Create Output as JSON Java sample (googleworkspace#71)

asrivas · Eric Koleda · commit 22f022f97049 · 2019-08-12T11:57:33.000-04:00
* Create Output as JSON Java sample

* Make OutputJSON runnable

* Add class level comment and region tags
diff --git a/docs/outputJSON/build.gradle b/docs/outputJSON/build.gradle
@@ -0,0 +1,18 @@
+apply plugin: 'java'
+apply plugin: 'application'
+
+mainClassName = 'OutputJSON'
+sourceCompatibility = 1.8
+targetCompatibility = 1.8
+version = '1.0'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    compile 'com.google.api-client:google-api-client:1.23.0'
+    compile 'com.google.oauth-client:google-oauth-client-jetty:1.23.0'
+    compile 'com.google.apis:google-api-services-docs:v1-rev20190128-1.28.0'
+    compile group: 'com.google.code.gson', name: 'gson', version: '2.3.1'
+}
diff --git a/docs/outputJSON/settings.gradle b/docs/outputJSON/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'outputJSON'
diff --git a/docs/outputJSON/src/main/java/OutputJSON.java b/docs/outputJSON/src/main/java/OutputJSON.java
@@ -0,0 +1,93 @@
+// Copyright 2018 Google LLC
+//
+// 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.
+
+import com.google.api.client.auth.oauth2.Credential;
+import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
+import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
+import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
+import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
+import com.google.api.client.http.javanet.NetHttpTransport;
+import com.google.api.client.json.JsonFactory;
+import com.google.api.client.json.jackson2.JacksonFactory;
+import com.google.api.client.util.store.FileDataStoreFactory;
+import com.google.api.services.docs.v1.Docs;
+import com.google.api.services.docs.v1.DocsScopes;
+import com.google.api.services.docs.v1.model.Document;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.security.GeneralSecurityException;
+import java.util.Collections;
+import java.util.List;
+
+// [START docs_output_json]
+/**
+ * OutputJSON prints the JSON representation of a Google Doc.
+ */
+public class OutputJSON {
+    private static final String APPLICATION_NAME = "Google Docs API Document Contents";
+    private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();
+    private static final String TOKENS_DIRECTORY_PATH = "tokens";
+    private static final String DOCUMENT_ID = "YOUR_DOCUMENT_ID";
+
+    /**
+     * Global instance of the scopes required by this sample. If modifying these scopes, delete
+     * your previously saved tokens/ folder.
+     */
+    private static final List<String> SCOPES =
+            Collections.singletonList(DocsScopes.DOCUMENTS_READONLY);
+
+    private static final String CREDENTIALS_FILE_PATH = "/credentials.json";
+
+    /**
+     * Creates an authorized Credential object.
+     *
+     * @param HTTP_TRANSPORT The network HTTP Transport.
+     * @return An authorized Credential object.
+     * @throws IOException If the credentials.json file cannot be found.
+     */
+    private static Credential getCredentials(final NetHttpTransport HTTP_TRANSPORT)
+            throws IOException {
+        // Load client secrets.
+        InputStream in = OutputJSON.class.getResourceAsStream(CREDENTIALS_FILE_PATH);
+        GoogleClientSecrets credentials =
+                GoogleClientSecrets.load(JSON_FACTORY, new InputStreamReader(in));
+
+        // Build flow and trigger user authorization request.
+        GoogleAuthorizationCodeFlow flow =
+                new GoogleAuthorizationCodeFlow.Builder(HTTP_TRANSPORT, JSON_FACTORY, credentials, SCOPES)
+                        .setDataStoreFactory(new FileDataStoreFactory(new java.io.File(TOKENS_DIRECTORY_PATH)))
+                        .setAccessType("offline")
+                        .build();
+        LocalServerReceiver receiver = new LocalServerReceiver.Builder().setPort(8888).build();
+        return new AuthorizationCodeInstalledApp(flow, receiver).authorize("user");
+    }
+
+    public static void main(String... args) throws IOException, GeneralSecurityException {
+        // Build a new authorized API client service.
+        final NetHttpTransport HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
+        Docs docsService =
+                new Docs.Builder(HTTP_TRANSPORT, JSON_FACTORY, getCredentials(HTTP_TRANSPORT))
+                        .setApplicationName(APPLICATION_NAME)
+                        .build();
+
+        Document response = docsService.documents().get(DOCUMENT_ID).execute();
+        Gson gson = new GsonBuilder().setPrettyPrinting().create();
+        System.out.println(gson.toJson(response));
+    }
+}
+// [END docs_output_json]
