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165
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1 package IMPL::SQL::Schema::Traits;
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49
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2 use strict;
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163
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3 use IMPL::_core::version;
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4 use IMPL::Exception();
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5
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165
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6 use parent qw(IMPL::Object);
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7 use IMPL::Code::Loader();
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8
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168
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9 # required for use with typeof operator
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10 use IMPL::SQL::Schema::Constraint::PrimaryKey();
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11 use IMPL::SQL::Schema::Constraint::Index();
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12 use IMPL::SQL::Schema::Constraint::Unique();
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13 use IMPL::SQL::Schema::Constraint::ForeignKey();
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14
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164
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15 ###################################################
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16
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165
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17 package IMPL::SQL::Schema::Traits::Table;
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18 use base qw(IMPL::Object::Fields);
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163
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19
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164
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20 use fields qw(
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21 name
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22 columns
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23 constraints
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24 options
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25 );
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26
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27 sub CTOR {
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28 my ($this,$table,$columns,$constraints,$options) = @_;
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29
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165
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30 $this->{name} = $table or die new IMPL::InvalidArgumentException(table => "A table name is required");
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31 $this->{columns} = $columns if defined $columns;
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32 $this->{constraints} = $constraints if defined $constraints;
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33 $this->{options} = $options if defined $options;
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164
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34 }
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35
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36 ###################################################
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37
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165
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38 package IMPL::SQL::Schema::Traits::Column;
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39 use base qw(IMPL::Object::Fields);
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164
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40
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41 use fields qw(
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42 name
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43 type
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44 isNullable
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45 defaultValue
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46 tag
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47 );
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48
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49 sub CTOR {
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50 my ($this, $name, $type, %args) = @_;
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51
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52 $this->{name} = $name or die new IMPL::InvalidArgumentException("name");
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53 $this->{type} = $type or die new IMPL::InvalidArgumentException("type");
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54 $this->{isNullable} = $args{isNullable} if exists $args{isNullable};
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55 $this->{defaultValue} = $args{defaultValue} if exists $args{defaultValue};
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56 $this->{tag} = $args{tag} if exists $args{tag};
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57 }
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58
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59 ##################################################
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60
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165
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61 package IMPL::SQL::Schema::Traits::Constraint;
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62 use base qw(IMPL::Object::Fields);
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63
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164
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64 use fields qw(
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65 name
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66 columns
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67 );
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68
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69 sub CTOR {
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70 my ($this, $name, $columns) = @_;
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71
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72 $this->{name} = $name;
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73 $this->{columns} = $columns; # list of columnNames
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74 }
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75
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76 sub constraintClass {
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77 die new IMPL::NotImplementedException();
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164
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78 }
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79
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80 ##################################################
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81
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165
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82 package IMPL::SQL::Schema::Traits::PrimaryKey;
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83
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84 use base qw(IMPL::SQL::Schema::Traits::Constraint);
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85
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86 __PACKAGE__->PassThroughArgs;
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87
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168
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88 use constant { constraintClass => typeof IMPL::SQL::Schema::Constraint::PrimaryKey };
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89
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164
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90 ##################################################
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91
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165
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92 package IMPL::SQL::Schema::Traits::Index;
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164
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93
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165
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94 use base qw(IMPL::SQL::Schema::Traits::Constraint);
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95
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96 __PACKAGE__->PassThroughArgs;
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97
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168
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98 use constant { constraintClass => typeof IMPL::SQL::Schema::Constraint::Index };
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99
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164
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100 ##################################################
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101
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165
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102 package IMPL::SQL::Schema::Traits::Unique;
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164
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103
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165
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104 use base qw(IMPL::SQL::Schema::Traits::Constraint);
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164
