| /* |
| * 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 javax.script.SimpleBindings; |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.function.Supplier; |
| |
| /** |
| * A plugin that allows {@code Bindings} to be applied to a {@link GremlinScriptEngine} at the time of creation. |
| * {@code Bindings} defined with this plugin will always be assigned as {@code ScriptContext.GLOBAL_SCOPE} and as such |
| * will be visible to all {@link GremlinScriptEngine} instances. |
| * <p/> |
| * Note that bindings are applied in the order in which the {@code BindingsGremlinPlugin} instances are added to the |
| * {@link GremlinScriptEngineManager}. Therefore if there are two plugins added and both include a variable called "x" |
| * then the value of "x" will be the equal to the value provided by the second plugin that overrides the first. |
| * <p/> |
| * This {@link GremlinPlugin} is not enabled for the {@code ServiceLoader}. It is designed to be instantiated manually. |
| * |
| * @author Stephen Mallette (http://stephen.genoprime.com) |
| */ |
| public class BindingsGremlinPlugin extends AbstractGremlinPlugin { |
| private static final String NAME = "tinkerpop.bindings"; |
| |
| private BindingsGremlinPlugin(final Builder builder) { |
| super(NAME, new DefaultBindingsCustomizer(builder.bindings)); |
| } |
| |
| BindingsGremlinPlugin(final Supplier<Bindings> bindingsSupplier) { |
| super(NAME, new LazyBindingsCustomizer(bindingsSupplier)); |
| } |
| |
| /** |
| * Builds a set of static bindings. |
| */ |
| public static BindingsGremlinPlugin.Builder build() { |
| return new Builder(); |
| } |
| |
| public static final class Builder { |
| |
| private Bindings bindings = new SimpleBindings(); |
| |
| private Builder() {} |
| |
| public Builder bindings(final Map<String, Object> bindings) { |
| this.bindings = new SimpleBindings(bindings); |
| return this; |
| } |
| |
| public BindingsGremlinPlugin create() { |
| return new BindingsGremlinPlugin(this); |
| } |
| } |
| } |