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A safe sandbox to execute JavaScript code from Nashorn.

The newest version!

package delight.nashornsandbox.internal;

import javax.script.Bindings;
import javax.script.ScriptContext;
import javax.script.ScriptEngine;
import javax.script.ScriptException;

import static delight.nashornsandbox.internal.NashornSandboxImpl.LOG;

public class EvaluateOperation implements ScriptEngineOperation {

    private final String js;
    private final ScriptContext scriptContext;
    private final Bindings bindings;

    public String getJs() {
        return js;
    }

    public ScriptContext getScriptContext() {
        return scriptContext;
    }

    public Bindings getBindings() {
        return bindings;
    }

    public EvaluateOperation(String js, ScriptContext scriptContext, Bindings bindings) {
        this.js = js;
        this.scriptContext = scriptContext;
        this.bindings = bindings;
    }

    @Override
    public Object executeScriptEngineOperation(ScriptEngine scriptEngine) throws ScriptException {
        if (LOG.isDebugEnabled()) {
            LOG.debug("--- Running JS ---");
            LOG.debug(js);
            LOG.debug("--- JS END ---");
        }
       
        if (bindings != null) {
            return scriptEngine.eval(js, bindings);
        } else if (scriptContext != null) {
            return scriptEngine.eval(js, scriptContext);
        } else {
            return scriptEngine.eval(js);
        }
    }
}