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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.tool;
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import android.content.ContentProviderOperation;
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import android.content.ContentProviderResult;
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import android.content.ContentResolver;
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import android.content.ContentUris;
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import android.content.ContentValues;
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import android.content.OperationApplicationException;
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import android.database.Cursor;
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import android.os.RemoteException;
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import android.util.Log;
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//导入android 包content、database等
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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.NoteColumns;
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import net.micode.notes.ui.NotesListAdapter.AppWidgetAttribute;
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//导入net-micode包下数据
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import java.util.ArrayList;
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import java.util.HashSet;
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//导入JAVA ArrayList和HashSet类
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public class DataUtils {// 对DataUtils类进行定义
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public static final String TAG = "DataUtils";// 定义静态不可变字TAG符串常量"DataUtils"
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public static boolean batchDeleteNotes(ContentResolver resolver, HashSet<Long> ids) {
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if (ids == null) {
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Log.d(TAG, "the ids is null");
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return true;
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}
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if (ids.size() == 0) {
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Log.d(TAG, "no id is in the hashset");
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return true;
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}
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// 定义批量删除笔记。若ids参数为null，输出"the ids is null"并返回true；若ids参数为0，输出"no id is in the
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// hashset"并返回true
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ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
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// 定义操作列表，存储ContentProviderOperation对象
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for (long id : ids) {// 遍历id列表
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if (id == Notes.ID_ROOT_FOLDER) {
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Log.e(TAG, "Don't delete system folder root");
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continue;
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} // 如果id为系统根目录，打印"不要删除系统根目录"并进行下一次循环
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ContentProviderOperation.Builder builder = ContentProviderOperation
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.newDelete(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
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operationList.add(builder.build());// 创造builder对象，删除指定id的ContentProviderOperation
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}
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try {// 调用applybatch
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ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
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if (results == null || results.length == 0 || results[0] == null) {
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Log.d(TAG, "delete notes failed, ids:" + ids.toString());
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return false;
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}
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return true;// 若返回为空或第一个结果为null，输出删除失败返回false，否则返回true
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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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} catch (OperationApplicationException e) {
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Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
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} // 若remoteexeption或operationapplicationexception异常，返回false
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return false;
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}
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public static void moveNoteToFoler(ContentResolver resolver, long id, long srcFolderId, long desFolderId) {
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ContentValues values = new ContentValues();// 创建contentValues对象
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values.put(NoteColumns.PARENT_ID, desFolderId);// 移动笔记至目标文件夹
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values.put(NoteColumns.ORIGIN_PARENT_ID, srcFolderId);// 更新笔记的原始父类文件夹id
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values.put(NoteColumns.LOCAL_MODIFIED, 1);
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resolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id), values, null, null);
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// 更新笔记
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}
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public static boolean batchMoveToFolder(ContentResolver resolver, HashSet<Long> ids,
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long folderId) {// 若ids为空，打印log并返回true
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if (ids == null) {
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Log.d(TAG, "the ids is null");
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return true;
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} // 用于批量移动笔记至文件夹
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ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
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for (long id : ids) {// 遍历笔记id集合
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ContentProviderOperation.Builder builder = ContentProviderOperation
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.newUpdate(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
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builder.withValue(NoteColumns.PARENT_ID, folderId);// 移动笔记至目标文件夹
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builder.withValue(NoteColumns.LOCAL_MODIFIED, 1);// 添加键值对，表示本地有效
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operationList.add(builder.build());// 添加操作至操作列表
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}
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try {
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ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);// 应用操作列表
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if (results == null || results.length == 0 || results[0] == null) {// 如果结果为空或者第一个结果为空，打印log并返回false
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Log.d(TAG, "delete notes failed, ids:" + ids.toString());
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return false;
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}
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return true;// true表示操作成功
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} catch (RemoteException e) {// 捕获远程异常
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Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
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} catch (OperationApplicationException e) {// 捕获操作异常
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Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
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}
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return false;// false表示操作失败
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}
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/**
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* Get the all folder count except system folders {@link Notes#TYPE_SYSTEM}}
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*/
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public static int getUserFolderCount(ContentResolver resolver) {
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Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI,
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new String[] { "COUNT(*)" },
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NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>?",
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new String[] { String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER) },
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null);
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int count = 0;
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if (cursor != null) {
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if (cursor.moveToFirst()) {
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try {
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count = cursor.getInt(0);
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} catch (IndexOutOfBoundsException e) {
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Log.e(TAG, "get folder count failed:" + e.toString());
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} finally {
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cursor.close();
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}
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}
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}
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return count;
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}// 检查笔记是否在数据库中可见，若不可见输出"get folder count failed:"
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public static boolean visibleInNoteDatabase(ContentResolver resolver, long noteId, int type) {
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Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId),
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null,
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NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER,
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new String[] { String.valueOf(type) },
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null);
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boolean exist = false;
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if (cursor != null) {
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if (cursor.getCount() > 0) {
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exist = true;
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}
