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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.tensor.functions;
import com.google.common.annotations.Beta;
import com.google.common.collect.ImmutableList;
import java.util.List;
/**
* @author bratseth
*/
@Beta
public class Matmul extends CompositeTensorFunction {
private final TensorFunction argument1, argument2;
private final String dimension;
public Matmul(TensorFunction argument1, TensorFunction argument2, String dimension) {
this.argument1 = argument1;
this.argument2 = argument2;
this.dimension = dimension;
}
@Override
public List<TensorFunction> functionArguments() { return ImmutableList.of(argument1, argument2); }
@Override
public TensorFunction replaceArguments(List<TensorFunction> arguments) {
if ( arguments.size() != 2)
throw new IllegalArgumentException("Matmul must have 2 arguments, got " + arguments.size());
return new Matmul(arguments.get(0), arguments.get(1), dimension);
}
@Override
public PrimitiveTensorFunction toPrimitive() {
TensorFunction primitiveArgument1 = argument1.toPrimitive();
TensorFunction primitiveArgument2 = argument2.toPrimitive();
return new Reduce(new Join(primitiveArgument1, primitiveArgument2, ScalarFunctions.multiply()),
Reduce.Aggregator.sum,
dimension);
}
@Override
public String toString(ToStringContext context) {
return "matmul(" + argument1.toString(context) + ", " + argument2.toString(context) + ", " + dimension + ")";
}
}
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