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105
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106 __PACKAGE__->PassThroughArgs;
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107
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108 use constant { constraintClass => typeof IMPL::SQL::Schema::Constraint::Unique };
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109
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164
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110 ##################################################
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111
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165
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112 package IMPL::SQL::Schema::Traits::ForeignKey;
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164
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113
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165
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114 use base qw(IMPL::SQL::Schema::Traits::Constraint);
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164
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115 use fields qw(
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116 foreignTable
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117 foreignColumns
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118 );
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119
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120 use constant { constraintClass => typeof IMPL::SQL::Schema::Constraint::ForeignKey };
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121
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122 our %CTOR = (
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123 'IMPL::SQL::Schema::Traits::Constraint' => sub { @_[0..1] }
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124 );
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125
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126 sub CTOR {
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127 my ($this,$foreignTable,$foreignColumns) = @_[0,3,4];
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128
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129 $this->{foreignTable} = $foreignTable;
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130 $this->{foreignColunms} = $foreignColumns;
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131 }
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132
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133
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134 ##################################################
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135
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165
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136 package IMPL::SQL::Schema::Traits::CreateTable;
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164
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137
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165
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138 use parent qw(-norequire IMPL::SQL::Schema::Traits);
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164
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139 use IMPL::Class::Property;
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140 use IMPL::lang;
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141
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142 BEGIN {
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143 public property table => prop_get | owner_set;
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144 }
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145
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146 sub CTOR {
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147 my ($this,$table) = @_;
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148
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149 die new IMPL::InvalidArgumentException("table", "An object of IMPL::SQL::Schema::Traits::Table type is required")
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150 unless is $table, typeof IMPL::SQL::Schema::Traits::Table;
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164
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151
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152 $this->table($table);
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153 }
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154
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155 sub apply {
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156 my ($this,$schema) = @_;
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157
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158 return 0 if ( $schema->GetTable( $this->table->{name} ) );
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159
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160 $schema->AddTable($this->table);
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161 return 1;
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162 }
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163
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164 ##################################################
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165
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165
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166 package IMPL::SQL::Schema::Traits::DropTable;
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167 use parent qw(-norequire IMPL::SQL::Schema::Traits);
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164
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168 use IMPL::Class::Property;
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169
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170 BEGIN {
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171 public property tableName => prop_get | owner_set;
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172 }
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173
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174 sub CTOR {
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175 my ($this,$tableName) = @_;
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176
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177 $this->tableName($tableName) or die new IMPL::InvalidArgumentException("tableName is required");
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178 }
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179
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180 sub apply {
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181 my ($this,$schema) = @_;
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182
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183 return 0 if $schema->GetTable( $this->tableName );
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184
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185 $schema->RemoveTable($this->tableName);
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186
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187 return 1;
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188 }
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189
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190 ##################################################
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191
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165
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192 package IMPL::SQL::Schema::Traits::RenameTable;
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193 use parent qw(-norequire IMPL::SQL::Schema::Traits);
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163
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194 use IMPL::Class::Property;
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195
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196 BEGIN {
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164
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197 public property tableName => prop_get | owner_set;
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198 public property tableNewName => prop_get | owner_set;
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199 }
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200
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201 sub CTOR {
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202 my ($this, $oldName, $newName) = @_;
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203
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204 $this->tableName($oldName) or die new IMPL::InvalidArgumentException("A table name is required");
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205 $this->tableNewName($newName) or die new IMPL::InvalidArgumentException("A new table name is required");
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206 }
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207
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208 sub apply {
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209 my ($this,$schema) = @_;
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210
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211 return 0 if not $schema->GetTable($this->tableName) or $schema->GetTable($this->tableNewName);
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212
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213 $this->RenameTable($this->tableName, $this->tableNewName);
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214
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215 return 1;
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216 }
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217
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218 #################################################
