Xpath Parser enhancement

[gaozhao1989]

Xpath Parser enhancement. Set Xpath Parser almost like this Xpath

1. Nodes

   • [x] nodename : select specific nodename
   • [ ] / : select from root node(get child node)
   • [ ] // : select any matched node ignore current node position(get child node)
   • [ ] . : select current node
   • [ ] .. : select parent node
   • [x] @ : select node attribute

2. Predicates

   • [x] /foo/bar[1] : select the first element 'bar' from element 'foo'
   • [ ] /foo[@name = 'bar']: select all 'foo' elements that attribute "name" attribute with a value of "bar"
   • [ ] /foo[@indexinparent > 10]: select all 'foo' elements which attribute "indexinparent" large than 10

3. Unkown Nodes

   • [x] //* : match any element node

4. Several Paths

   • [ ] //foo/bar | //foo/baz : select all the 'bar' and 'baz' elements of all 'foo' elements
   • [ ] //foo | //bar : select all the 'foo' and 'bar' elements in document

5. Axes(In future)

6. Operations

   • [ ] //foo | //bar : computes two node-sets
   • [ ] @name = 'foo' : name equals to string 'foo'(also need support for other attribute)
   • [ ] @role != 'foo' : role not equal to string 'foo'(also need support for other attribute)
   • [ ] @indexinparent < 2 : index in parent less than 2(also need support for objectdepth)
   • [ ] @indexinparent <= 2 : index in parent less than or equal to 2(also need support for objectdepth)
   • [ ] @indexinparent > 2 : index in parent greater than 2(also need support for objectdepth)
   • [ ] @indexinparent >= 2 : index in parent greater than or equal to 2(also need support for objectdepth)
   • [ ] @name = 'foo' or @name = 'bar' name equals to string 'foo' or 'bar'
   • [ ] @name = 'foo' and @role = 'bar' name equals to string 'foo' and role equals to string 'bar'