Java Script Engine getStringOrExcept(ScriptEngine e, String vname)

Description

get String Or Except

License

Open Source License

Declaration

public static String getStringOrExcept(ScriptEngine e, String vname) 

Method Source Code

//package com.java2s;
/*//from  w  ww  .j  a  v a  2s. c o m
 * This file is part of jxpl.
 *
 * jxpl is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * jxpl is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with jxpl.  If not, see <http://www.gnu.org/licenses/>.
 */

import javax.script.ScriptEngine;

public class Main {
    public static String getStringOrExcept(ScriptEngine e, String vname) {
        Object r = e.get(vname);
        if (r == null || !(r instanceof String)) {
            throw new IllegalArgumentException("No variable named " + vname + " in script engine that is a String");
        }
        return (String) r;
    }
}

Related

1. getEngine()
2. getEngine(String engineName)
3. getScriptEngine()
4. getScriptEngine(final ClassLoader loader, final String... args)
5. getScriptEngineManager()
6. getVersionString(ScriptEngineFactory factory)
7. importClass(ScriptEngine e, Class pkg, Bindings... b)
8. isJsEngineAvailable(String engineName, Logger logger)
9. listGems(ScriptEngine jruby)