| /* |
| * Copyright (C) 2012 Google Inc. |
| * Licensed to The Android Open Source Project. |
| * |
| * 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.android.mail.browse; |
| |
| import com.google.common.collect.Maps; |
| |
| import android.content.Context; |
| import android.content.CursorLoader; |
| import android.database.Cursor; |
| import android.database.CursorWrapper; |
| import android.net.Uri; |
| |
| import com.android.mail.providers.Attachment; |
| import com.android.mail.providers.UIProvider; |
| |
| import java.util.Map; |
| |
| public class AttachmentLoader extends CursorLoader { |
| |
| public AttachmentLoader(Context c, Uri uri) { |
| super(c, uri, UIProvider.ATTACHMENT_PROJECTION, null, null, null); |
| } |
| |
| @Override |
| public Cursor loadInBackground() { |
| return new AttachmentCursor(super.loadInBackground()); |
| } |
| |
| public static class AttachmentCursor extends CursorWrapper { |
| |
| private Map<String, Attachment> mCache = Maps.newHashMap(); |
| |
| private AttachmentCursor(Cursor inner) { |
| super(inner); |
| } |
| |
| public Attachment get() { |
| final String uri = getWrappedCursor().getString(UIProvider.ATTACHMENT_URI_COLUMN); |
| Attachment m = mCache.get(uri); |
| if (m == null) { |
| m = new Attachment(this); |
| mCache.put(uri, m); |
| } |
| return m; |
| } |
| } |
| } |