--- a/dummy_foundation/lib/XML/XQL/Plus.pm Wed Jun 03 18:33:51 2009 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,634 +0,0 @@
-############################################################################
-# Copyright (c) 1998 Enno Derksen
-# All rights reserved.
-# This program is free software; you can redistribute it and/or modify it
-# under the same terms as Perl itself.
-############################################################################
-#
-# Extra functionality that is not part of the XQL spec
-#
-
-package XML::XQL;
-use strict;
-
-BEGIN
-{
- die "don't use/require XML::XQL::Plus, either use/require XML::XQL or XML::XQL::Strict" unless $XML::XQL::Included;
-};
-
-defineComparisonOperators
-(
- "=~" => \&XML::XQL::match_oper,
- "!~" => \&XML::XQL::no_match_oper,
- "match" => \&XML::XQL::match_oper,
- "no_match" => \&XML::XQL::no_match_oper,
- "isa" => \&XML::XQL::isa_oper,
- "can" => \&XML::XQL::can_oper,
-);
-
-sub match_oper
-{
- my ($node, $expr) = @_;
-
- return [] if isEmptyList ($node);
-#?? can this happen?
-
- my $str = $node->xql_toString;
-
- $expr = prepareRvalue ($expr->solve ([$node]));
- return [] if isEmptyList ($expr);
-#?? can this happen?
-
- $expr = $expr->xql_toString;
- croak "bad search pattern '$expr' for =~" unless $expr =~ m!^\s*[m/]!o;
-
- my $res = eval "\$str =~ $expr";
- croak "bad search pattern '$expr' for =~ operator: $@" if ($@);
- $res;
-}
-
-sub no_match_oper
-{
- my ($node, $expr) = @_;
-
- return [] if isEmptyList ($node);
-#?? can this happen?
-
- my $str = $node->xql_toString;
-
- $expr = prepareRvalue ($expr->solve ([$node]));
- return [] if isEmptyList ($expr);
-#?? can this happen?
-
- $expr = $expr->xql_toString;
- croak "bad search pattern '$expr' for !~" unless $expr =~ m!^\s*[m/]!o;
-
- my $res = eval "\$str !~ $expr";
- croak "bad search pattern '$expr' for !~ operator: $@" if ($@);
- $res;
-}
-
-sub isa_oper
-{
- my ($node, $expr) = @_;
-
- return [] if isEmptyList ($node);
-#?? can this happen?
-
- $expr = prepareRvalue ($expr->solve ([$node]));
- return [] if isEmptyList ($expr);
-#?? can this happen?
-
- $expr = $expr->xql_toString;
-
- # Expand "number" to "XML::XQL::Number" etc.
- $expr = expandType ($expr);
-
-#?? I don't think empty lists are possible here. If so, add "[]" as expr
-
- ref($node) and $node->isa ($expr);
-}
-
-#
-# Not sure how useful this is, unless it supports XQL functions/methods...
-#
-sub can_oper
-{
- my ($node, $expr) = @_;
-
- return [] if isEmptyList ($node);
-#?? can this happen?
-
- $expr = prepareRvalue ($expr->solve ([$node]));
- return [] if isEmptyList ($expr);
-#?? can this happen?
-
- $expr = $expr->xql_toString;
-
- ref ($node) and $node->can ($expr);
-}
-
-sub once
-{
- my ($context, $list, $expr) = @_;
- $expr->solve ($context, $list);
-}
-
-sub xql_eval
-{
- my ($context, $list, $query, $type) = @_;
-
-# return [] if @$list == 0;
-
- $query = toList ($query->solve ($context, $list));
- return [] unless @$query;
-
- if (defined $type)
- {
- $type = prepareRvalue ($type->solve ($context, $list));
- $type = isEmptyList ($type) ? "Text" : $type->xql_toString;
-
- # Expand "number" to "XML::XQL::Number" etc.
- $type = expandType ($type);
- }
- else
- {
- $type = "XML::XQL::Text";
- }
-
- my @result = ();
- for my $val (@$query)
- {
- $val = $val->xql_toString;
- $val = eval $val;
-
-#print "eval result=$val\n";
-#?? check result?
- push @result, eval "new $type (\$val)" if defined $val;
- }
- \@result;
-}
-
-sub subst
-{
- my ($context, $list, $query, $expr, $repl, $mod, $mode) = @_;
-
-#?? not sure?
