PHP 7.1.12 Released

SDO Funktionen

Data Access Services

The table below lists the currently provided SDO Data Access Services:

DAS Name Description
SDO_DAS_XML An XML Data Access Service supporting reading/writing SDOs as XML documents.
SDO_DAS_Relational A PDO-based Data Access Service supporting reading/writing SDO to relational databases. Implements an optimistic concurrency policy for updates.

Vordefinierte Klassen

SDO consists of three sets of interfaces. The first set covers those interfaces for use by typical SDO applications. These are identified by the package prefix 'SDO_'. The second set is those used to reflect on, and work with, the model of a data object. These are identified by the package prefix 'SDO_Model_'. Finally, the third set are those use by Data Access Service implementations and are identified by the package prefix 'SDO_DAS_'. The majority of SDO users will not need to use or understand the 'SDO_Model_' and 'SDO_DAS_' interfaces.

SDO Application Programmer Interface

SDO_DataObject

The main interface through which data objects are manipulated. In addition to the methods below, SDO_DataObject extends the ArrayAccess, SDO_PropertyAccess (defines __get() / __set() methods for property access overloading), Iterator, and Countable interfaces.

Methoden

SDO_Sequence

The interface through which sequenced data objects can be accessed to preserve ordering across a data object's properties and to allow unstructured text. SDO_Sequence preserves contiguous indices and therefore inserting or removing elements may shift other elements up or down. In addition to the methods below, SDO_Sequence extends the ArrayAccess, Iterator and Countable interface.

Methoden

  • getProperty - get the property for a given sequence index

  • move - move an element from one property index to another

  • insert - insert a new value into the sequence

SDO_List

The interface through which many-valued properties are manipulated. In addition to the method defined below, SDO_List extends ArrayAccess, Iterator and Countable. SDO_List preserves contiguous indices and therefore inserting or removing elements may shift other elements up or down.

Methoden

  • insert - insert a new value into the list

SDO_DataFactory

The interface through which data objects can be created. A Data Access Service is responsible for populating the model (i.e. configuring the data factory with the type and structure information for the data objects it can create.) for the factory and can then optionally return an instance of, or implement, the SDO_DataFactory interface.

Methoden

  • create - create a new data object

SDO_Exception

An SDO_Exception is thrown when the caller's request cannot be completed. The subclasses of SDO_Exception are:

  • SDO_PropertyNotSetException - the property specified exists but has not been set or does not have a default value

  • SDO_PropertyNotFoundException - the property specified is not part of the data object's type

  • SDO_TypeNotFoundException - the specified namespace URI or type name is unknown

  • SDO_InvalidConversionException - conversion between the types of the assignment is not possible

  • SDO_IndexOutOfBoundsException - the numeric index into a data object, sequence or list is not in the valid range

  • SDO_UnsupportedOperationException - the request cannot be completed because it is not allowed, for example an attempt to set a read-only property.

Methoden

One method is added to those inherited from the built in Exception class:

  • getCause - get the cause of this SDO_Exception

SDO Reflection Application Programmer Interfaces

SDO_Model_ReflectionDataObject

The main interface used to reflect on a data object instance to obtain its model type and property information. It is designed to follow the reflection pattern introduced in PHP 5.

Konstruktor

  • __construct - construct a new SDO_Model_ReflectionDataObject.

Methoden

  • export - get a string describing the data object.

  • getType - get the SDO_Model_Type for the data object.

  • getInstanceProperties - get the instance properties of the data object.

  • getContainmentProperty - get the property which defines the containment relationship to the data object.

SDO_Model_Type

The interface through which a data object's type information can be retrieved. This interface can be used to find out the type name and namespace URI of the type, whether the type allow open content, and so on.

Methoden

SDO_Model_Property

The interface through which a data object's property information can be retrieved. This interface can be used to find out the type of a property, whether a property has a default value, whether the property is contained or reference by its parent, its cardinality, and so on.

Methoden

  • getName - get the name of the property.

  • getType - get the type of the property.

  • isMany - test to see if the property is many-valued.

  • isContainment - test to see if the property describes a containment relationship.

  • getContainingType - get the type which contains this property.

  • getDefault - get the default value for a property.

SDO Data Access Service Developer Interfaces

SDO_DAS_DataObject

The interface through which a Data Access Service can access a data object's SDO_DAS_ChangeSummary. The change summary is used by the Data Access Service to check for conflicts when applying changes back to a data souece.

Methoden