Commit | Line | Data |
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1 | use MooseX::Declare; |
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2 | |
3 | |
4 | class SQL::Abstract { |
5 | |
6 | use Carp qw/croak/; |
7 | use Data::Dump qw/pp/; |
8 | |
9 | use Moose::Util::TypeConstraints; |
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10 | use MooseX::Types -declare => [qw/NameSeparator/]; |
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11 | use MooseX::Types::Moose qw/ArrayRef Str Int HashRef CodeRef/; |
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12 | use MooseX::AttributeHelpers; |
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13 | use SQL::Abstract::Types qw/NameSeparator AST ArrayAST/; |
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14 | |
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15 | clean; |
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16 | |
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17 | our $VERSION = '2.000000'; |
18 | |
19 | our $AST_VERSION = '1'; |
20 | |
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21 | # Operator precedence for bracketing |
22 | our %PRIO = ( |
23 | and => 10, |
24 | or => 50 |
25 | ); |
26 | |
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27 | our %BINOP_MAP = ( |
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28 | '>' => '>', |
29 | '<' => '<', |
30 | '==' => '=', |
31 | '!=' => '!=', |
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32 | # LIKE is always "field LIKE <value>" |
33 | '-like' => 'IN', |
34 | '-not_like' => 'NOT LIKE', |
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35 | ); |
36 | |
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37 | has where_dispatch_table => ( |
38 | is => 'ro', |
39 | lazy_build => 1, |
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40 | isa => HashRef[CodeRef], |
41 | metaclass => 'Collection::ImmutableHash', |
42 | provides => { |
43 | get => 'lookup_where_dispatch' |
44 | } |
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45 | ); |
46 | |
47 | has binop_map => ( |
48 | is => 'ro', |
49 | lazy_build => 1, |
50 | isa => HashRef, |
51 | metaclass => 'Collection::ImmutableHash', |
52 | provides => { |
53 | exists => 'is_valid_binop', |
54 | get => 'binop_mapping', |
55 | keys => 'binary_operators' |
56 | } |
57 | ); |
58 | |
59 | sub _build_binop_map { return {%BINOP_MAP} }; |
60 | |
61 | method _build_where_dispatch_table { |
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62 | my $binop = $self->can('_binop') or croak "InternalError: $self can't do _binop!"; |
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63 | return { |
64 | map { $_ => $binop } $self->binary_operators |
65 | } |
66 | } |
67 | |
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68 | has ast_version => ( |
69 | is => 'ro', |
70 | isa => Int, |
71 | required => 1 |
72 | ); |
73 | |
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74 | has name_separator => ( |
75 | is => 'rw', |
76 | isa => NameSeparator, |
77 | default => sub { ['.'] }, |
78 | coerece => 1, |
79 | required => 1, |
80 | ); |
81 | |
82 | has list_separator => ( |
83 | is => 'rw', |
84 | isa => Str, |
85 | default => ', ', |
86 | required => 1, |
87 | ); |
88 | |
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89 | has binds => ( |
90 | isa => ArrayRef, |
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91 | is => 'ro', |
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92 | clearer => '_clear_binds', |
93 | lazy => 1, |
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94 | default => sub { [ ] }, |
95 | metaclass => 'Collection::Array', |
96 | provides => { |
97 | push => 'add_bind', |
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98 | } |
99 | ); |
100 | |
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101 | # TODO: once MXMS supports %args, use that here |
102 | method create(ClassName $class: Int $ver) { |
103 | croak "AST version $ver is greater than supported version of $AST_VERSION" |
104 | if $ver > $AST_VERSION; |
105 | |
106 | my $name = "${class}::AST::v$ver"; |
107 | Class::MOP::load_class($name); |
108 | |
109 | return $name->new(ast_version => $ver); |
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110 | } |
111 | |
112 | # Main entry point |
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113 | method generate(ClassName $class: AST $ast) { |
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114 | croak "SQL::Abstract AST version not specified" |
115 | unless ($ast->[0] eq '-ast_version'); |
116 | |
117 | my (undef, $ver) = splice(@$ast, 0, 2); |
118 | |
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119 | # TODO: once MXMS supports %args, use that here |
120 | my $self = $class->create($ver); |
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121 | |
122 | return ($self->dispatch($ast), $self->binds); |
123 | } |
124 | |
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125 | method reset() { |
126 | $self->_clear_binds(); |
127 | } |
128 | |
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129 | method dispatch (AST $ast) { |
130 | # I want multi methods! |
131 | my $tag; |
132 | if (is_ArrayAST($ast)) { |
133 | ($tag = $ast->[0]) =~ s/^-/_/; |
134 | } else { |
135 | $tag = "_" . $ast->{-type}; |
136 | } |
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137 | |
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138 | my $meth = $self->can($tag) || croak "Unknown tag '$tag'"; |
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139 | return $meth->($self, $ast); |
140 | } |
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141 | |
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142 | }; |