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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.query.profile.types;
import com.yahoo.processing.request.Properties;
import com.yahoo.search.schema.internal.TensorConverter;
import com.yahoo.search.query.profile.QueryProfileRegistry;
import com.yahoo.search.query.profile.SubstituteString;
import com.yahoo.tensor.Tensor;
import com.yahoo.tensor.TensorType;
import java.util.Map;
/**
* A tensor field type in a query profile
*
* @author bratseth
*/
public class TensorFieldType extends FieldType {
private final TensorType type;
/** Creates a tensor field type with information about the kind of tensor this will hold */
public TensorFieldType(TensorType type) {
this.type = type;
}
/** Returns information about the type of tensor this will hold */
@Override
public TensorType asTensorType() { return type; }
@Override
public Class getValueClass() { return Tensor.class; }
@Override
public String stringValue() { return type.toString(); }
@Override
public String toString() { return "field type " + stringValue(); }
@Override
public String toInstanceDescription() { return "a tensor"; }
@Override
public Object convertFrom(Object o, QueryProfileRegistry registry) {
return convertFrom(o, ConversionContext.empty());
}
@Override
public Object convertFrom(Object o, ConversionContext context) {
if (o instanceof SubstituteString) return new SubstituteStringTensor((SubstituteString) o, type);
return new TensorConverter(context.embedders()).convertTo(type, context.destination(), o, context.language());
}
public static TensorFieldType fromTypeString(String s) {
return new TensorFieldType(TensorType.fromSpec(s));
}
/**
* A substitute string that should become a tensor once the substitution is performed at lookup time.
* This is to support substitution strings in tensor values by parsing (only) such tensors at
* lookup time rather than at construction time.
*/
private static class SubstituteStringTensor extends SubstituteString {
private final TensorType type;
SubstituteStringTensor(SubstituteString string, TensorType type) {
super(string.components(), string.stringValue());
this.type = type;
}
@Override
public Object substitute(Map<String, String> context, Properties substitution) {
String substituted = super.substitute(context, substitution).toString();
return Tensor.from(type, substituted);
}
}
}
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