How to evaluate from specified node? #141
Description
I have a doc like following. I want to extract the text of "abc" and "def", when text of node "b" starts with "a". I first used a XPath /root/a/b[starts-with(text(), 'a')]/.. to get to node "a". Then evaluate //a/b/text() and //a/c/text() on node "a". Surprisingly it returned content of a's sibling. What should I do?
<root>
<other-node-with-same-structure></other-node-with-same-structure>
<a>
<b>abc</b>
<c>def</c>
</a>
<other-node-with-same-structure></other-node-with-same-structure>
</root>
Rust code:
let xpath_factory = sxd_xpath::Factory::new();
let b = xpath_factory.build("//a/b/text()")?.unwrap();
let c = xpath_factory.build("//a/c/text()")?.unwrap();
let xdoc: sxd_document::Document = todo!();
let matches = sxd_xpath::evaluate_xpath(
&xdoc,
"/root/a/b[starts-with(text(), 'a')]/..",
)?;
if let sxd_xpath::Value::Nodeset(nodes) = matches {
nodes
.iter()
.map(|i| {
let context = sxd_xpath::Context::new();
let b_text = if let sxd_xpath::Value::Nodeset(bs) = b.evaluate(&context, i)? {
bs.iter()
.next()
.map(|x| x.string_value())
.unwrap_or_default()
} else {
"".to_string()
};
let c_text = if let sxd_xpath::Value::Nodeset(cs) = c.evaluate(&context, i)? {
cs.iter()
.next()
.map(|x| x.string_value())
.unwrap_or_default()
} else {
"".to_string()
};
})
.collect::<Result<_>>()?;
}