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RubyBinding.java
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RubyBinding.java
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/***** BEGIN LICENSE BLOCK *****
* Version: EPL 2.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Eclipse Public
* License Version 2.0 (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/epl-v20.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) 2001 Chad Fowler <chadfowler@chadfowler.com>
* Copyright (C) 2001 Alan Moore <alan_moore@gmx.net>
* Copyright (C) 2001-2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
* Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
* Copyright (C) 2002-2005 Thomas E Enebo <enebo@acm.org>
* Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
* Copyright (C) 2005 Charles O Nutter <headius@headius.com>
*
* 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 EPL, 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 EPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby;
import org.jruby.anno.JRubyClass;
import org.jruby.anno.JRubyMethod;
import org.jruby.ext.ripper.RubyLexer;
import org.jruby.runtime.Arity;
import org.jruby.runtime.Binding;
import org.jruby.runtime.Block;
import org.jruby.runtime.ClassIndex;
import org.jruby.runtime.DynamicScope;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.Visibility;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.util.TypeConverter;
import static org.jruby.util.RubyStringBuilder.str;
/**
* @author jpetersen
*/
@JRubyClass(name="Binding")
public class RubyBinding extends RubyObject {
private Binding binding;
public RubyBinding(Ruby runtime, RubyClass rubyClass, Binding binding) {
super(runtime, rubyClass);
this.binding = binding;
}
private RubyBinding(Ruby runtime, RubyClass rubyClass) {
super(runtime, rubyClass);
}
public static RubyClass createBindingClass(Ruby runtime) {
RubyClass bindingClass = runtime.defineClass("Binding", runtime.getObject(), RubyBinding::new);
bindingClass.setClassIndex(ClassIndex.BINDING);
bindingClass.setReifiedClass(RubyBinding.class);
bindingClass.defineAnnotatedMethods(RubyBinding.class);
bindingClass.getSingletonClass().undefineMethod("new");
return bindingClass;
}
public Binding getBinding() {
return binding;
}
// Proc class
public static RubyBinding newBinding(Ruby runtime, Binding binding) {
return new RubyBinding(runtime, runtime.getBinding(), binding);
}
@Deprecated
public static RubyBinding newBinding(Ruby runtime) {
return newBinding(runtime, runtime.getCurrentContext().currentBinding());
}
@Deprecated
public static RubyBinding newBinding(Ruby runtime, IRubyObject self) {
return newBinding(runtime, runtime.getCurrentContext().currentBinding(self));
}
@JRubyMethod(name = "initialize", visibility = Visibility.PRIVATE)
@Override
public IRubyObject initialize(ThreadContext context) {
binding = context.currentBinding();
return this;
}
@JRubyMethod
public IRubyObject dup(ThreadContext context) {
return newBinding(context.runtime, binding.dup(context));
}
@JRubyMethod(name = "initialize_copy", visibility = Visibility.PRIVATE)
@Override
public IRubyObject initialize_copy(IRubyObject other) {
RubyBinding otherBinding = (RubyBinding)other;
binding = otherBinding.binding.clone();
return this;
}
// c: bind_eval
@JRubyMethod(name = "eval", required = 1, optional = 2, checkArity = false)
public IRubyObject eval(ThreadContext context, IRubyObject[] args) {
int argc = Arity.checkArgumentCount(context, args, 1, 3);
IRubyObject[] newArgs = new IRubyObject[argc+1];
newArgs[0] = args[0]; // eval string
newArgs[1] = this; // binding
if (argc > 1) {
newArgs[2] = args[1]; // file
if (argc > 2) {
newArgs[3] = args[2]; // line
}
}
return RubyKernel.eval(context, this, newArgs, Block.NULL_BLOCK);
}
@JRubyMethod(name = "local_variable_defined?")
public IRubyObject local_variable_defined_p(ThreadContext context, IRubyObject symbol) {
String id = checkLocalId(context, symbol);
return RubyBoolean.newBoolean(context, binding.getEvalScope(context.runtime).getStaticScope().isDefined(id) != -1);
}
@JRubyMethod
public IRubyObject local_variable_get(ThreadContext context, IRubyObject symbol) {
String id = checkLocalId(context, symbol);
DynamicScope evalScope = binding.getEvalScope(context.runtime);
int slot = evalScope.getStaticScope().isDefined(id);
if (slot == -1) throw context.runtime.newNameError(str(context.runtime, "local variable `", symbol, "' not defined for " + inspect()), symbol);
return evalScope.getValueOrNil(slot & 0xffff, slot >> 16, context.nil);
}
@JRubyMethod
public IRubyObject local_variable_set(ThreadContext context, IRubyObject symbol, IRubyObject value) {
String id = checkLocalId(context, symbol);
DynamicScope evalScope = binding.getEvalScope(context.runtime);
int slot = evalScope.getStaticScope().isDefined(id);
if (slot == -1) { // Yay! New variable associated with this binding
slot = evalScope.getStaticScope().addVariable(id.intern());
evalScope.growIfNeeded();
}
return evalScope.setValue(slot & 0xffff, value, slot >> 16);
}
// MRI: check_local_id
private String checkLocalId(ThreadContext context, IRubyObject obj) {
String id = RubySymbol.checkID(obj);
if (!RubyLexer.isIdentifierChar(id.charAt(0))) {
throw context.runtime.newNameError(str(context.runtime, "wrong local variable name `", obj, "' for ", this), id);
}
return id;
}
@JRubyMethod
public IRubyObject local_variables(ThreadContext context) {
Ruby runtime = context.runtime;
return binding.getEvalScope(runtime).getStaticScope().getLocalVariables(runtime);
}
@JRubyMethod(name = "receiver")
public IRubyObject receiver(ThreadContext context) {
return binding.getSelf();
}
@JRubyMethod
public IRubyObject source_location(ThreadContext context) {
Ruby runtime = context.runtime;
IRubyObject filename = runtime.newString(binding.getFile()).freeze(context);
RubyFixnum line = runtime.newFixnum(binding.getLine() + 1); /* zero-based */
return runtime.newArray(filename, line);
}
}