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1. Added new method in db helper for inserting data in to database us…
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…ing transaction for faster data insertion and faster execution time.
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@amitjangid80
amitjangid80 committed Mar 6, 2019
1 parent 0159e65 commit cb46b91
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Showing 3 changed files with 250 additions and 12 deletions.
160 changes: 157 additions & 3 deletions app/src/main/java/com/amit/db/DBHelper.java
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Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,7 @@ public class DBHelper
private static final String TAG = DBHelper.class.getSimpleName();

private final Database db;

private ArrayList<DbData> dbDataArrayList = new ArrayList<>();
private ArrayList<DbColumn> dbColumnArrayList = new ArrayList<>();

Expand Down Expand Up @@ -1036,6 +1036,152 @@ public DBHelper insertData(String tableName)

return this;
}

//#region COMMENTS FOR insertDataWithTransaction method
/**
* 2019 January 09 - Wednesday - 06:49 PM
* insert data with transaction method
*
* @param tableName - name of the table where the data is to be inserted
*
* this method will insert data into table using database transaction
* this method is useful for inserting bulk records into table in less time
**/
//#endregion COMMENTS FOR insertDataWithTransaction method
@Deprecated
public DBHelper insertDataWithTransaction(String tableName)
{
if (dbDataArrayList == null || dbDataArrayList.size() == 0)
{
Log.e(TAG, "insertDataWithTransaction: Db Data was not provided. Cannot insert data in table.");
return this;
}

// tree set is used for removing duplicate column name from data array list
TreeSet<String> treeSet = new TreeSet<>();

// this array list will hold unique column name from data array list
ArrayList<String> columnsArrayList = new ArrayList<>();

// loop for removing duplicate values from data array list
// for (int i = 0; i < dbDataArrayList.size(); i++)
for (int i = 0; i < dbDataArrayList.size(); i++)
{
for (DbData item : dbDataArrayList)
{
// checking if tree set contains columns from data array list
// if not contains then adding it to columns array list
if (!treeSet.contains(item.columnName))
{
// column name not present in columns array list
// adding to columns array list and tree set
treeSet.add(item.columnName);
columnsArrayList.add(item.columnName);
}
}
}

// getting columns count for generating insert query
// and inserting records into corresponding columns
int columnCount = columnsArrayList.size();

// this string builder is used to append names of columns for the query
// for saving records into corresponding columns
StringBuilder queryBuilder = new StringBuilder();

// this string builder is used to append indexes for the query
StringBuilder indexesBuilder = new StringBuilder();

// generating insert query
queryBuilder.append("INSERT INTO ").append(tableName).append(" (");
indexesBuilder.append(" VALUES (");

// loop for generating insert query with columns name and indexes
for (int i = 0; i < columnCount; i++)
{
indexesBuilder.append("?");
queryBuilder.append(columnsArrayList.get(i));

// checking if column's count is equals to i
// if yes then appending brackets
// else appending comma
if (i == columnCount - 1)
{
queryBuilder.append(")");
indexesBuilder.append(")");
}
else
{
queryBuilder.append(" , ");
indexesBuilder.append(" , ");
}
}

// this is final query
String query = queryBuilder.toString() + indexesBuilder.toString();
Log.e(TAG, "insertDataWithTransaction: Insert query with transaction is: " + query);

// starting database transaction for inserting records
db.getWritableDatabase().beginTransaction();

// compiling insert query with indexes
SQLiteStatement statement = db.getWritableDatabase().compileStatement(query);

// this position is used for SQLite statement
// for binding data with columns
int position = 0;

// loop for inserting records with statement
for (int i = 0; i <= dbDataArrayList.size(); i++)
{
// checking if position is equals to column count
// this check will make sure that only those records get inserted
// for which the columns are passed
// irrespective of no of columns table has
// if yes then executing the statement
if (position == columnCount)
{
position = 0;
statement.execute();
statement.clearBindings();
}

