, String fname) Interprets an input stream.
Object	interpret(Reader r, String fname) Interprets a reader.
Object	interpret(String s, String fname) Interprets a string.
Object	interpret(URL url) Interprets a URL.
boolean	isDefined(String name) Checks whether a variable is defined.
Class<?>	loadClass(String name) Loads an interpreted class.
void	reset() Resets this interpreter.
void	setVariable(String name, Object value) Sets the value of a variable.

Methods inherited from class org.norther.tammi.core.scripter.lang.AbstractEngine

compileApply, compileExpr, compileScript, exec, getClassPath, getDeclaredBeans, getInitializer, getLanguage, getTempDirectory, iexec, initialize, isInitialized, propertyChange, reinitialize, setClassLoader, setClassPath, setInitializer, setTempDirectory, terminate

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.bsf.BSFEngine

apply, call, declareBean, eval, undeclareBean

Constructor Detail

AbstractInterpreter

public AbstractInterpreter()

Constructs a new interpreter.

Method Detail

interpret

public Object interpret(String s,
                        String fname)

Description copied from interface: Interpreter

Interprets a string.

Specified by:

interpret in interface Interpreter

Parameters:

s - the string from which the statements are read.

fname - the name of the parsed string.

Returns:

the result of the evaluation of the last statement.

interpret

public Object interpret(InputStream in,
                        String fname)

Description copied from interface: Interpreter

Interprets an input stream.

Specified by:

interpret in interface Interpreter

Parameters:

in - the input stream from which the statements are read.

fname - the name of the parsed stream.

Returns:

the result of the evaluation of the last statement.

interpret

public Object interpret(Reader r,
                        String fname)

Description copied from interface: Interpreter

Interprets a reader.

Specified by:

interpret in interface Interpreter

Parameters:

r - the reader.

fname - the name of the parsed stream.

Returns:

the result of the evaluation of the last statement.

interpret

public Object interpret(File file)
                 throws IOException

Description copied from interface: Interpreter

Interprets a file.

Specified by:

interpret in interface Interpreter

Parameters:

file - the file to interpret.

Returns:

the result of the evaluation of the last statement.

Throws:

IOException - on I/O errors.

interpret

public Object interpret(URL url)
                 throws IOException

Description copied from interface: Interpreter

Interprets a URL.

Specified by:

interpret in interface Interpreter

Parameters:

url - the url to interpret.

Returns:

the result of the evaluation of the last statement.

Throws:

IOException - on I/O errors.

defineVariable

public void defineVariable(String name,
                           Object value)

Description copied from interface: Interpreter

Defines a variable in the interpreter environment.

Specified by:

defineVariable in interface Interpreter

Parameters:

name - the variable's name.

value - the initial value of the variable.

defineVariable

public void defineVariable(String name,
                           Object value,
                           Class<?> c)

Description copied from interface: Interpreter

Defines a variable of the specified class.

Specified by:

defineVariable in interface Interpreter

Parameters:

name - the name.

value - the value.

c - the class.

isDefined

public boolean isDefined(String name)

Description copied from interface: Interpreter

Checks whether a variable is defined.

Specified by:

isDefined in interface Interpreter

Parameters:

name - the name.

Returns:

true if defined, false otherwise.

getVariable

public Object getVariable(String name)

Description copied from interface: Interpreter

Gets the value of a variable.

Specified by:

getVariable in interface Interpreter

Parameters:

name - the variable name.

Returns:

the variable value.

setVariable

public void setVariable(String name,
                        Object value)

Description copied from interface: Interpreter

Sets the value of a variable.

Specified by:

setVariable in interface Interpreter

Parameters:

name - the variable name.

value - the value of the variable.

getVariableClass

public Class<?> getVariableClass(String name)

Description copied from interface: Interpreter

Gets the class of a variable.

Specified by:

getVariableClass in interface Interpreter

Parameters:

name - the variable name.

Returns:

the variable class.

getVariableNames

public Set<String> getVariableNames()

Description copied from interface: Interpreter

Gets the defined variable names.

Specified by:

getVariableNames in interface Interpreter

Returns:

a set of strings.

addClassPath

public void addClassPath(String path)

Description copied from interface: Interpreter

Adds a class search path.

Specified by:

addClassPath in interface Interpreter

Parameters:

path - the path to add.

addClassURL

public void addClassURL(URL url)

Description copied from interface: Interpreter

Adds a class search URL.

Specified by:

addClassURL in interface Interpreter

Parameters:

url - the url to add.

loadClass

public Class<?> loadClass(String name)
                   throws ClassNotFoundException

Description copied from interface: Interpreter

Loads an interpreted class.

Specified by:

loadClass in interface Interpreter

Parameters:

name - the fully qualified name of the class to load.

Returns:

the loaded class.

Throws:

ClassNotFoundException - if the class cannot be find.

defineClass

public Class<?> defineClass(String name,
                            byte[] code)

Description copied from interface: Interpreter

Converts an array of bytes into a class.

Specified by:

defineClass in interface Interpreter

Parameters:

name - the fully qualified name of the class to load.

code - the byte code of the class.

Returns:

the defined class.

getClassNames

public Set<String> getClassNames()

Description copied from interface: Interpreter

Gets the defined class names.

Specified by:

getClassNames in interface Interpreter

Returns:

a set of strings.

getClassLoader

public ClassLoader getClassLoader()

Description copied from class: AbstractEngine

Gets the class loader.

Specified by:

getClassLoader in interface Interpreter

Overrides:

getClassLoader in class AbstractEngine

Returns:

the class loader.

reset

public void reset()

Description copied from interface: Interpreter

Resets this interpreter.

Specified by:

reset in interface Interpreter

getInterpreter

protected abstract Interpreter getInterpreter()

Gets the adapted interpreter.

Returns:

the interpreter.