tdom-procs.tcl

Procedures to make parsing XML using TDOM a little easier

Location:
packages/acs-tcl/tcl/tdom-procs.tcl
Created:
2004/10/19
Author:
avni@ucla.edu <AK>
CVS Identification:
$Id: tdom-procs.tcl,v 1.6 2024/09/11 06:15:48 gustafn Exp $

Procedures in this file

Detailed information

tdom::get_attribute_value (public)

 tdom::get_attribute_value node_object attribute_name [ default_value ]

Returns the value of the attribute specified

Parameters:
node_object (required)
attribute_name (required)
default_value (optional)

Partial Call Graph (max 5 caller/called nodes):
%3

Testcases:
No testcase defined.

tdom::get_node_object (public)

 tdom::get_node_object parent_node_object [ args... ]

Returns a tDOM object to the args given If the tDOM object doesn't exist or the value is null, return null

    Example -----------------------------------------------------
    XML:     <experiment>
                 <experimenter>
                     <first-name>Annabelle Lee</first-name>
                     <last-name>Poe</last-name>
                 </experimenter>
             </experiment>
    Params:  parent_node_object=$tdom_experiment_object
             args=experimenter experimenter_two
    Returns: TDOM object for experimenter node
    End Example -------------------------------------------------
    

Parameters:
parent_node_object (required)

Partial Call Graph (max 5 caller/called nodes):
%3

Testcases:
No testcase defined.

tdom::get_node_xml (public)

 tdom::get_node_xml node_object

Returns xml of the data pointed to by the node object If tag doesn't exist or the value is null, returns null

Parameters:
node_object (required)

Partial Call Graph (max 5 caller/called nodes):
%3

Testcases:
No testcase defined.

tdom::get_parent_node_object (public)

 tdom::get_parent_node_object child_node_object

Returns a tDOM object for the parent node of the child node object passed in

Parameters:
child_node_object (required)

Partial Call Graph (max 5 caller/called nodes):
%3

Testcases:
No testcase defined.

tdom::get_tag_value (public)

 tdom::get_tag_value node_object [ args... ]

Returns the tag value of the tag_name passed in If tag doesn't exist or the value is null, returns null

    Example -----------------------------------------------------
    XML:     <experiment-id>1222</experiment-id>
    Params:  node_object=$document
             args=experiment-id EXPERIMENT-ID
    Returns: 1222
    End Example -------------------------------------------------
    

Parameters:
node_object (required)

Partial Call Graph (max 5 caller/called nodes):
%3

Testcases:
No testcase defined.
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Content File Source

# /packages/acs-tcl/tcl/tdom-procs.tcl

ad_library {

    Procedures to make parsing XML using
    TDOM a little easier


    @author avni@ucla.edu (AK)
    @creation-date 2004/10/19
    @cvs-id $Id: tdom-procs.tcl,v 1.6 2024/09/11 06:15:48 gustafn Exp $

    @tdom::get_node_object
    @tdom::get_parent_node_object
    @tdom::get_tag_value
    @tdom::get_attribute_value
    @tdom::get_node_xml

}

namespace eval tdom {}

d_proc -public tdom::get_node_object {
    parent_node_object
    args
} {
    Returns a tDOM object to the args given
    If the tDOM object doesn't exist or the value is null, return null

    <pre>
    Example -----------------------------------------------------
    XML:     &lt;experiment&gt;
                 &lt;experimenter&gt;
                     &lt;first-name&gt;Annabelle Lee&lt;/first-name&gt;
                     &lt;last-name&gt;Poe&lt;/last-name&gt;
                 &lt;/experimenter&gt;
             &lt;/experiment&gt;
    Params:  parent_node_object=$tdom_experiment_object
             args=experimenter experimenter_two
    Returns: TDOM object for experimenter node
    End Example -------------------------------------------------
    </pre>
} {
    # Do a loop for the args. The first non null result is returned
    set node_object ""
    foreach node_name $args {
        catch {set node_object [$parent_node_object getElementsByTagName "$node_name"]}
        if {$node_object ne "" } {
            return $node_object
        }
    }

    return $node_object
}

d_proc -public tdom::get_parent_node_object {
    child_node_object
} {
    Returns a tDOM object for the parent node of the child node object passed in
} {
    set parent_node_object ""
    catch {set parent_node_object [$child_node_object parentNode]}

    return $parent_node_object
}

d_proc -public tdom::get_tag_value {
    node_object
    args
} {
    Returns the tag value of the tag_name passed in
    If tag doesn't exist or the value is null, returns null

    <pre>
    Example -----------------------------------------------------
    XML:     &lt;experiment-id&gt;1222&lt;/experiment-id&gt;
    Params:  node_object=$document
             args=experiment-id EXPERIMENT-ID
    Returns: 1222
    End Example -------------------------------------------------
    </pre>
} {
    # Do a loop for the args. The first non null result is returned
    set tag_value ""

    foreach tag_name $args {
        catch {set tag_value [[$node_object getElementsByTagName "$tag_name"] text]} errormsg
        if {[string trim $tag_value] ne "" } {
            return $tag_value
        }
    }

    return $tag_value
}

d_proc -public tdom::get_attribute_value {
    node_object
    attribute_name
    {default_value ""}
} {
    Returns the value of the attribute specified
} {
    set attribute_value ""
    catch {set attribute_value [$node_object getAttribute $attribute_name $default_value]}

    return [string trim $attribute_value]
}

d_proc -public tdom::get_node_xml {
    node_object
} {
    Returns xml of the data pointed to by the node object
    If tag doesn't exist or the value is null, returns null
} {
    set node_xml ""
    catch {set node_xml [$node_object asXML]}

    return [string trim $node_xml]
}
# Local variables:
#    mode: tcl
#    tcl-indent-level: 4
#    indent-tabs-mode: nil
# End: