{"id":1006,"date":"2011-02-05T12:25:57","date_gmt":"2011-02-05T03:25:57","guid":{"rendered":"http:\/\/www.kazu.tv\/blog\/?p=1006"},"modified":"2013-09-16T21:19:34","modified_gmt":"2013-09-16T12:19:34","slug":"scala_enumerati","status":"publish","type":"post","link":"https:\/\/kazu.tv\/blog\/2011\/02\/05\/scala_enumerati\/","title":{"rendered":"Scala Enumeration\u3068Lift MappedEnum"},"content":{"rendered":"<h3>\u25a0MappedEnum<\/h3>\n<p>Lift\u306b\u306fMappedEnum\u3068\u3044\u3046\u578b\u304c\u3042\u308b\u3002\u578b\u5f15\u6570\u306e1\u3064\u3067Enumeration\u306e\u5b50\u30af\u30e9\u30b9\u3092\u53d6\u308b\u3002\u30e2\u30c7\u30eb\u30af\u30e9\u30b9\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u305d\u308c\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u30d5\u30a9\u30fc\u30e0\u3067\u306fEnumeration\u306e\u5404\u8981\u7d20\u304c\u30d7\u30eb\u30c0\u30a6\u30f3\u3067\u9078\u629e\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3002<\/p>\n<p>MappedEnum\u306e\u30b7\u30b0\u30cb\u30c1\u30e3\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002<\/p>\n<pre class=\"brush: scala; code\">\nabstract class MappedEnum[T&lt;:Mapper[T], ENUM &lt;: Enumeration] (val fieldOwner: T, val enum: ENUM)\nextends MappedField[ENUM#Value, T] <\/pre>\n<p><!--more--><\/p>\n<h3>\u25a0Enumeration<\/h3>\n<p>Scala\u306eEnumeration\u306fJava\u306eEnum\u3068\u4f3c\u305f\u3088\u3046\u306a\u3082\u306e\u3002\u30a4\u30de\u30a4\u30c1\u4f7f\u3044\u306b\u304f\u3044\u3068\u3044\u3046\u8a71\u3092\u8272\u3005\u805e\u304f\u3082\u306e\u306e\u3001MappedEnum\u306e\u5f15\u6570\u306bEnumeration\u3092\u53d6\u308b\u306e\u3067\u4ed5\u65b9\u306a\u304f\u4f7f\u3046\u4e8b\u306b\u3002<\/p>\n<p>\u5b9a\u7fa9\u3068\u3057\u3066\u306f\u3001\u901a\u5e38\u306f\u4ee5\u4e0b\u306e\u611f\u3058\u3067\u3002Value\u3068\u304b\u306b\u95a2\u3057\u3066\u306f\u691c\u7d22\u3059\u308b\u3068\u60c5\u5831\u304c\u8272\u3005\u51fa\u3066\u304f\u308b\u306f\u305a\u306a\u306e\u3067\u8aac\u660e\u306f\u7701\u7565\u3002<\/p>\n<pre class=\"brush: scala; code\">\nobject Sex extends Enumeration {\nval Male, Female = Value\n}\n<\/pre>\n<p>\u4eca\u56de\u306f\u5c11\u3057\u62e1\u5f35\u3057\u3066\u4ee5\u4e0b\u306e\u901a\u308a\uff08\u5b9f\u969b\u306b\u4f7f\u3063\u3066\u308b\u30b3\u30fc\u30c9\u3088\u308a\u629c\u7c8b\uff09\u3002<a href=\"http:\/\/downgra.de\/2010\/02\/11\/playing-with-scala-enumeration\/\" target=\"_blank\">\u3053\u308c<\/a>\u3084<a href=\"http:\/\/stackoverflow.com\/questions\/2364555\/referring-to-a-enumeration-value-type-in-a-method-signature\" target=\"_blank\">\u3053\u308c<\/a>\u3092\u53c2\u8003\u306b\u3057\u305f\u3002<\/p>\n<pre class=\"brush: scala; code\">\nobject TemplateType extends Enumeration {\nval Basic = TemplateTypeVal(&quot;Basic&quot;)\nval Blank = TemplateTypeVal(&quot;Blank&quot;)\nval Mvc   = TemplateTypeVal(&quot;MVC&quot;)\nval Xhtml = TemplateTypeVal(&quot;XHTML&quot;)\n\/\/ \u72ec\u81ea\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u6301\u305f\u305b\u308b\ncase class TemplateTypeVal(name: String) extends Val(name) {\nval dirName = &quot;lift_&quot; + name.toLowerCase\n}\nimplicit def valueToTemplateTypeValue(v: Value): TemplateTypeVal\n= v.asInstanceOf[TemplateTypeVal]\n}\n<\/pre>\n<h3>\u25a0MappedEnum\u306bEnumeration\u3092\u6e21\u3059<\/h3>\n<p>\u30e2\u30c7\u30eb\u30af\u30e9\u30b9\u306e\u5b9a\u7fa9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3057\u305f\uff08\u4e00\u90e8\u7701\u7565\uff09\u3002<\/p>\n<pre class=\"brush: scala; code\">\nclass Foo extends LongKeyedMapper[Foo] with IdPK\nwith CRUDify[Long, Foo] {\nobject templateType extends