private void ParseStep(string xpath, int pos, ArrayList steps,
ArrayList paths, ValidationEventHandler h, XmlSchema schema)
{
pos = SkipWhitespace(xpath, pos);
if (xpath.Length == pos)
{
error(h, "Empty xpath expression is specified");
return;
}
XsdIdentityStep step = new XsdIdentityStep();
switch (xpath [pos])
{
case '@':
if (isSelector)
{
error(h, "Selector cannot include attribute axes.");
currentPath = null;
return;
}
pos++;
step.IsAttribute = true;
pos = SkipWhitespace(xpath, pos);
if (xpath.Length > pos && xpath [pos] == '*')
{
pos++;
step.IsAnyName = true;
break;
}
goto default;
case '.':
pos++; // do nothing ;-)
step.IsCurrent = true;
break;
case '*':
pos++;
step.IsAnyName = true;
break;
case 'c':
if (xpath.Length > pos + 5 && xpath.IndexOf("child", pos, 5) == pos)
{
int tmp = pos;
pos += 5;
pos = SkipWhitespace(xpath, pos);
if (xpath.Length > pos && xpath [pos] == ':' && xpath [pos + 1] == ':')
{
pos += 2;
if (xpath.Length > pos && xpath [pos] == '*')
{
pos++;
step.IsAnyName = true;
break;
}
pos = SkipWhitespace(xpath, pos);
}
else
{
pos = tmp;
}
}
goto default;
case 'a':
if (xpath.Length > pos + 9 && xpath.IndexOf("attribute", pos, 9) == pos)
{
int tmp = pos;
pos += 9;
pos = SkipWhitespace(xpath, pos);
if (xpath.Length > pos && xpath [pos] == ':' && xpath [pos + 1] == ':')
{
if (isSelector)
{
error(h, "Selector cannot include attribute axes.");
currentPath = null;
return;
}
pos += 2;
step.IsAttribute = true;
if (xpath.Length > pos && xpath [pos] == '*')
{
pos++;
step.IsAnyName = true;
break;
}
pos = SkipWhitespace(xpath, pos);
}
else
{
pos = tmp;
}
}
goto default;
default:
int nameStart = pos;
while (xpath.Length > pos)
{
if (!XmlChar.IsNCNameChar(xpath [pos]))
{
break;
}
else
{
pos++;
}
}
if (pos == nameStart)
{
error(h, "Invalid path format for a field.");
this.currentPath = null;
return;
}
if (xpath.Length == pos || xpath [pos] != ':')
{
step.Name = xpath.Substring(nameStart, pos - nameStart);
}
else
{
string prefix = xpath.Substring(nameStart, pos - nameStart);
pos++;
if (xpath.Length > pos && xpath [pos] == '*')
{
string ns = nsmgr.LookupNamespace(prefix, false);
if (ns == null)
{
error(h, "Specified prefix '" + prefix + "' is not declared.");
this.currentPath = null;
return;
}
step.NsName = ns;
pos++;
}
else
{
int localNameStart = pos;
while (xpath.Length > pos)
{
if (!XmlChar.IsNCNameChar(xpath [pos]))
{
break;
}
else
{
pos++;
}
}
step.Name = xpath.Substring(localNameStart, pos - localNameStart);
string ns = nsmgr.LookupNamespace(prefix, false);
if (ns == null)
{
error(h, "Specified prefix '" + prefix + "' is not declared.");
this.currentPath = null;
return;
}
step.Namespace = ns;
}
}
break;
}
if (!step.IsCurrent) // Current step is meaningless, other than its representation.
{
steps.Add(step);
}
pos = SkipWhitespace(xpath, pos);
if (xpath.Length == pos)
{
currentPath.OrderedSteps = (XsdIdentityStep [])steps.ToArray(typeof(XsdIdentityStep));
paths.Add(currentPath);
return;
}
else if (xpath [pos] == '/')
{
pos++;
if (step.IsAttribute)
{
error(h, "Unexpected xpath token after Attribute NameTest.");
this.currentPath = null;
return;
}
this.ParseStep(xpath, pos, steps, paths, h, schema);
if (currentPath == null) // For ValidationEventHandler
{
return;
}
currentPath.OrderedSteps = (XsdIdentityStep [])steps.ToArray(typeof(XsdIdentityStep));
}
else if (xpath [pos] == '|')
{
pos++;
currentPath.OrderedSteps = (XsdIdentityStep [])steps.ToArray(typeof(XsdIdentityStep));
paths.Add(this.currentPath);
this.currentPath = new XsdIdentityPath();
this.ParsePath(xpath, pos, paths, h, schema);
}
else
{
error(h, "Unexpected xpath token after NameTest.");
this.currentPath = null;
return;
}
}
private void ParseStep(string xpath, int pos, ArrayList steps, ArrayList paths, ValidationEventHandler h, XmlSchema schema)
{
pos = this.SkipWhitespace(xpath, pos);
if (xpath.Length == pos)
{
base.error(h, "Empty xpath expression is specified");
return;
}
XsdIdentityStep xsdIdentityStep = new XsdIdentityStep();
char c = xpath[pos];
switch (c)
{
case 'a':
if (xpath.Length > pos + 9 && xpath.IndexOf("attribute", pos, 9) == pos)
{
int num = pos;
pos += 9;
pos = this.SkipWhitespace(xpath, pos);
if (xpath.Length > pos && xpath[pos] == ':' && xpath[pos + 1] == ':')
{
if (this.isSelector)
{
base.error(h, "Selector cannot include attribute axes.");
this.currentPath = null;
return;
}
pos += 2;
xsdIdentityStep.IsAttribute = true;
if (xpath.Length > pos && xpath[pos] == '*')
{
pos++;
xsdIdentityStep.IsAnyName = true;
goto IL_3D5;
}
pos = this.SkipWhitespace(xpath, pos);
}
else
{
pos = num;
}
}
break;
default:
if (c == '*')
{
pos++;
xsdIdentityStep.IsAnyName = true;
goto IL_3D5;
}
if (c == '.')
