On 28/10/2019 17:41, Davi Baldin Tavares wrote:
Hi,
I’m wondering the implementation create a tree of the expression for example:
Filter = (&(name=davi*)(age>=30)(o=Some company))
Node representation:
Root operation AND
-> leaf: operation = , key: name, value: davi*
-> leaf: operation >= , key: age, value: 30
-> leaf: operation = , key: o, value: Some company
Yes. It creates a AndNode which has 32 children :
o a SubstringNode
o a GreaterEqualNode
o a EqualityNode
Then I would like to iterate over ExprNode content and create a Mongo’s filter
based on the LDAP Style search...
You will need to use instanceOf on each node to know which kind of
filter you are dealing with.
I figured out that classes like EqualityNode has attribute name
(getAttribute()) and value (getValue()). However I couldn’t figure out how to
iterate over ExprNode content.
I appreciate any advice.
Cheers,
Davi
On 28 Oct 2019, at 11:20, Emmanuel Lécharny <[email protected]> wrote:
Hi,
On 28/10/2019 13:12, Davi Baldin Tavares wrote:
Hello,
I would like to use Apache’s FilterParser to parser RFC style queries.
However, digging into your APIs, I couldn’t figure out how to navigate under
the parsed filter structure. My goal is to iterate over parser attributes and
construct a MongoDB’s filter object.
import org.apache.directory.shared.ldap.filter.FilterParser;
final ExprNode filter = FilterParser.parse(“(name=Davi)”);
Would you have an example of iterating over the parsed filter?
Not sure what you mean by 'iterating over the parsed filter'.
In any case, the parse() method returns a ExprNode instance, which depends on
the kind of filter you just parsed. You have 2 big classes of Nodes :
- branch nodes (&, |, !), which contains sub-nodes
- leaf nodes ( =*, <=, >=, =, ~=, substring and extensible nodes), which are
final nodes.
You can check the type of nodes you are dealing with using the
ExprNode.isLeaf(), then the simlplest way to know which kind of node is to use
instanceof.
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
