ADD week 5

02-Easy5/E5/sources/androidx/recyclerview/widget/AsyncDifferConfig.java

@@ -0,0 +1,64 @@
+package androidx.recyclerview.widget;
+
+import androidx.recyclerview.widget.DiffUtil;
+import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
+
+/* loaded from: classes.dex */
+public final class AsyncDifferConfig<T> {
+    private final Executor mBackgroundThreadExecutor;
+    private final DiffUtil.ItemCallback<T> mDiffCallback;
+    private final Executor mMainThreadExecutor;
+
+    public Executor getBackgroundThreadExecutor() {
+        return this.mBackgroundThreadExecutor;
+    }
+
+    public DiffUtil.ItemCallback<T> getDiffCallback() {
+        return this.mDiffCallback;
+    }
+
+    public Executor getMainThreadExecutor() {
+        return this.mMainThreadExecutor;
+    }
+
+    AsyncDifferConfig(Executor executor, Executor executor2, DiffUtil.ItemCallback<T> itemCallback) {
+        this.mMainThreadExecutor = executor;
+        this.mBackgroundThreadExecutor = executor2;
+        this.mDiffCallback = itemCallback;
+    }
+
+    public static final class Builder<T> {
+        private static Executor sDiffExecutor;
+        private static final Object sExecutorLock = new Object();
+        private Executor mBackgroundThreadExecutor;
+        private final DiffUtil.ItemCallback<T> mDiffCallback;
+        private Executor mMainThreadExecutor;
+
+        public Builder<T> setBackgroundThreadExecutor(Executor executor) {
+            this.mBackgroundThreadExecutor = executor;
+            return this;
+        }
+
+        public Builder<T> setMainThreadExecutor(Executor executor) {
+            this.mMainThreadExecutor = executor;
+            return this;
+        }
+
+        public Builder(DiffUtil.ItemCallback<T> itemCallback) {
+            this.mDiffCallback = itemCallback;
+        }
+
+        public AsyncDifferConfig<T> build() {
+            if (this.mBackgroundThreadExecutor == null) {
+                synchronized (sExecutorLock) {
+                    if (sDiffExecutor == null) {
+                        sDiffExecutor = Executors.newFixedThreadPool(2);
+                    }
+                }
+                this.mBackgroundThreadExecutor = sDiffExecutor;
+            }
+            return new AsyncDifferConfig<>(this.mMainThreadExecutor, this.mBackgroundThreadExecutor, this.mDiffCallback);
+        }
+    }
+}