- return [] if @$list == 0;
-
- $expr = prepareRvalue ($expr->solve ($context, $list));
- return [] if isEmptyList ($expr);
- $expr = $expr->xql_toString;
-
- $repl = prepareRvalue ($repl->solve ($context, $list));
- return [] if isEmptyList ($repl);
- $repl = $repl->xql_toString;
-
- if (defined $mod)
- {
- $mod = prepareRvalue ($mod->solve ($context, $list));
- $mod = isEmptyList ($mod) ? "" : $mod->xql_toString;
- }
-
- if (defined $mode)
- {
- $mode = prepareRvalue ($mode->solve ($context, $list));
- $mode = isEmptyList ($mode) ? 0 : $mode->xql_toString;
- }
- else
- {
- $mode = 0; # default mode: use textBlocks for Elements
- }
-
- my @result = ();
- my $nodes = toList ($query->solve ($context, $list));
-
- for my $node (@$nodes)
- {
- if ($mode == 0 && $node->xql_nodeType == 1) # 1: Element node
- {
- # For Element nodes, replace text in consecutive text blocks
- # Note that xql_rawtextBlocks, returns the blocks in reverse order,
- # so that the indices of nodes within previous blocks don't need
- # to be adjusted when a replacement occurs.
- my $block_matched = 0;
- BLOCK: for my $block ($node->xql_rawTextBlocks)
- {
- my $str = $block->[2];
- my $result = eval "\$str =~ s/\$expr/\$repl/$mod";
- croak "bad subst expression s/$expr/$repl/$mod: $@" if ($@);
- next BLOCK unless $result;
-
- $block_matched++;
- $node->xql_replaceBlockWithText ($block->[0], $block->[1], $str);
- }
- # Return the input parameter only if a substitution occurred
- push @result, $node if $block_matched;
- }
- else
- {
- my $str = $node->xql_toString;
- next unless defined $str;
-
- my $result = eval "\$str =~ s/\$expr/\$repl/$mod";
- croak "bad subst expression s/$expr/$repl/$mod: $@" if ($@);
- next unless $result;
-#print "result=$result for str[$str] =~ s/$expr/$repl/$mod\n";
-
- # Return the input parameter only if a substitution occurred
- $node->xql_setValue ($str);
- push @result, $node;
- }
- # xql_setValue will actually change the value of the node for an Attr,
- # Text, CDataSection, EntityRef or Element
- }
- \@result;
-}
-
-#?? redo match - what should it return?
-sub match
-{
- my ($context, $list, $query, $repl, $mod) = @_;
-
- return [] if @$list == 0;
-
- $query = prepareRvalue ($query->solve ($context, $list));
- return [] if isEmptyList ($query);
- $query = $query->xql_toString;
-
- if (defined $mod)
- {
- $mod = prepareRvalue ($mod->solve ($context, $list));
- $mod = isEmptyList ($mod) ? "" : $mod->xql_toString;
- }
-
- my $str = $list->[0]->xql_toString;
- return [] unless defined $str;
-
- my (@matches) = ();
- eval "\@matches = (\$str =~ /\$query/$mod)";
- croak "bad match expression m/$query/$mod" if ($@);
-
-#?? or should I map undef to XML::XQL::Text("") ?
- @matches = map { defined($_) ? new XML::XQL::Text ($_) : [] } @matches;
- \@matches;
-}
-
-sub xql_map
-{
- my ($context, $list, $query, $code) = @_;
-
-#?? not sure?
- return [] if @$list == 0;
-
- $code = prepareRvalue ($code->solve ($context, $list));
- return [] if isEmptyList ($code);
- $code = $code->xql_toString;
-
- my @result = ();
- my $nodes = toList ($query->solve ($context, $list));
-
- for my $node (@$nodes)
- {
- my $str = $node->xql_toString;
- next unless defined $str;
-
- my (@mapresult) = ($str);
-
-#?? NOTE: the $code should
- eval "\@mapresult = map { $code } (\$str)";
- croak "bad map expression '$code' ($@)" if ($@);
-
- # Return the input parameter only if a change occurred
- next unless $mapresult[0] eq $str;
-
- # xql_setValue will actually change the value of the node for an Attr,
- # Text, CDataSection, EntityRef or Element
- $node->xql_setValue ($str);
- push @result, $node;
- }
- \@result;
-}
-
-sub xql_new
-{
- my ($type, @arg) = @_;
-
- # Expand "number" to "XML::XQL::Number" etc.