// checking if i is equals to data array list's size
// if yes then breaking loop so the below code is not executed
// this check will ensure that last records are inserted
// and no index out of bound exception occurs
if (i == dbDataArrayList.size())
{
continue;
}

// increasing the position value by 1 for mapping data with column
position += 1;

// retrieving data from data array list
Object columnData = dbDataArrayList.get(i).columnData;

// checking the type of data and binding to corresponding type
if (columnData instanceof Integer)
{
statement.bindLong(position, Integer.parseInt(columnData.toString()));
}
else if (columnData instanceof String )
{
statement.bindString(position, columnData.toString());
}
else if (columnData instanceof Double || columnData instanceof Float)
{
statement.bindDouble(position, Double.parseDouble(columnData.toString()));
}
}

db.getWritableDatabase().setTransactionSuccessful();
db.getWritableDatabase().endTransaction();

dbDataArrayList = new ArrayList<>();
return this;
}

//#region COMMENTS FOR insertDataWithTransaction method
/**
Expand All @@ -1044,11 +1190,13 @@ public DBHelper insertData(String tableName)
*
* @param tableName - name of the table where the data is to be inserted
*
* @param dbColumnCount - total number of columns in the table you want to insert data
*
* this method will insert data into table using database transaction
* this method is useful for inserting bulk records into table in less time
**/
//#endregion COMMENTS FOR insertDataWithTransaction method
public DBHelper insertDataWithTransaction(String tableName)
public DBHelper insertDataWithTransaction(String tableName, int dbColumnCount)
{
if (dbDataArrayList == null || dbDataArrayList.size() == 0)
{
Expand All @@ -1063,10 +1211,16 @@ public DBHelper insertDataWithTransaction(String tableName)
ArrayList<String> columnsArrayList = new ArrayList<>();

// loop for removing duplicate values from data array list
for (int i = 0; i < dbDataArrayList.size(); i++)
// for (int i = 0; i < dbDataArrayList.size(); i++)
for (int i = 0; i < dbColumnCount; i++)
{
for (DbData item : dbDataArrayList)
{
if (columnsArrayList.size() == dbColumnCount)
{
break;
}

// checking if tree set contains columns from data array list
// if not contains then adding it to columns array list
if (!treeSet.contains(item.columnName))
Expand Down
31 changes: 30 additions & 1 deletion app/src/main/java/com/amit/utilities/TextUtils.java
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@
* Created By AMIT JANGID
* 2018 April 17 - Tuesday - 12:52 PM
**/
@SuppressWarnings("unused")
@SuppressWarnings({"unused", "WeakerAccess"})
public class TextUtils
{
/**
Expand Down Expand Up @@ -80,6 +80,35 @@ else if (stringToReplace.equalsIgnoreCase(""))
return Integer.parseInt(stringToReplace);
}
}

/**
* replace null method
* this method will replace null with empty space
*
* @param string - string where you want to replace null
* @return it will return empty string
**/
public static String replaceNullWithDash(String string)
{
if (string == null)
{
return "-";
}
else if (string.equalsIgnoreCase("null"))
{
return "-";
}
else if (string.equalsIgnoreCase(" "))
{
return "-";
}
else if (string.equalsIgnoreCase(""))
{
return "-";
}

return string;
}

/**
* 2018 September 14 - Friday - 12:34 PM
Expand Down
71 changes: 63 additions & 8 deletions app/src/main/java/com/amit/views/DatePickerFragment.java
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Original file line number Diff line number Diff line change
Expand Up @@ -20,14 +20,18 @@
* this class will display a date picker dialog
* it will return selected date in the format defined
**/
@SuppressWarnings({"unused", "deprecation"})
@SuppressWarnings({"unused", "deprecation", "DeprecatedIsStillUsed"})
public class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener
{
private static final String TAG = DatePickerFragment.class.getSimpleName();

private Calendar calendar;
private Calendar mCalendar;

