//please kill me
private static ASTNodePathStep parseStep(ASTNodeAbstractExpr node)
{
ASTNodePathStep step = new ASTNodePathStep();
if (node.content.Count == 1 && node.getTokenType(0) == Token.DOT)
{
step.axisType = ASTNodePathStep.AXIS_TYPE_NULL;
step.nodeTestType = ASTNodePathStep.NODE_TEST_TYPE_ABBR_DOT;
}
else if (node.content.Count == 1 && node.getTokenType(0) == Token.DBL_DOT)
{
step.axisType = ASTNodePathStep.AXIS_TYPE_NULL;
step.nodeTestType = ASTNodePathStep.NODE_TEST_TYPE_ABBR_DBL_DOT;
}
else
{
int i = 0;
if (node.content.Count > 0 && node.getTokenType(0) == Token.AT)
{
step.axisType = ASTNodePathStep.AXIS_TYPE_ABBR;
i += 1;
}
else if (node.content.Count > 1 && node.getTokenType(0) == Token.QNAME && node.getTokenType(1) == Token.DBL_COLON)
{
int axisVal = ASTNodePathStep.validateAxisName(((XPathQName)node.getToken(0).val).ToString());
if (axisVal == -1)
{
throw new XPathSyntaxException();
}
step.axisType = ASTNodePathStep.AXIS_TYPE_EXPLICIT;
step.axisVal = axisVal;
i += 2;
}
else
{
step.axisType = ASTNodePathStep.AXIS_TYPE_NULL;
}
if (node.content.Count > i && node.getTokenType(i) == Token.WILDCARD)
{
step.nodeTestType = ASTNodePathStep.NODE_TEST_TYPE_WILDCARD;
}
else if (node.content.Count > i && node.getTokenType(i) == Token.NSWILDCARD)
{
step.nodeTestType = ASTNodePathStep.NODE_TEST_TYPE_NSWILDCARD;
step.nodeTestNamespace = (String)node.getToken(i).val;
}
else if (node.content.Count > i && node.getTokenType(i) == Token.QNAME)
{
step.nodeTestType = ASTNodePathStep.NODE_TEST_TYPE_QNAME;
step.nodeTestQName = (XPathQName)node.getToken(i).val;
}
else if (node.content.Count > i && node.content[i] is ASTNodeFunctionCall)
{
if (!ASTNodePathStep.validateNodeTypeTest((ASTNodeFunctionCall)node.content[i]))
{
throw new XPathSyntaxException();
}
step.nodeTestType = ASTNodePathStep.NODE_TEST_TYPE_FUNC;
step.nodeTestFunc = (ASTNodeFunctionCall)node.content[i];
}
else
{
throw new XPathSyntaxException();
}
i += 1;
while (i < node.content.Count)
{
if (node.content[i] is ASTNodePredicate)
{
step.predicates.Add(node.content[i]);
}
else
{
throw new XPathSyntaxException();
}
i++;
}
}
return(step);
}
private static void parsePathExpr(ASTNode node)
{
if (node is ASTNodeAbstractExpr)
{
ASTNodeAbstractExpr absNode = (ASTNodeAbstractExpr)node;
int[] pathOps = { Token.SLASH, Token.DBL_SLASH };
ASTNodeAbstractExpr.Partition part = absNode.partition(pathOps, 0, absNode.content.Count);
if (part.separators.Count == 0)
{
//filter expression or standalone step
if (isStep(absNode))
{
ASTNodePathStep step = parseStep(absNode);
ASTNodeLocPath path = new ASTNodeLocPath();
path.clauses.Add(step);
absNode.condense(path, 0, absNode.content.Count);
}
else
{
//filter expr
ASTNodeFilterExpr filt = parseFilterExp(absNode);
if (filt != null)
{
absNode.condense(filt, 0, absNode.content.Count);
}
}
}
else
{
//path expression (but first clause may be filter expr)
ASTNodeLocPath path = new ASTNodeLocPath();
path.separators = part.separators;
if (part.separators.Count == 1 && absNode.content.Count == 1 && vectInt(part.separators, 0) == Token.SLASH)
{
//empty absolute path
}
else
{
for (int i = 0; i < part.pieces.Count; i++)
{
ASTNodeAbstractExpr x = (ASTNodeAbstractExpr)part.pieces[i];
if (isStep(x))
{
ASTNodePathStep step = parseStep(x);
path.clauses.Add(step);
}
else
{
if (i == 0)
{
if (x.content.Count == 0)
{
//absolute path expr; first clause is null
/* do nothing */
}
else
{
//filter expr
ASTNodeFilterExpr filt = parseFilterExp(x);
if (filt != null)
{
path.clauses.Add(filt);
}
else
{
path.clauses.Add(x);
}
}
}
else
{
throw new XPathSyntaxException();
}
}
}
}
absNode.condense(path, 0, absNode.content.Count);
}
}
for (IEnumerator e = node.getChildren().GetEnumerator(); e.MoveNext();)
{
parsePathExpr((ASTNode)e.Current);
}
}
