gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/jsr223/SingleGremlinScriptEngineManager.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.apache.tinkerpop.gremlin.jsr223;

/**
 * Provides static access to a {@link CachedGremlinScriptEngineManager} instance.
 *
 * @author Stephen Mallette (http://stephen.genoprime.com)
 */
public final class SingleGremlinScriptEngineManager {
    private static final GremlinScriptEngineManager cached = new CachedGremlinScriptEngineManager();

    private SingleGremlinScriptEngineManager() {}

    public static GremlinScriptEngineManager instance(){
        return cached;
    }

    /**
     * Delegates calls to the {@link CachedGremlinScriptEngineManager} instance ensuring that the same instance
     * is returned for each {@code ScriptEngine} requested.
     */
    public static GremlinScriptEngine get(final String scriptEngineName) {
        return cached.getEngineByName(scriptEngineName);
    }
}