Android Open Source - TipOnDiscount Data Model Persister Impl

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License

The source code is released under:

GNU General Public License

Java Source Code

// Copyright 2013 David A. Greenbaum
/*/*w  w  w  .  j a  v  a  2  s.c o  m*/
This file is part of Tip On Discount.

Tip On Discount is free software: you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.

Tip On Discount is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with Tip On Discount.  If not, see <http://www.gnu.org/licenses/>.
*/
package com.itllp.tipOnDiscount.model.persistence.impl;

import java.math.BigDecimal;

import android.content.Context;
import android.widget.Toast;

import com.itllp.tipOnDiscount.model.DataModel;
import com.itllp.tipOnDiscount.model.persistence.DataModelPersister;
import com.itllp.tipOnDiscount.persistence.Persister;

public class DataModelPersisterImpl implements DataModelPersister {
  private Persister persister;
  
  public DataModelPersisterImpl(Persister persister) {
    this.persister = persister;
  }


  /* (non-Javadoc)
   * @see com.itllp.tipOnDiscount.model.persistence.impl.DataModelPersister#saveState(com.itllp.tipOnDiscount.model.DataModel, com.itllp.tipOnDiscount.persistence.Persister, android.content.Context)
   */
  @Override
  public void saveState(DataModel model, Context context) {
    persister.beginSave(context);
    try {
      persister.save(DataModelPersister.BILL_TOTAL_KEY, model.getBillTotal());
      if (model.isUsingTaxRate()) {
        persister.save(DataModelPersister.TAX_RATE_KEY, model.getTaxRate());
      } else {
        persister.save(DataModelPersister.TAX_AMOUNT_KEY, model.getTaxAmount());
      }
      persister.save(DataModelPersister.DISCOUNT_KEY, model.getDiscount());
      persister.save(DataModelPersister.PLANNED_TIP_RATE_KEY, 
          model.getPlannedTipRate());
      persister.save(DataModelPersister.SPLIT_BETWEEN_KEY, 
          model.getSplitBetween());
      persister.save(DataModelPersister.ROUND_UP_TO_NEAREST_AMOUNT_KEY, 
          model.getRoundUpToAmount());
      persister.save(DataModelPersister.BUMPS_KEY, model.getBumps());
      persister.endSave();
    } catch (Exception e) {
      Toast.makeText(context,
                "Failed to save state", Toast.LENGTH_LONG).show();
    }
  }

  
  /* (non-Javadoc)
   * @see com.itllp.tipOnDiscount.model.persistence.impl.DataModelPersister#restoreState(com.itllp.tipOnDiscount.model.DataModel, com.itllp.tipOnDiscount.persistence.Persister, android.content.Context)
   */
  @Override
  public void restoreState(DataModel dataModel, Context context) {
    
    BigDecimal billTotal = persister.retrieveBigDecimal(context, 
        DataModelPersister.BILL_TOTAL_KEY);
    if (null != billTotal) {
      dataModel.setBillTotal(billTotal);
    }
    
    BigDecimal taxRate = persister.retrieveBigDecimal(context, 
        DataModelPersister.TAX_RATE_KEY);
    if (null != taxRate) {
      dataModel.setTaxRate(taxRate);
    }
    
    BigDecimal taxAmount = persister.retrieveBigDecimal(context, 
        DataModelPersister.TAX_AMOUNT_KEY);
    if (null != taxAmount) {
      dataModel.setTaxAmount(taxAmount);
    }
    
    BigDecimal discount = persister.retrieveBigDecimal(context, 
        DataModelPersister.DISCOUNT_KEY);
    if (null != discount) {
      dataModel.setDiscount(discount);
    }
    
    BigDecimal tipRate = persister.retrieveBigDecimal(context, 
        DataModelPersister.PLANNED_TIP_RATE_KEY);
    if (null != tipRate) {
      dataModel.setPlannedTipRate(tipRate);
    }
    
    Integer splits = persister.retrieveInteger(context, 
        DataModelPersister.SPLIT_BETWEEN_KEY);
    if (null != splits) {
      dataModel.setSplitBetween(splits.intValue());
    }
    
    BigDecimal roundUp = persister.retrieveBigDecimal(context, 
        DataModelPersister.ROUND_UP_TO_NEAREST_AMOUNT_KEY);
    if (null != roundUp) {
      dataModel.setRoundUpToAmount(roundUp);
    }
    
    Integer bumps = persister.retrieveInteger(context, 
        DataModelPersister.BUMPS_KEY);
    if (null != bumps) {
      dataModel.setBumps(bumps.intValue());
    }
  }
}

Java Source Code List

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