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Pass context through operators

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Allows more sophisticated functionality
This commit is contained in:
Mike Farah
2021-02-11 10:58:40 +11:00
parent 3bae44be68
commit c6efd5519b
40 changed files with 439 additions and 434 deletions
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pkg/yqlib/data_tree_navigator.go
+9 -11
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@@ -3,16 +3,14 @@ package yqlib
import (
"fmt"
"container/list"
logging "gopkg.in/op/go-logging.v1"
)
type DataTreeNavigator interface {
// given a list of CandidateEntities and a expressionNode,
// this will process the list against the given expressionNode and return
// a new list of matching candidates
GetMatchingNodes(matchingNodes *list.List, expressionNode *ExpressionNode) (*list.List, error)
// given the context and a expressionNode,
// this will process the against the given expressionNode and return
// a new context of matching candidates
GetMatchingNodes(context Context, expressionNode *ExpressionNode) (Context, error)
}
type dataTreeNavigator struct {
@@ -22,22 +20,22 @@ func NewDataTreeNavigator() DataTreeNavigator {
return &dataTreeNavigator{}
}
func (d *dataTreeNavigator) GetMatchingNodes(matchingNodes *list.List, expressionNode *ExpressionNode) (*list.List, error) {
func (d *dataTreeNavigator) GetMatchingNodes(context Context, expressionNode *ExpressionNode) (Context, error) {
if expressionNode == nil {
log.Debugf("getMatchingNodes - nothing to do")
return matchingNodes, nil
return context, nil
}
log.Debugf("Processing Op: %v", expressionNode.Operation.toString())
if log.IsEnabledFor(logging.DEBUG) {
for el := matchingNodes.Front(); el != nil; el = el.Next() {
for el := context.MatchingNodes.Front(); el != nil; el = el.Next() {
log.Debug(NodeToString(el.Value.(*CandidateNode)))
}
}
log.Debug(">>")
handler := expressionNode.Operation.OperationType.Handler
if handler != nil {
return handler(d, matchingNodes, expressionNode)
return handler(d, context, expressionNode)
}
return nil, fmt.Errorf("Unknown operator %v", expressionNode.Operation.OperationType)
return Context{}, fmt.Errorf("Unknown operator %v", expressionNode.Operation.OperationType)
}