diff options
Diffstat (limited to 'vespajlib/src/main/java/com/yahoo/tensor/functions/ScalarFunction.java')
-rw-r--r-- | vespajlib/src/main/java/com/yahoo/tensor/functions/ScalarFunction.java | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/vespajlib/src/main/java/com/yahoo/tensor/functions/ScalarFunction.java b/vespajlib/src/main/java/com/yahoo/tensor/functions/ScalarFunction.java new file mode 100644 index 00000000000..c6a244b64df --- /dev/null +++ b/vespajlib/src/main/java/com/yahoo/tensor/functions/ScalarFunction.java @@ -0,0 +1,22 @@ +// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root. +package com.yahoo.tensor.functions; + +import com.yahoo.tensor.evaluation.EvaluationContext; + +import java.util.function.Function; + +/** + * A function which returns a scalar + * + * @author bratseth + */ +public interface ScalarFunction extends Function<EvaluationContext<?>, Double> { + + @Override + Double apply(EvaluationContext<?> context); + + default String toString(ToStringContext context) { + return toString(); + } + +} |