Add default signatures and cache strategies.

Work toward #174.

library/src/main/java/com/bumptech/glide/GenericRequestBuilder.java

@@ -82,6 +82,8 @@ public class GenericRequestBuilder<ModelType, DataType, ResourceType, TranscodeT
         this(other.context, other.model, loadProvider, transcodeClass, other.glide, other.requestTracker,
                 other.lifecycle);
         this.signature = other.signature;
+        this.diskCacheStrategy = other.diskCacheStrategy;
+        this.isCacheable = other.isCacheable;
     }
 
     GenericRequestBuilder(Context context, ModelType model,

library/src/main/java/com/bumptech/glide/Glide.java

@@ -30,6 +30,7 @@ import com.bumptech.glide.load.model.file_descriptor.FileDescriptorResourceLoade
 import com.bumptech.glide.load.model.file_descriptor.FileDescriptorStringLoader;
 import com.bumptech.glide.load.model.file_descriptor.FileDescriptorUriLoader;
 import com.bumptech.glide.load.model.stream.HttpUrlGlideUrlLoader;
+import com.bumptech.glide.load.model.stream.StreamByteArrayLoader;
 import com.bumptech.glide.load.model.stream.StreamFileLoader;
 import com.bumptech.glide.load.model.stream.StreamResourceLoader;
 import com.bumptech.glide.load.model.stream.StreamStringLoader;
@@ -217,6 +218,7 @@ public class Glide {
         register(Uri.class, InputStream.class, new StreamUriLoader.Factory());
         register(URL.class, InputStream.class, new StreamUrlLoader.Factory());
         register(GlideUrl.class, InputStream.class, new HttpUrlGlideUrlLoader.Factory());
+        register(byte[].class, InputStream.class, new StreamByteArrayLoader.Factory());
 
         transcoderRegistry.register(Bitmap.class, GlideBitmapDrawable.class,
                 new GlideBitmapDrawableTranscoder(context.getResources(), bitmapPool));

library/src/main/java/com/bumptech/glide/RequestManager.java

@@ -5,6 +5,10 @@ import android.net.Uri;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.ParcelFileDescriptor;
+import com.bumptech.glide.load.Key;
+import com.bumptech.glide.load.engine.DiskCacheStrategy;
+import com.bumptech.glide.signature.ApplicationVersionSignature;
+import com.bumptech.glide.signature.MediaStoreSignature;
 import com.bumptech.glide.load.model.ModelLoader;
 import com.bumptech.glide.load.model.file_descriptor.FileDescriptorModelLoader;
 import com.bumptech.glide.load.model.stream.MediaStoreStreamLoader;
@@ -15,6 +19,7 @@ import com.bumptech.glide.manager.ConnectivityMonitorFactory;
 import com.bumptech.glide.manager.Lifecycle;
 import com.bumptech.glide.manager.LifecycleListener;
 import com.bumptech.glide.manager.RequestTracker;
+import com.bumptech.glide.signature.StringSignature;
 import com.bumptech.glide.util.Util;
 
 import java.io.File;
@@ -283,8 +288,9 @@ public class RequestManager implements LifecycleListener {
      *      {@link android.provider.MediaStore.Images.ImageColumns#ORIENTATION}.
      */
     public DrawableTypeRequest<Uri> loadFromMediaStore(Uri uri, String mimeType, long dateModified, int orientation) {
-        // TODO: create a signature from the given arguments.
-        return loadFromMediaStore(uri);
+        Key signature = new MediaStoreSignature(mimeType, dateModified, orientation);
+        return (DrawableTypeRequest<Uri>) loadFromMediaStore(uri)
+                .signature(signature);
     }
 
     /**
@@ -370,11 +376,14 @@ public class RequestManager implements LifecycleListener {
      *
      * @see #load(Integer)
      * @see #using(StreamModelLoader)
+     * @see com.bumptech.glide.signature.ApplicationVersionSignature
+     * @see com.bumptech.glide.GenericRequestBuilder#signature(com.bumptech.glide.load.Key)
      *
      * @param resourceId the id of the resource containing the image
      */
     public DrawableTypeRequest<Integer> load(Integer resourceId) {
-        return loadGeneric(resourceId);
+        return (DrawableTypeRequest<Integer>) loadGeneric(resourceId)
+                .signature(ApplicationVersionSignature.obtain(context));
     }
 