@Deprecated
private SelectedDate mSelectedDate;

private OnDateSelectedListener mOnDateSelectedListener;

private static boolean mIsCurrentDateMin;
private static String mSelectedDateFormat;

Expand All @@ -44,6 +48,7 @@ public class DatePickerFragment extends DialogFragment implements DatePickerDial
*
* @param isCurrentDateMin - pass true to set current date as minimum date else pass false.
**/
@Deprecated
public void showDatePickerDialog(@NonNull Context context, @NonNull SelectedDate selectedDate,
@NonNull String selectedDateFormat, boolean isCurrentDateMin)
{
Expand All @@ -55,15 +60,40 @@ public void showDatePickerDialog(@NonNull Context context, @NonNull SelectedDate
datePickerFragment.show(((Activity) context).getFragmentManager(), "DatePicker");
}

/**
* 2018 October 24 - Wednesday - 03:34 PM
* show date picker dialog method
*
* this method will show the date picker dialog fragment
*
* @param context - context of the application
* @param onDateSelectedListener - interface of date picker fragment for getting the selected date value
* @param selectedDateFormat - format in which you want the date.
* Example: yyyy-MM-dd hh:mm:ss
*
* @param isCurrentDateMin - pass true to set current date as minimum date else pass false.
**/
public void showDatePickerDialog(@NonNull Context context,
@NonNull OnDateSelectedListener onDateSelectedListener,
@NonNull String selectedDateFormat, boolean isCurrentDateMin)
{
mIsCurrentDateMin = isCurrentDateMin;
mSelectedDateFormat = selectedDateFormat;

DatePickerFragment datePickerFragment = new DatePickerFragment();
datePickerFragment.initializeInterface(onDateSelectedListener);
datePickerFragment.show(((Activity) context).getFragmentManager(), "DatePicker");
}

@Override
public Dialog onCreateDialog(Bundle savedInstanceState)
{
// Use the current date as the default date in the picker
calendar = Calendar.getInstance();
mCalendar = Calendar.getInstance();

int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH);
int day = calendar.get(Calendar.DAY_OF_MONTH);
int year = mCalendar.get(Calendar.YEAR);
int month = mCalendar.get(Calendar.MONTH);
int day = mCalendar.get(Calendar.DAY_OF_MONTH);

// Create a new instance of DatePickerDialog and return it
DatePickerDialog datePickerDialog = new DatePickerDialog(getActivity(), this, year, month, day);
Expand All @@ -79,25 +109,50 @@ public Dialog onCreateDialog(Bundle savedInstanceState)
@Override
public void onDateSet(DatePicker view, int year, int month, int dayOfMonth)
{
calendar.set(year, month, dayOfMonth);
mCalendar.set(year, month, dayOfMonth);
SimpleDateFormat sdf = new SimpleDateFormat(mSelectedDateFormat, Locale.getDefault());

String selectedDate = sdf.format(calendar.getTime());
String selectedDate = sdf.format(mCalendar.getTime());
Log.e(TAG, "onDateSet: selected date is: " + selectedDate);

if (mSelectedDate != null)
{
mSelectedDate.selectedDate(selectedDate);
}
else
{
Log.e(TAG, "onDateSet: selectedDate interface is null.");
}

if (mOnDateSelectedListener != null)
{
mOnDateSelectedListener.onDateSelected(selectedDate);
}
else
{
Log.e(TAG, "onDateSet: onDateSelectedListener interface is null.");
}
}

@Deprecated
private void initializeInterface(SelectedDate selectedDate)
{
this.mSelectedDate = selectedDate;
}

private void initializeInterface(OnDateSelectedListener onDateSelectedListener)
{
this.mOnDateSelectedListener = onDateSelectedListener;
}

@Deprecated
public interface SelectedDate
{
void selectedDate(String selectedDate);
}

public interface OnDateSelectedListener
{
void onDateSelected(String selectedDate);
}
}

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