Created
June 20, 2012 01:25
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Cake Pattern Imitated
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| // You create the trait. | |
| trait JavaScriptCompilerComponent { | |
| def compiler: JavaScriptCompiler | |
| trait JavaScriptCompiler { | |
| def compile(files: Seq[Source]): String | |
| } | |
| } | |
| // You implement it. | |
| trait DummyJavaScriptParserComponent extends JavaScriptCompilerComponent { | |
| override val compiler = new DummyJavaScriptCompiler | |
| class DummyJavaScriptCompiler extends JavaScriptCompiler { | |
| override def compile(files: Seq[Source]) = { | |
| ... | |
| } | |
| } | |
| } | |
| trait PageRenderer { | |
| def render: Elem | |
| } | |
| // You add the dependecy. | |
| class MyPageRenderer extends PageRenderer { this: JavaScriptCompilerComponent => | |
| val jsFiles = Source.fromFile("test.js") :: Nil | |
| override def render = | |
| <html> | |
| <script> | |
| {compiler.compile(jsFiles)} | |
| </script> | |
| </html> | |
| } | |
| // And you inject it. | |
| val page = new MyPageRenderer with DummyJavaScriptParserComponent | |
| ... | |
| page.render |
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