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219
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165
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220 package IMPL::SQL::Schema::Traits::AlterTableAddColumn;
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221 use parent qw(-norequire IMPL::SQL::Schema::Traits);
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164
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222 use IMPL::Class::Property;
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223 use IMPL::lang;
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224
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225 BEGIN {
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226 public property tableName => prop_get | owner_set;
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227 public property column => prop_get | owner_set;
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228 }
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229
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164
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230 sub CTOR {
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231 my ($this,$tableName,$column) = @_;
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232
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233 $this->tableName($tableName) or die new IMPL::InvalidArgumentException("A table name is required");
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234
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235 die new IMPL::InvalidArgumentException("A column should be a IMPL::SQL::Schema::Traits::Column object")
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236 unless is $column, typeof IMPL::SQL::Schema::Traits::Column;
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237
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238 $this->column($column);
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239 }
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240
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241 sub apply {
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242 my ($this,$schema) = @_;
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243
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244 my $table = $schema->GetTable($this->tableName) or return 0;
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245
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246 return 0 if $table->GetColumn( $this->column->{name} );
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247
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248 $table->AddColumn($this->column);
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249
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250 return 1;
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251 }
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252
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253 #################################################
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254
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255 package IMPL::SQL::Schema::Traits::AlterTableDropColumn;
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256 use parent qw(-norequire IMPL::SQL::Schema::Traits);
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257 use IMPL::Class::Property;
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258
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259 BEGIN {
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260 public property tableName => prop_get | owner_set;
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261 public property columnName => prop_get | owner_set;
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262 }
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263
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264 sub CTOR {
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265 my ($this,$table,$column) = @_;
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266
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267 $this->tableName($table) or die new IMPL::InvalidArgumentException(tableName => "A table name should be specified");
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268 $this->columnName($column) or die new IMPL::InvalidArgumentException(columnName => "A column name should be specified");
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269 }
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270
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271 sub apply {
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272 my ($this,$schema) = @_;
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273
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274 local $@;
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275
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276 return eval {
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277 $schema->GetTable($this->tableName)->RemoveColumn($this->columnName);
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278 return 1;
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279 } || 0;
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49
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280 }
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281
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164
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282 #################################################
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163
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283
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165
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284 package IMPL::SQL::Schema::Traits::AlterTableChangeColumn;
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285 use parent qw(-norequire IMPL::SQL::Schema::Traits);
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164
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286 use IMPL::Class::Property;
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287
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164
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288 BEGIN {
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289 public property tableName => prop_get | owner_set;
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290 public property columnName => prop_get | owner_set;
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168
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291 public property columnType => prop_all;
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292 public property defaultValue => prop_all;
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293 public property isNullable => prop_all;
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294 public property options => prop_all; # hash diff format, (keys have a prefix '+' - add or update value, '-' remove value)
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164
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295 }
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296
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164
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297 sub CTOR {
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298 my ($this, $table,$column,%args) = @_;
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299
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300 $this->tableName($table) or die new IMPL::InvalidArgumentException(tableName => "A table name is required");
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301 $this->columnName($column) or die new IMPL::InvalidArgumentException(columnName => "A column name is required");
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302
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303 $this->$_($args{$_})
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304 for (grep exists $args{$_}, qw(columnType defaultValue isNullable options));
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305 }
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306
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164
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307 sub apply {
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308 my ($this,$schema) = @_;
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309
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310 local $@;
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311
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312 return eval {
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313 my $column = $schema->GetTable($this->tableName)->GetColumn($this->columnName);
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168
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314 $column->SetType($this->columnType) if defined $this->columnType;
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315 $column->SetNullable($this->isNullable) if defined $this->isNullable;
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316 $column->SetDefaultValue($this->defaultValue) if defined $this->defaultValue;
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317 $column->SetOptions($this->options) if defined $this->options;
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164
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318
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319 return 1;
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320 } || 0;
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321 }
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322
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164
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323 #################################################
