/// <summary>
/// 读取数据,并且替换合集对应资源;
/// </summary>
private T InternalReplace <T>(string key, WeakReferenceObject old, Func <T> loader)
where T : class
{
T asset = loader.Invoke();
var weakReferenceObject = new WeakReferenceObject <T>(asset, old);
using (objectCollectionLock.WriteLock())
{
objectCollection[key] = weakReferenceObject;
}
return(asset);
}
/// <summary>
/// 读取数据,并且将它加入到资源合集;
/// </summary>
private T InternalAdd <T>(string key, Func <T> loader)
where T : class
{
T asset = loader.Invoke();
var weakReferenceObject = new WeakReferenceObject <T>(asset);
using (objectCollectionLock.WriteLock())
{
objectCollection.Add(key, weakReferenceObject);
}
return(asset);
}
/// <summary>
/// 确认是否存在该资源,若资源类型不同 或 已经被回收 都返回 false;
/// </summary>
public bool Contains <T>(string key)
where T : class
{
ThrowIfKeyInconformity <T>(key);
using (objectCollectionLock.ReadLock())
{
WeakReferenceObject obj;
if (objectCollection.TryGetValue(key, out obj))
{
WeakReferenceObject <T> weakReferenceObject = obj as WeakReferenceObject <T>;
if (weakReferenceObject != null)
{
return(weakReferenceObject.IsAlive());
}
}
return(false);
}
}
/// <summary>
/// 尝试获取到对应资源;
/// </summary>
public bool TryGet <T>(string key, out T value)
where T : class
{
ThrowIfKeyInconformity <T>(key);
using (objectCollectionLock.ReadLock())
{
WeakReferenceObject obj;
if (objectCollection.TryGetValue(key, out obj))
{
WeakReferenceObject <T> weakReferenceObject = obj as WeakReferenceObject <T>;
if (weakReferenceObject != null)
{
return(weakReferenceObject.TryGetTarget(out value));
}
}
value = default(T);
return(false);
}
}
/// <summary>
/// 读取到资源,若已经存在则直接返回;
/// </summary>
public T Load <T>(string key, Func <T> loader)
where T : class
{
ThrowIfKeyInconformity <T>(key);
if (loader == null)
{
throw new ArgumentNullException(nameof(loader));
}
using (objectCollectionLock.UpgradeableReadLock())
{
WeakReferenceObject obj;
if (objectCollection.TryGetValue(key, out obj))
{
WeakReferenceObject <T> weakReferenceObject = obj as WeakReferenceObject <T>;
if (weakReferenceObject == null)
{
throw InvalidType <T>(key);
}
else
{
T asset;
if (weakReferenceObject.TryGetTarget(out asset))
{
return(asset);
}
else
{
return(InternalReplace(key, obj, loader));
}
}
}
else
{
return(InternalAdd(key, loader));
}
}
}
/// <summary>
/// 添加或更新合集内容;
/// </summary>
public AddOrUpdateStatus AddOrUpdate <T>(string key, WeakReferenceObject <T> value)
where T : class
{
ThrowIfKeyInconformity <T>(key);
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
using (objectCollectionLock.WriteLock())
{
if (objectCollection.ContainsKey(key))
{
objectCollection[key] = value;
return(AddOrUpdateStatus.Updated);
}
else
{
objectCollection.Add(key, value);
return(AddOrUpdateStatus.Added);
}
}
}
/// <summary>
/// 尝试获取到对应类型资源,若key类型不对应则抛出异常;
/// </summary>
private bool InternalTryGet <T>(string key, out WeakReferenceObject <T> weakReferenceObject)
where T : class
{
WeakReferenceObject obj;
if (objectCollection.TryGetValue(key, out obj))
{
weakReferenceObject = obj as WeakReferenceObject <T>;
if (weakReferenceObject == null)
{
throw InvalidType <T>(key);
}
else
{
return(true);
}
}
else
{
weakReferenceObject = null;
return(false);
}
}
/// <summary>
/// 获取到对应资源,若不存在则返回异常;
/// </summary>
public T Get <T>(string key)
where T : class
{
ThrowIfKeyInconformity <T>(key);
using (objectCollectionLock.ReadLock())
{
WeakReferenceObject obj;
if (objectCollection.TryGetValue(key, out obj))
{
WeakReferenceObject <T> weakReferenceObject = obj as WeakReferenceObject <T>;
if (weakReferenceObject != null)
{
T asset;
if (weakReferenceObject.TryGetTarget(out asset))
{
return(asset);
}
}
}
throw new KeyNotFoundException(key);
}
}
/// <summary>
/// 添加内容到合集;
/// </summary>
public void Add <T>(string key, WeakReferenceObject <T> value)
where T : class
{
ThrowIfKeyInconformity <T>(key);
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
using (objectCollectionLock.UpgradeableReadLock())
{
if (objectCollection.ContainsKey(key))
{
using (objectCollectionLock.WriteLock())
{
objectCollection.Add(key, value);
}
}
else
{
throw new ArgumentException();
}
}
}
public WeakReferenceObject(WeakReferenceObject obj)
{
RequestTimes = obj.RequestTimes;
CreateTime = obj.CreateTime;
LastRequestTime = obj.LastRequestTime;
}
