public override bool TryEvaluate(DynamicResources resources, IValue root,
JsonLocationNode lastNode,
IValue current,
ProcessingFlags options,
out IValue result)
{
JsonLocationNode?ancestor = lastNode;
int index = 0;
while (ancestor != null && index < _ancestorDepth)
{
ancestor = ancestor.Parent;
++index;
}
if (ancestor != null)
{
JsonLocation path = new JsonLocation(ancestor);
IValue value;
if (TryGetValue(root, path, out value))
{
return(this.TryEvaluateTail(resources, root, path.Last, value, options, out result));
}
else
{
result = JsonConstants.Null;
return(true);
}
}
else
{
result = JsonConstants.Null;
return(true);
}
}
public override void Select(DynamicResources resources,
IValue root,
JsonLocationNode lastNode,
IValue current,
INodeReceiver receiver,
ProcessingFlags options,
int depth)
{
JsonLocationNode?ancestor = lastNode;
int index = 0;
while (ancestor != null && index < _ancestorDepth)
{
ancestor = ancestor.Parent;
++index;
}
if (ancestor != null)
{
JsonLocation path = new JsonLocation(ancestor);
IValue value;
if (TryGetValue(root, path, out value))
{
this.TailSelect(resources, root, path.Last, value, receiver, options, depth);
}
}
}
/// <summary>
/// Compares this instance with a specified <see cref="JsonLocationNode"/> object and indicates
/// whether this instance precedes, follows, or appears in the same
/// position in the sort order as the specified <see cref="JsonLocationNode"/>.
/// </summary>
/// <param name="other"></param>
/// <returns></returns>
public int CompareTo(JsonLocationNode other)
{
if (other == null)
{
return(1);
}
int diff = 0;
if (ComponentKind != other.ComponentKind)
{
diff = ComponentKind - other.ComponentKind;
}
else
{
switch (ComponentKind)
{
case JsonLocationNodeKind.Root:
diff = string.Compare(_name, other._name);
break;
case JsonLocationNodeKind.Index:
diff = _index - other._index;
break;
case JsonLocationNodeKind.Name:
diff = string.Compare(_name, other._name);
break;
}
}
return(diff);
}
public override void Select(DynamicResources resources,
IValue root,
JsonLocationNode lastNode,
IValue current,
INodeReceiver receiver,
ProcessingFlags options,
int depth)
{
if (current.ValueKind == JsonValueKind.Array)
{
Int32 index = 0;
foreach (var item in current.EnumerateArray())
{
this.TailSelect(resources, root,
PathGenerator.Generate(lastNode, index, options),
item, receiver, options, depth);
++index;
}
}
else if (current.ValueKind == JsonValueKind.Object)
{
foreach (var prop in current.EnumerateObject())
{
this.TailSelect(resources, root,
PathGenerator.Generate(lastNode, prop.Name, options),
prop.Value, receiver, options, depth);
}
}
}
public abstract void Select(DynamicResources resources,
IValue root,
JsonLocationNode lastNode,
IValue current,
INodeReceiver receiver,
ProcessingFlags options,
int depth);
public override void Select(DynamicResources resources,
IValue root,
JsonLocationNode lastNode,
IValue current,
INodeReceiver receiver,
ProcessingFlags options,
int depth)
{
if (current.ValueKind == JsonValueKind.Array)
{
if (_index >= 0 && _index < current.GetArrayLength())
{
this.TailSelect(resources, root,
PathGenerator.Generate(lastNode, _index, options),
current[_index], receiver, options, depth);
}
else
{
Int32 index = current.GetArrayLength() + _index;
if (index >= 0 && index < current.GetArrayLength())
{
this.TailSelect(resources, root,
PathGenerator.Generate(lastNode, _index, options),
current[index], receiver, options, depth);
}
}
}
}
public override bool TryEvaluate(DynamicResources resources, IValue root,
JsonLocationNode lastNode,
IValue current,
ProcessingFlags options,
out IValue value)
{
return(this.TryEvaluateTail(resources, root, lastNode, current, options, out value));
}
public override void Select(DynamicResources resources,
IValue root,
JsonLocationNode lastNode,
IValue current,
INodeReceiver receiver,
ProcessingFlags options,
int depth)
{
this.TailSelect(resources, root, lastNode, current, receiver, options, depth);
}
/// <summary>
/// Constructs a path node from a parent and an index
/// </summary>
/// <param name="parent">The parent.</param>
/// <param name="index">The index.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="parent"/> is <see langword="null"/>.
