<?php

abstract class Index extends Entity implements IteratorAggregate {
	
	protected static
		$type,
		$subType,
		$rootType,
		$parentType = 'Model';
	
	
	public function getIterator () {
		
		return $this->__get('Field');
		
	}
	
	final public function getField ( $name ) {
		
		if ( empty($this->data['fields'][$name]) )
			return null;
		
		return Field::get($this->getParent()->getName(1) . '.' . $name);
		
	}
	
	final public function getFieldsData ( $name = null ) {
		
		if ( $name && !empty($this->data['fields'][$name]) )
			return $this->data['fields'][$name];
		
		elseif ( $name )
			return null;
		
		return $this->data['fields'];
		
	}
	
	final public function getPositionField ( $position ) {
		
		if ( empty($this->data['fields'][$position]) )
			return null;
		
		return $this->getField($this->data['fields'][$position]);
		
	}
	
	final public function getPositionFieldsData ( $position = null ) {
		
		if ( $position && !empty($this->data['fields'][$position]) )
			return $this->data['fields'][$this->data['fields'][$position]];
		
		elseif ( $name )
			return null;
		
		return $this->data['fields'];
		
	}
	
}

?>