| /* |
| * 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; |
| |
| import javax.script.Bindings; |
| import javax.script.ScriptContext; |
| import java.util.function.Supplier; |
| |
| /** |
| * A customizer implementation that provides bindings to a {@link GremlinScriptEngine} in the |
| * {@code ScriptContext.GLOBAL_SCOPE}. |
| * |
| * @author Stephen Mallette (http://stephen.genoprime.com) |
| */ |
| public class LazyBindingsCustomizer implements BindingsCustomizer { |
| |
| private final Supplier<Bindings> bindingsSupplier; |
| private final int scope; |
| |
| /** |
| * Creates a new object with {@code ScriptContext.GLOBAL_SCOPE}. |
| */ |
| public LazyBindingsCustomizer(final Supplier<Bindings> bindingsSupplier) { |
| this(bindingsSupplier, ScriptContext.GLOBAL_SCOPE); |
| } |
| |
| /** |
| * Creates a new object with a specified scope. There really can't be anything other than a {@code GLOBAL_SCOPE} |
| * specification so this constructor isn't public at the moment. Assigning to {@code ENGINE_SCOPE} is useless |
| * because it is the nature of the {@code ScriptEngine} to override that scope with {@code Bindings} supplied at |
| * the time of execution. |
| */ |
| LazyBindingsCustomizer(final Supplier<Bindings> bindingsSupplier, final int scope) { |
| this.bindingsSupplier = bindingsSupplier; |
| this.scope = scope; |
| } |
| |
| @Override |
| public Bindings getBindings() { |
| return bindingsSupplier.get(); |
| } |
| |
| @Override |
| public int getScope() { |
| return scope; |
| } |
| } |