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163
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324
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165
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325 package IMPL::SQL::Schema::Traits::AlterTableAddConstraint;
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326 use parent qw(-norequire IMPL::SQL::Schema::Traits);
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164
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327 use IMPL::Class::Property;
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328 use IMPL::lang;
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329
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164
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330 BEGIN {
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331 public property tableName => prop_get | owner_set;
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332 public property constraint => prop_get | owner_set;
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333 }
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334
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164
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335 sub CTOR {
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336 my ($this,$table,$constraint) = @_;
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337
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338 $this->tableName($table) or die new IMPL::InvalidArgumentException( tableName => "A table name is required");
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339
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165
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340 die new IMPL::InvalidArgumentException(constaraint => "A valid IMPL::SQL::Schema::Traits::Constarint is required")
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341 unless is $constraint, typeof IMPL::SQL::Schema::Traits::Constraint;
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164
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342
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343 $this->constraint($constraint);
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344 }
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49
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345
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164
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346 sub apply {
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347 my ($this,$schema) = @_;
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348
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349 local $@;
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350
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351 return eval {
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168
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352 $schema->GetTable($this->tableName)->AddConstraint($this->constraint->constraintClass, $this->constraint);
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164
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353 return 1;
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354 } || 0;
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355
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356 }
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49
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357
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164
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358 #################################################
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49
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359
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165
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360 package IMPL::SQL::Schema::Traits::AlterTableDropConstraint;
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361 use parent qw(-norequire IMPL::SQL::Schema::Traits);
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164
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362 use IMPL::Class::Property;
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363
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364 BEGIN {
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365 public property tableName => prop_get | owner_set;
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366 public property constraintName => prop_get | owner_set;
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367 }
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163
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368
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164
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369 sub CTOR {
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370 my ($this,$table,$constraint) = @_;
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371
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372 die new IMPL::InvalidArgumentException( tableName => "A table name is required" ) unless $table;
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373 die new IMPL::InvalidArgumentException( constraintName => "A constraint name is required" ) unless $constraint;
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374 }
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49
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375
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164
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376 sub apply {
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377 my ($this,$schema) = @_;
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378
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379 my $table = $schema->GetTable($this->tableName) or return 0;
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380
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381 return 0 unless $table->GetConstraint($this->constraintName);
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382
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383 $table->RemoveConstraint($this->constraintName);
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384 return 1;
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385 }
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163
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386
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49
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387
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388 1;
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163
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389
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390 __END__
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391
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392 =pod
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393
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394 =head1 NAME
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395
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396 C<IMPL::SQL::Traits> - Операции над объектками SQL схемы.
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397
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398 =head1 DESCRIPTION
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399
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400 Изменения схемы могу быть представлены в виде последовательности примитивных операций.
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164
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401 Правила выполнения последовательности примитывных действий могут варьироваться
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165
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402 в зависимости от процессора, который их выполняет. Например C<IMPL::SQL::Schema::Traits::Processor>.
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163
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403
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164
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404 Данные, которые содержаться в примитивных операциях не могут существовать независимо от схемы.
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405
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406 =head1 OPEARATIONS
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407
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408 =head2 General
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409
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410 Методы обще для всех примитивных операций.
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411
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412 =over
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413
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414 =item C<apply($schema)>
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415
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416 Пытается приминить операцию к указанной схеме.
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417
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418 Возвращаемое значение:
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419
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420 =over
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421
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422 =item C<true>
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423
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424 Операция успешно применена к схеме.
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425
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426 =item C<false>
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427
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428 Операция не может быть применена к схеме.
