public function _performOperation($key, FieldOperation $operation)
    {
        $oldValue = null;
        if (isset($this->estimatedData[$key]))
        {
            $oldValue = $this->estimatedData[$key];
        }
        $newValue = $operation->_apply($oldValue, $this, $key);
        if ($newValue !== null)
        {
            $this->estimatedData[$key] = $newValue;
        } else if (isset($this->estimatedData[$key]))
        {
            unset($this->estimatedData[$key]);
        }

        if (isset($this->operationSet[$key]))
        {
            $oldOperations = $this->operationSet[$key];
            $newOperations = $operation->_mergeWithPrevious($oldOperations);
            $this->operationSet[$key] = $newOperations;
        } else
        {
            $this->operationSet[$key] = $operation;
        }
        $this->dataAvailability[$key] = true;
    }
public function _performOperation($key, FieldOperation $operation)
    {
        $oldValue = null;
        if (isset($this->estimatedData[$key]))
        {
            $oldValue = $this->estimatedData[$key];
        }
        $newValue = $operation->_apply($oldValue, $this, $key);
        if ($newValue !== null)
        {
            $this->estimatedData[$key] = $newValue;
        } else if (isset($this->estimatedData[$key]))
        {
            unset($this->estimatedData[$key]);
        }

        if (isset($this->operationSet[$key]))
        {
            $oldOperations = $this->operationSet[$key];
            $newOperations = $operation->_mergeWithPrevious($oldOperations);
            $this->operationSet[$key] = $newOperations;
        } else
        {
            $this->operationSet[$key] = $operation;
        }
        $this->dataAvailability[$key] = true;
    }
public function _performOperation ( $ key , FieldOperation $ operation ) { $ oldValue = null ; if ( isset ( $ this -> estimatedData [ $ key ] ) ) { $ oldValue = $ this -> estimatedData [ $ key ] ; } $ newValue = $ operation -> _apply ( $ oldValue , $ this , $ key ) ; if ( $ newValue !== null ) { $ this -> estimatedData [ $ key ] = $ newValue ; } else if ( isset ( $ this -> estimatedData [ $ key ] ) ) { unset ( $ this -> estimatedData [ $ key ] ) ; } if ( isset ( $ this -> operationSet [ $ key ] ) ) { $ oldOperations = $ this -> operationSet [ $ key ] ; $ newOperations = $ operation -> _mergeWithPrevious ( $ oldOperations ) ; $ this -> operationSet [ $ key ] = $ newOperations ; } else { $ this -> operationSet [ $ key ] = $ operation ; } $ this -> dataAvailability [ $ key ] = true ; }
Perform an operation on an object property.

@param string $key Key to perform an operation upon.
@param FieldOperation $operation Operation to perform.

@return null
@ignore
Perform an operation on an object property .