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jruby/src/org/jruby/ast/ClassVarNode.java at serializable_procs · MSNexploder/jruby · GitHub
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jruby
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/
ClassVarNode.java
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ClassVarNode.java
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/*
***** BEGIN LICENSE BLOCK *****
* Version: CPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Common Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/cpl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2002 Anders Bengtsson <ndrsbngtssn@yahoo.se>
* Copyright (C) 2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
* Copyright (C) 2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
* Copyright (C) 2004 Thomas E Enebo <enebo@acm.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the CPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the CPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package
org
.
jruby
.
ast
;
import
java
.
io
.
IOException
;
import
java
.
io
.
ObjectInput
;
import
java
.
io
.
ObjectOutput
;
import
java
.
util
.
List
;
import
org
.
jruby
.
MetaClass
;
import
org
.
jruby
.
Ruby
;
import
org
.
jruby
.
RubyModule
;
import
org
.
jruby
.
ast
.
types
.
INameNode
;
import
org
.
jruby
.
ast
.
visitor
.
NodeVisitor
;
import
org
.
jruby
.
evaluator
.
ASTInterpreter
;
import
org
.
jruby
.
lexer
.
yacc
.
ISourcePosition
;
import
org
.
jruby
.
runtime
.
Block
;
import
org
.
jruby
.
runtime
.
ThreadContext
;
import
org
.
jruby
.
runtime
.
builtin
.
IRubyObject
;
/**
* Access to a class variable.
*/
public
class
ClassVarNode
extends
Node
implements
INameNode
{
private
static
final
long
serialVersionUID
=
0L
;
private
String
name
;
public
ClassVarNode
() {
super
();
}
public
ClassVarNode
(
ISourcePosition
position
,
String
name
) {
super
(
position
);
this
.
name
=
name
;
}
public
NodeType
getNodeType
() {
return
NodeType
.
CLASSVARNODE
;
}
/**
* Accept for the visitor pattern.
* @param iVisitor the visitor
**/
public
Object
accept
(
NodeVisitor
iVisitor
) {
return
iVisitor
.
visitClassVarNode
(
this
);
}
/**
* Gets the name.
* @return Returns a String
*/
public
String
getName
() {
return
name
;
}
public
List
<
Node
>
childNodes
() {
return
EMPTY_LIST
;
}
public
void
setName
(
String
name
) {
this
.
name
=
name
;
}
@
Override
public
IRubyObject
interpret
(
Ruby
runtime
,
ThreadContext
context
,
IRubyObject
self
,
Block
aBlock
) {
RubyModule
rubyClass
=
ASTInterpreter
.
getClassVariableBase
(
context
,
runtime
);
if
(
rubyClass
==
null
)
rubyClass
=
self
.
getMetaClass
();
return
rubyClass
.
getClassVar
(
name
);
}
@
Override
public
String
definition
(
Ruby
runtime
,
ThreadContext
context
,
IRubyObject
self
,
Block
aBlock
) {
//RubyModule module = context.getRubyClass();
RubyModule
module
=
context
.
getCurrentScope
().
getStaticScope
().
getModule
();
if
(
module
==
null
&&
self
.
getMetaClass
().
fastIsClassVarDefined
(
name
)) {
return
"class variable"
;
}
else
if
(
module
.
fastIsClassVarDefined
(
name
)) {
return
"class variable"
;
}
IRubyObject
attached
=
module
.
isSingleton
() ? ((
MetaClass
)
module
).
getAttached
() :
null
;
if
(
attached
instanceof
RubyModule
&& ((
RubyModule
)
attached
).
fastIsClassVarDefined
(
name
)) {
return
"class variable"
;
}
return
null
;
}
public
void
writeExternal
(
ObjectOutput
out
)
throws
IOException
{
super
.
writeExternal
(
out
);
out
.
writeUTF
(
name
);
}
public
void
readExternal
(
ObjectInput
in
)
throws
IOException
,
ClassNotFoundException
{
super
.
readExternal
(
in
);
name
=
in
.
readUTF
();
}
}
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