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refactor(desktop): Add interface Book and its implementation BookImpl
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desktopDomain/src/main/kotlin/com/intelligentbackpack/desktopdomain/entities/Book.kt
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| @@ -0,0 +1,90 @@ | ||
| package com.intelligentbackpack.desktopdomain.entities | ||
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| import com.intelligentbackpack.desktopdomain.entities.implementations.BookImpl | ||
| import com.intelligentbackpack.desktopdomain.exception.ISBNException | ||
| import com.intelligentbackpack.desktopdomain.policies.ISBNPolicy | ||
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| interface Book { | ||
| /** | ||
| * The ISBN of the book. | ||
| */ | ||
| val isbn: String | ||
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| /** | ||
| * The title of the book. | ||
| */ | ||
| val title: String | ||
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| /** | ||
| * The authors of the book. | ||
| */ | ||
| val authors: Set<String> | ||
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| companion object { | ||
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| /** | ||
| * Builds a book copy. | ||
| * | ||
| * @param block The builder block. | ||
| * @return The book copy built. | ||
| * @throws IllegalArgumentException If the book title is black or the authors are blanck. | ||
| * @throws ISBNException If the ISBN of the book is not valid. | ||
| * @throws IllegalStateException If not all the properties are initialized. | ||
| */ | ||
| inline fun build( | ||
| block: Builder.() -> Unit | ||
| ): Book = Builder().apply(block).build() | ||
| } | ||
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| class Builder { | ||
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| /** | ||
| * The ISBN of the book. | ||
| */ | ||
| lateinit var isbn: String | ||
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| /** | ||
| * The title of the book. | ||
| */ | ||
| lateinit var title: String | ||
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| /** | ||
| * The authors of the book. | ||
| */ | ||
| lateinit var authors: Set<String> | ||
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| /** | ||
| * Builds the school supply. | ||
| * | ||
| * @return The school supply built. | ||
| * @throws IllegalStateException If not all properties are initialized. | ||
| * @throws IllegalArgumentException for any other reason. | ||
| * @throws ISBNException If the ISBN of the book is not valid. | ||
| */ | ||
| @Throws( | ||
| IllegalStateException::class, | ||
| ISBNException::class, | ||
| IllegalArgumentException::class | ||
| ) | ||
| fun build(): Book = | ||
| if (this::isbn.isInitialized && | ||
| this::title.isInitialized && | ||
| this::authors.isInitialized | ||
| ) | ||
| if (title.isNotBlank() && | ||
| authors.all { it.isNotBlank() } | ||
| ) | ||
| if (ISBNPolicy.isValid(isbn)) { | ||
| BookImpl( | ||
| isbn = isbn, | ||
| title = title, | ||
| authors = authors | ||
| ) | ||
| } else | ||
| throw ISBNException() | ||
| else | ||
| throw IllegalStateException("Not all properties are initialized") | ||
| else | ||
| throw IllegalStateException("Not all properties are initialized") | ||
| } | ||
| } |
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18 changes: 18 additions & 0 deletions
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...rc/main/kotlin/com/intelligentbackpack/desktopdomain/entities/implementations/BookImpl.kt
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,18 @@ | ||
| package com.intelligentbackpack.desktopdomain.entities.implementations | ||
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| import com.intelligentbackpack.desktopdomain.entities.Book | ||
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| data class BookImpl( | ||
| override val isbn: String | ||
| ) : Book { | ||
| override lateinit var title: String | ||
| private set | ||
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| override lateinit var authors: Set<String> | ||
| private set | ||
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| constructor(isbn: String, title: String, authors: Set<String>) : this(isbn) { | ||
| this.title = title | ||
| this.authors = authors | ||
| } | ||
| } |