优化

app/src/main/java/io/legado/app/model/CacheBook.kt

@@ -19,14 +19,12 @@ import kotlinx.coroutines.delay
 import java.util.concurrent.ConcurrentHashMap
 import kotlin.coroutines.CoroutineContext
 
-class CacheBook(var bookSource: BookSource, var book: Book) {
+object CacheBook {
 
-    companion object {
-
-        val cacheBookMap = ConcurrentHashMap<String, CacheBook>()
+    val cacheBookMap = ConcurrentHashMap<String, CacheBookModel>()
 
     @Synchronized
-        fun getOrCreate(bookUrl: String): CacheBook? {
+    fun getOrCreate(bookUrl: String): CacheBookModel? {
         val book = appDb.bookDao.getBook(bookUrl) ?: return null
         val bookSource = appDb.bookSourceDao.getBookSource(book.origin) ?: return null
         var cacheBook = cacheBookMap[bookUrl]
@@ -36,13 +34,13 @@ class CacheBook(var bookSource: BookSource, var book: Book) {
             cacheBook.book = book
             return cacheBook
         }
-            cacheBook = CacheBook(bookSource, book)
+        cacheBook = CacheBookModel(bookSource, book)
         cacheBookMap[bookUrl] = cacheBook
         return cacheBook
     }
 
     @Synchronized
-        fun getOrCreate(bookSource: BookSource, book: Book): CacheBook {
+    fun getOrCreate(bookSource: BookSource, book: Book): CacheBookModel {
         var cacheBook = cacheBookMap[book.bookUrl]
         if (cacheBook != null) {
             //存在时更新,书源可能会变化,必须更新
@@ -50,7 +48,7 @@ class CacheBook(var bookSource: BookSource, var book: Book) {
             cacheBook.book = book
             return cacheBook
         }
-            cacheBook = CacheBook(bookSource, book)
+        cacheBook = CacheBookModel(bookSource, book)
         cacheBookMap[book.bookUrl] = cacheBook
         return cacheBook
     }
@@ -126,7 +124,8 @@ class CacheBook(var bookSource: BookSource, var book: Book) {
             }
             return count
         }
-    }
+
+    class CacheBookModel(var bookSource: BookSource, var book: Book) {
 
         private val waitDownloadSet = hashSetOf<Int>()
         private val onDownloadSet = hashSetOf<Int>()
@@ -285,3 +284,5 @@ class CacheBook(var bookSource: BookSource, var book: Book) {
         }
 
     }
+
+}