
    /**
     * Returns whether the object has been modified.
     *
     * @return boolean True if the object has been modified.
     */
    public function isModified()
    {
        return !!$this->modifiedColumns;
    }

    /**
     * Has specified column been modified?
     *
     * @param  string  $col column fully qualified name (TableMap::TYPE_COLNAME), e.g. Book::AUTHOR_ID
     * @return boolean True if $col has been modified.
     */
    public function isColumnModified($col)
    {
        return $this->modifiedColumns && isset($this->modifiedColumns[$col]);
    }

    /**
     * Get the columns that have been modified in this object.
     * @return array A unique list of the modified column names for this object.
     */
    public function getModifiedColumns()
    {
        return $this->modifiedColumns ? array_keys($this->modifiedColumns) : [];
    }

    /**
     * Returns whether the object has ever been saved.  This will
     * be false, if the object was retrieved from storage or was created
     * and then saved.
     *
     * @return boolean true, if the object has never been persisted.
     */
    public function isNew()
    {
        return $this->new;
    }

    /**
     * Setter for the isNew attribute.  This method will be called
     * by Propel-generated children and objects.
     *
     * @param boolean $b the state of the object.
     */
    public function setNew($b)
    {
        $this->new = (boolean) $b;
    }

    /**
     * Whether this object has been deleted.
     * @return boolean The deleted state of this object.
     */
    public function isDeleted()
    {
        return $this->deleted;
    }

    /**
     * Specify whether this object has been deleted.
     * @param  boolean $b The deleted state of this object.
     * @return void
     */
    public function setDeleted($b)
    {
        $this->deleted = (boolean) $b;
    }

    /**
     * Sets the modified state for the object to be false.
     * @param  string $col If supplied, only the specified column is reset.
     * @return void
     */
    public function resetModified($col = null)
    {
        if (null !== $col) {
            if (isset($this->modifiedColumns[$col])) {
                unset($this->modifiedColumns[$col]);
            }
        } else {
            $this->modifiedColumns = array();
        }
    }

    /**
     * Compares this with another <code><?php echo $className ?></code> instance.  If
     * <code>obj</code> is an instance of <code><?php echo $className ?></code>, delegates to
     * <code>equals(<?php echo $className ?>)</code>.  Otherwise, returns <code>false</code>.
     *
     * @param  mixed   $obj The object to compare to.
     * @return boolean Whether equal to the object specified.
     */
    public function equals($obj)
    {
        if (!$obj instanceof static) {
            return false;
        }

        if ($this === $obj) {
            return true;
        }

        if (null === $this->getPrimaryKey() || null === $obj->getPrimaryKey()) {
            return false;
        }

        return $this->getPrimaryKey() === $obj->getPrimaryKey();
    }

    /**
     * Get the associative array of the virtual columns in this object
     *
     * @return array
     */
    public function getVirtualColumns()
    {
        return $this->virtualColumns;
    }

    /**
     * Checks the existence of a virtual column in this object
     *
     * @param  string  $name The virtual column name
     * @return boolean
     */
    public function hasVirtualColumn($name)
    {
        return array_key_exists($name, $this->virtualColumns);
    }

    /**
     * Get the value of a virtual column in this object
     *
     * @param  string $name The virtual column name
     * @return mixed
     *
     * @throws PropelException
     */
    public function getVirtualColumn($name)
    {
        if (!$this->hasVirtualColumn($name)) {
            throw new PropelException(sprintf('Cannot get value of inexistent virtual column %s.', $name));
        }

        return $this->virtualColumns[$name];
    }

    /**
     * Set the value of a virtual column in this object
     *
     * @param string $name  The virtual column name
     * @param mixed  $value The value to give to the virtual column
     *
     * @return $this The current object, for fluid interface
     */
    public function setVirtualColumn($name, $value)
    {
        $this->virtualColumns[$name] = $value;

        return $this;
    }

    /**
     * Logs a message using Propel::log().
     *
     * @param  string  $msg
     * @param  int     $priority One of the Propel::LOG_* logging levels
     * @return void
     */
    protected function log($msg, $priority = Propel::LOG_INFO)
    {
        Propel::log(get_class($this) . ': ' . $msg, $priority);
    }

    /**
     * Export the current object properties to a string, using a given parser format
     * <code>
     * $book = BookQuery::create()->findPk(9012);
     * echo $book->exportTo('JSON');
     *  => {"Id":9012,"Title":"Don Juan","ISBN":"0140422161","Price":12.99,"PublisherId":1234,"AuthorId":5678}');
     * </code>
     *
     * @param  mixed   $parser                 A AbstractParser instance, or a format name ('XML', 'YAML', 'JSON', 'CSV')
     * @param  boolean $includeLazyLoadColumns (optional) Whether to include lazy load(ed) columns. Defaults to TRUE.
     * @return string  The exported data
     */
    public function exportTo($parser, $includeLazyLoadColumns = true)
    {
        if (!$parser instanceof AbstractParser) {
            $parser = AbstractParser::getParser($parser);
        }

        return $parser->fromArray($this->toArray(TableMap::TYPE_PHPNAME, $includeLazyLoadColumns, array(), true));
    }

    /**
     * Clean up internal collections prior to serializing
     * Avoids recursive loops that turn into segmentation faults when serializing
     */
    public function __sleep()
    {
        $this->clearAllReferences();

        $cls = new \ReflectionClass($this);
        $propertyNames = [];
        $serializableProperties = array_diff($cls->getProperties(), $cls->getProperties(\ReflectionProperty::IS_STATIC));

        foreach($serializableProperties as $property) {
            $propertyNames[] = $property->getName();
        }

        return $propertyNames;
    }
