2 * Copyright (c) 2010-2022 Contributors to the openHAB project
4 * See the NOTICE file(s) distributed with this work for additional
7 * This program and the accompanying materials are made available under the
8 * terms of the Eclipse Public License 2.0 which is available at
9 * http://www.eclipse.org/legal/epl-2.0
11 * SPDX-License-Identifier: EPL-2.0
13 package org.openhab.automation.jrubyscripting.internal;
15 import java.util.HashMap;
16 import java.util.List;
19 import java.util.stream.Collectors;
20 import java.util.stream.Stream;
22 import javax.script.ScriptEngine;
23 import javax.script.ScriptException;
25 import org.eclipse.jdt.annotation.NonNullByDefault;
26 import org.eclipse.jdt.annotation.Nullable;
27 import org.openhab.core.automation.module.script.AbstractScriptEngineFactory;
28 import org.openhab.core.automation.module.script.ScriptEngineFactory;
29 import org.openhab.core.config.core.ConfigurableService;
30 import org.osgi.framework.Constants;
31 import org.osgi.service.component.annotations.Activate;
32 import org.osgi.service.component.annotations.Component;
33 import org.osgi.service.component.annotations.Modified;
36 * This is an implementation of a {@link ScriptEngineFactory} for Ruby.
38 * @author Brian O'Connell - Initial contribution
39 * @author Jimmy Tanagra - Add require injection
42 @Component(service = ScriptEngineFactory.class, configurationPid = "org.openhab.automation.jrubyscripting", property = Constants.SERVICE_PID
43 + "=org.openhab.automation.jrubyscripting")
44 @ConfigurableService(category = "automation", label = "JRuby Scripting", description_uri = "automation:jruby")
45 public class JRubyScriptEngineFactory extends AbstractScriptEngineFactory {
47 private final JRubyScriptEngineConfiguration configuration = new JRubyScriptEngineConfiguration();
49 // Filter out the File entry to prevent shadowing the Ruby File class which breaks Ruby in spectacularly
50 // difficult ways to debug.
51 private static final Set<String> FILTERED_PRESETS = Set.of("File", "Files", "Path", "Paths");
52 private static final Set<String> INSTANCE_PRESETS = Set.of();
54 private final javax.script.ScriptEngineFactory factory = new org.jruby.embed.jsr223.JRubyEngineFactory();
56 private final List<String> scriptTypes = Stream
57 .concat(factory.getExtensions().stream(), factory.getMimeTypes().stream())
58 .collect(Collectors.toUnmodifiableList());
60 // Adds @ in front of a set of variables so that Ruby recognizes them as instance variables
61 private static Map.Entry<String, Object> mapInstancePresets(Map.Entry<String, Object> entry) {
62 if (INSTANCE_PRESETS.contains(entry.getKey())) {
63 return Map.entry("@" + entry.getKey(), entry.getValue());
69 // Adds $ in front of a set of variables so that Ruby recognizes them as global variables
70 private static Map.Entry<String, Object> mapGlobalPresets(Map.Entry<String, Object> entry) {
71 if (Character.isLowerCase(entry.getKey().charAt(0)) && !(entry.getValue() instanceof Class)
72 && !(entry.getValue() instanceof Enum)) {
73 return Map.entry("$" + entry.getKey(), entry.getValue());
79 // The activate call activates the automation and sets its configuration
81 protected void activate(Map<String, Object> config) {
82 configuration.update(config, factory);
85 // The modified call updates configuration for the automation
87 protected void modified(Map<String, Object> config) {
88 configuration.update(config, factory);
92 public List<String> getScriptTypes() {
97 public void scopeValues(ScriptEngine scriptEngine, Map<String, Object> scopeValues) {
98 // Empty comments prevent the formatter from breaking up the correct streams chaining
99 logger.debug("Scope Values: {}", scopeValues);
100 Map<String, Object> filteredScopeValues = //
104 .filter(map -> !FILTERED_PRESETS.contains(map.getKey())) //
105 .map(JRubyScriptEngineFactory::mapInstancePresets) //
106 .map(JRubyScriptEngineFactory::mapGlobalPresets) //
107 .collect(Collectors.toMap(map -> map.getKey(), map -> map.getValue())); //
109 Map<Boolean, Map<String, Object>> partitionedMap = //
110 filteredScopeValues.entrySet() //
112 .collect(Collectors.partitioningBy(entry -> (entry.getValue() instanceof Class),
113 Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue)));
115 importClassesToRuby(scriptEngine, partitionedMap.getOrDefault(true, new HashMap<>()));
116 super.scopeValues(scriptEngine, partitionedMap.getOrDefault(false, new HashMap<>()));
118 // scopeValues is called twice. The first call only passed 'se'. The second call passed the rest of the
119 // presets, including 'ir'. We wait for the second call before running the require statements.
120 if (scopeValues.containsKey("ir")) {
121 configuration.injectRequire(scriptEngine);
125 private void importClassesToRuby(ScriptEngine scriptEngine, Map<String, Object> objects) {
126 String import_statements = objects.entrySet() //
128 .map(entry -> "java_import " + ((Class<?>) entry.getValue()).getName() + " rescue nil") //
129 .collect(Collectors.joining("\n"));
131 scriptEngine.eval(import_statements);
132 } catch (ScriptException e) {
133 logger.debug("Error importing java classes", e);
138 public @Nullable ScriptEngine createScriptEngine(String scriptType) {
139 return scriptTypes.contains(scriptType) ? configuration.configureRubyEnvironment(factory.getScriptEngine())