pnuts.ext
Class ConfigurationAdapter

java.lang.Object
  pnuts.lang.Configuration
      pnuts.ext.ConfigurationAdapter

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

LimitedClassesConfiguration, PublicMemberAccessor

public class ConfigurationAdapter
extends Configuration

See Also:

Serialized Form

Field Summary

protected Configuration

base

Fields inherited from class pnuts.lang.Configuration

_add, _add1, _and, _divide, _eq, _ge, _gt, _le, _lt, _mod, _multiply, _negate, _not, _or, _shiftArithmetic, _shiftLeft, _shiftRight, _subtract, _subtract1, _xor, normalConfiguration

Constructor Summary

ConfigurationAdapter()
Constructor

ConfigurationAdapter(Configuration base)
Constructor

Method Summary

java.lang.Object	callConstructor(Context context, java.lang.Class c, java.lang.Object[] args, java.lang.Class[] types) Call a constructor.
java.lang.Object	callMethod(Context context, java.lang.Class c, java.lang.String name, java.lang.Object[] args, java.lang.Class[] types, java.lang.Object target) Call a method.
java.util.Map	createMap(int size, Context context) Create a new Map object that corresponds to {key=>value} expression.
java.lang.String	formatObject(java.lang.Object target) String representation of an object
java.lang.reflect.Constructor[]	getConstructors(java.lang.Class cls) Get all public constructors of the specified class.
java.lang.Object	getElement(Context context, java.lang.Object target, java.lang.Object key) Gets an array element
java.lang.Object	getField(Context context, java.lang.Object target, java.lang.String name) Gets a field of the specified class.
java.lang.reflect.Method[]	getMethods(java.lang.Class cls) Get all public methods of the specified class.
Configuration	getParent() Returns the parent configuration
java.lang.Object	getRange(Context context, java.lang.Object target, java.lang.Object idx1, java.lang.Object idx2) Defines the semantices of an expression like:
java.lang.Object	getStaticField(Context context, java.lang.Class clazz, java.lang.String name) Get the value of a static field.
java.lang.Object	handleUndefinedSymbol(java.lang.String symbol, Context context) Handle an "not.defined" error This method can be redefined by a subclass so that a special value (e.g.
java.lang.Object	makeArray(java.lang.Object[] array, Context context) Return the value of an array expression.
void	putField(Context context, java.lang.Object target, java.lang.String name, java.lang.Object value) Sets a field of the specified class.
void	putStaticField(Context context, java.lang.Class clazz, java.lang.String name, java.lang.Object value) Sets a field of the specified class.
void	setElement(Context context, java.lang.Object target, java.lang.Object key, java.lang.Object value) Sets an array element
java.lang.Object	setRange(Context context, java.lang.Object target, java.lang.Object idx1, java.lang.Object idx2, java.lang.Object value) Defines the semantices of an expression like:
Callable	toCallable(java.lang.Object obj) Convert an object to Callable.
java.util.Enumeration	toEnumeration(java.lang.Object obj) Convert an object to Enumeration.

Methods inherited from class pnuts.lang.Configuration

createList, getDefault, getDefaultImports, getInitialClassLoader, initializeOperators, invokeMethod

Methods inherited from class java.lang.Object

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

Field Detail

base

protected Configuration base

Constructor Detail

ConfigurationAdapter

public ConfigurationAdapter()

Constructor

ConfigurationAdapter

public ConfigurationAdapter(Configuration base)

Constructor

Parameters:

base - the base configuration

Method Detail

getParent

public Configuration getParent()

Returns the parent configuration

getField

public java.lang.Object getField(Context context,
                                 java.lang.Object target,
                                 java.lang.String name)

Gets a field of the specified class.

Specified by:

getField in class Configuration

Parameters:

target - the target objecgt

name - the field name

context - the context in which the field is read

Returns:

the field value

putField

public void putField(Context context,
                     java.lang.Object target,
                     java.lang.String name,
                     java.lang.Object value)

Sets a field of the specified class.

Specified by:

putField in class Configuration

Parameters:

context - the context in which the field is written.

target - the target objecgt

name - the field name

value - the field value

getStaticField

public java.lang.Object getStaticField(Context context,
                                       java.lang.Class clazz,
                                       java.lang.String name)

Get the value of a static field.

Specified by:

getStaticField in class Configuration

Parameters:

context - the context in which the field is accessed

clazz - the class in which the static field is defined

name - the name of the static field

Returns:

the value

putStaticField

public void putStaticField(Context context,
                           java.lang.Class clazz,
                           java.lang.String name,
                           java.lang.Object value)

Sets a field of the specified class.

