com.plotnix.jex.javascript
Class JavaScriptExpression

java.lang.Object
  |
  +--com.plotnix.jex.javascript.JavaScriptExpression

Direct Known Subclasses:

JavaScriptIterationExpression, JavaScriptValueExpression, JavaScriptVariableExpression

public abstract class JavaScriptExpression

extends java.lang.Object

Version:

$Revision$ $Date$

Author:

Dmitri Plotnikov

Field Summary

static java.lang.String	JS_AUTODECLARE By default, Jex does not allow assignment to undeclared variables.
static java.lang.String	JS_GLOBAL_SCOPE_PROPERTY Jex stores the Global Scope for evaluation of JavaScript expressions in the root Jex Context as a property named JS_GLOBAL_SCOPE_PROPERTY
protected static java.lang.String	JS_PSEUDO_VARIABLE Name of the pseudo-variable used by JavaScriptVariableExpression to hold the value to be assigned.
static java.lang.String	JS_SCOPE_PROPERTY Jex stores the Local Scope for evaluation of JavaScript expressions in the current Jex Context as a property named JS_SCOPE_PROPERTY

Constructor Summary

JavaScriptExpression(org.mozilla.javascript.Script script)

Method Summary

protected org.mozilla.javascript.Scriptable	getContextScope(Context context, org.mozilla.javascript.Context jsContext) Creates a JavaScript scope for this JexContext.
protected org.mozilla.javascript.Scriptable	getGlobalScope(Context context, org.mozilla.javascript.Context jsContext) Creates a global JavaScript scope.
protected org.mozilla.javascript.Scriptable	getLocalScope(Context context, org.mozilla.javascript.Context jsContext, java.lang.Object[] arguments) Creates a new scope for the evaluation of an expression.
protected org.mozilla.javascript.Scriptable	getLocalScope(Context context, org.mozilla.javascript.Context jsContext, java.lang.Object[] arguments, java.lang.Object value) Creates a new scope for the evaluation of an expression.
org.mozilla.javascript.Script	getScript()

Methods inherited from class java.lang.Object

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

Field Detail

JS_GLOBAL_SCOPE_PROPERTY

public static final java.lang.String JS_GLOBAL_SCOPE_PROPERTY

Jex stores the Global Scope for evaluation of JavaScript expressions in the root Jex Context as a property named JS_GLOBAL_SCOPE_PROPERTY

JS_SCOPE_PROPERTY

public static final java.lang.String JS_SCOPE_PROPERTY

Jex stores the Local Scope for evaluation of JavaScript expressions in the current Jex Context as a property named JS_SCOPE_PROPERTY

JS_AUTODECLARE

public static final java.lang.String JS_AUTODECLARE

By default, Jex does not allow assignment to undeclared variables. To relax this restriction, define a property called JS_AUTODECLARE ("javascript.autodeclare") in the context that will host the new variables.

JS_PSEUDO_VARIABLE

protected static final java.lang.String JS_PSEUDO_VARIABLE

Name of the pseudo-variable used by JavaScriptVariableExpression to hold the value to be assigned.

Constructor Detail

JavaScriptExpression

public JavaScriptExpression(org.mozilla.javascript.Script script)

Parameters:

script - is a compiled JavaScript to be associated with this expression

Method Detail

getScript

public org.mozilla.javascript.Script getScript()

Returns:

the compiled JavaScript

getLocalScope

protected org.mozilla.javascript.Scriptable getLocalScope(Context context,
                                                          org.mozilla.javascript.Context jsContext,
                                                          java.lang.Object[] arguments)

Creates a new scope for the evaluation of an expression. Makes the new scope a child of the Scriptable associated with the Context.

Parameters:

context - is a Jex Context

jsContext - is a javascript context for this operation

arguments - should have the length of zero or one. The first argument of the array (or null) is used as the context bean.

Returns:

Local scope

getLocalScope

protected org.mozilla.javascript.Scriptable getLocalScope(Context context,
                                                          org.mozilla.javascript.Context jsContext,
                                                          java.lang.Object[] arguments,
                                                          java.lang.Object value)

Creates a new scope for the evaluation of an expression. Makes the new scope a child of the Scriptable associated with the Context. Declares a pseudo-variable in the new context that is used by JavaScriptVariableExpression as a holder for the value to be assigned.

Parameters:

context - is a Jex Context

jsContext - is a javascript context for this operation

arguments - should have the length of zero or one. The first argument of the array (or null) is used as the context bean.

value - is the value assigned to the pseudo-variable

Returns:

Local scope

getContextScope

protected org.mozilla.javascript.Scriptable getContextScope(Context context,
                                                            org.mozilla.javascript.Context jsContext)

Creates a JavaScript scope for this JexContext. Provides access to the context variables. Caches the JavaScript scope in the context itself.

Parameters:

context - is a Jex Context

jsContext - is a javascript context for this operation

Returns:

Context scope

getGlobalScope

protected org.mozilla.javascript.Scriptable getGlobalScope(Context context,
                                                           org.mozilla.javascript.Context jsContext)

Creates a global JavaScript scope. Caches the scope in the root Jex context.

Parameters:

context - is a Jex Context

jsContext - is a javascript context for this operation

Returns:

Global scope