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Merge pull request #1194 from GoogleCloudPlatform/translate-alpha
Add support for Google Translate
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220 changes: 220 additions & 0 deletions
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gcloud-java-examples/src/main/java/com/google/cloud/examples/translate/TranslateExample.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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| package com.google.cloud.examples.translate; | ||
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| import com.google.cloud.translate.Detection; | ||
| import com.google.cloud.translate.Language; | ||
| import com.google.cloud.translate.Translate; | ||
| import com.google.cloud.translate.TranslateOptions; | ||
| import com.google.cloud.translate.Translation; | ||
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| import java.util.Arrays; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
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| /** | ||
| * An example of using Google Translate. | ||
| * | ||
| * <p>This example demonstrates a simple/typical Translate usage. | ||
| * | ||
| * <p>See the | ||
| * <a href="https://github.com/GoogleCloudPlatform/gcloud-java/blob/master/gcloud-java-examples/README.md"> | ||
| * README</a> for compilation instructions. Run this code with | ||
| * <pre>{@code target/appassembler/bin/TranslateExample | ||
| * -Dexec.args="<apiKey> [<targetLanguage>] | ||
| * list languages <languageCode>? | ||
| * detect <text>+ | ||
| * translate <text>+"}</pre> | ||
| * | ||
| * <p>The first parameter is an optional {@code targetLanguage}. If the target language is not | ||
| * supplied, {@code en} is used (see {@link TranslateOptions.Builder#targetLanguage(String)}). | ||
| */ | ||
| public class TranslateExample { | ||
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| private static final Map<String, TranslateAction> ACTIONS = new HashMap<>(); | ||
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| private abstract static class TranslateAction<T> { | ||
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| abstract void run(Translate translate, T arg) throws Exception; | ||
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| abstract T parse(String... args) throws Exception; | ||
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| protected String params() { | ||
| return ""; | ||
| } | ||
| } | ||
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| /** | ||
| * This class demonstrates how to list supported languages. | ||
| * | ||
| * @see <a href="https://cloud.google.com/translate/v2/discovering-supported-languages-with-rest"> | ||
| * Discovering Supported Languages</a> | ||
| */ | ||
| private static class ListLanguagesAction extends TranslateAction<Void> { | ||
| @Override | ||
| public void run(Translate translate, Void arg) { | ||
| List<Language> languages = translate.listSupportedLanguages(); | ||
| System.out.println("Supported languages:"); | ||
| for (Language language : languages) { | ||
| System.out.println(language); | ||
| } | ||
| } | ||
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| @Override | ||
| Void parse(String... args) throws Exception { | ||
| if (args.length == 0) { | ||
| return null; | ||
| } | ||
| throw new IllegalArgumentException("This action takes no arguments."); | ||
| } | ||
| } | ||
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| /** | ||
| * This class demonstrates how detect the language of some texts. | ||
| * | ||
| * @see <a href="https://cloud.google.com/translate/v2/detecting-language-with-rest">Detecting | ||
| * Language</a> | ||
| */ | ||
| private static class DetectLanguageAction extends TranslateAction<List<String>> { | ||
| @Override | ||
| public void run(Translate translate, List<String> texts) { | ||
| List<Detection> detections = translate.detect(texts); | ||
| if (texts.size() == 1) { | ||
| System.out.println("Detected language is:"); | ||
| } else { | ||
| System.out.println("Detected languages are:"); | ||
| } | ||
| for (Detection detection : detections) { | ||
| System.out.println(detection); | ||
| } | ||
| } | ||
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| @Override | ||
| List<String> parse(String... args) throws Exception { | ||
| if (args.length >= 1) { | ||
| return Arrays.asList(args); | ||
| } else { | ||
| throw new IllegalArgumentException("Missing required texts."); | ||
| } | ||
| } | ||
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| @Override | ||
| public String params() { | ||
| return "<text>+"; | ||
| } | ||
| } | ||
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| /** | ||
| * This class demonstrates how to translate some texts. | ||
| * | ||
| * @see <a href="https://cloud.google.com/translate/v2/translating-text-with-rest">Translating | ||
| * Text</a> | ||
| */ | ||
| private static class TranslateTextAction extends TranslateAction<List<String>> { | ||
| @Override | ||
| public void run(Translate translate, List<String> texts) { | ||
| List<Translation> translations = translate.translate(texts); | ||
| if (texts.size() == 1) { | ||
| System.out.println("Translation is:"); | ||
| } else { | ||
| System.out.println("Translations are:"); | ||
| } | ||
