samples: Add vision ocr set endpoint snippets (#1748)

vision/snippets/src/main/java/com/example/vision/SetEndpoint.java

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+/*
+ * Copyright 2019 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.
+ */
+
+package com.example.vision;
+
+import com.google.cloud.vision.v1.AnnotateImageRequest;
+import com.google.cloud.vision.v1.AnnotateImageResponse;
+import com.google.cloud.vision.v1.BatchAnnotateImagesResponse;
+import com.google.cloud.vision.v1.EntityAnnotation;
+import com.google.cloud.vision.v1.Feature;
+import com.google.cloud.vision.v1.Image;
+import com.google.cloud.vision.v1.ImageAnnotatorClient;
+import com.google.cloud.vision.v1.ImageAnnotatorSettings;
+import com.google.cloud.vision.v1.ImageSource;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+class SetEndpoint {
+
+  // Change your endpoint
+  static void setEndpoint() throws IOException {
+    // [START vision_set_endpoint]
+    ImageAnnotatorSettings settings =
+        ImageAnnotatorSettings.newBuilder().setEndpoint("eu-vision.googleapis.com:443").build();
+
+    // Initialize client that will be used to send requests. This client only needs to be created
+    // once, and can be reused for multiple requests. After completing all of your requests, call
+    // the "close" method on the client to safely clean up any remaining background resources.
+    ImageAnnotatorClient client = ImageAnnotatorClient.create(settings);
+    // [END vision_set_endpoint]
+
+    ImageSource imgSource =
+        ImageSource.newBuilder()
+            .setGcsImageUri("gs://cloud-samples-data/vision/text/screen.jpg")
+            .build();
+    Image image = Image.newBuilder().setSource(imgSource).build();
+    Feature feature = Feature.newBuilder().setType(Feature.Type.TEXT_DETECTION).build();
+    AnnotateImageRequest request =
+        AnnotateImageRequest.newBuilder().addFeatures(feature).setImage(image).build();
+    List<AnnotateImageRequest> requests = new ArrayList<>();
+    requests.add(request);
+
+    BatchAnnotateImagesResponse batchResponse = client.batchAnnotateImages(requests);
+
+    for (AnnotateImageResponse response : batchResponse.getResponsesList()) {
+      for (EntityAnnotation annotation : response.getTextAnnotationsList()) {
+        System.out.printf("Text: %s\n", annotation.getDescription());
+        System.out.println("Position:");
+        System.out.printf("%s\n", annotation.getBoundingPoly());
+      }
+    }
+    client.close();
+  }
+}

vision/snippets/src/test/java/com/example/vision/SetEndpointIT.java

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+/*
+ * Copyright 2019 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.
+ */
+
+package com.example.vision;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.PrintStream;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Tests for Vision Set Endpoint */
+@RunWith(JUnit4.class)
+@SuppressWarnings("checkstyle:abbreviationaswordinname")
+public class SetEndpointIT {
+
+  private ByteArrayOutputStream bout;
+  private PrintStream out;
+
+  @Before
+  public void setUp() {
+    bout = new ByteArrayOutputStream();
+    out = new PrintStream(bout);
+    System.setOut(out);
+  }
+
+  @After
+  public void tearDown() {
+    System.setOut(null);
+  }
+
+  @Test
+  public void testSetEndpoint() throws IOException {
+    // Act
+    SetEndpoint.setEndpoint();
+
+    // Assert
+    String got = bout.toString();
+    assertThat(got).contains("System Software Update");
+    assertThat(got).contains("x:");
+    assertThat(got).contains("y:");
+  }
+}