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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.document.update;
import com.yahoo.document.DataType;
import com.yahoo.document.TensorDataType;
import com.yahoo.document.datatypes.FieldValue;
import com.yahoo.document.datatypes.TensorFieldValue;
import com.yahoo.document.serialization.DocumentUpdateWriter;
import com.yahoo.tensor.Tensor;
import java.util.Objects;
/**
* An update used to add cells to a sparse or mixed tensor (has at least one mapped dimension).
*/
public class TensorAddUpdate extends ValueUpdate<TensorFieldValue> {
private TensorFieldValue tensor;
public TensorAddUpdate(TensorFieldValue tensor) {
super(ValueUpdateClassID.TENSORADD);
this.tensor = tensor;
}
@Override
protected void checkCompatibility(DataType fieldType) {
if (!(fieldType instanceof TensorDataType)) {
throw new UnsupportedOperationException("Expected tensor type, got " + fieldType.getName() + ".");
}
}
@Override
public void serialize(DocumentUpdateWriter data, DataType superType) {
data.write(this);
}
@Override
public FieldValue applyTo(FieldValue oldValue) {
if ( ! (oldValue instanceof TensorFieldValue)) {
throw new IllegalStateException("Cannot use tensor add update on non-tensor datatype " + oldValue.getClass().getName());
}
if ( ! ((TensorFieldValue) oldValue).getTensor().isPresent()) {
throw new IllegalArgumentException("No existing tensor to apply update to");
}
if ( ! tensor.getTensor().isPresent()) {
return oldValue;
}
Tensor old = ((TensorFieldValue) oldValue).getTensor().get();
Tensor update = tensor.getTensor().get();
Tensor result = old.merge(update, (left, right) -> right); // note this might be slow for large mixed tensor updates
return new TensorFieldValue(result);
}
@Override
public TensorFieldValue getValue() {
return tensor;
}
@Override
public void setValue(TensorFieldValue value) {
tensor = value;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
if (!super.equals(o)) return false;
TensorAddUpdate that = (TensorAddUpdate) o;
return tensor.equals(that.tensor);
}
@Override
public int hashCode() {
return Objects.hash(super.hashCode(), tensor);
}
@Override
public String toString() {
return super.toString() + " " + tensor;
}
}
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