MappedEnum(this, TemplateType)\n}\n<\/pre>\n<p>&nbsp;\u3053\u308c\u3067\u3068\u308a\u3042\u3048\u305a\u306f\u666e\u901a\u306b\u52d5\u4f5c\u3059\u308b\u3063\u307d\u3044\u3002<\/p>\n<h3>\u25a0\u554f\u984c<\/h3>\n<p>\u305d\u306eEnumeration\u306e\u5b50\u30af\u30e9\u30b9\uff08\u5148\u307b\u3069\u306e\u4f8b\u3067\u8a00\u3046\u3068TemplateType\uff09\u3092\u5f15\u6570\u306b\u53d6\u308b\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u3063\u3066\u3001\u305d\u3053\u306b\u30e2\u30c7\u30eb\u30af\u30e9\u30b9\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u6e21\u305d\u3046\u3068\u3059\u308b\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3002<\/p>\n<p>\u3053\u3061\u3089\u304c\u30b3\u30fc\u30c9<\/p>\n<pre class=\"brush: scala; code\">\ncase class ClassA(v: TemplateType.Value) {\n\/\/ ....\n}\nobject ClassA { \/\/ \u30b3\u30f3\u30d1\u30cb\u30aa\u30f3\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\ndef apply(m: Foo) {\nthis(m.templateType.is)\n}\n}\n<\/pre>\n<p>\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002<\/p>\n<pre class=\"brush: plain; code\">\n[error] \/project\/src\/main\/scala\/code\/lib\/ClassA.scala:nn: type mismatch;\n[error]  found   : somepackage.lib.TemplateType#Value\n[error]  required: somepackage.lib.TemplateType.Value\n[error]     this(m.templateType.is)\n[error]                         ^\n[error] one error found\n<\/pre>\n<p>\u81ea\u5206\u306eScala\u306e\u5e2b\u5320\u306e1\u4eba\u306b\u3088\u308b\u3068\u3001\u300cA#B\u306f\u3001object A\u306e\u5185\u90e8\u30af\u30e9\u30b9\u304cB\u3067\u3001A.B\u306f\u3001class A\u306e\u5185\u90e8\u30af\u30e9\u30b9\u304cB\u300d\u3060\u305d\u3046\u3060\u3002<\/p>\n<h3>\u25a0\u89e3\u6c7a\u65b9\u6cd5<\/h3>\n<p>\u4ee5\u4e0b\u306e\u901a\u308a\u30e2\u30c7\u30eb\u30af\u30e9\u30b9\u306e\u5b9a\u7fa9\u3092\u5909\u66f4\u3057\u305f\u3002<a target=\"_blank\" href=\"http:\/\/groups.google.com\/group\/liftweb\/browse_thread\/thread\/23b9bc6d1fc3055d\">\u3053\u3061\u3089<\/a>\u3092\u53c2\u8003\u306b\u3057\u305f\u3002<\/p>\n<pre class=\"brush: scala; code\">\nclass Foo extends LongKeyedMapper[Foo] with IdPK\nwith CRUDify[Long, Foo] {\nobject templateType extends MappedEnum[Foo, TemplateType.type](this, TemplateType)\n}\n<\/pre>\n<p>Scala\u306fJava\u306b\u6bd4\u3079\u3066\u578b\u30b7\u30b9\u30c6\u30e0\u304c\u67d4\u8edf\u3067\u8868\u73fe\u529b\u304c\u9ad8\u3044\u306e\u306f\u3044\u3044\u304c\u3001\u8272\u3005\u96e3\u3057\u3044\u306a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u25a0MappedEnum Lift\u306b\u306fMappedEnum\u3068\u3044\u3046\u578b\u304c\u3042\u308b\u3002\u578b\u5f15\u6570\u306e1\u3064\u3067Enumeration\u306e\u5b50\u30af\u30e9\u30b9\u3092\u53d6\u308b\u3002\u30e2\u30c7\u30eb\u30af\u30e9\u30b9\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u305d\u308c\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u30d5\u30a9\u30fc\u30e0\u3067\u306fEnumeration\u306e\u5404\u8981\u7d20\u304c\u30d7\u30eb\u30c0&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[20],"tags":[870,871,17,872,873,947],"class_list":["post-1006","post","type-post","status-publish","format-standard","hentry","category-scala","tag-enumeration","tag-inner-class","tag-lift","tag-mappedenum","tag-object","tag-scala"],"_links":{"self":[{"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/posts\/1006","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/comments?post=1006"}],"version-history":[{"count":1,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/posts\/1006\/revisions"}],"predecessor-version":[{"id":1148,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/posts\/1006\/revisions\/1148"}],"wp:attachment":[{"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/media?parent=1006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/categories?post=1006"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/tags?post=1006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}