cn.code.notes.gtask.data.SqlConn.java Source code

Introduction

Here is the source code for cn.code.notes.gtask.data.SqlConn.java

Source

/*
 * 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 cn.code.notes.gtask.data;

import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.util.Log;

import org.json.JSONException;
import org.json.JSONObject;

import cn.code.notes.data.Notes;
import cn.code.notes.data.NoteColumnsInterface.ConnectColumns;
import cn.code.notes.data.NoteColumnsInterface.DataColumns;
import cn.code.notes.data.NoteColumnsInterface.NoteColumns;
import cn.code.notes.data.NotesDatabaseHelper.TABLE;
import cn.code.notes.gtask.exception.ActionFailureException;

public class SqlConn {
    private static final String TAG = SqlConn.class.getSimpleName();

    private static final int INVALID_ID = -99999;

    public static final String[] PROJECTION_DATA = new String[] { ConnectColumns.NOTE_GUID, ConnectColumns.NOTE_ID,
            ConnectColumns.NOTE_DATA_MD5 };

    public static final int GUID_COLUMN = 0;
    public static final int ID_COLUMN = 1;
    public static final int MD5_COLUMN = 2;

    private ContentResolver mContentResolver;

    private boolean mIsCreate;

    private String mGuid;

    private long mId;
    private String mDataMD5;

    private ContentValues mDiffDataValues;

    public SqlConn(Context context) {
        mContentResolver = context.getContentResolver();
        mIsCreate = true;
        mGuid = "";
        mId = INVALID_ID;
        mDataMD5 = "";
        mDiffDataValues = new ContentValues();
    }

    public SqlConn(Context context, Cursor c) {
        mContentResolver = context.getContentResolver();
        mIsCreate = false;
        loadFromCursor(c);
        mDiffDataValues = new ContentValues();
    }

    private void loadFromCursor(Cursor c) {
        mGuid = c.getString(GUID_COLUMN);
        mId = c.getLong(ID_COLUMN);
        mDataMD5 = c.getString(MD5_COLUMN);

    }

    public void setContent(JSONObject js) throws JSONException {

        String dataGUID = js.has(ConnectColumns.NOTE_GUID) ? js.getString(ConnectColumns.NOTE_GUID) : "";
        if (mIsCreate || mGuid.equals(dataGUID))
            mDiffDataValues.put(ConnectColumns.NOTE_GUID, dataGUID);
        mGuid = dataGUID;

        long dataId = js.has(ConnectColumns.NOTE_ID) ? js.getLong(ConnectColumns.NOTE_ID) : INVALID_ID;
        if (mIsCreate || mId != dataId) {
            mDiffDataValues.put(ConnectColumns.NOTE_ID, dataId);
        }
        mId = dataId;

        String dataMD5 = js.has(ConnectColumns.NOTE_DATA_MD5) ? js.getString(ConnectColumns.NOTE_DATA_MD5) : "";
        if (mIsCreate || mDataMD5.equals(dataMD5))
            mDiffDataValues.put(ConnectColumns.NOTE_GUID, dataMD5);
        mGuid = dataMD5;
    }

    public JSONObject getContent() throws JSONException {
        if (mIsCreate) {
            Log.e(TAG, "it seems that we haven't created this in database yet");
            return null;
        }
        JSONObject js = new JSONObject();
        js.put(ConnectColumns.NOTE_GUID, mGuid);
        js.put(ConnectColumns.NOTE_ID, mId);
        js.put(ConnectColumns.NOTE_DATA_MD5, mDataMD5);

        return js;
    }

    public void commit(long noteId, boolean validateVersion, long version) {

        if (mIsCreate) {
            if (mId == INVALID_ID && mDiffDataValues.containsKey(ConnectColumns.NOTE_ID)) {
                mDiffDataValues.remove(ConnectColumns.NOTE_ID);
            }

            mDiffDataValues.put(DataColumns.NOTE_ID, noteId);
            Uri uri = mContentResolver.insert(Notes.CONTENT_CONN_URI, mDiffDataValues);
            try {
                mId = Long.valueOf(uri.getPathSegments().get(1));
            } catch (NumberFormatException e) {
                Log.e(TAG, "Get note id error :" + e.toString());
                throw new ActionFailureException("create note failed");
            }
        } else {
            if (mDiffDataValues.size() > 0) {
                int result = 0;
                if (!validateVersion) {
                    result = mContentResolver.update(ContentUris.withAppendedId(Notes.CONTENT_CONN_URI, mId),
                            mDiffDataValues, null, null);
                } else {
                    result = mContentResolver.update(ContentUris.withAppendedId(Notes.CONTENT_CONN_URI, mId),
                            mDiffDataValues,
                            " ? in (SELECT " + NoteColumns.ID + " FROM " + TABLE.NOTE + " WHERE "
                                    + NoteColumns.VERSION + "=?)",
                            new String[] { String.valueOf(noteId), String.valueOf(version) });
                }
                if (result == 0) {
                    Log.w(TAG, "there is no update. maybe user updates note when syncing");
                }
            }
        }

        mDiffDataValues.clear();
        mIsCreate = false;
    }

    public String getmGuid() {
        return mGuid;
    }

    public long getmId() {
        return mId;
    }

    public String getmDataMD5() {
        return mDataMD5;
    }
}