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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package ai.vespa.rankingexpression.importer.tensorflow;
import ai.vespa.rankingexpression.importer.ImportedModel;
import ai.vespa.rankingexpression.importer.ModelImporter;
import ai.vespa.rankingexpression.importer.configmodelview.ImportedMlModel;
import ai.vespa.rankingexpression.importer.onnx.OnnxImporter;
import com.yahoo.collections.Pair;
import com.yahoo.io.IOUtils;
import com.yahoo.system.ProcessExecuter;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.logging.Logger;
/**
* Converts a saved TensorFlow model into a ranking expression and set of constants.
*
* @author bratseth
* @author lesters
*/
public class TensorFlowImporter extends ModelImporter {
private static final Logger log = Logger.getLogger(TensorFlowImporter.class.getName());
private final static int[] onnxOpsetsToTry = {12, 10, 8};
private final OnnxImporter onnxImporter = new OnnxImporter();
@Override
public boolean canImport(String modelPath) {
File modelDir = new File(modelPath);
if ( ! modelDir.isDirectory()) return false;
// No other model types are stored in protobuf files thus far
for (File file : modelDir.listFiles()) {
if (file.toString().endsWith(".pbtxt")) return true;
if (file.toString().endsWith(".pb")) return true;
}
return false;
}
/**
* Imports a saved TensorFlow model from a directory.
* The model should be saved as a .pbtxt or .pb file.
*
* @param modelName the name of the model to import, consisting of characters in [A-Za-z0-9_]
* @param modelDir the directory containing the TensorFlow model files to import
*/
@Override
public ImportedModel importModel(String modelName, String modelDir) {
throw new IllegalArgumentException("Import of TensorFlow models is no longer supported");
}
}
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