com.tinkerpop.gremlin.groovy.jsr223.ScriptExecutor Maven / Gradle / Ivy

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package com.tinkerpop.gremlin.groovy.jsr223;

import javax.script.Bindings;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;
import java.util.Arrays;
import java.util.List;

/**
 * Executes a Gremlin script from the command line.
 *
 * @author Pavel A. Yaskevich
 * @author Marko A. Rodriguez (http://markorodriguez.com)
 * @author Stephen Mallette (http://stephen.genoprime.com)
 */
public class ScriptExecutor {
    public static void main(final String[] arguments) throws IOException {
        if (arguments.length == 0) {
            System.out.println("Usage:    ...");
        } else {
            evaluate(new FileReader(arguments[0]), Arrays.asList(arguments).subList(1, arguments.length));
        }
    }

    protected static void evaluate(final Reader reader, final List arguments) {
        final GremlinGroovyScriptEngine engine = new GremlinGroovyScriptEngine();

        final Bindings bindings = engine.createBindings();
        bindings.put("args", arguments.toArray());

        try {
            engine.eval(reader, bindings);
        } catch (Exception e) {
            System.err.println(e.getMessage());
        }
    }
}