Android Open Source - FastBudget3 Category Validator

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Back to project page FastBudget3.

License

The source code is released under:

GNU General Public License

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Java Source Code

package de.splitstudio.fastbudget3.db;
// w w w  .  j  a v  a 2 s  .  c o  m
import static de.splitstudio.fastbudget3.db.CategoryValidator.CategoryValidationResult.Duplicate;
import static de.splitstudio.fastbudget3.db.CategoryValidator.CategoryValidationResult.Empty;
import static de.splitstudio.fastbudget3.db.CategoryValidator.CategoryValidationResult.InvalidNumber;
import static de.splitstudio.fastbudget3.db.CategoryValidator.CategoryValidationResult.Ok;

import java.text.ParseException;

import de.splitstudio.fastbudget3.R;
import de.splitstudio.utils.NumberUtils;

//TODO (Jan 18, 2014): find a more concise way to validate user inputs
public class CategoryValidator {

  public enum CategoryValidationResult {
    //@formatter:off
    Ok           (android.R.string.ok), 
    Duplicate    (R.string.error_name_duplicated), 
    Empty        (R.string.error_name_empty),
    InvalidNumber(R.string.error_invalid_number),
    ;
    //@formatter:on

    public final int stringId;

    private CategoryValidationResult(int stringId) {
      this.stringId = stringId;

    }
  }

  private final CategoryDao categoryDao;

  private final String name;
  private final String amount;

  private int amountInCent;

  private final CategoryValidationResult result;

  public CategoryValidator(CategoryDao categoryDao, String name, String amount) {
    this.categoryDao = categoryDao;
    this.name = name;
    this.amount = amount;
    this.result = validate();
  }

  private CategoryValidationResult validate() {
    if (isNameEmpty()) {
      return Empty;
    }
    if (isAmountNotANumber()) {
      return InvalidNumber;
    }
    if (isCategoryNameDuplicated()) {
      return Duplicate;
    }
    return Ok;
  }

  private boolean isAmountNotANumber() {
    try {
      amountInCent = NumberUtils.parseCent(amount);
      return false;
    } catch (ParseException e) {
      return true;
    }
  }

  public String getName() {
    return name;
  }

  public CategoryValidationResult getResult() {
    return result;
  }

  private boolean isNameEmpty() {
    return name.trim().isEmpty();
  }

  private boolean isCategoryNameDuplicated() {
    return categoryDao.findByName(name) != null;
  }

  public int getAmountInCent() {
    return amountInCent;
  }

}

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