cpcc.vvrte.services.js.JavascriptServiceImpl.java Source code

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Here is the source code for cpcc.vvrte.services.js.JavascriptServiceImpl.java

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// This code is part of the CPCC-NG project.
//
// Copyright (c) 2013 Clemens Krainer <clemens.krainer@gmail.com>
//
// This program 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 2 of the License, or
// (at your option) any later version.
//
// This program 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 this program; if not, write to the Free Software Foundation,
// Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

package cpcc.vvrte.services.js;

import java.io.IOException;
import java.util.HashSet;
import java.util.Set;
import java.util.UUID;

import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.tapestry5.ioc.ServiceResources;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.ContextFactory;
import org.mozilla.javascript.RhinoException;
import org.slf4j.Logger;

import cpcc.vvrte.entities.VirtualVehicle;

/**
 * JavascriptServiceImpl
 */
public class JavascriptServiceImpl implements JavascriptService {
    private Set<String> allowedClassesRegex = new HashSet<String>();

    private Logger logger;
    private ServiceResources serviceResources;

    /**
     * @param logger the application logger.
     * @param serviceResources the service resources.
     * @param functions the built-in functions to use.
     */
    public JavascriptServiceImpl(Logger logger, ServiceResources serviceResources, BuiltInFunctions functions) {
        this.logger = logger;
        this.serviceResources = serviceResources;

        VvRteFunctions.setVvRte(functions);
        // VvRteFunctions.setStdOut(System.out);

        try {
            if (!ContextFactory.hasExplicitGlobal()) {
                ContextFactory.initGlobal(new SandboxContextFactory());
            }
        } catch (IllegalStateException e) {
            logger.debug("ContextFactory already initialized");
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public JavascriptWorker createWorker(VirtualVehicle vehicle, boolean useContinuation) throws IOException {
        return new JavascriptWorker(vehicle, useContinuation, logger, serviceResources, allowedClassesRegex);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addAllowedClassRegex(String regex) {
        allowedClassesRegex.add(regex);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Object[] codeVerification(String script, int apiVersion) throws IOException {
        VirtualVehicle vehicle = new VirtualVehicle();
        vehicle.setId(123456789);
        vehicle.setCode(script);
        vehicle.setApiVersion(apiVersion);
        vehicle.setUuid(UUID.randomUUID().toString());

        JavascriptWorker w = new JavascriptWorker(vehicle, false, logger, serviceResources, allowedClassesRegex);

        String completedScript = StringUtils.defaultIfBlank(w.getScript(), "");

        Context cx = Context.enter();
        cx.setOptimizationLevel(-1);

        try {
            return cx.compileString(completedScript, "<check>", 1, null) != null ? ArrayUtils.EMPTY_OBJECT_ARRAY
                    : new Object[] { 0, 0, "Can not compile script!", "" };
        } catch (RhinoException e) {
            return new Object[] { e.columnNumber(), e.lineNumber() - w.getScriptStartLine(), e.details(),
                    e.lineSource() };
        } finally {
            Context.exit();
        }
    }
}