| for (Translation translation : translations) { | ||
| System.out.println(translation); | ||
| } | ||
| } | ||
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| @Override | ||
| List<String> parse(String... args) throws Exception { | ||
| if (args.length >= 1) { | ||
| return Arrays.asList(args); | ||
| } else { | ||
| throw new IllegalArgumentException("Missing required texts."); | ||
| } | ||
| } | ||
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| @Override | ||
| public String params() { | ||
| return "<text>+"; | ||
| } | ||
| } | ||
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| static { | ||
| ACTIONS.put("languages", new ListLanguagesAction()); | ||
| ACTIONS.put("detect", new DetectLanguageAction()); | ||
| ACTIONS.put("translate", new TranslateTextAction()); | ||
| } | ||
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| private static void printUsage() { | ||
| StringBuilder actionAndParams = new StringBuilder(); | ||
| for (Map.Entry<String, TranslateAction> entry : ACTIONS.entrySet()) { | ||
| actionAndParams.append(System.lineSeparator()).append('\t').append(entry.getKey()); | ||
| String param = entry.getValue().params(); | ||
| if (param != null && !param.isEmpty()) { | ||
| actionAndParams.append(' ').append(param); | ||
| } | ||
| } | ||
| System.out.printf("Usage: %s [<apiKey>] [<targetLanguage>] operation <args>*%s%n", | ||
| TranslateExample.class.getSimpleName(), actionAndParams); | ||
| } | ||
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| @SuppressWarnings("unchecked") | ||
| public static void main(String... args) throws Exception { | ||
| if (args.length < 1) { | ||
| System.out.println("Missing required action"); | ||
| printUsage(); | ||
| return; | ||
| } | ||
| TranslateOptions.Builder optionsBuilder = TranslateOptions.builder(); | ||
| TranslateAction action; | ||
| String actionName; | ||
| if (args.length >= 3 && !ACTIONS.containsKey(args[1])) { | ||
| optionsBuilder.apiKey(args[0]); | ||
| actionName = args[2]; | ||
| optionsBuilder.targetLanguage(args[1]); | ||
| args = Arrays.copyOfRange(args, 3, args.length); | ||
| } else if (args.length >= 2 && !ACTIONS.containsKey(args[0])) { | ||
| optionsBuilder.apiKey(args[0]); | ||
| actionName = args[1]; | ||
| args = Arrays.copyOfRange(args, 2, args.length); | ||
| } else { | ||
| actionName = args[0]; | ||
| args = Arrays.copyOfRange(args, 1, args.length); | ||
| } | ||
| action = ACTIONS.get(actionName); | ||
| if (action == null) { | ||
| System.out.println("Unrecognized action."); | ||
| printUsage(); | ||
| return; | ||
| } | ||
| Object arg; | ||
| try { | ||
| arg = action.parse(args); | ||
| } catch (IllegalArgumentException ex) { | ||
| System.out.printf("Invalid input for action '%s'. %s%n", actionName, ex.getMessage()); | ||
| System.out.printf("Expected: %s%n", action.params()); | ||
| return; | ||
| } catch (Exception ex) { | ||
| System.out.println("Failed to parse arguments."); | ||
| ex.printStackTrace(); | ||
| return; | ||
| } | ||
| Translate translate = optionsBuilder.build().service(); | ||
| action.run(translate, arg); | ||
| } | ||
| } |
54 changes: 54 additions & 0 deletions
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...rc/main/java/com/google/cloud/examples/translate/snippets/DetectLanguageAndTranslate.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| /* | ||
| * 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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| /* | ||
| * EDITING INSTRUCTIONS | ||
| * This file is referenced in READMEs and javadoc. Any change to this file should be reflected in | ||
| * the project's READMEs and package-info.java. | ||
| */ | ||
|
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| package com.google.cloud.examples.translate.snippets; | ||
|
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| import com.google.cloud.translate.Detection; | ||
| import com.google.cloud.translate.Translate; | ||
| import com.google.cloud.translate.Translate.TranslateOption; | ||
| import com.google.cloud.translate.TranslateOptions; | ||
| import com.google.cloud.translate.Translation; | ||
|
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| /** | ||
| * A snippet for Google Translate showing how to detect the language of some text and translate | ||
| * some other text. | ||
| */ | ||
| public class DetectLanguageAndTranslate { | ||
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| public static void main(String... args) { | ||
| // Create a service object | ||
| // API key is read from the GOOGLE_API_KEY environment variable | ||
| Translate translate = TranslateOptions.defaultInstance().service(); | ||
|
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| // Detect the language of some text | ||
| Detection detection = translate.detect("Hola"); | ||
| String detectedLanguage = detection.language(); | ||
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| // Translate some text | ||
| Translation translation = translate.translate( | ||
| "World", | ||
| TranslateOption.sourceLanguage("en"), | ||
| TranslateOption.targetLanguage(detectedLanguage)); | ||
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| System.out.printf("Hola %s%n", translation.translatedText()); | ||
| } | ||
| } |
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