/// </exception>
public JsonLocationNode(JsonLocationNode parent, Int32 index)
{
if (parent == null)
{
throw new ArgumentNullException(nameof(parent));
}
Parent = parent;
ComponentKind = JsonLocationNodeKind.Index;
_name = "";
_index = index;
}
public override void Select(DynamicResources resources,
IValue root,
JsonLocationNode lastNode,
IValue current,
INodeReceiver receiver,
ProcessingFlags options,
int depth)
{
if (current.ValueKind == JsonValueKind.Array)
{
Int32 start = _slice.GetStart(current.GetArrayLength());
Int32 end = _slice.GetStop(current.GetArrayLength());
Int32 step = _slice.Step;
if (step > 0)
{
if (start < 0)
{
start = 0;
}
if (end > current.GetArrayLength())
{
end = current.GetArrayLength();
}
for (Int32 i = start; i < end; i += step)
{
this.TailSelect(resources, root,
PathGenerator.Generate(lastNode, i, options),
current[i], receiver, options, depth);
}
}
else if (step < 0)
{
if (start >= current.GetArrayLength())
{
start = current.GetArrayLength() - 1;
}
if (end < -1)
{
end = -1;
}
for (Int32 i = start; i > end; i += step)
{
if (i < current.GetArrayLength())
{
this.TailSelect(resources, root,
PathGenerator.Generate(lastNode, i, options),
current[i], receiver, options, depth);
}
}
}
}
}
static internal JsonLocationNode Generate(JsonLocationNode lastNode,
Int32 index,
ProcessingFlags options)
{
if ((options & ProcessingFlags.Path) != 0)
{
return(new JsonLocationNode(lastNode, index));
}
else
{
return(lastNode);
}
}
static internal JsonLocationNode Generate(JsonLocationNode lastNode,
string identifier,
ProcessingFlags options)
{
if ((options & ProcessingFlags.Path) != 0)
{
return(new JsonLocationNode(lastNode, identifier));
}
else
{
return(lastNode);
}
}
/// <summary>
/// Constructs a path node from a parent and name
/// </summary>
/// <param name="parent">The parent.</param>
/// <param name="name">The name.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="parent"/> is <see langword="null"/>.
/// <paramref name="name"/> is <see langword="null"/>.
/// </exception>
public JsonLocationNode(JsonLocationNode parent, string name)
{
if (parent == null)
{
throw new ArgumentNullException(nameof(parent));
}
if (name == null)
{
throw new ArgumentNullException(nameof(name));
}
Parent = parent;
ComponentKind = JsonLocationNodeKind.Name;
_name = name;
_index = 0;
}
/// <summary>
/// Constructs a normalized path from the last location node.
///
/// </summary>
public JsonLocation(JsonLocationNode lastNode)
{
var nodes = new List <JsonLocationNode>();
JsonLocationNode?node = lastNode;
do
{
nodes.Add(node);
node = node.Parent;
}while (node != null);
nodes.Reverse();
_components = nodes;
}
protected void TailSelect(DynamicResources resources,
IValue root,
JsonLocationNode lastNode,
IValue current,
INodeReceiver receiver,
ProcessingFlags options,
int depth)
{
if (Tail == null)
{
receiver.Add(lastNode, current);
}
else
{
Tail.Select(resources, root, lastNode, current, receiver, options, depth);
}
}
protected bool TryEvaluateTail(DynamicResources resources,
IValue root,
JsonLocationNode lastNode,
IValue current,
ProcessingFlags options,
out IValue value)
{
if (Tail == null)
{
value = current;
return(true);
}
else
{
return(Tail.TryEvaluate(resources, root, lastNode, current, options, out value));
}
}
public override void Select(DynamicResources resources,
IValue root,
JsonLocationNode lastNode,
IValue current,
INodeReceiver receiver,
ProcessingFlags options,
int depth)
{
if (current.ValueKind == JsonValueKind.Object)
{
IValue value;
if (current.TryGetProperty(_identifier, out value))
{
this.TailSelect(resources, root,
PathGenerator.Generate(lastNode, _identifier, options),
value, receiver, options, depth);
}
}
}
public override bool TryEvaluate(DynamicResources resources,
IValue root,
JsonLocationNode lastNode,
IValue current,
ProcessingFlags options,
out IValue result)
{
if (resources.TryRetrieveFromCache(_id, out result))
{
return(true);
}
else
{
if (!this.TryEvaluateTail(resources, root, lastNode, root, options, out result))
{
result = JsonConstants.Null;
return(false);
}
resources.AddToCache(_id, result);
return(true);
}
}
public override bool TryEvaluate(DynamicResources resources, IValue root,
JsonLocationNode lastNode,
IValue current,