- $type = expandType ($type);
-
- my $obj = eval "new $type (\@arg)";
- $@ ? [] : $obj; # return empty list on exception
-}
-
-my $DOM_PARSER; # used by xql_document (below)
-sub setDocParser
-{
- $DOM_PARSER = shift;
-}
-
-sub xql_document
-{
- my ($docname) = @_;
- my $parser = $DOM_PARSER ||= new XML::DOM::Parser;
- my $doc;
- eval
- {
- $doc = $parser->parsefile ($docname);
- };
- if ($@)
- {
- warn "xql_document: could not read XML file [$docname]: $@";
- }
- return defined $doc ? $doc : [];
-}
-
-#----------- XQL+ methods --------------------------------------------
-
-
-sub DOM_nodeType
-{
- my ($context, $list) = @_;
-
- return [] if @$list == 0;
-
- new XML::XQL::Number ($list->[0]->xql_DOM_nodeType, $list->[0]);
-}
-
-#----------- Perl Builtin Functions ----------------------------------
-
-# Note that certain functions (like mkdir) are not considered "constant"
-# because we don't want their invocation values cached. (We want the
-# function to be called every time the Invocation is solved/evaluated.)
-my %PerlFunc =
-(
- # Format:
- # "funcName", => [ARGCOUNT, RETURN_TYPE [, CONSTANT = 0, [QUERY_ARG = 0]]]
-
- #-------- Arithmetic Functions
-
- "abs" => [1, "Number", 1],
- "atan2" => [2, "Number", 1, -1],
- "cos" => [1, "Number", 1],
- "exp" => [1, "Number", 1],
- "int" => [1, "Number", 1],
- "log" => [1, "Number", 1],
- "rand" => [[0, 1], "Number", 0, -1],
- "sin" => [1, "Number", 1],
- "sqrt" => [1, "Number", 1],
- "srand" => [[0, 1], "Number", 0, -1],
- "time" => [0, "Number", 0, -1],
-
- #-------- Conversion Functions
-
- "chr" => [1, "Text", 1],
-# "gmtime" => [1, "List of Number", 1],
- "hex" => [1, "Number", 1],
-# "localtime" => [1, "List of Number", 1],
- "oct" => [1, "Number", 1],
- "ord" => [1, "Text", 1],
- "vec" => [3, "Number", 1],
- "pack" => [[1, -1], "Text", 1, -1], #?? how should this work??
-# "unpack" => [2, "List of ?", 1],
-
- #-------- String Functions
-
- "chomp" => [1, "Text", 1],
- "chop" => [1, "Text", 1],
- "crypt" => [2, "Text", 1],
- "lindex" => [[2, 3], "Number", 1], # "index" is already taken by XQL
- "length" => [1, "Number", 1],
- "lc" => [1, "Text", 1],
- "lcfirst" => [1, "Text", 1],
- "quotemeta" => [1, "Text", 1],
- "rindex" => [[2, 3], "Number", 1],
- "substr" => [[2, 3], "Text", 1],
- "uc" => [1, "Text", 1],
- "ucfirst" => [1, "Text", 1],
- "reverse" => [1, "Text", 1],
- "sprintf" => [[1, -1], "Text", 1, -1],
-
- #-------- Array Functions
-
- "join" => [[1, -1], "Text", 1],
-# "split" => [[2, 3], "List of Text", 1],
-
- #-------- File Functions
-
- "chmod" => [2, "Boolean", 0, 1],
- "chown" => [3, "Boolean", 0, 2],
- "link" => [2, "Number", 0, -1], #?? no return value
-# "lstat" => [1, "List of Number"],
- "mkdir" => [2, "Boolean"], #?? or is 1 arg also allowed?
