| /* |
| * 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.cassandra.cql3.functions; |
| |
| import java.util.Collection; |
| |
| import com.google.common.collect.HashMultimap; |
| import com.google.common.collect.Multimap; |
| |
| import org.apache.cassandra.cql3.functions.masking.MaskingFcts; |
| |
| /** |
| * A container of native functions. It stores both pre-built function overloads ({@link NativeFunction}) and |
| * dynamic generators of functions ({@link FunctionFactory}). |
| */ |
| public class NativeFunctions |
| { |
| public static NativeFunctions instance = new NativeFunctions() |
| { |
| { |
| TokenFct.addFunctionsTo(this); |
| CastFcts.addFunctionsTo(this); |
| UuidFcts.addFunctionsTo(this); |
| TimeFcts.addFunctionsTo(this); |
| ToJsonFct.addFunctionsTo(this); |
| FromJsonFct.addFunctionsTo(this); |
| OperationFcts.addFunctionsTo(this); |
| AggregateFcts.addFunctionsTo(this); |
| CollectionFcts.addFunctionsTo(this); |
| BytesConversionFcts.addFunctionsTo(this); |
| MathFcts.addFunctionsTo(this); |
| MaskingFcts.addFunctionsTo(this); |
| } |
| }; |
| |
| /** Pre-built function overloads. */ |
| private final Multimap<FunctionName, NativeFunction> functions = HashMultimap.create(); |
| |
| /** Dynamic function factories. */ |
| private final Multimap<FunctionName, FunctionFactory> factories = HashMultimap.create(); |
| |
| public void add(NativeFunction function) |
| { |
| functions.put(function.name(), function); |
| NativeFunction legacyFunction = function.withLegacyName(); |
| if (legacyFunction != null) |
| functions.put(legacyFunction.name(), legacyFunction); |
| } |
| |
| public void addAll(NativeFunction... functions) |
| { |
| for (NativeFunction function : functions) |
| add(function); |
| } |
| |
| public void add(FunctionFactory factory) |
| { |
| factories.put(factory.name(), factory); |
| } |
| |
| /** |
| * Returns all the registered pre-built functions overloads with the specified name. |
| * |
| * @param name a function name |
| * @return the pre-built functions with the specified name |
| */ |
| public Collection<NativeFunction> getFunctions(FunctionName name) |
| { |
| return functions.get(name); |
| } |
| |
| /** |
| * @return all the registered pre-built functions. |
| */ |
| public Collection<NativeFunction> getFunctions() |
| { |
| return functions.values(); |
| } |
| |
| /** |
| * Returns all the registered functions factories with the specified name. |
| * |
| * @param name a function name |
| * @return the function factories with the specified name |
| */ |
| public Collection<FunctionFactory> getFactories(FunctionName name) |
| { |
| return factories.get(name); |
| } |
| |
| /** |
| * @return all the registered functions factories. |
| */ |
| public Collection<FunctionFactory> getFactories() |
| { |
| return factories.values(); |
| } |
| |
| /** |
| * Returns whether there is a function factory with the specified name. |
| * |
| * @param name a function name |
| * @return {@code true} if there is a factory with the specified name, {@code false} otherwise |
| */ |
| public boolean hasFactory(FunctionName name) |
| { |
| return factories.containsKey(name); |
| } |
| } |