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author | William Joye <wjoye@cfa.harvard.edu> | 2019-02-15 18:19:17 (GMT) |
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committer | William Joye <wjoye@cfa.harvard.edu> | 2019-02-15 18:19:17 (GMT) |
commit | b863b050cd0148499e6725724829e066890f518c (patch) | |
tree | 7828a9e8d84da3f73abe446fc50a9c0b0c11528a /tcllib/support/devel/sak/registry/registry.man | |
parent | 7f1623e3f658b2dc4ddad0f1b9309a156de82065 (diff) | |
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update tcllib
Diffstat (limited to 'tcllib/support/devel/sak/registry/registry.man')
-rw-r--r-- | tcllib/support/devel/sak/registry/registry.man | 171 |
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diff --git a/tcllib/support/devel/sak/registry/registry.man b/tcllib/support/devel/sak/registry/registry.man new file mode 100644 index 0000000..d895164 --- /dev/null +++ b/tcllib/support/devel/sak/registry/registry.man @@ -0,0 +1,171 @@ +[comment {-*- tcl -*- doctools manpage}] +[manpage_begin pregistry n 0.1] +[copyright {2006 Andreas Kupries <andreas_kupries@users.sourceforge.net>}] +[moddesc {Registry like data store}] +[titledesc {Registry like data store}] +[require Tcl 8.3] +[require pregistry [opt 0.1]] +[description] +[para] + +This package provides a class for the creation of registry-like data +storage objects. The contents of each storage are organized in a tree, +with each node managing a set of children and attributes, each +possibly empty. Stores are not persistent by default, but can be made +so through configuring them with a tie backend to talk to. + + +[section {Class API}] + +The package exports a single command, the class command, enabling the +creation of registry instances. Its API is: + +[list_begin definitions] + +[call [cmd ::pregistry] [arg object] [arg options]...] + +This command creates a new registry object with the name [arg object], +initializes it, and returns the fully qualified name of the object +command as its result. + +[para] + +The recognized options are explained in section [sectref OPTIONS]. + +[list_end] + +[section {Object API}] + +The objects created by the class command provide the methods listed below: + +[list_begin definitions] +[call [arg object] [method delete] [arg key] [opt [arg attr]]] + +If the optional [arg attr] argument is present, the specified +attribute under [arg key] will be deleted from the object. + +If the optional [arg attr] is omitted, the specified [arg key] and any +subkeys or attributes beneath it in the hierarchy will be deleted. If +the key could not be deleted then an error is generated. If the key +did not exist, the command has no effect. + +The command returns the empty string as its result. + + +[call [arg object] [method mtime] [arg key] [opt [arg attr]]] + +If the optional [arg attr] argument is present, the time of the last +modification of the specified attribute under [arg key] will be +returned, in seconds since the epoch. + +If the optional [arg attr] is omitted, the time of the last +modification of the specified [arg key] will be returned. + +If the key did not exist, the command will generate an error. + + +[call [arg object] [method exists] [arg key] [opt [arg attr]]] + +If the optional [arg attr] argument is present, the method checks +whether the specified attribute under [arg key] is present or not. + +If the optional [arg attr] is omitted, the method checks whether the +specified [arg key] is present or not. + +In both cases the result returned is boolean value, [const True] if +the checked entity exists, and [const False] otherwise. + + +[call [arg object] [method get] [arg key] [arg attr]] + +Returns the data associated with the attribute [arg attr] under the +[arg key]. If either the key or the attribute does not exist, then an +error is generated. + + +[call [arg object] [method get||default] [arg key] [arg attr] [arg default]] + +Like method [method get], except that the [arg default] is returned if +either the key or the attribute does not exist, instead of generating +an error. + + +[call [arg object] [method keys] [arg key] [opt [arg pattern]]] + +If [arg pattern] isn't specified, the command returns a list of names +of all the subkeys of [arg key]. If [arg pattern] is specified, only +those names matching the pattern are returned. Matching is determined +using the same rules as for [cmd {string match}]. If the specified +[arg key] does not exist, then an error is generated. + + +[call [arg object] [method set] [arg key] [opt "[arg attr] [arg value]"]] + +If [arg attr] isn't specified, creates the [arg key] if it doesn't +already exist. If [arg attr] is specified, creates the [arg key] +keyName and attribute [arg attr] if necessary. + +The contents of [arg attr] are set to [arg value]. The command returns +the [arg value] as its result. + + +[call [arg object] [method attrs] [arg key] [opt [arg pattern]]] + +If [arg pattern] isn't specified, returns a list of names of all the +attributes of [arg key]. If [arg pattern] is specified, only those +names matching the pattern are returned. Matching is determined using +the same rules as for [cmd {string match}]. + + + +[call [arg object] [method configure]] + +Returns a dictionary mapping the option of the object to their +currently configured values. + +[call [arg object] [method configure] [arg option] [arg newvalue]...] + +This invokation sets the configured value of option [arg option] to +[arg newvalue]. Nothing will be done if current and new value are +identical. Returns the empty string. + +[call [arg object] [method configure] [arg option]] +[call [arg object] [method cget] [arg option]] + +Returns the value configured for the specified option [arg option]. + +[list_end] + + +[section KEYS] + +All elements in the registry are identified by a unique key, which is +a list of strings. This identifies the path from the root of the tree +to the requested element. The root itself is identified by the empty +list. Each child C of an element E have to have unique name, which +will be the last element of the key identifying this child. The head +of the key will be the key of E. + + +[section OPTIONS] + +The registry object recognize a single option, + +[list_begin options] +[opt_def -tie tiedefinition] + +See the documentation of command [cmd ::tie::tie], in the package +[package tie]. The value of the option is a list of words equivalent +to the arguments "[arg dstype] [arg dsname]..." of [cmd ::tie::tie]. +I.e. the identity of the tie backend to use, followed by the +specification of the location to use, per the chosen backend. + +Example: +[example { + set r [pregistry %AUTO% -tie [list file $path]] +}] + +[list_end] + +[keywords registry {data store} tree] +[manpage_end] |