Initial checkin of the Java OfflineContentProvider

components/offline_items_collection/core/android/offline_item_bridge.cc

Index: components/offline_items_collection/core/android/offline_item_bridge.cc
diff --git a/components/offline_items_collection/core/android/offline_item_bridge.cc b/components/offline_items_collection/core/android/offline_item_bridge.cc
new file mode 100644
index 0000000000000000000000000000000000000000..477bf7b07571ef139805d5a578911c07ffe1cae6
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+++ b/components/offline_items_collection/core/android/offline_item_bridge.cc
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+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/offline_items_collection/core/android/offline_item_bridge.h"
+
+#include "base/android/jni_string.h"
+#include "jni/OfflineItemBridge_jni.h"
+
+using base::android::ConvertUTF8ToJavaString;
+using base::android::ScopedJavaLocalRef;
+
+namespace offline_items_collection {
+namespace android {
+
+namespace {
+
+// Helper method to unify the OfflineItem conversion argument list to a single
+// place.  This is meant to reduce code churn from OfflineItem member
+// modification.  The behavior is as follows:
+// - The method always returns the new Java OfflineItem instance.
+// - If |jlist| is specified (an ArrayList<OfflineItem>), the item is added to
+//   that list.  |jlist| can also be null, in which case the item isn't added to
+//   anything.
+ScopedJavaLocalRef<jobject> createOfflineItemAndMaybeAddToList(
+    JNIEnv* env,
+    ScopedJavaLocalRef<jobject> jlist,
+    const OfflineItem& item) {
+  return Java_OfflineItemBridge_createOfflineItemAndMaybeAddToList(
+      env, jlist, ConvertUTF8ToJavaString(env, item.id.name_space),
+      ConvertUTF8ToJavaString(env, item.id.id),
+      ConvertUTF8ToJavaString(env, item.title),
+      ConvertUTF8ToJavaString(env, item.description),
+      static_cast<jint>(item.filter), item.total_size_bytes,
+      item.externally_removed, item.creation_time.ToJavaTime(),
+      item.last_accessed_time.ToJavaTime(),
+      ConvertUTF8ToJavaString(env, item.page_url.spec()),
+      ConvertUTF8ToJavaString(env, item.original_url.spec()),
+      item.is_off_the_record, static_cast<jint>(item.state), item.is_resumable,
+      item.received_bytes, item.percent_completed, item.time_remaining_ms);
+}
+
+}  // namespace
+
+// static
+ScopedJavaLocalRef<jobject> OfflineItemBridge::CreateOfflineItem(
+    JNIEnv* env,
+    const OfflineItem* const item) {
+  return item ? createOfflineItemAndMaybeAddToList(env, nullptr, *item)
+              : nullptr;
+}
+
+// static
+ScopedJavaLocalRef<jobject> OfflineItemBridge::CreateOfflineItemList(
+    JNIEnv* env,
+    const std::vector<OfflineItem>& items) {
+  ScopedJavaLocalRef<jobject> jlist =
+      Java_OfflineItemBridge_createArrayList(env);
+
+  for (const auto& item : items)
+    createOfflineItemAndMaybeAddToList(env, jlist, item);
+
+  return jlist;
+}
+
+OfflineItemBridge::OfflineItemBridge() = default;
+
+}  // namespace android
+}  // namespace offline_items_collection