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429
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430 =back
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431
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432 =back
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433
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434 =head2 Primitive operations
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435
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436 =over
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437
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165
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438 =item C<IMPL::SQL::Schema::Traits::CreateTable>
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164
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439
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440 Создает таблицу
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441
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442 =over
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443
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444 =item C<CTOR($table)>
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445
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446 =item C<[get]table>
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447
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165
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448 C<IMPL::SQL::Schema::Traits::Table> - описание создаваемой таблицы
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164
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449
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450 =back
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451
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165
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452 =item C<IMPL::SQL::Schema::Traits::DropTable>
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164
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453
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454 Удалает таблицу по имени
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455
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456 =over
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457
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458 =item C<CTOR($tableName)>
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459
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460 =item C<[get]tableName>
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461
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462 Имя удаляемой таблицы
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463
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464 =back
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465
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165
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466 =item C<IMPL::SQL::Schema::Traits::RenameTable>
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164
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467
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468 =over
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469
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470 =item C<CTOR($tableName,$tableNewName)>
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471
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472 =item C<[get]tableName>
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473
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474 Имя таблицы, которую требуется переименовать
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475
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476 =item C<[get]tableNewName>
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477
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478 Новое имя таблицы
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479
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480 =back
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481
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165
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482 =item C<IMPL::SQL::Schema::Traits::AlterTableAddColumn>
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164
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483
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484 Добавляет столбец в таблицу
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485
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486 =over
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487
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488 =item C<CTOR($tableName,$column)>
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489
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490 =item C<[get]tableName>
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491
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492 Имя таблицы в которую нужно добавить столбец
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493
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494 =item C<[get]column>
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495
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165
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496 C<IMPL::SQL::Schema::Traits::Column> - описание столбца который нужно добавить
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164
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497
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498 =back
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499
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165
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500 =item C<IMPL::SQL::Schema::Traits::AlterTableDropColumn>
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164
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501
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502 Удаляет столбец из таблицы
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503
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504 =over
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505
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506 =item C<CTOR($tableName,$columnName)>
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507
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508 =item C<[get]tableName>
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509
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510 Имя таблицы в которой нужно удалить столбец
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511
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512 =item C<[get]columnName>
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513
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514 Имя столбца для удаления
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515
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516 =back
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517
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165
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518 =item C<IMPL::SQL::Schema::Traits::AlterTableChangeColumn>
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164
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519
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520 Меняет описание столбца
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521
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522 =over
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523
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524 =item C<CTOR($tableName,$columnName,%args)>
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525
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526 C<%args> - хеш, ключами которого являются оставшиеся свойства создаваемого объекта.
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527
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528 =item C<[get]tableName>
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529
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530 Имя таблицы в которой находится столбец.
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531
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532 =item C<[get]columnName>
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533
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534 Имя столбца для изменения
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535
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536 =item C<[get]columnType>
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537
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538 Новый тип столбца. Не задан, если тип не меняется
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539
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540 =item C<[get]defaultValue>
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541
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542 Значение по умолчанию. Не задано, если не меняется
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543
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544 =item C<[get]isNullable>
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545
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546 Может ли столбец содержать C<NULL>. Не задано, если не меняется.
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547
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548 =item C<[get]options>
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549
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550 Хеш опций, не задан, если опции не меняются
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551
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552 =back
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553
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165
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554 =item C<IMPL::SQL::Schema::Traits::AlterTableAddConstraint>
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164
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555
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556 Базовый класс для операций по добавлению ограничений
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557
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558 =over
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559
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560 =item C<CTOR($tableName,$constraint)>
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561
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562 =item C<[get]tableName>
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563
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564 Имя таблицы в которую добавляется ограничение.
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565
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566 =item C<[get]constraint>
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567
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165
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568 C<IMPL::SQL::Schema::Traits::Constraint> - описние ограничения, которое нужно добавить.
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164
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569
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570 =back
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571
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165
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572 =item C<IMPL::SQL::Schema::Traits::AlterTableDropConstraint>
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164
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573
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574 Удаляет ограничение на таблицу
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575
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576 =over
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577
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578 =item C<CTOR($tableName,$constraintName)>
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579
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580 =item C<[get]tableName>
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581
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582 Имя таблицы в которой требуется удалить ограничение.
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583
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584 =item C<[get]constraintName>
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585
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586 Имя ограничения для удаления.
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587
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588 =back
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589
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590 =back
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163
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591
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592 =cut |