{
pos++;
xsdIdentityStep.IsCurrent = true;
goto IL_3D5;
}
if (c == '@')
{
if (this.isSelector)
{
base.error(h, "Selector cannot include attribute axes.");
this.currentPath = null;
return;
}
pos++;
xsdIdentityStep.IsAttribute = true;
pos = this.SkipWhitespace(xpath, pos);
if (xpath.Length > pos && xpath[pos] == '*')
{
pos++;
xsdIdentityStep.IsAnyName = true;
goto IL_3D5;
}
}
break;
case 'c':
if (xpath.Length > pos + 5 && xpath.IndexOf("child", pos, 5) == pos)
{
int num2 = pos;
pos += 5;
pos = this.SkipWhitespace(xpath, pos);
if (xpath.Length > pos && xpath[pos] == ':' && xpath[pos + 1] == ':')
{
pos += 2;
if (xpath.Length > pos && xpath[pos] == '*')
{
pos++;
xsdIdentityStep.IsAnyName = true;
goto IL_3D5;
}
pos = this.SkipWhitespace(xpath, pos);
}
else
{
pos = num2;
}
}
break;
}
int num3 = pos;
while (xpath.Length > pos)
{
if (!XmlChar.IsNCNameChar((int)xpath[pos]))
{
break;
}
pos++;
}
if (pos == num3)
{
base.error(h, "Invalid path format for a field.");
this.currentPath = null;
return;
}
if (xpath.Length == pos || xpath[pos] != ':')
{
xsdIdentityStep.Name = xpath.Substring(num3, pos - num3);
}
else
{
string text = xpath.Substring(num3, pos - num3);
pos++;
if (xpath.Length > pos && xpath[pos] == '*')
{
string text2 = this.nsmgr.LookupNamespace(text, false);
if (text2 == null)
{
base.error(h, "Specified prefix '" + text + "' is not declared.");
this.currentPath = null;
return;
}
xsdIdentityStep.NsName = text2;
pos++;
}
else
{
int num4 = pos;
while (xpath.Length > pos)
{
if (!XmlChar.IsNCNameChar((int)xpath[pos]))
{
break;
}
pos++;
}
xsdIdentityStep.Name = xpath.Substring(num4, pos - num4);
string text3 = this.nsmgr.LookupNamespace(text, false);
if (text3 == null)
{
base.error(h, "Specified prefix '" + text + "' is not declared.");
this.currentPath = null;
return;
}
xsdIdentityStep.Namespace = text3;
}
}
IL_3D5:
if (!xsdIdentityStep.IsCurrent)
{
steps.Add(xsdIdentityStep);
}
pos = this.SkipWhitespace(xpath, pos);
if (xpath.Length == pos)
{
this.currentPath.OrderedSteps = (XsdIdentityStep[])steps.ToArray(typeof(XsdIdentityStep));
paths.Add(this.currentPath);
return;
}
if (xpath[pos] == '/')
{
pos++;
if (xsdIdentityStep.IsAttribute)
{
base.error(h, "Unexpected xpath token after Attribute NameTest.");
this.currentPath = null;
return;
}
this.ParseStep(xpath, pos, steps, paths, h, schema);
if (this.currentPath == null)
{
return;
}
this.currentPath.OrderedSteps = (XsdIdentityStep[])steps.ToArray(typeof(XsdIdentityStep));
}
else
{
if (xpath[pos] != '|')
{
base.error(h, "Unexpected xpath token after NameTest.");
this.currentPath = null;
return;
}
pos++;
this.currentPath.OrderedSteps = (XsdIdentityStep[])steps.ToArray(typeof(XsdIdentityStep));
paths.Add(this.currentPath);
this.currentPath = new XsdIdentityPath();
this.ParsePath(xpath, pos, paths, h, schema);
}
}