/// <summary>
/// Handles the iteration of the children or qualfier </summary>
/// <param name="iterator"> an iterator </param>
/// <returns> Returns if there are more elements available. </returns>
private bool IterateChildren(IEnumerator iterator)
{
if (_outerInstance._skipSiblings)
{
// setSkipSiblings(false);
_outerInstance._skipSiblings = false;
_subIterator = EmptyList.GetEnumerator();
}
// create sub iterator for every child,
// if its the first child visited or the former child is finished
bool subIteratorMoveNext = _subIterator.MoveNext();
if (!subIteratorMoveNext && iterator.MoveNext())
{
XmpNode child = (XmpNode)iterator.Current;
_index++;
_subIterator = new NodeIterator(_outerInstance, child, _path, _index);
}
if (subIteratorMoveNext)
{
_returnProperty = (IXmpPropertyInfo)_subIterator.Current;
return(true);
}
return(false);
}
/// <summary>
/// Get the value for items with the name without namespace
/// </summary>
/// <param name="property">IXmpPropertyInfo read from string</param>
/// <param name="xmpName">xmpName, for example dc:subject[1]</param>
/// <returns>value or null</returns>
private static string GetNullNameSpace(IXmpPropertyInfo property, string xmpName)
{
if (property.Path == xmpName && !string.IsNullOrEmpty(property.Value) &&
string.IsNullOrEmpty(property.Namespace))
{
return(property.Value);
}
return(null);
}
/// <summary>Sets the returnProperty as next item or recurses into <c>hasNext()</c>.</summary>
/// <returns>Returns if there is a next item to return.</returns>
private bool ReportNode()
{
_state = IterateChildren;
if (_visitedNode.Parent != null && (!_enclosing.Options.IsJustLeafNodes || !_visitedNode.HasChildren))
{
_returnProperty = CreatePropertyInfo(_visitedNode, _enclosing.BaseNamespace, _path);
return(true);
}
return(HasNext());
}
/// <summary>
/// Get the value for items with the name with a namespace
/// </summary>
/// <param name="property">IXmpPropertyInfo read from string</param>
/// <param name="xmpName">xmpName, for example dc:subject[1]</param>
/// <returns>value or null</returns>
private string GetContentNameSpace(IXmpPropertyInfo property, string xmpName)
{
if (property.Path == xmpName && !string.IsNullOrEmpty(property.Value) &&
!string.IsNullOrEmpty(property.Namespace))
// the difference it this ^^!^^
{
return(property.Value);
}
return(null);
}
/// <summary>Calls hasNext() and returns the prepared node.</summary>
/// <remarks>
/// Calls hasNext() and returns the prepared node. Afterward it's set to null.
/// The existence of returnProperty indicates if there is a next node, otherwise
/// an exception is thrown.
/// </remarks>
public virtual object Next()
{
if (HasNext())
{
var result = _returnProperty;
_returnProperty = null;
return(result);
}
throw new InvalidOperationException("There are no more nodes to return");
}
/// <summary>
/// Sets the returnProperty as next item or recurses into <code>hasNext()</code>. </summary>
/// <returns> Returns if there is a next item to return. </returns>
protected internal virtual bool ReportNode()
{
_state = ITERATE_CHILDREN;
if (_visitedNode.Parent != null &&
(!_outerInstance.Options.JustLeafnodes || !_visitedNode.HasChildren()))
{
_returnProperty = CreatePropertyInfo(_visitedNode, _outerInstance.BaseNs, _path);
return(true);
}
return(MoveNext());
}
/// <summary>Handles the iteration of the children or qualfier</summary>
/// <param name="iterator">an iterator</param>
/// <returns>Returns if there are more elements available.</returns>
private bool IterateChildrenMethod(IIterator iterator)
{
if (_enclosing._skipSiblings)
{
// setSkipSiblings(false);
_enclosing._skipSiblings = false;
_subIterator = Enumerable.Empty <object>().Iterator();
}
// create sub iterator for every child,
// if its the first child visited or the former child is finished
if (!_subIterator.HasNext() && iterator.HasNext())
{
var child = (XmpNode)iterator.Next();
_index++;
_subIterator = new NodeIterator(_enclosing, child, _path, _index);
}
if (_subIterator.HasNext())
{
_returnProperty = (IXmpPropertyInfo)_subIterator.Next();
return(true);
}
return(false);
}
/// <param name="returnProperty">the returnProperty to set</param> protected void SetReturnProperty(IXmpPropertyInfo returnProperty) => _returnProperty = returnProperty;
/**
* @param prop an <code>XmpPropertyInfo</code> from the <code>XmpIterator</code>.