- "readlink" => [1, "Text"],
- "rename" => [2, "Boolean", 0, -1],
- "rmdir" => [1, "Boolean"],
-# "stat" => [1, "List of Number"],
- "symlink" => [2, "Boolean", 0, -1],
- "unlink" => [1, "Boolean"],
- "utime" => [3, "Boolean", 0, 2],
- "truncate" => [2, "Number"], #?? no return value
-
- #-------- System Interaction
-
- "exit" => [[0, 1], "Number"],
-# "glob" => [1, "List of Text"],
- "system" => [[1, -1], "Number", 0, -1],
-# "times" => [0, "List of Number"],
-
- #-------- Miscellaneous
-
- "defined" => [1, "Boolean"], # is this useful??
- "dump" => [[0, 1], "Number", 0, -1],
- "ref" => [1, "Text"],
-);
-#?? die, warn, croak (etc.),
-#?? file test (-X), tr// (same as y//)
-#?? array functions, sort
-
-# Generate wrapper for Perl builtin function on the fly
-sub generatePerlWrapper
-{
- my ($name) = @_;
- my $args = $PerlFunc{$name};
- return undef unless defined $args; # not found
-
- my ($argCount, $returnType, $const, $queryArg) = @$args;
- my $funcName = $name;
- if ($name eq "lindex") # "index" is already taken
- {
- $funcName = "index";
- }
- generateFunction ($name, $funcName, $returnType, $argCount, 0, $const,
- $queryArg);
- $Func{$name};
-}
-
-#?? Inline functions, do they make sense? E.g. 'elem!sub("code", "arg1")'
-#?? Normally, user should use defineFunction, but if most of them have
-#?? a lot of common code, I could provide the pre- and post-code.
-#?? After processing the user-supplied code block, how should I convert the
-#?? user's result back to an Invocation result. E.g. do I get a single value
-#?? or a list back?
-
-defineFunction ("eval", \&XML::XQL::xql_eval, [1, 2]);
-defineFunction ("subst", \&XML::XQL::subst, [3, 5], 1);
-defineFunction ("s", \&XML::XQL::subst, [3, 5], 1);
-defineFunction ("match", \&XML::XQL::match, [1, 2]);
-defineFunction ("m", \&XML::XQL::match, [1, 2]);
-defineFunction ("map", \&XML::XQL::xql_map, 2, 1);
-defineFunction ("once", \&XML::XQL::once, 1, 1);
-
-defineMethod ("DOM_nodeType", \&XML::XQL::DOM_nodeType, 0, 0);
-
-generateFunction ("new", "XML::XQL::xql_new", "*", [1, -1], 1, 0, 1);
-generateFunction ("document", "XML::XQL::xql_document", "*", 1, 1, 0, 0);
-
-# doc() is an alias for document()
-defineFunction ("doc", \&XML::XQL::xql_wrap_document, 1, 1);
-
-#------------------------------------------------------------------------------
-# The following functions were found in the XPath spec.
-
-# Found in XPath but not (yet) implemented in XML::XQL:
-# - type casting (string, number, boolean) - Not sure if needed...
-# Note that string() converts booleans to 'true' and 'false', but our
-# internal type casting converts it to perl values '0' and '1'...
-# - math (+,-,*,mod,div) - Use eval() for now
-# - last(), position() - Similar to end() and index() except they're 1-based
-# - local-name(node-set?), namespace-uri(node-set?)
-# - name(node-set?) - Can we pass a node-set in XQL?
-# - lang(string)
-
-sub xpath_concat { join ("", @_) }
-sub xpath_starts_with { $_[0] =~ /^\Q$_[1]\E/ }
-# ends-with is not part of XPath
-sub xpath_ends_with { $_[0] =~ /\Q$_[1]\E$/ }
-sub xpath_contains { $_[0] =~ /\Q$_[1]\E/ }
-
-# The following methods don't know about NaN, +/-Infinity or -0.
