/* * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net) * * 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 net.micode.notes.model; import android.content.ContentProviderOperation; import android.content.ContentProviderResult; import android.content.ContentUris; import android.content.ContentValues; import android.content.Context; import android.content.OperationApplicationException; import android.net.Uri; import android.os.RemoteException; import android.util.Log; import net.micode.notes.data.Notes; import net.micode.notes.data.Notes.CallNote; import net.micode.notes.data.Notes.DataColumns; import net.micode.notes.data.Notes.NoteColumns; import net.micode.notes.data.Notes.TextNote; import java.util.ArrayList; /** * 笔记数据模型类,负责的底层数据操作的模型类, * 封装了笔记的基础数据(文本、通话记录)和核心属性(修改时间等) * 与ContentProvider交互,实现笔记数据的创建、更新、同步等底层逻辑, * 仅处理数据存储逻辑,不包含UI交互或业务判断,不包含业务逻辑 */ public class Note { private ContentValues mNoteDiffValues; //存储Note属性变化,修改时间等 private NoteData mNoteData; //封装Note具体数据,文本内容、通话记录等 private static final String TAG = "Note"; /** * Create a new note id for adding a new note to databases * 静态同步方法:创建新笔记并返回其ID * 作用:在数据库中初始化一条笔记记录,为后续添加内容(文本/通话记录)做准备 * @param context 上下文(用于获取内容解析器) * @param folderId 笔记所属文件夹ID(用于归类) * @return 新创建的笔记ID */ public static synchronized long getNewNoteId(Context context, long folderId) { // Create a new note in the database ContentValues values = new ContentValues(); long createdTime = System.currentTimeMillis(); values.put(NoteColumns.CREATED_DATE, createdTime); values.put(NoteColumns.MODIFIED_DATE, createdTime); values.put(NoteColumns.TYPE, Notes.TYPE_NOTE); values.put(NoteColumns.LOCAL_MODIFIED, 1); values.put(NoteColumns.PARENT_ID, folderId); Uri uri = context.getContentResolver().insert(Notes.CONTENT_NOTE_URI, values); long noteId = 0; try { noteId = Long.valueOf(uri.getPathSegments().get(1)); } catch (NumberFormatException e) { Log.e(TAG, "Get note id error :" + e.toString()); noteId = 0; } if (noteId == -1) { throw new IllegalStateException("Wrong note id:" + noteId); } return noteId; } //初始化Note数据容器,存储属性变化和具体数据 public Note() { mNoteDiffValues = new ContentValues(); mNoteData = new NoteData(); } public void setNoteValue(String key, String value) { mNoteDiffValues.put(key, value); mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1); mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis()); } //设置Note的文本数据(如笔记内容) public void setTextData(String key, String value) { mNoteData.setTextData(key, value); } //设置文本数据的ID(用于更新已有文本数据时定位记录) public void setTextDataId(long id) { mNoteData.setTextDataId(id); } public long getTextDataId() { return mNoteData.mTextDataId; } public void setCallDataId(long id) { mNoteData.setCallDataId(id); } public void setCallData(String key, String value) { mNoteData.setCallData(key, value); } //是否有本地修改 public boolean isLocalModified() { return mNoteDiffValues.size() > 0 || mNoteData.isLocalModified(); } //同步Note数据到数据库 public boolean syncNote(Context context, long noteId) { if (noteId <= 0) { throw new IllegalArgumentException("Wrong note id:" + noteId); } if (!isLocalModified()) { return true; } /** * In theory, once data changed, the note should be updated on {@link NoteColumns#LOCAL_MODIFIED} and * {@link NoteColumns#MODIFIED_DATE}. For data safety, though update note fails, we also update the * note data info */ //更新笔记属性(如修改时间、本地修改标记等) if (context.getContentResolver().update( ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), mNoteDiffValues, null, null) == 0) { Log.e(TAG, "Update note error, should not happen"); // Do not return, fall through } mNoteDiffValues.clear(); //同步具体数据(文本/通话记录),若数据有修改且同步失败,返回false if (mNoteData.isLocalModified() && (mNoteData.pushIntoContentResolver(context, noteId) == null)) { return false; } return true; } /**内部类 * 管理笔记的具体数据(文本内容、通话记录) * 封装文本和通话数据的存储、修改、同步逻辑,与Note类协同工作 */ private class NoteData { private long mTextDataId;// 文本数据在数据库中的ID(0表示未创建) private ContentValues mTextDataValues; // 存储文本数据的变化 private long mCallDataId; // 通话记录数据在数据库中的ID(0表示未创建) private ContentValues mCallDataValues; // 存储通话数据的变化(如号码更新) private static final String TAG = "NoteData"; public NoteData() { mTextDataValues = new ContentValues(); mCallDataValues = new ContentValues(); mTextDataId = 0; mCallDataId = 0; } boolean isLocalModified() { return mTextDataValues.size() > 0 || mCallDataValues.size() > 0; } void setTextDataId(long id) { if(id <= 0) { throw new IllegalArgumentException("Text data id should larger than 0"); } mTextDataId = id; } void setCallDataId(long id) { if (id <= 0) { throw new IllegalArgumentException("Call data id should larger than 0"); } mCallDataId = id; } void setCallData(String key, String value) { mCallDataValues.put(key, value); mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1); mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis()); } void setTextData(String key, String value) { mTextDataValues.put(key, value); mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1); mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis()); } /** * 将文本/通话数据的变化同步到数据库 * 若数据未创建(ID=0)则插入新记录;若已创建(ID>0)则更新记录 * @param context 上下文 * @param noteId 所属笔记ID(关联数据到具体笔记) * @return 同步成功返回笔记Uri;失败返回null */ Uri pushIntoContentResolver(Context context, long noteId) { /** * Check for safety */ // 校验笔记ID有效性 if (noteId <= 0) { throw new IllegalArgumentException("Wrong note id:" + noteId); } // 创建批量操作列表(支持同时更新文本和通话数据) ArrayList operationList = new ArrayList(); ContentProviderOperation.Builder builder = null; //处理文本数据同步 if(mTextDataValues.size() > 0) { // 关联文本数据到当前笔记 mTextDataValues.put(DataColumns.NOTE_ID, noteId); //文本数据未创建 if (mTextDataId == 0) { // 插入数据到ContentProvider,获取返回的Uri mTextDataValues.put(DataColumns.MIME_TYPE, TextNote.CONTENT_ITEM_TYPE); Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI, mTextDataValues); try { // 从Uri解析新插入的文本数据ID并存储 setTextDataId(Long.valueOf(uri.getPathSegments().get(1))); } catch (NumberFormatException e) { Log.e(TAG, "Insert new text data fail with noteId" + noteId); mTextDataValues.clear(); return null; } } else { // 文本数据已存在:更新记录 // 构建更新操作(指定数据ID对应的Uri) builder = ContentProviderOperation.newUpdate(ContentUris.withAppendedId( Notes.CONTENT_DATA_URI, mTextDataId)); builder.withValues(mTextDataValues); // 设置要更新的内容 operationList.add(builder.build()); // 添加到批量操作列表 } mTextDataValues.clear(); } //处理通话数据同步(逻辑同处理文本数据同步) if(mCallDataValues.size() > 0) { mCallDataValues.put(DataColumns.NOTE_ID, noteId); if (mCallDataId == 0) { mCallDataValues.put(DataColumns.MIME_TYPE, CallNote.CONTENT_ITEM_TYPE); Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI, mCallDataValues); try { setCallDataId(Long.valueOf(uri.getPathSegments().get(1))); } catch (NumberFormatException e) { Log.e(TAG, "Insert new call data fail with noteId" + noteId); mCallDataValues.clear(); return null; } } else { builder = ContentProviderOperation.newUpdate(ContentUris.withAppendedId( Notes.CONTENT_DATA_URI, mCallDataId)); builder.withValues(mCallDataValues); operationList.add(builder.build()); } mCallDataValues.clear(); } //执行批量更新操作 if (operationList.size() > 0) { try { // 应用批量操作到ContentProvider ContentProviderResult[] results = context.getContentResolver().applyBatch( Notes.AUTHORITY, operationList); return (results == null || results.length == 0 || results[0] == null) ? null : ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId); } catch (RemoteException e) { // 远程异常(如ContentProvider断开连接) Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage())); return null; } catch (OperationApplicationException e) { // 操作执行异常(如数据约束冲突) Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage())); return null; } } return null; // 无批量操作需执行(如仅插入了新数据,未更新) } } }