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Merge pull request #1268 from mziccard/dataset-snippets
Add snippets for BigQuery Dataset class and tests
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...d-examples/src/main/java/com/google/cloud/examples/bigquery/snippets/DatasetSnippets.java
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| /* | ||
| * Copyright 2016 Google Inc. All Rights Reserved. | ||
| * | ||
| * Licensed 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. | ||
| */ | ||
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|
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| /* | ||
| * EDITING INSTRUCTIONS | ||
| * This file is referenced in Dataset’s javadoc. Any change to this file should be reflected in | ||
| * Dataset’s javadoc. | ||
| */ | ||
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| package com.google.cloud.examples.bigquery.snippets; | ||
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| import com.google.cloud.Page; | ||
| import com.google.cloud.bigquery.Dataset; | ||
| import com.google.cloud.bigquery.Dataset.Builder; | ||
| import com.google.cloud.bigquery.Field; | ||
| import com.google.cloud.bigquery.Field.Type; | ||
| import com.google.cloud.bigquery.Schema; | ||
| import com.google.cloud.bigquery.StandardTableDefinition; | ||
| import com.google.cloud.bigquery.Table; | ||
| import com.google.cloud.bigquery.TimePartitioning; | ||
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| import java.util.Iterator; | ||
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| /** | ||
| * This class contains a number of snippets for the {@link Dataset} interface. | ||
| */ | ||
| public class DatasetSnippets { | ||
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| private final Dataset dataset; | ||
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| public DatasetSnippets(Dataset dataset) { | ||
| this.dataset = dataset; | ||
| } | ||
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| /** | ||
| * Example of checking whether a dataset exists. | ||
| */ | ||
| // [TARGET exists()] | ||
| public boolean doesDatasetExist() { | ||
| // [START exists] | ||
| boolean exists = dataset.exists(); | ||
| if (exists) { | ||
| // the dataset exists | ||
| } else { | ||
| // the dataset was not found | ||
| } | ||
| // [END exists] | ||
| return exists; | ||
| } | ||
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| /** | ||
| * Example of reloading a dataset. | ||
| */ | ||
| // [TARGET reload(DatasetOption...)] | ||
| public Dataset reloadDataset() { | ||
| // [START reload] | ||
| Dataset latestDataset = dataset.reload(); | ||
| if (latestDataset == null) { | ||
| // The dataset was not found | ||
| } | ||
| // [END reload] | ||
| return latestDataset; | ||
| } | ||
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| /** | ||
| * Example of updating a dataset. | ||
| */ | ||
| // [TARGET update(DatasetOption...)] | ||
| // [VARIABLE "my_friendly_name"] | ||
| public Dataset updateDataset(String friendlyName) { | ||
| // [START update] | ||
| Builder builder = dataset.toBuilder(); | ||
| builder.friendlyName(friendlyName); | ||
| Dataset updatedDataset = builder.build().update(); | ||
| // [END update] | ||
| return updatedDataset; | ||
| } | ||
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| /** | ||
| * Example of deleting a dataset. | ||
| */ | ||
| // [TARGET delete(DatasetDeleteOption...)] | ||
| public boolean deleteDataset() { | ||
| // [START delete] | ||
| boolean deleted = dataset.delete(); | ||
| if (deleted) { | ||
| // The dataset was deleted | ||
| } else { | ||
| // The dataset was not found | ||
| } | ||
| // [END delete] | ||
| return deleted; | ||
| } | ||
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| /** | ||
| * Example of listing tables in the dataset. | ||
| */ | ||
| // [TARGET list(TableListOption...)] | ||
| public Page<Table> list() { | ||
| // [START list] | ||
| Page<Table> tables = dataset.list(); | ||
| Iterator<Table> tableIterator = tables.iterateAll(); | ||
| while (tableIterator.hasNext()) { | ||
| Table table = tableIterator.next(); | ||
| // do something with the table | ||
| } | ||
| // [END list] | ||
| return tables; | ||
| } | ||
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| /** | ||
| * Example of getting a table in the dataset. | ||
| */ | ||
| // [TARGET get(String, TableOption...)] | ||
| // [VARIABLE “my_table”] | ||
| public Table getTable(String tableName) { | ||
| // [START getTable] | ||
| Table table = dataset.get(tableName); | ||
| // [END getTable] | ||
| return table; | ||
| } | ||
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| /** | ||
| * Example of creating a table in the dataset with schema and time partitioning. | ||
| */ | ||
| // [TARGET create(String, TableDefinition, TableOption...)] | ||
| // [VARIABLE “my_table”] | ||
| // [VARIABLE “my_field”] | ||
| public Table createTable(String tableName, String fieldName) { | ||
| // [START createTable] | ||
| Schema schema = Schema.of(Field.of(fieldName, Type.string())); | ||
| StandardTableDefinition definition = StandardTableDefinition.builder() | ||
| .schema(schema) | ||
| .timePartitioning(TimePartitioning.of(TimePartitioning.Type.DAY)) | ||
| .build(); | ||
| Table table = dataset.create(tableName, definition); | ||
| // [END createTable] | ||
| return table; | ||
| } | ||
| } |
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