ProcessingFlags options,
out IValue value)
{
if (current.ValueKind == JsonValueKind.Object)
{
IValue element;
if (current.TryGetProperty(_identifier, out element))
{
return(this.TryEvaluateTail(resources, root,
PathGenerator.Generate(lastNode, _identifier, options),
element, options, out value));
}
else
{
value = JsonConstants.Null;
return(true);
}
}
else if (current.ValueKind == JsonValueKind.Array && _identifier == "length")
{
value = new DecimalValue(new Decimal(current.GetArrayLength()));
return(true);
}
else if (current.ValueKind == JsonValueKind.String && _identifier == "length")
{
byte[] bytes = Encoding.UTF32.GetBytes(current.GetString().ToCharArray());
value = new DecimalValue(new Decimal(current.GetString().Length));
return(true);
}
else
{
value = JsonConstants.Null;
return(true);
}
}
public override bool TryEvaluate(DynamicResources resources, IValue root,
JsonLocationNode lastNode,
IValue current,
ProcessingFlags options,
out IValue results)
{
var elements = new List <IValue>();
INodeReceiver receiver = new ValueReceiver(elements);
if (resources.Options.ExecutionMode == PathExecutionMode.Parallel)
{
receiver = new SynchronizedNodeReceiver(receiver);
}
Select(resources,
root,
lastNode,
current,
receiver,
options,
0);
results = new ArrayValue(elements);
return(true);
}
public void Select(DynamicResources resources,
IValue root,
JsonLocationNode lastNode,
IValue current,
INodeReceiver receiver,
ProcessingFlags options,
int depth)
{
if (resources.Options.ExecutionMode == PathExecutionMode.Sequential)
{
foreach (var selector in _selectors)
{
selector.Select(resources, root, lastNode, current, receiver, options, depth);
}
}
else
{
Action <int> action = delegate(int i)
{
_selectors[i].Select(resources, root, lastNode, current, receiver, options, depth);
};
Parallel.For(0, _selectors.Count, action);
}
}
public override bool TryEvaluate(DynamicResources resources, IValue root,
JsonLocationNode lastNode,
IValue current,
ProcessingFlags options,
out IValue value)
{
if (current.ValueKind == JsonValueKind.Array)
{
if (_index >= 0 && _index < current.GetArrayLength())
{
return(this.TryEvaluateTail(resources, root,
PathGenerator.Generate(lastNode, _index, options),
current[_index], options, out value));
}
else
{
Int32 index = current.GetArrayLength() + _index;
if (index >= 0 && index < current.GetArrayLength())
{
return(this.TryEvaluateTail(resources, root,
PathGenerator.Generate(lastNode, _index, options),
current[index], options, out value));
}
else
{
value = JsonConstants.Null;
return(true);
}
}
}
else
{
value = JsonConstants.Null;
return(true);
}
}
public override void Select(DynamicResources resources,
IValue root,
JsonLocationNode lastNode,
IValue current,
INodeReceiver receiver,
ProcessingFlags options,
int depth)
{
if (depth >= resources.Options.MaxDepth)
{
throw new InvalidOperationException($"Maximum depth level exceeded in recursive descent selector.");
}
if (current.ValueKind == JsonValueKind.Array)
{
this.TailSelect(resources, root, lastNode, current, receiver, options, depth + 1);
Int32 index = 0;
foreach (var item in current.EnumerateArray())
{
Select(resources, root,
PathGenerator.Generate(lastNode, index, options),
item, receiver, options, depth + 1);
++index;
}
}
else if (current.ValueKind == JsonValueKind.Object)
{
this.TailSelect(resources, root, lastNode, current, receiver, options, depth + 1);
foreach (var prop in current.EnumerateObject())
{
Select(resources, root,
PathGenerator.Generate(lastNode, prop.Name, options),
prop.Value, receiver, options, depth + 1);
}
}
}
public void Add(JsonLocationNode lastNode, IValue value)
{
_accumulator.Add(lastNode, value);
}
public void Add(JsonLocationNode lastNode, IValue value)
{
_nodes.Add(new PathValuePair(new JsonLocation(lastNode), value.GetJsonElement()));
}
public void Add(JsonLocationNode lastNode, IValue value)
{
_values.Add(new JsonLocation(lastNode));
}
public void Add(JsonLocationNode lastNode, IValue value)
{
_values.Add(value);
}
public void Add(JsonLocationNode lastNode, IValue value)
{
_values.Add(value.GetJsonElement());
}
public abstract bool TryEvaluate(DynamicResources resources,
IValue root,
JsonLocationNode lastNode,
IValue current,
ProcessingFlags options,
out IValue value);
