| /* |
| * 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.samza.sql.client.impl; |
| |
| import com.google.common.base.Joiner; |
| import org.apache.samza.sql.client.interfaces.SqlFunction; |
| |
| import java.util.List; |
| import java.util.stream.Collectors; |
| import org.apache.samza.sql.schema.SqlFieldSchema; |
| |
| |
| /** |
| * UDF information displayer |
| */ |
| public class SamzaSqlUdfDisplayInfo implements SqlFunction { |
| |
| private String name; |
| |
| private String description; |
| |
| private List<SqlFieldSchema> argumentTypes; |
| |
| private SqlFieldSchema returnType; |
| |
| public SamzaSqlUdfDisplayInfo(String name, String description, List<SqlFieldSchema> argumentTypes, |
| SqlFieldSchema returnType) { |
| this.name = name; |
| this.description = description; |
| this.argumentTypes = argumentTypes; |
| this.returnType = returnType; |
| } |
| |
| public String getName() { |
| return name; |
| } |
| |
| public String getDescription() { |
| return description; |
| } |
| |
| public List<String> getArgumentTypes() { |
| return argumentTypes.stream().map(x -> x.getFieldType().toString()).collect(Collectors.toList()); |
| } |
| |
| public String getReturnType() { |
| return returnType.getFieldType().toString(); |
| } |
| |
| public String toString() { |
| List<String> argumentTypeNames = |
| argumentTypes.stream().map(x -> x.getFieldType().toString()).collect(Collectors.toList()); |
| String args = Joiner.on(", ").join(argumentTypeNames); |
| return String.format("%s(%s) returns <%s> : %s", name, args, returnType.getFieldType().toString(), description); |
| } |
| } |