-sub xpath_floor { use POSIX; POSIX::floor ($_[0]) }
-sub xpath_ceiling { use POSIX; POSIX::ceil ($_[0]) }
-sub xpath_round { use POSIX; POSIX::floor ($_[0] + 0.5) }
-
-# Note that the start-index is 1-based in XPath
-sub xpath_substring
-{
- defined $_[2] ? substr ($_[0], $_[1] - 1, $_[2])
- : substr ($_[0], $_[1] - 1)
-}
-
-sub xpath_substring_before
-{
- my $i = index ($_[0], $_[1]);
- $i == -1 ? undef : substr ($_[0], 0, $i)
-}
-
-sub xpath_substring_after
-{
- my $i = index ($_[0], $_[1]);
- $i == -1 ? undef : substr ($_[0], $i + length($_[1]))
-}
-
-# Note that d,c,s are tr/// modifiers. Also can't use open delimiters i.e. {[(<
-my @TR_DELIMITERS = split //, "/!%^&*)-_=+|~]}'\";:,.>/?abefghijklmnopqrtuvwxyz";
-
-sub xpath_translate
-{
- my ($str, $from, $to) = @_;
-
- my $delim;
- for my $d (@TR_DELIMITERS)
- {
- if (index ($from, $d) == -1 && index ($to, $d) == -1)
- {
- $delim = $d;
- last;
- }
- }
- die "(xpath_)translate: can't find suitable 'tr' delimiter"
- unless defined $delim;
-
- # XPath defines that if length($from) > length($to), characters in $from
- # for which there is no match in $to, should be deleted.
- # (So we must use the 's' modifier.)
- eval "\$str =~ tr$delim$from$delim$to${delim}d";
- $str;
-}
-
-sub xpath_string_length
-{
- my ($context, $list, $text) = @_;
-
- if (defined $text)
- {
- $text = XML::XQL::prepareRvalue ($text->solve ($context, $list));
- return [] unless defined $text;
-
- return new XML::XQL::Number (length $text->xql_toString,
- $text->xql_sourceNode);
- }
- else
- {
- return [] if @$list == 0;
-
- my @result;
- for my $node (@$list)
- {
- push @result, new XML::XQL::Number (length $node->xql_toString,
- $node);
- }
- return \@result;
- }
-}
-
-sub _normalize
-{
- $_[0] =~ s/\s+/ /g;
- $_[0] =~ s/^\s+//;
- $_[0] =~ s/\s+$//;
- $_[0];
-}
-
-sub xpath_normalize_space
-{
- my ($context, $list, $text) = @_;
-
- return [] if @$list == 0;
-
- if (defined $text)
- {
- $text = XML::XQL::prepareRvalue ($text->solve ($context, $list));
- return [] unless defined $text;
-
- return new XML::XQL::Text (_normalize ($text->xql_toString),
- $text->xql_sourceNode);
- }
- else
- {
- my @result;
- for my $node (@$list)
- {
- push @result, new XML::XQL::Text (_normalize ($node->xql_toString),
- $node);
- }
- return \@result;
- }
-}
-
-sub xpath_sum
-{
- my ($context, $list, $expr) = @_;
-
- return [] if @$list == 0;
-#?? or return Number(0) ?
-
- my $sum = 0;
- $expr = XML::XQL::toList ($expr->solve ($context, $list));
- for my $r (@{ $expr })
- {
- $sum += $r->xql_toString;
- }
- return new XML::XQL::Number ($sum, undef);
-}
-
-generateFunction ("round", "XML::XQL::xpath_round", "Number", 1, 1);
-generateFunction ("floor", "XML::XQL::xpath_floor", "Number", 1, 1);
-generateFunction ("ceiling", "XML::XQL::xpath_ceiling", "Number", 1, 1);
-
-generateFunction ("concat", "XML::XQL::xpath_concat", "Text", [2, -1], 1);
-generateFunction ("starts-with", "XML::XQL::xpath_starts_with", "Boolean", 2, 1);
-generateFunction ("ends-with", "XML::XQL::xpath_ends_with", "Boolean", 2, 1);
-generateFunction ("contains", "XML::XQL::xpath_contains", "Boolean", 2, 1);
-generateFunction ("substring-before", "XML::XQL::xpath_substring_before", "Text", 2, 1);
-generateFunction ("substring-after", "XML::XQL::xpath_substring_after", "Text", 2, 1);
-# Same as Perl substr() except index is 1-based
-generateFunction ("substring", "XML::XQL::xpath_substring", "Text", [2, 3], 1);
-generateFunction ("translate", "XML::XQL::xpath_translate", "Text", 3, 1);
-
-defineMethod ("string-length", \&XML::XQL::xpath_string_length, [0, 1], 1);
-defineMethod ("normalize-space", \&XML::XQL::xpath_normalize_space, [0, 1], 1);
-
-defineFunction ("sum", \&XML::XQL::xpath_sum, 1, 1);
-
-1; # module return code