javax.script
Class SimpleScriptContext

java.lang.Object
  javax.script.SimpleScriptContext

All Implemented Interfaces:

ScriptContext

Direct Known Subclasses:

PhpScriptContext, PhpSimpleHttpScriptContext

public class SimpleScriptContext
extends java.lang.Object
implements ScriptContext

The GenericScriptContext is a simple implementation of ScriptContext.

Author:

Nandika Jayawardana , Sanka Samaranayake

Field Summary

Fields inherited from interface javax.script.ScriptContext

ENGINE_SCOPE, GLOBAL_SCOPE

Constructor Summary

SimpleScriptContext()

Method Summary

java.lang.Object	getAttribute(java.lang.String name) Retrieves the value for getAttribute(String, int) for the lowest scope in which it returns a non-null value.
java.lang.Object	getAttribute(java.lang.String name, int scope) Retrieves the value associated with specified name in the specified level of scope.
int	getAttributesScope(java.lang.String name) Retrieves the lowest value of scopes for which the attribute is defined.
Bindings	getBindings(int scope) Retrieves the Namespace instance associated with the specified level of scope.
java.io.Writer	getWriter() Retrieves an instance of java.io.Writer which can be used by scripts to display their output.
java.lang.Object	removeAttribute(java.lang.String name, int scope) Removes the specified attribute form the specified level of scope.
void	setAttribute(java.lang.String name, java.lang.Object value, int scope) Sets an attribute specified by the name in specified level of scope.
void	setBindings(Bindings namespace, int scope) Associates the specified namespace with specified level of scope.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleScriptContext

public SimpleScriptContext()

Method Detail

getAttribute

public java.lang.Object getAttribute(java.lang.String name)
                              throws java.lang.IllegalArgumentException

Retrieves the value for getAttribute(String, int) for the lowest scope in which it returns a non-null value.

Specified by:

getAttribute in interface ScriptContext

Parameters:

name - the name of the attribute

Returns:

the value of the attribute

Throws:

java.lang.IllegalArgumentException - if the name is null

getAttribute

public java.lang.Object getAttribute(java.lang.String name,
                                     int scope)
                              throws java.lang.IllegalArgumentException

Retrieves the value associated with specified name in the specified level of scope. Returns null if no value is associated with specified key in specified level of scope.

Specified by:

getAttribute in interface ScriptContext

Parameters:

name - the name of the attribute

scope - the level of scope

Returns:

the value value associated with the specified name in specified level of scope

Throws:

java.lang.IllegalArgumentException - if the name is null or the scope is invalid

getAttributesScope

public int getAttributesScope(java.lang.String name)

Retrieves the lowest value of scopes for which the attribute is defined. If there is no associate scope with the given attribute (-1) is returned.

Specified by:

getAttributesScope in interface ScriptContext

Parameters:

name - the name of attribute

Returns:

the value of level of scope

getBindings

public Bindings getBindings(int scope)

Retrieves the Namespace instance associated with the specified level of scope.

Specified by:

getBindings in interface ScriptContext

Parameters:

scope - the level of the scope

Returns:

the namespace associated with the specified level of scope

getWriter

public java.io.Writer getWriter()

Retrieves an instance of java.io.Writer which can be used by scripts to display their output.

Specified by:

getWriter in interface ScriptContext

Returns:

an instance of java.io.Writer

removeAttribute

public java.lang.Object removeAttribute(java.lang.String name,
                                        int scope)
                                 throws java.lang.IllegalArgumentException

Removes the specified attribute form the specified level of scope.

Specified by:

removeAttribute in interface ScriptContext

Parameters:

name - the name of the attribute

scope - the level of scope

Returns:

value which is removed

Throws:

java.lang.IllegalArgumentException

setAttribute

public void setAttribute(java.lang.String name,
                         java.lang.Object value,
                         int scope)
                  throws java.lang.IllegalArgumentException

Sets an attribute specified by the name in specified level of scope.

Specified by:

setAttribute in interface ScriptContext

Parameters:

name - the name of the attribute

value - the value of the attribute

scope - the level of the scope

Throws:

IllegalArguementException - if the name is null scope is invalid

java.lang.IllegalArgumentException - if the name is null or the scope is invalid

setBindings

public void setBindings(Bindings namespace,
                        int scope)
                 throws java.lang.IllegalArgumentException

Associates the specified namespace with specified level of scope.

Specified by:

setBindings in interface ScriptContext

Parameters:

namespace - the namespace to be associated with specified level of scope

scope - the level of scope

Throws:

java.lang.IllegalArgumentException - if the scope is invalid