78 lines
2.5 KiB
Java
78 lines
2.5 KiB
Java
package androidx.recyclerview.widget;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import androidx.annotation.RestrictTo;
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import androidx.recyclerview.widget.DiffUtil;
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import java.util.concurrent.Executor;
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import java.util.concurrent.Executors;
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public final class AsyncDifferConfig<T> {
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@NonNull
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private final Executor mBackgroundThreadExecutor;
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@NonNull
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private final DiffUtil.ItemCallback<T> mDiffCallback;
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@Nullable
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private final Executor mMainThreadExecutor;
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public static final class Builder<T> {
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private static Executor sDiffExecutor;
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private static final Object sExecutorLock = new Object();
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private Executor mBackgroundThreadExecutor;
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private final DiffUtil.ItemCallback<T> mDiffCallback;
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@Nullable
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private Executor mMainThreadExecutor;
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public Builder(@NonNull DiffUtil.ItemCallback<T> itemCallback) {
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this.mDiffCallback = itemCallback;
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}
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@NonNull
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public AsyncDifferConfig<T> build() {
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if (this.mBackgroundThreadExecutor == null) {
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synchronized (sExecutorLock) {
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if (sDiffExecutor == null) {
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sDiffExecutor = Executors.newFixedThreadPool(2);
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}
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}
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this.mBackgroundThreadExecutor = sDiffExecutor;
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}
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return new AsyncDifferConfig<>(this.mMainThreadExecutor, this.mBackgroundThreadExecutor, this.mDiffCallback);
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}
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@NonNull
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public Builder<T> setBackgroundThreadExecutor(Executor executor) {
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this.mBackgroundThreadExecutor = executor;
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return this;
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}
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@NonNull
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@RestrictTo({RestrictTo.Scope.LIBRARY})
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public Builder<T> setMainThreadExecutor(Executor executor) {
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this.mMainThreadExecutor = executor;
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return this;
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}
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}
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public AsyncDifferConfig(@Nullable Executor executor, @NonNull Executor executor2, @NonNull DiffUtil.ItemCallback<T> itemCallback) {
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this.mMainThreadExecutor = executor;
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this.mBackgroundThreadExecutor = executor2;
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this.mDiffCallback = itemCallback;
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}
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@NonNull
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public Executor getBackgroundThreadExecutor() {
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return this.mBackgroundThreadExecutor;
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}
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@NonNull
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public DiffUtil.ItemCallback<T> getDiffCallback() {
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return this.mDiffCallback;
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}
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@Nullable
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@RestrictTo({RestrictTo.Scope.LIBRARY})
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public Executor getMainThreadExecutor() {
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return this.mMainThreadExecutor;
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}
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}
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