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using System;
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using System.Diagnostics;
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namespace Implab {
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class PromiseActionReaction<T> : IResolvable<T> {
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readonly Deferred m_next;
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readonly IDispatcher m_dispatcher;
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readonly Action<T, Deferred> m_fulfilled;
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readonly Action<Exception, Deferred> m_rejected;
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public IPromise Promise {
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get { return m_next.Promise; }
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}
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public PromiseActionReaction(Action<T, Deferred> fulfilled, Action<Exception, Deferred> rejected, Deferred next, IDispatcher dispatcher) {
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m_next = next;
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m_fulfilled = fulfilled;
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m_rejected = rejected;
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m_dispatcher = dispatcher;
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}
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public void Resolve(T result) {
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if (m_fulfilled != null) {
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if (m_dispatcher != null)
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m_dispatcher.Enqueue(ResolveImpl, result);
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else
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ResolveImpl(result);
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} else {
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m_next.Resolve();
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}
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}
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void ResolveImpl (T result) {
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m_fulfilled(result, m_next);
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}
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public void Reject(Exception error) {
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if (m_fulfilled != null) {
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if (m_dispatcher != null)
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m_dispatcher.Enqueue(RejectImpl, error);
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else
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RejectImpl(error);
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} else {
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m_next.Reject(error);
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}
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}
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void RejectImpl(Exception error) {
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m_rejected(error, m_next);
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}
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public static PromiseActionReaction<T> Create(Action<T> fulfilled, Action<Exception> rejected, IDispatcher dispatcher) {
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return new PromiseActionReaction<T>(
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fulfilled != null ? PromiseHandler.Create(fulfilled) : null,
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rejected != null ? PromiseHandler.Create(rejected) : null,
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new Deferred(),
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dispatcher
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);
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}
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public static PromiseActionReaction<T> Create(Func<T,IPromise> fulfilled, Action<Exception> rejected, IDispatcher dispatcher) {
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return new PromiseActionReaction<T>(
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fulfilled != null ? PromiseHandler.Create(fulfilled) : null,
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rejected != null ? PromiseHandler.Create(rejected) : null,
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new Deferred(),
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dispatcher
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);
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}
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public static PromiseActionReaction<T> Create(Action<T> fulfilled, Func<Exception, IPromise> rejected, IDispatcher dispatcher) {
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return new PromiseActionReaction<T>(
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fulfilled != null ? PromiseHandler.Create(fulfilled) : null,
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rejected != null ? PromiseHandler.Create(rejected) : null,
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new Deferred(),
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dispatcher
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);
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}
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public static PromiseActionReaction<T> Create(Func<T,IPromise> fulfilled, Func<Exception, IPromise> rejected, IDispatcher dispatcher) {
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return new PromiseActionReaction<T>(
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fulfilled != null ? PromiseHandler.Create(fulfilled) : null,
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rejected != null ? PromiseHandler.Create(rejected) : null,
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new Deferred(),
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dispatcher
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);
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}
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}
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}
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