## GdaServerOperation: individual nodes

GdaServerOperation: individual nodes — Getting information about parts (nodes) composing a path

## Stability Level

Stable, unless otherwise indicated

## Functions

GdaServerOperationNode * | gda_server_operation_get_node_info ()
gchar ** | gda_server_operation_get_root_nodes ()
GdaServerOperationNodeType | gda_server_operation_get_node_type ()
gchar * | gda_server_operation_get_node_parent ()
gchar * | gda_server_operation_get_node_path_portion ()

## Types and Values

enum | GdaServerOperationNodeType
enum | GdaServerOperationNodeStatus
| GdaServerOperationNode

## Description

To each part of a path is associated a node (as a GdaServerOperationNode structure). For example the "/TABLE_DEF_P/TABLE_NAME" path has two nodes, one associated to "/TABLE_DEF_P" and one to "/TABLE_DEF_P/TABLE_NAME". For more information about the path's format, see the `gda_server_operation_set_value_at()`'s documentation.

This API is designed to get information about all the nodes present in a GdaServerOperation object (refer to the `gda_server_operation_get_root_nodes()` function) and about each node of a path, and allows inspection of its contents. It is mainly reserved for database provider's implementations but can have its purpose outside of this scope.

## Functions

### gda_server_operation_get_node_info ()

    GdaServerOperationNode *
    gda_server_operation_get_node_info (GdaServerOperation *op,
                                        const gchar *path_format,
                                        ...);

Get information about the node identified by `path` . The returned GdaServerOperationNode structure can be copied but not modified; it may change or cease to exist if `op` changes

#### Parameters

op | a GdaServerOperation object |
path_format | a complete path to a node (starting with "/") as a format string, similar to `g_strdup_printf()`'s argument |
... | the arguments to insert into the format string |

#### Returns

a GdaServerOperationNode structure, or `NULL` if the node was not found.

[transfer none][allow-none]

### gda_server_operation_get_root_nodes ()

    gchar **
    gda_server_operation_get_root_nodes (GdaServerOperation *op);

Get an array of strings containing the paths of nodes situated at the root of `op` .

#### Parameters

op | a GdaServerOperation object |

#### Returns

a new array, which must be freed with `g_strfreev()`.

[transfer full]

### gda_server_operation_get_node_type ()

    GdaServerOperationNodeType
    gda_server_operation_get_node_type (GdaServerOperation *op,
                                        const gchar *path,
                                        GdaServerOperationNodeStatus *status);

Convenience function to get the type of a node.

#### Parameters

op | a GdaServerOperation object |
path | a complete path to a node (starting with "/") |
status | a place to store the status of the node, or `NULL`. | [allow-none]

#### Returns

the type of node, or GDA_SERVER_OPERATION_NODE_UNKNOWN if the node was not found

### gda_server_operation_get_node_parent ()

    gchar *
    gda_server_operation_get_node_parent (GdaServerOperation *op,
                                          const gchar *path);

Get the complete path to the parent of the node defined by `path`

#### Parameters

op | a GdaServerOperation object |
path | a complete path to a node (starting with "/") |

#### Returns

a new string or `NULL` if the node does not have any parent or does not exist.

[transfer full]

### gda_server_operation_get_node_path_portion ()

    gchar *
    gda_server_operation_get_node_path_portion
                                   (GdaServerOperation *op,
                                    const gchar *path);

Get the last part of `path`

#### Parameters

op | a GdaServerOperation object |
path | a complete path to a node (starting with "/") |

#### Returns

a new string, or `NULL` if an error occurred.

[transfer full]

## Types and Values

### enum GdaServerOperationNodeType

#### Members

GDA_SERVER_OPERATION_NODE_PARAMLIST |  |
GDA_SERVER_OPERATION_NODE_DATA_MODEL |  |
GDA_SERVER_OPERATION_NODE_PARAM |  |
GDA_SERVER_OPERATION_NODE_SEQUENCE |  |
GDA_SERVER_OPERATION_NODE_SEQUENCE_ITEM |  |
GDA_SERVER_OPERATION_NODE_DATA_MODEL_COLUMN |  |
GDA_SERVER_OPERATION_NODE_UNKNOWN |  |

### enum GdaServerOperationNodeStatus

#### Members

GDA_SERVER_OPERATION_STATUS_OPTIONAL |  |
GDA_SERVER_OPERATION_STATUS_REQUIRED |  |
GDA_SERVER_OPERATION_STATUS_UNKNOWN |  |

### GdaServerOperationNode

    typedef struct {
    	GdaServerOperationNodeType    type;
    	GdaServerOperationNodeStatus  status;

    	GdaSet                       *plist;
    	GdaDataModel                 *model;
    	GdaColumn                    *column;
    	GdaHolder                    *param;
    	gpointer                      priv;
    } GdaServerOperationNode;

## See Also

GdaServerOperation