     /**
@@ -394,6 +403,13 @@ public class RequestManager implements LifecycleListener {
     /**
      * Returns a request builder that uses a {@link StreamByteArrayLoader} to load an image from the given byte array.
      *
+     * @deprecated Use {@link #load(byte[])} along with
+     * {@link com.bumptech.glide.GenericRequestBuilder#signature(com.bumptech.glide.load.Key)}} instead.
+     *
+     * <p>
+     *     Note - This method does not cache results in either the disk cache or the memory cache.
+     * </p>
+     *
      * @see #load(byte[])
      *
      * @param model The data to load.
@@ -402,12 +418,12 @@ public class RequestManager implements LifecycleListener {
      * @return A {@link DrawableTypeRequest} to set options for the load and ultimately the target to load the image
      * into.
      */
+    @Deprecated
     public DrawableTypeRequest<byte[]> load(byte[] model, final String id) {
-        final StreamByteArrayLoader loader = new StreamByteArrayLoader(id);
-        // TODO: just use signature instead of id here?
-        return optionsApplier.apply(model,
-                new DrawableTypeRequest<byte[]>(model, loader, null, context, glide, requestTracker, lifecycle,
-                        optionsApplier));
+        return (DrawableTypeRequest<byte[]>) loadGeneric(model)
+                .signature(new StringSignature(id))
+                .diskCacheStrategy(DiskCacheStrategy.NONE)
+                .skipMemoryCache(true /*skipMemoryCache*/);
     }
 
     /**
@@ -421,7 +437,10 @@ public class RequestManager implements LifecycleListener {
      * into.
      */
     public DrawableTypeRequest<byte[]> load(byte[] model) {
-        return load(model, UUID.randomUUID().toString());
+        return (DrawableTypeRequest<byte[]>) loadGeneric(model)
+                .signature(new StringSignature(UUID.randomUUID().toString()))
+                .diskCacheStrategy(DiskCacheStrategy.NONE)
+                .skipMemoryCache(true /*skipMemoryCache*/);
     }
 
     /**

library/src/main/java/com/bumptech/glide/load/model/stream/StreamByteArrayLoader.java

 package com.bumptech.glide.load.model.stream;
 
+import android.content.Context;
 import com.bumptech.glide.load.data.ByteArrayFetcher;
 import com.bumptech.glide.load.data.DataFetcher;
+import com.bumptech.glide.load.model.GenericLoaderFactory;
+import com.bumptech.glide.load.model.ModelLoader;
+import com.bumptech.glide.load.model.ModelLoaderFactory;
 
 import java.io.InputStream;
-import java.util.UUID;
 
 /**
  * A base class to convert byte arrays to input streams so they can be decoded. This class is abstract because there is
  * no simple/quick way to generate an id from the bytes themselves, so subclass must include an id.
  */
 public class StreamByteArrayLoader implements StreamModelLoader<byte[]> {
-    private String id;
+    private final String id;
 
     public StreamByteArrayLoader() {
-        this(UUID.randomUUID().toString());
+        this("");
     }
 
+    /**
+     * @deprecated Use {@link com.bumptech.glide.GenericRequestBuilder#signature(com.bumptech.glide.load.Key)}
+     * and the empty constructor instead.
+     */
+    @Deprecated
     public StreamByteArrayLoader(String id) {
         this.id = id;
     }
@@ -25,4 +33,20 @@ public class StreamByteArrayLoader implements StreamModelLoader<byte[]> {
     public DataFetcher<InputStream> getResourceFetcher(byte[] model, int width, int height) {
         return new ByteArrayFetcher(model, id);
     }
+
+    /**
+     * Factory for {@link com.bumptech.glide.load.model.stream.StreamByteArrayLoader}.
+     */
+    public static class Factory implements ModelLoaderFactory<byte[], InputStream> {
+
+        @Override
+        public ModelLoader<byte[], InputStream> build(Context context, GenericLoaderFactory factories) {
+            return new StreamByteArrayLoader();
+        }
+
+        @Override
+        public void teardown() {
+            // Do nothing.
+        }
+    }
 }

library/src/main/java/com/bumptech/glide/signature/ApplicationVersionSignature.java

@@ -47,7 +47,6 @@ public final class ApplicationVersionSignature {
             // Should never happen.
             e.printStackTrace();
         }
-
         final String versionCode;
         if (pInfo != null) {
             versionCode = String.valueOf(pInfo.versionCode);