content: /*
   * 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.examples.webapis;
  
  import com.google.auto.value.AutoValue;
  import java.io.Serializable;
  import java.util.Map;
  import org.apache.beam.sdk.schemas.AutoValueSchema;
  import org.apache.beam.sdk.schemas.annotations.DefaultSchema;
  import org.apache.beam.sdk.values.TypeDescriptor;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableMap;
  import org.apache.commons.compress.utils.FileNameUtils;
  
  // [START webapis_java_image_request]
  
  /** An HTTP request for an image. */
  @DefaultSchema(AutoValueSchema.class)
  @AutoValue
  abstract class ImageRequest implements Serializable {
  
    static final TypeDescriptor<ImageRequest> TYPE = TypeDescriptor.of(ImageRequest.class);
    private static final Map<String, String> EXT_MIMETYPE_MAP =
        ImmutableMap.of(
            "jpg", "image/jpeg",
            "jpeg", "image/jpeg",
            "png", "image/png");
  
    /** Derive the MIME type of the image from the url based on its extension. */
    private static String mimeTypeOf(String url) {
      String ext = FileNameUtils.getExtension(url);
      if (!EXT_MIMETYPE_MAP.containsKey(ext)) {
        throw new IllegalArgumentException(
            String.format("could not map extension to mimetype: ext %s of url: %s", ext, url));
      }
      return EXT_MIMETYPE_MAP.get(ext);
    }
  
    static Builder builder() {
      return new AutoValue_ImageRequest.Builder();
    }
  
    /** Build an {@link ImageRequest} from a {@param url}. */
    static ImageRequest of(String url) {
      return builder().setImageUrl(url).setMimeType(mimeTypeOf(url)).build();
    }
  
    /** The URL of the image request. */
    abstract String getImageUrl();
  
    /** The MIME type of the image request. */
    abstract String getMimeType();
  
    @AutoValue.Builder
    abstract static class Builder {
      abstract Builder setImageUrl(String value);
  
      abstract Builder setMimeType(String value);
  
      abstract ImageRequest build();
    }
  }
  
  // [END webapis_java_image_request]
  