org.jruby.embed.jsr223.Utils Maven / Gradle / Ivy
/**
* **** 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) 2009-2011 Yoko Harada
*
* 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
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* the terms of any one of the CPL, the GPL or the LGPL.
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*/
package org.jruby.embed.jsr223;
import java.io.IOException;
import java.io.PrintStream;
import java.io.Writer;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import javax.script.Bindings;
import javax.script.ScriptContext;
import javax.script.ScriptEngine;
import org.jruby.Ruby;
import org.jruby.RubyGlobal.OutputGlobalVariable;
import org.jruby.RubyIO;
import org.jruby.embed.AttributeName;
import org.jruby.embed.LocalVariableBehavior;
import org.jruby.embed.ScriptingContainer;
import org.jruby.embed.io.WriterOutputStream;
import org.jruby.embed.variable.TransientLocalVariable;
import org.jruby.embed.variable.VariableInterceptor;
import org.jruby.util.io.BadDescriptorException;
/**
* A collection of JSR223 specific utility methods.
*
* @author Yoko Harada
*/
public class Utils {
/**
* Gets line number value from engine's attribute map.
*
* @param context ScriptContext to be used to the evaluation
* @return line number
*/
static int getLineNumber(ScriptContext context) {
Object obj = context.getAttribute(AttributeName.LINENUMBER.toString(), ScriptContext.ENGINE_SCOPE);
if (obj instanceof Integer) {
return (Integer)obj;
}
return 0;
}
/**
* Gets a receiver object from engine's attribute map.
*
* @param context ScriptContext to be used to the evaluation
* @return receiver object or null if the attribute doesn't exist
*/
static Object getReceiver(ScriptContext context) {
return context.getAttribute(AttributeName.RECEIVER.toString(), ScriptContext.ENGINE_SCOPE);
}
static String getFilename(ScriptContext context) {
Object filename = context.getAttribute(ScriptEngine.FILENAME);
return filename != null ? (String)filename : "