huaxingao opened a new pull request #26388: [SPARK-29746][ML] Implement validateInputType in Normalizer/ElementwiseProduct/PolynomialExpansion URL: https://github.com/apache/spark/pull/26388 ### What changes were proposed in this pull request? This PR implements ```validateInput``` in ```ElementwiseProduct```, ```Normalizer``` and ```PolynomialExpansion```. ### Why are the changes needed? ```UnaryTransformer``` has abstract method ```validateInputType``` and call it in ```transformSchema```, but this method is not implemented in ```ElementwiseProduct```, ```Normalizer``` and ```PolynomialExpansion```. ### Does this PR introduce any user-facing change? No ### How was this patch tested? Existing tests
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