Specified by:

putStaticField in class Configuration

Parameters:

context - the context in which the field is written.

clazz - the class in which the static field is defined

name - the field name

value - the field value

callMethod

public java.lang.Object callMethod(Context context,
                                   java.lang.Class c,
                                   java.lang.String name,
                                   java.lang.Object[] args,
                                   java.lang.Class[] types,
                                   java.lang.Object target)

Call a method.

Specified by:

callMethod in class Configuration

Parameters:

context - the context

c - the class of the target object

name - the name of the method

args - the arguments

types - the type information of arguments

target - the target of the method call

Returns:

the methods return value

callConstructor

public java.lang.Object callConstructor(Context context,
                                        java.lang.Class c,
                                        java.lang.Object[] args,
                                        java.lang.Class[] types)

Call a constructor.

Specified by:

callConstructor in class Configuration

Parameters:

args - the arguments

context - the context

c - class of the constructor

types - type information of each arguments

Returns:

the newly created and initialized object

getElement

public java.lang.Object getElement(Context context,
                                   java.lang.Object target,
                                   java.lang.Object key)

Gets an array element

Specified by:

getElement in class Configuration

Parameters:

target - the target object (an array)

key - a key or an index of the element

context - the context

Returns:

the value of the element

setElement

public void setElement(Context context,
                       java.lang.Object target,
                       java.lang.Object key,
                       java.lang.Object value)

Sets an array element

Specified by:

setElement in class Configuration

Parameters:

target - the target object (an array)

key - a key or an index of the element

value - the new value of the element

context - the context

getMethods

public java.lang.reflect.Method[] getMethods(java.lang.Class cls)

Get all public methods of the specified class.

Specified by:

getMethods in class Configuration

Parameters:

cls - the class

Returns:

an array of Method objects

getConstructors

public java.lang.reflect.Constructor[] getConstructors(java.lang.Class cls)

Get all public constructors of the specified class.

Specified by:

getConstructors in class Configuration

Parameters:

cls - the class

Returns:

an array of Constructor objects

toEnumeration

public java.util.Enumeration toEnumeration(java.lang.Object obj)

Convert an object to Enumeration. This method is used by foreach statements. Subclasses can override this method to customize the behavior of foreach statements.

Specified by:

toEnumeration in class Configuration

toCallable

public Callable toCallable(java.lang.Object obj)

Convert an object to Callable. This method is used by call expression, e.g. obj(arg1, ...). Subclasses can override this method to register custom callable objects.

Specified by:

toCallable in class Configuration

handleUndefinedSymbol

public java.lang.Object handleUndefinedSymbol(java.lang.String symbol,
                                              Context context)

Handle an "not.defined" error This method can be redefined by a subclass so that a special value (e.g. null) is returned when undefined symbol is referenced.

Overrides:

handleUndefinedSymbol in class Configuration

Parameters:

symbol - the undefined symbol

context - the context in which the symbol is referenced

Returns:

the value to be returned

makeArray

public java.lang.Object makeArray(java.lang.Object[] array,
                                  Context context)

Return the value of an array expression. e.g. [a,b,c] {1,2,3} This method can be redefined by a subclass so that array expression returns different type of object, such as java.util.List.

Overrides:

makeArray in class Configuration

Parameters:

array - the elements in the array expression

context - the context

Returns:

the value of the array expression

createMap

public java.util.Map createMap(int size,
                               Context context)

Create a new Map object that corresponds to {key=>value} expression.

Overrides:

createMap in class Configuration

Parameters:

size - the map size

Returns:

a new Map object

formatObject

public java.lang.String formatObject(java.lang.Object target)

String representation of an object

Overrides:

formatObject in class Configuration

Parameters:

target - the target object to print

Returns:

the string representation of the target object

getRange

public java.lang.Object getRange(Context context,
                                 java.lang.Object target,
                                 java.lang.Object idx1,
                                 java.lang.Object idx2)

Defines the semantices of an expression like:

 
  target[idx1..idx2]
  
 

Specified by:

getRange in class Configuration

Parameters:

context - the context

target - the target object

idx1 - the start index

idx2 - the end index. null in idx2 means open-ended.

Returns:

the result

setRange

public java.lang.Object setRange(Context context,
                                 java.lang.Object target,
                                 java.lang.Object idx1,
                                 java.lang.Object idx2,
                                 java.lang.Object value)

Defines the semantices of an expression like:

 
  target[idx1..idx2] = value
  
 

Specified by:

setRange in class Configuration

Parameters:

context - the context in which the assignment is done

target - the target object

idx1 - the start index

idx2 - the end index. null in idx2 means open-ended.

value - the new value of the indexed element

Returns:

the result