| /* |
| * 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.beam.sdk.extensions.sql; |
| |
| import org.apache.beam.sdk.schemas.Schema; |
| import org.apache.beam.sdk.testing.PAssert; |
| import org.apache.beam.sdk.testing.TestPipeline; |
| import org.apache.beam.sdk.transforms.Create; |
| import org.apache.beam.sdk.transforms.JsonToRow; |
| import org.apache.beam.sdk.values.PCollection; |
| import org.apache.beam.sdk.values.Row; |
| import org.junit.Rule; |
| import org.junit.Test; |
| |
| /** JsonToRowSqlTest. */ |
| public class JsonToRowSqlTest { |
| |
| @Rule public transient TestPipeline pipeline = TestPipeline.create(); |
| |
| @Test |
| public void testParsesRows() throws Exception { |
| Schema personSchema = |
| Schema.builder() |
| .addStringField("name") |
| .addInt32Field("height") |
| .addBooleanField("knowsJavascript") |
| .build(); |
| |
| PCollection<String> jsonPersons = |
| pipeline.apply( |
| Create.of( |
| jsonPerson("person1", "80", "true"), |
| jsonPerson("person2", "70", "false"), |
| jsonPerson("person3", "60", "true"), |
| jsonPerson("person4", "50", "false"), |
| jsonPerson("person5", "40", "true"))); |
| |
| Schema resultSchema = Schema.builder().addInt32Field("avg_height").build(); |
| |
| PCollection<Row> sqlResult = |
| jsonPersons |
| .apply(JsonToRow.withSchema(personSchema)) |
| .apply(SqlTransform.query("SELECT AVG(height) as avg_height FROM PCOLLECTION")); |
| |
| PAssert.that(sqlResult).containsInAnyOrder(row(resultSchema, 60)); |
| |
| pipeline.run(); |
| } |
| |
| private String jsonPerson(String name, String height, String knowsJs) { |
| return "{\n" |
| + " \"name\": \"" |
| + name |
| + "\",\n" |
| + " \"height\": " |
| + height |
| + ",\n" |
| + " \"knowsJavascript\": " |
| + knowsJs |
| + "\n" |
| + "}"; |
| } |
| |
| private Row row(Schema schema, Object... values) { |
| return Row.withSchema(schema).addValues(values).build(); |
| } |
| } |