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1 package IMPL::DOM::Navigator;
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2 use strict;
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3 use warnings;
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4
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11
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5 use base qw(IMPL::Object);
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6 use IMPL::Class::Property;
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7 use IMPL::Class::Property::Direct;
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8 BEGIN {
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9 public _direct property Path => prop_get | owner_set;
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10 public _direct property Current => prop_get | owner_set;
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11 }
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12
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13 sub CTOR {
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14 my ($this,$CurrentNode) = @_;
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15
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16 $this->{$Current} = $CurrentNode or die IMPL::InvalidArgumentException("A starting node is a required paramater");
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17 }
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18
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11
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19 sub Navigate {
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20 my ($this,$query) = @_;
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21
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22 if ( my ($newNode) = $this->{$Current}->selectNodes($query) ) {
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23 push @{$this->{$Path}}, $this->{$Current};
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24 return $this->{$Current} = $newNode;
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25 } else {
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26 return undef;
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27 }
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28 }
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29
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11
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30 sub Back {
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31 my ($this) = @_;
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32
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33 if ( my $newNode = $this->{$Path} ? pop @{$this->{$Path}} : undef ) {
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34 return $this->{$Current} = $newNode;
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35 } else {
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36 return undef;
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37 }
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38 }
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39
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40 sub PathToString {
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41 my $this = shift;
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42
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43 join('/',map $_->nodeName, $this->{$Path} ? (@{$this->{$Path}}, $this->{$Current}) : $this->{$Current});
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44 }
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0
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45
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46 1;
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11
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47
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48 __END__
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49 =pod
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50
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51 =head1 DESCRIPTION
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52
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53 DOM .
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54
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55 =head1 METHODS
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56
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57 =over
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58
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59 =item C<$obj->new($nodeStart)>
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60
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61 .
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62
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63 =item C<$obj->Navigate($query)>
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64
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65 C<$query>.
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66 .
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67 , .
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68
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69 , C<undef>.
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70
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71 =item C<$obj->Back()>
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72
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73 , .
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74
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75 , C<undef>.
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76
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77 =back
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78
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79 =cut |
