mobile/android/thirdparty/com/squareup/picasso/Downloader.java

changeset 0
6474c204b198
     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/mobile/android/thirdparty/com/squareup/picasso/Downloader.java	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,99 @@
     1.4 +/*
     1.5 + * Copyright (C) 2013 Square, Inc.
     1.6 + *
     1.7 + * Licensed under the Apache License, Version 2.0 (the "License");
     1.8 + * you may not use this file except in compliance with the License.
     1.9 + * You may obtain a copy of the License at
    1.10 + *
    1.11 + *      http://www.apache.org/licenses/LICENSE-2.0
    1.12 + *
    1.13 + * Unless required by applicable law or agreed to in writing, software
    1.14 + * distributed under the License is distributed on an "AS IS" BASIS,
    1.15 + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    1.16 + * See the License for the specific language governing permissions and
    1.17 + * limitations under the License.
    1.18 + */
    1.19 +package com.squareup.picasso;
    1.20 +
    1.21 +import android.graphics.Bitmap;
    1.22 +import android.net.Uri;
    1.23 +import java.io.IOException;
    1.24 +import java.io.InputStream;
    1.25 +
    1.26 +/** A mechanism to load images from external resources such as a disk cache and/or the internet. */
    1.27 +public interface Downloader {
    1.28 +  /**
    1.29 +   * Download the specified image {@code url} from the internet.
    1.30 +   *
    1.31 +   * @param uri Remote image URL.
    1.32 +   * @param localCacheOnly If {@code true} the URL should only be loaded if available in a local
    1.33 +   * disk cache.
    1.34 +   * @return {@link Response} containing either a {@link Bitmap} representation of the request or an
    1.35 +   * {@link InputStream} for the image data. {@code null} can be returned to indicate a problem
    1.36 +   * loading the bitmap.
    1.37 +   * @throws IOException if the requested URL cannot successfully be loaded.
    1.38 +   */
    1.39 +  Response load(Uri uri, boolean localCacheOnly) throws IOException;
    1.40 +
    1.41 +  /** Thrown for non-2XX responses. */
    1.42 +  class ResponseException extends IOException {
    1.43 +    public ResponseException(String message) {
    1.44 +      super(message);
    1.45 +    }
    1.46 +  }
    1.47 +
    1.48 +  /** Response stream or bitmap and info. */
    1.49 +  class Response {
    1.50 +    final InputStream stream;
    1.51 +    final Bitmap bitmap;
    1.52 +    final boolean cached;
    1.53 +
    1.54 +    /**
    1.55 +     * Response image and info.
    1.56 +     *
    1.57 +     * @param bitmap Image.
    1.58 +     * @param loadedFromCache {@code true} if the source of the image is from a local disk cache.
    1.59 +     */
    1.60 +    public Response(Bitmap bitmap, boolean loadedFromCache) {
    1.61 +      if (bitmap == null) {
    1.62 +        throw new IllegalArgumentException("Bitmap may not be null.");
    1.63 +      }
    1.64 +      this.stream = null;
    1.65 +      this.bitmap = bitmap;
    1.66 +      this.cached = loadedFromCache;
    1.67 +    }
    1.68 +
    1.69 +    /**
    1.70 +     * Response stream and info.
    1.71 +     *
    1.72 +     * @param stream Image data stream.
    1.73 +     * @param loadedFromCache {@code true} if the source of the stream is from a local disk cache.
    1.74 +     */
    1.75 +    public Response(InputStream stream, boolean loadedFromCache) {
    1.76 +      if (stream == null) {
    1.77 +        throw new IllegalArgumentException("Stream may not be null.");
    1.78 +      }
    1.79 +      this.stream = stream;
    1.80 +      this.bitmap = null;
    1.81 +      this.cached = loadedFromCache;
    1.82 +    }
    1.83 +
    1.84 +    /**
    1.85 +     * Input stream containing image data.
    1.86 +     * <p>
    1.87 +     * If this returns {@code null}, image data will be available via {@link #getBitmap()}.
    1.88 +     */
    1.89 +    public InputStream getInputStream() {
    1.90 +      return stream;
    1.91 +    }
    1.92 +
    1.93 +    /**
    1.94 +     * Bitmap representing the image.
    1.95 +     * <p>
    1.96 +     * If this returns {@code null}, image data will be available via {@link #getInputStream()}.
    1.97 +     */
    1.98 +    public Bitmap getBitmap() {
    1.99 +      return bitmap;
   1.100 +    }
   1.101 +  }
   1.102 +}

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