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/*
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* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package net.micode.notes.model;
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import android.content.ContentProviderOperation;
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import android.content.ContentProviderResult;
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import android.content.ContentUris;
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import android.content.ContentValues;
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import android.content.Context;
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import android.content.OperationApplicationException;
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import android.net.Uri;
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import android.os.RemoteException;
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import android.util.Log;//输出日志
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import net.micode.notes.data.Notes;
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import net.micode.notes.data.Notes.CallNote;
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import net.micode.notes.data.Notes.DataColumns;
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import net.micode.notes.data.Notes.NoteColumns;
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import net.micode.notes.data.Notes.TextNote;
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import java.rmi.RemoteException;
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import java.util.ArrayList;
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public class Note {
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private ContentValues mNoteDiffValues;
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private NoteData mNoteData;
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private static final String TAG = "Note";
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//为数据库添加的新便签创建一个新ID
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public static synchronized long getNewNoteId(Context context, long folderId) {
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//在数据库中创建新便签
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ContentValues values = new ContentValues();
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long createdTime = System.currentTimeMillis();//便签创建时间
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values.put(NoteColumns.CREATED_DATE, createdTime);//创建时间
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values.put(NoteColumns.MODIFIED_DATE, createdTime);//修改时间
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values.put(NoteColumns.TYPE, Notes.TYPE_NOTE);//便签类型
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values.put(NoteColumns.LOCAL_MODIFIED, 1);
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values.put(NoteColumns.PARENT_ID, folderId);//将数据写入数据库表格中
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Uri uri = context.getContentResolver().insert(Notes.CONTENT_NOTE_URI, values);
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//ContentResolver用于外部应用（比如输入法等软件）对ContentProvider中的数据进行增删查改等操作
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long noteId = 0;
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try {
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noteId = Long.valueOf(uri.getPathSegments().get(1));
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} catch (NumberFormatException e) {
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Log.e(TAG, "Get note id error :" + e.toString());
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noteId = 0;
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}//采用 try catch 语句来捕获输入便签ID异常并处理
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if (noteId == -1) {
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throw new IllegalStateException("Wrong note id:" + noteId);//非法状态警告："ID错误"
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}
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return noteId;
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}
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public Note() {
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mNoteDiffValues = new ContentValues();
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mNoteData = new NoteData();
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}//定义两个变量来存储新便签数据，mNoteDiffValues：便签属性、mNoteData：便签数据
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public void setNoteValue(String key, String value) {//设置便签种类
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mNoteDiffValues.put(key, value);
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mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
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mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
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}//新建标签属性的数据
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public void setTextData(String key, String value) {
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mNoteData.setTextData(key, value);
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}
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//便签文本内容数据
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public void setTextDataId(long id) {
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mNoteData.setTextDataId(id);
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}
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//文本数据ID
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public long getTextDataId() {
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return mNoteData.mTextDataId;
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}
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//获取文本数据ID
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public void setCallDataId(long id) {
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mNoteData.setCallDataId(id);
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}
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//电话号码数据ID
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public void setCallData(String key, String value) {
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mNoteData.setCallData(key, value);
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}
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//获取电话号码数据ID
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public boolean isLocalModified() {
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return mNoteDiffValues.size() > 0 || mNoteData.isLocalModified();
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}//判断便签是否有修改
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/**
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* Boolean变量存储为16位的数值形式，但只能是True或False。
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* 当其他的数值类型转换为Boolean类型时，0变False，其他值变True。当Boolean值转换为其他的数据类型时，False变0，而True变-1
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*/
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public boolean syncNote(Context context, long noteId) {
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if (noteId <= 0) {
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throw new IllegalArgumentException("Wrong note id:" + noteId);
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}//修改后的便签ID错误判断；IllegalArgumentException：不合法的参数异常
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if (!isLocalModified()) {
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return true;
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}
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/**
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* In theory, once data changed, the note should be updated on {@link NoteColumns#LOCAL_MODIFIED} and
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* {@link NoteColumns#MODIFIED_DATE}. For data safety, though update note fails, we also update the
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* note data info
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*/
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if (context.getContentResolver().update(
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ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), mNoteDiffValues, null,
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null) == 0) {
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Log.e(TAG, "Update note error, should not happen");
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// Do not return, fall through
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}
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mNoteDiffValues.clear();
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if (mNoteData.isLocalModified()
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&& (mNoteData.pushIntoContentResolver(context, noteId) == null)) {
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return false;
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}
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return true;
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}//判断数据有没有同步