*/
private static void printPropertyInfo(IXmpPropertyInfo prop)
{
log.WriteLine("NS ({0}) PATH ({1}) VALUE ({2}) OPTIONS ({3})",
prop.Namespace, prop.Path, prop.Value, prop.Options.GetOptionsString());
}
private TreeDirectory(IXmpPropertyInfo x)
{
Element = x;
}
/// <summary>
/// Handles the iteration of the children or qualfier </summary>
/// <param name="iterator"> an iterator </param>
/// <returns> Returns if there are more elements available. </returns>
private bool IterateChildren(IEnumerator iterator) {
if (_outerInstance._skipSiblings) {
// setSkipSiblings(false);
_outerInstance._skipSiblings = false;
_subIterator = EmptyList.GetEnumerator();
}
// create sub iterator for every child,
// if its the first child visited or the former child is finished
bool subIteratorMoveNext = _subIterator.MoveNext();
if (!subIteratorMoveNext && iterator.MoveNext()) {
XmpNode child = (XmpNode) iterator.Current;
_index++;
_subIterator = new NodeIterator(_outerInstance, child, _path, _index);
}
if (subIteratorMoveNext) {
_returnProperty = (IXmpPropertyInfo) _subIterator.Current;
return true;
}
return false;
}
/// <summary>
/// Sets the returnProperty as next item or recurses into <code>hasNext()</code>. </summary>
/// <returns> Returns if there is a next item to return. </returns>
protected internal virtual bool ReportNode() {
_state = ITERATE_CHILDREN;
if (_visitedNode.Parent != null &&
(!_outerInstance.Options.JustLeafnodes || !_visitedNode.HasChildren())) {
_returnProperty = CreatePropertyInfo(_visitedNode, _outerInstance.BaseNs, _path);
return true;
}
return MoveNext();
}
private TreeDirectory(IXmpPropertyInfo x)
{
this.Element = x;
}
/// <param name="returnProperty">the returnProperty to set</param>
protected void SetReturnProperty(IXmpPropertyInfo returnProperty)
{
_returnProperty = returnProperty;
}
/// <summary>Calls hasNext() and returns the prepared node.</summary>
/// <remarks>
/// Calls hasNext() and returns the prepared node. Afterward it's set to null.
/// The existence of returnProperty indicates if there is a next node, otherwise
/// an exception is thrown.
/// </remarks>
public virtual object Next()
{
if (HasNext())
{
var result = _returnProperty;
_returnProperty = null;
return result;
}
throw new InvalidOperationException("There are no more nodes to return");
}
/// <summary>Handles the iteration of the children or qualfier</summary>
/// <param name="iterator">an iterator</param>
/// <returns>Returns if there are more elements available.</returns>
private bool IterateChildrenMethod(IIterator iterator)
{
if (_enclosing._skipSiblings)
{
// setSkipSiblings(false);
_enclosing._skipSiblings = false;
_subIterator = Enumerable.Empty<object>().Iterator();
}
// create sub iterator for every child,
// if its the first child visited or the former child is finished
if ((!_subIterator.HasNext()) && iterator.HasNext())
{
var child = (XmpNode)iterator.Next();
_index++;
_subIterator = new NodeIterator(_enclosing, child, _path, _index);
}
if (_subIterator.HasNext())
{
_returnProperty = (IXmpPropertyInfo)_subIterator.Next();
return true;
}
return false;
}
/// <summary>Sets the returnProperty as next item or recurses into <c>hasNext()</c>.</summary>
/// <returns>Returns if there is a next item to return.</returns>
private bool ReportNode()
{
_state = IterateChildren;
if (_visitedNode.Parent != null && (!_enclosing.Options.IsJustLeafNodes || !_visitedNode.HasChildren))
{
_returnProperty = CreatePropertyInfo(_visitedNode, _enclosing.BaseNamespace, _path);
return true;
}
return HasNext();
}
/**
* @param prop an <code>XmpPropertyInfo</code> from the <code>XmpIterator</code>.
*/
private static void printPropertyInfo(IXmpPropertyInfo prop)
{
log.WriteLine("NS ({0}) PATH ({1}) VALUE ({2}) OPTIONS ({3})",
prop.Namespace, prop.Path, prop.Value, prop.Options.GetOptionsString());
}