Android - SQLiteでの複数レコード挿入

複数のレコードを追加するためのメソッドを作成しました。
conflictAlgorithm には, SQLiteDatabase.CONFLICT_NONE, SQLiteDatabase.CONFLICT_REPLACE などの, コンフリクトが発生した場合の処理を指定します。
また, transaction を true にした場合は, トランザクション処理を併用します。

/**
 * insert a lot of data
 *
 * @param nullColumnHack 
 * @param valueList 値のリスト
 * @param conflictAlgorithm コンフリクト発生時の処理
 * @param transaction トランザクション処理を併用するか否か
 * @return Boolean 成功 or 失敗
 */
public Boolean insertMany(SQLiteDatabase db , String table , String nullColumnHack, List<ContentValues> valueList, int conflictAlgorithm, Boolean transaction) {
    
    if(valueList != null && valueList.size() > 0){
        String[] CONFLICT_VALUES = new String[]{"", " OR ROLLBACK ", " OR ABORT ", " OR FAIL ", " OR IGNORE ", " OR REPLACE "};

        // At first, create sql statement
        ContentValues initialValues = valueList.get(0);
        
        // Measurements show most sql lengths <= 152
        StringBuilder sql_build = new StringBuilder(152);
        sql_build.append("INSERT");
        sql_build.append(CONFLICT_VALUES[conflictAlgorithm]);
        sql_build.append(" INTO ");
        sql_build.append(table);
        // Measurements show most values lengths < 40
        StringBuilder values = new StringBuilder(40);

        Set<Map.Entry<String, Object>> entrySet = null;
        
        if (initialValues != null && initialValues.size() > 0) {
            entrySet = initialValues.valueSet();
            Iterator<Map.Entry<String, Object>> entriesIter = entrySet.iterator();
            sql_build.append('(');

            boolean needSeparator = false;
            while (entriesIter.hasNext()) {
                if (needSeparator) {
                    sql_build.append(", ");
                    values.append(", ");
                }
                needSeparator = true;
                Map.Entry<String, Object> entry = entriesIter.next();
                sql_build.append(entry.getKey());
                values.append('?');
            }
            sql_build.append(')');
        } else {
            sql_build.append("(" + nullColumnHack + ") ");
            values.append("NULL");
        }

        sql_build.append(" VALUES(");
        sql_build.append(values);
        sql_build.append(");");
        String sql = sql_build.toString();
        
        SQLiteStatement statement = null;
        
        // if transaction id true, beginTransaction()
        if(transaction){
            db.beginTransaction();
        }
        try {
            for(int i=0,length=valueList.size(); i<length; i++){
                statement = db.compileStatement(sql);
                initialValues = valueList.get(i);
                entrySet = initialValues.valueSet();
                
                // Bind the values
                if (entrySet != null) {
                    int size = entrySet.size();
                    Iterator<Map.Entry<String, Object>> entriesIter = entrySet.iterator();
                    for (int j = 0; j < size; j++) {
                        Map.Entry<String, Object> entry = entriesIter.next();
                        DatabaseUtils.bindObjectToProgram(statement, j + 1, entry.getValue());
                    }
                }
                // Run the program and then cleanup
                statement.execute();
                statement.close();
            }
            
            // if transaction id true, setTransactionSuccessful()
            if(transaction){
                db.setTransactionSuccessful();
                db.endTransaction();
                transaction = false;
            }
            return true;
        } catch (SQLiteDatabaseCorruptException e) {
            throw e;
        } finally {
            if (statement != null) {
                statement.close();
            }
            // if transaction id true, endTransaction()
            if(transaction){
                db.endTransaction();
            }
        }
    }
    return false;
}