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private class NoteData {//定义便签内容的数据类：文本数据：ContentValues类；电话号码：ContentValues类
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private long mTextDataId;
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private ContentValues mTextDataValues;
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/**
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* Contentvalues类只能存储基本类型的数据
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* Contentvalues类中有很多用于存放数据的Put方法，但是这些put方法只会接收基本数据类型的参数，因此存储的时候也就只能存储基本数据类型。
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*/
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private long mCallDataId;
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private ContentValues mCallDataValues;
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private static final String TAG = "NoteData";
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public NoteData() {
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mTextDataValues = new ContentValues();
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mCallDataValues = new ContentValues();
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mTextDataId = 0;
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mCallDataId = 0;
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}
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boolean isLocalModified() {//实现修改便签的函数
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return mTextDataValues.size() > 0 || mCallDataValues.size() > 0;
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}
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void setTextDataId(long id) {
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if(id <= 0) {
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throw new IllegalArgumentException("Text data id should larger than 0");
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}
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mTextDataId = id;
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}
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void setCallDataId(long id) {
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if (id <= 0) {
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throw new IllegalArgumentException("Call data id should larger than 0");
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}
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mCallDataId = id;
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}
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void setCallData(String key, String value) {
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mCallDataValues.put(key, value);
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mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
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mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
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}
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void setTextData(String key, String value) {
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mTextDataValues.put(key, value);
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mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
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mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
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}
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Uri pushIntoContentResolver(Context context, long noteId) {//将修改的便签数据通过Uri存储到数据库
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/**
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* Check for safety
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*/
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if (noteId <= 0) {
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throw new IllegalArgumentException("Wrong note id:" + noteId);
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}
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ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
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ContentProviderOperation.Builder builder = null;
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//数据库操作
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if(mTextDataValues.size() > 0) {
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mTextDataValues.put(DataColumns.NOTE_ID, noteId);
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if (mTextDataId == 0) {
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mTextDataValues.put(DataColumns.MIME_TYPE, TextNote.CONTENT_ITEM_TYPE);
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Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI,
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mTextDataValues);
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try {
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setTextDataId(Long.valueOf(uri.getPathSegments().get(1)));
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} catch (NumberFormatException e) {
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Log.e(TAG, "Insert new text data fail with noteId" + noteId);
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mTextDataValues.clear();
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return null;
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}
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} else {
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builder = ContentProviderOperation.newUpdate(ContentUris.withAppendedId(
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Notes.CONTENT_DATA_URI, mTextDataId));
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builder.withValues(mTextDataValues);
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operationList.add(builder.build());
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}
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mTextDataValues.clear();
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}//将便签文本数据存储至DataColumns
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if(mCallDataValues.size() > 0) {
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mCallDataValues.put(DataColumns.NOTE_ID, noteId);
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if (mCallDataId == 0) {
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mCallDataValues.put(DataColumns.MIME_TYPE, CallNote.CONTENT_ITEM_TYPE);
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Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI,
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mCallDataValues);
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try {
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setCallDataId(Long.valueOf(uri.getPathSegments().get(1)));
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} catch (NumberFormatException e) {
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Log.e(TAG, "Insert new call data fail with noteId" + noteId);
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mCallDataValues.clear();
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return null;
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}
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} else {
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builder = ContentProviderOperation.newUpdate(ContentUris.withAppendedId(
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Notes.CONTENT_DATA_URI, mCallDataId));
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builder.withValues(mCallDataValues);
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operationList.add(builder.build());
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}
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mCallDataValues.clear();
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}//将便签电话号码数据存储至DataColumns
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if (operationList.size() > 0) {
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try {
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ContentProviderResult[] results = context.getContentResolver().applyBatch(
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Notes.AUTHORITY, operationList);
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return (results == null || results.length == 0 || results[0] == null) ? null
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: ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId);
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} catch (RemoteException e) {
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Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
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return null;
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} catch (OperationApplicationException e) {
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Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
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return null;
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}
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}//存储异常处理办法
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return null;
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}
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}
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}
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