stevedlawrence commented on a change in pull request #273: WIP: Add User Defined Functions Capability URL: https://github.com/apache/incubator-daffodil/pull/273#discussion_r334913906
########## File path: daffodil-runtime1/src/main/scala/org/apache/daffodil/udf/UserDefinedFunctionService.scala ########## @@ -0,0 +1,185 @@ +/* + * 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.daffodil.udf + +import collection.JavaConverters._ +import collection.mutable._; +import java.util.ServiceLoader +import java.util.ServiceConfigurationError +import org.apache.daffodil.util.Misc +import java.io.Serializable +import org.apache.daffodil.util.LogLevel +import org.apache.daffodil.util.Logging +import java.lang.reflect.Method + +/** + * Loads all User Defined Function Providers on the classpath once and caches them in + * following look up tables that'll be used to look up the UDFs during Schema compile time. + * + * "$namespaceURI:$fName" -> classOf[UserDefinedFunction] + * "$namespaceURI:$fName" -> UserDefinedFunctionProvider + * + * It also does validation on the providers and classes and caches any warning and errors, + * which are then reported during compile time. + * + */ +object UserDefinedFunctionService extends Logging { + val evaluateMethodName = "evaluate" + type EvaluateMethod = Method + type ParameterTypes = Array[Class[_]] + type ReturnType = Class[_] + type UdfCallingInfo = (UserDefinedFunction, EvaluateMethod, ParameterTypes, ReturnType) + type NamespaceNameKey = String + private val functionClassesLookup: HashMap[NamespaceNameKey, Class[_]] = HashMap() + private val functionProviderLookup: HashMap[NamespaceNameKey, UserDefinedFunctionProvider] = HashMap() + private val InitializedUserDefinedFunctionsCache: HashMap[NamespaceNameKey, Option[UdfCallingInfo]] = HashMap() Review comment: lowercase Initialized. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