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cursor.close();
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}
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return exist;
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}
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// 检查数据是否在数据库中存在
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public static boolean existInNoteDatabase(ContentResolver resolver, long noteId) {
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Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId),
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null, null, null, null);
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boolean exist = false;
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if (cursor != null) {
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if (cursor.getCount() > 0) {
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exist = true;
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}
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cursor.close();
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}
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return exist;
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}
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// 检查文件名称是否可见
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public static boolean existInDataDatabase(ContentResolver resolver, long dataId) {
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Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId),
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null, null, null, null);
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boolean exist = false;
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if (cursor != null) {
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if (cursor.getCount() > 0) {
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exist = true;
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}
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cursor.close();
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}
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return exist;
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}
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public static boolean checkVisibleFolderName(ContentResolver resolver, String name) {
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Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI, null,
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NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER +
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" AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER +
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" AND " + NoteColumns.SNIPPET + "=?",
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new String[] { name }, null);
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boolean exist = false;
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if (cursor != null) {
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if (cursor.getCount() > 0) {
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exist = true;
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}
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cursor.close();
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}
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return exist;
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}
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public static HashSet<AppWidgetAttribute> getFolderNoteWidget(ContentResolver resolver, long folderId) {
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// 查询文件夹中所有小部件id和类型
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Cursor c = resolver.query(Notes.CONTENT_NOTE_URI,
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new String[] { NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE },
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NoteColumns.PARENT_ID + "=?",
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new String[] { String.valueOf(folderId) },
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null);
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HashSet<AppWidgetAttribute> set = null;
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if (c != null) {
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if (c.moveToFirst()) {
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set = new HashSet<AppWidgetAttribute>();
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// 遍历查询结果，将小部件id和类型存入hashSET中
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do {
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try {
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AppWidgetAttribute widget = new AppWidgetAttribute();
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widget.widgetId = c.getInt(0);
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widget.widgetType = c.getInt(1);
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set.add(widget);
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} catch (IndexOutOfBoundsException e) {
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Log.e(TAG, e.toString());
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}
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} while (c.moveToNext());
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}
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c.close();
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} // 返回文件夹中所有小部件HashSet集合
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return set;
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}
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public static String getCallNumberByNoteId(ContentResolver resolver, long noteId) {// 获取一段笔记的getCallNumberByNoteId
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Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,
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new String[] { CallNote.PHONE_NUMBER },
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CallNote.NOTE_ID + "=? AND " + CallNote.MIME_TYPE + "=?",
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new String[] { String.valueOf(noteId), CallNote.CONTENT_ITEM_TYPE },
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null);
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if (cursor != null && cursor.moveToFirst()) {
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try {
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return cursor.getString(0);
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} catch (IndexOutOfBoundsException e) {// 如果查询结果不为空且有数据，则返回该行的电话号码
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Log.e(TAG, "Get call number fails " + e.toString());// 如果获取电话号码失败，则打印错误日志
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} finally {
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cursor.close();
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} // 关闭游标，释放资源
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}
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return "";// 如果没有查询结果，则返回空串
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}
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public static long getNoteIdByPhoneNumberAndCallDate(ContentResolver resolver, String phoneNumber, long callDate) {
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// 使用ContentResover对象来查询数据，并返回Cursor对象
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Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI, // 查询Note id字段
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new String[] { CallNote.NOTE_ID }, // 通过童话日期，电话号码扽给查询
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CallNote.CALL_DATE + "=? AND " + CallNote.MIME_TYPE + "=? AND PHONE_NUMBERS_EQUAL("
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+ CallNote.PHONE_NUMBER + ",?)", // 传入查询参数
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new String[] { String.valueOf(callDate), CallNote.CONTENT_ITEM_TYPE, phoneNumber },
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null);
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if (cursor != null) {
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if (cursor.moveToFirst()) {
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try {
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return cursor.getLong(0);
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} catch (IndexOutOfBoundsException e) {
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Log.e(TAG, "Get call note id fails " + e.toString());
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}
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}
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cursor.close();
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}
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return 0;
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}
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public static String getSnippetById(ContentResolver resolver, long noteId) {// 使用ContentResovler对象查询数据，返回Cursor对象
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Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI, // 查询snippet字段
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new String[] { NoteColumns.SNIPPET },
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NoteColumns.ID + "=?",
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new String[] { String.valueOf(noteId) },
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null);
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if (cursor != null) {
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String snippet = "";
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if (cursor.moveToFirst()) {// 获取查询结果中第0列的值，即snippet字段值
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snippet = cursor.getString(0);
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}
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cursor.close();
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return snippet;
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}
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throw new IllegalArgumentException("Note is not found with id: " + noteId);
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}// 通过noteld获取信息，返回字符串
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public static String getFormattedSnippet(String snippet) {
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if (snippet != null) {
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snippet = snippet.trim();
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int index = snippet.indexOf('\n');
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if (index != -1) {
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snippet = snippet.substring(0, index);
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}
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}
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return snippet;
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}
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}
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