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https://github.com/mikefarah/yq.git
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42 lines
1.1 KiB
Go
42 lines
1.1 KiB
Go
package yqlib
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import (
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"fmt"
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logging "gopkg.in/op/go-logging.v1"
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)
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type DataTreeNavigator interface {
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// given the context and a expressionNode,
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// this will process the against the given expressionNode and return
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// a new context of matching candidates
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GetMatchingNodes(context Context, expressionNode *ExpressionNode) (Context, error)
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}
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type dataTreeNavigator struct {
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}
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func NewDataTreeNavigator() DataTreeNavigator {
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return &dataTreeNavigator{}
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}
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func (d *dataTreeNavigator) GetMatchingNodes(context Context, expressionNode *ExpressionNode) (Context, error) {
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if expressionNode == nil {
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log.Debugf("getMatchingNodes - nothing to do")
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return context, nil
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}
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log.Debugf("Processing Op: %v", expressionNode.Operation.toString())
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if log.IsEnabledFor(logging.DEBUG) {
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for el := context.MatchingNodes.Front(); el != nil; el = el.Next() {
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log.Debug(NodeToString(el.Value.(*CandidateNode)))
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}
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}
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log.Debug(">>")
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handler := expressionNode.Operation.OperationType.Handler
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if handler != nil {
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return handler(d, context, expressionNode)
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}
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return Context{}, fmt.Errorf("Unknown operator %v", expressionNode.Operation.OperationType)
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}
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