io.devcon5.misc.scripting.js.HelloWorldScripting.java Source code

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Here is the source code for io.devcon5.misc.scripting.js.HelloWorldScripting.java

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/*
 * Copyright 2015 DevCon5 GmbH, info@devcon5.io
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.devcon5.misc.scripting.js;

import javax.script.ScriptEngine;
import javax.script.ScriptException;
import java.io.IOException;
import java.io.InputStreamReader;

import jdk.nashorn.api.scripting.NashornScriptEngineFactory;

/**
 * This example shows how Nashorn engine is created with scripting mode enabled. The scripting mode
 * supports an expression syntax {@code ${expression}} inside strings that evalated.
 * Created by Gerald Mcke on 09.09.2015.
 */
public class HelloWorldScripting {

    public static void main(String... args) throws IOException, ScriptException {

        final NashornScriptEngineFactory factory = new NashornScriptEngineFactory();
        final ScriptEngine engine = factory.getScriptEngine(new String[] { "-scripting" });

        try (InputStreamReader reader = getScriptReader("/helloworld-scripting.js")) {
            engine.put("name", "Bob");
            engine.eval(reader);
        }
    }

    private static InputStreamReader getScriptReader(String scriptName) {

        return new InputStreamReader(HelloWorldScripting.class.getResourceAsStream(scriptName));
    }

}