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|
;+
; NAME:
; NCDF_Container
;
; PURPOSE:
;
; This is a beefed-up IDL_CONTAINER object written as a utility object
; for the NCDF_FILE object and related objects. In particular, two new
; container methods have been added. The FindByID method searches container
; objects by object ID, and the FindByName method searches container object
; by object name. If found, the object reference is returned. This object
; is a subclassed IDL_CONTAINER object and uses the IDL_CONTAINER
; initialization routine.
;
; AUTHOR:
;
; FANNING SOFTWARE CONSULTING
; David Fanning, Ph.D.
; 1645 Sheely Drive
; Fort Collins, CO 80526 USA
; Phone: 970-221-0438
; E-mail: david@idlcoyote.com
; Coyote's Guide to IDL Programming: http://www.idlcoyote.com
;
; CATEGORY:
;
; Utilities
;
; CALLING SEQUENCE:
;
; ncdf_container = NCDF_Container()
;
; ARGUMENTS:
;
; Those used in the IDL_CONTAINER method.
;
; RETURN VALUE:
;
; A sub-classed IDL_Container object.
;
; NOTES:
;
; The program is designed to work with the NCDF_FILE object and related programs.
;
; MODIFICATION HISTORY:
;
; Written by: David W. Fanning, 3 February 2010.
;-
;******************************************************************************************;
; Copyright (c) 2010, by Fanning Software Consulting, Inc. ;
; All rights reserved. ;
; ;
; Redistribution and use in source and binary forms, with or without ;
; modification, are permitted provided that the following conditions are met: ;
; ;
; * Redistributions of source code must retain the above copyright ;
; notice, this list of conditions and the following disclaimer. ;
; * Redistributions in binary form must reproduce the above copyright ;
; notice, this list of conditions and the following disclaimer in the ;
; documentation and/or other materials provided with the distribution. ;
; * Neither the name of Fanning Software Consulting, Inc. nor the names of its ;
; contributors may be used to endorse or promote products derived from this ;
; software without specific prior written permission. ;
; ;
; THIS SOFTWARE IS PROVIDED BY FANNING SOFTWARE CONSULTING, INC. ''AS IS'' AND ANY ;
; EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES ;
; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT ;
; SHALL FANNING SOFTWARE CONSULTING, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, ;
; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED ;
; TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; ;
; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ;
; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ;
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ;
; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ;
;******************************************************************************************;
;*****************************************************************************************************
;
; NAME:
; NCDF_Container::FindByID
;
; PURPOSE:
;
; This method searches the IDL container object to find objects with a particular ID.
; If found, the object reference to that object is returned.
;
; SYNTAX:
;
; object = container -> FindByID( searchID )
;
; ARGUMENTS:
;
; searchID: The ID or identifier of the object you are searching for in
; this container (Required)
;
; KEYWORDS:
;
; COUNT: Set this keyword to a named variable that upon exit will contain the number
; of objects returned that meet the searchName description. (Output)
;
;*****************************************************************************************************
FUNCTION NCDF_Container::FindByID, thisID, COUNT=count
; Return to caller on error.
ON_ERROR, 2
; Assume there are no matches.
count = 0
; ID name must be a scalar.
IF N_Elements(thisID) NE 1 THEN Message, 'The search ID must be a scalar.'
; Get the IDs of all the child objects.
children = self -> IDL_CONTAINER::Get (/All, Count=numChildren)
IF numChildren EQ 0 THEN RETURN, Obj_New()
ids = LonArr(numChildren)
FOR childNo = 0L, numChildren - 1 DO BEGIN
IF Obj_HasMethod(children[childNo], 'GetID') THEN BEGIN
ids[childNo] = children[childNo] -> GetID()
ENDIF
ENDFOR
; Can you find this ID is the ID list?
index = Where(ids EQ thisID, count)
CASE count OF
0: RETURN, Obj_New()
1: index = index[0]
ELSE:
ENDCASE
; Get the matching objects.
IF count GT 0 THEN BEGIN
matchingObjects = self -> Get(POSITION=matches)
ENDIF ELSE matchingObjects = Obj_New()
RETURN, matchingObjects
END
;*****************************************************************************************************
;
; NAME:
; NCDF_Container::FindByName
;
; PURPOSE:
;
; This method searches the IDL container object to find objects with a particular name.
; If found, the object reference to that object is returned.
;
; SYNTAX:
;
; indices = container -> FindByName( searchName )
;
; ARGUMENTS:
;
; searchName: The string name of the object you are searching for in
; this container (Required)
;
; KEYWORDS:
;
; CASE_SENSITIVE: Set this keyword to 1 to indicate a case-sensitive search. By default, the
; search is case-insensitive.
;
; COUNT: Set this keyword to a named variable that upon exit will contain the number
; of objects returned that meet the searchName description. (Output)
;
; REGEXP: Set this keyword to 1 to indicate the searchName is a regular expression.
;
; _EXTRA: Any keywords supported by STREGEX can also be used. Requires REGEXP to be set.
;
;
;*****************************************************************************************************
FUNCTION NCDF_Container::FindByName, searchName, $
Case_Sensitive=case_sensitive, $
Count=count, $
RegExp=regexp, $
_Extra=extra
; Return to caller on error.
ON_ERROR, 2
; Assume there are no matches.
count = 0
; Search name must be a scalar.
IF N_Elements(searchName) NE 1 THEN Message,'Search expression must be a scalar string.'
; Get the names of all the child objects.
children = self -> IDL_CONTAINER::Get (/All, Count=numChildren)
IF numChildren EQ 0 THEN RETURN, Obj_New()
; We assume we can get the NAME as a property.
names = StrArr(numChildren)
FOR childNo = 0L, numChildren - 1 DO BEGIN
names[childNo] = children[childNo] -> GetProperty('NAME')
ENDFOR
; Does the user want to evaluate a regular expression?
; If not, do a simple search for the search name.
fold_case = Keyword_Set(case_sensitive) EQ 0
IF Keyword_Set (regexp) THEN BEGIN
mask = StRegex(names, searchName, FOLD_CASE=fold_case, /BOOLEAN, _Extra=extra)
ENDIF ELSE BEGIN
mask = StrMatch(names, searchName, FOLD_CASE=fold_case)
ENDELSE
; Transform boolean array to index array. A side effect is that
; the count value will be set.
matches = Where(mask, count)
IF N_Elements(matches) EQ 1 THEN matches = matches[0]
; Get the matching objects.
IF count GT 0 THEN BEGIN
matchingObjects = self -> Get(POSITION=matches)
ENDIF ELSE matchingObjects = Obj_New()
RETURN, matchingObjects
END
PRO NCDF_Container__DEFINE, class
class = { NCDF_CONTAINER, INHERITS IDL_CONTAINER }
END
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