/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.script;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
public class ScriptEngineRegistry {
private final Map<Class<? extends ScriptEngine>, String> registeredScriptEngineServices;
private final Map<String, ScriptEngine> registeredLanguages;
private final Map<String, Boolean> defaultInlineScriptEnableds;
public ScriptEngineRegistry(Iterable<ScriptEngine> registrations) {
Objects.requireNonNull(registrations);
Map<Class<? extends ScriptEngine>, String> registeredScriptEngineServices = new HashMap<>();
Map<String, ScriptEngine> registeredLanguages = new HashMap<>();
Map<String, Boolean> inlineScriptEnableds = new HashMap<>();
for (ScriptEngine service : registrations) {
String oldLanguage = registeredScriptEngineServices.putIfAbsent(service.getClass(),
service.getType());
if (oldLanguage != null) {
throw new IllegalArgumentException("script engine service [" + service.getClass() +
"] already registered for language [" + oldLanguage + "]");
}
String language = service.getType();
ScriptEngine scriptEngine =
registeredLanguages.putIfAbsent(language, service);
if (scriptEngine != null) {
throw new IllegalArgumentException("scripting language [" + language + "] already registered for script engine service [" +
scriptEngine.getClass().getCanonicalName() + "]");
}
inlineScriptEnableds.put(language, service.isInlineScriptEnabled());
}
this.registeredScriptEngineServices = Collections.unmodifiableMap(registeredScriptEngineServices);
this.registeredLanguages = Collections.unmodifiableMap(registeredLanguages);
this.defaultInlineScriptEnableds = Collections.unmodifiableMap(inlineScriptEnableds);
}
Iterable<Class<? extends ScriptEngine>> getRegisteredScriptEngineServices() {
return registeredScriptEngineServices.keySet();
}
String getLanguage(Class<? extends ScriptEngine> scriptEngineService) {
Objects.requireNonNull(scriptEngineService);
return registeredScriptEngineServices.get(scriptEngineService);
}
public Map<String, ScriptEngine> getRegisteredLanguages() {
return registeredLanguages;
}
public Map<String, Boolean> getDefaultInlineScriptEnableds() {
return this.defaultInlineScriptEnableds;
}
}