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Alternative approach for schema free delta report.
Problem Statement
The problem with 2nd Delta API is that it needs to compare any JSON payload to data stored under an anchor. This JSON payload can be coming from any source and regardless of its schema a delta should be generated between the payload and the data under the anchor.
The preferable approach here would be to parse the JSON payload into DataNodes and then compare the generated DataNodes against the DataNodes under the anchor. This would allow us to have a delta report which
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is in line
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with CPS and would enable us to provide crucial detail about the data nodes that is their xpath.
But since the second API accepts any JSON string as an input, one cannot be always sure that the payload will have the same schema as the anchor. And hence the approach of parsing to DataNodes can only happen when the schemas are identical.
In cases where schemas are not identical, there as soon as we attempt to parse the payload to DataNode, CPS will throw an exception terminating the parsing.
The most feasible alternative is to make use of JSON Nodes along with JSON path. Where JSON Nodes and JSON Path are used as a replacement for DataNodes and xPaths respectively.
Use of JSON Nodes and JSON Path
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