1 files changed, 0 insertions, 121 deletions
diff --git a/searchlib/src/main/java/com/yahoo/searchlib/rankingexpression/Reference.java b/searchlib/src/main/java/com/yahoo/searchlib/rankingexpression/Reference.java
deleted file mode 100644
index 6277721e8f5..00000000000
--- a/searchlib/src/main/java/com/yahoo/searchlib/rankingexpression/Reference.java
+++ /dev/null
@@ -1,121 +0,0 @@
-// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
-package com.yahoo.searchlib.rankingexpression;
-
-import com.yahoo.searchlib.rankingexpression.rule.Arguments;
-import com.yahoo.searchlib.rankingexpression.rule.CompositeNode;
-import com.yahoo.searchlib.rankingexpression.rule.ExpressionNode;
-import com.yahoo.searchlib.rankingexpression.rule.ReferenceNode;
-import com.yahoo.searchlib.rankingexpression.rule.SerializationContext;
-import com.yahoo.tensor.evaluation.TypeContext;
-
-import java.util.Deque;
-import java.util.Objects;
-import java.util.Optional;
-import java.util.stream.Collectors;
-
-/**
- * A reference to a feature, function, or value in ranking expressions
- *
- * @author bratseth
- */
-public class Reference extends TypeContext.Name {
-
-    private final String name;
-    private final Arguments arguments;
-
-    /**
-     * The output, or null if none
-     */
-    private final String output;
-
-    public Reference(String name, Arguments arguments, String output) {
-        super(name);
-        Objects.requireNonNull(name, "name cannot be null");
-        Objects.requireNonNull(arguments, "arguments cannot be null");
-        this.name = name;
-        this.arguments = arguments;
-        this.output = output;
-    }
-
-    public String name() { return name; }
-
-    public Arguments arguments() { return arguments; }
-
-    public String output() { return output; }
-
-    /**
-     * Creates a reference to a simple feature consisting of a name and a single argument
-     */
-    public static Reference simple(String name, String argumentValue) {
-        return new Reference(name,
-                             new Arguments(new ReferenceNode(argumentValue)),
-                             null);
-    }
-
-    /**
-     * Returns the given simple feature as a reference, or empty if it is not a valid simple
-     * feature string on the form name(argument).
-     */
-    public static Optional<Reference> simple(String feature) {
-        int startParenthesis = feature.indexOf('(');
-        if (startParenthesis < 0)
-            return Optional.empty();
-        int endParenthesis = feature.lastIndexOf(')');
-        String featureName = feature.substring(0, startParenthesis);
-        if (startParenthesis < 1 || endParenthesis < startParenthesis) return Optional.empty();
-        String argument = feature.substring(startParenthesis + 1, endParenthesis);
-        if (argument.startsWith("'") || argument.startsWith("\""))
-            argument = argument.substring(1);
-        if (argument.endsWith("'") || argument.endsWith("\""))
-            argument = argument.substring(0, argument.length() - 1);
-        return Optional.of(simple(featureName, argument));
-    }
-
-    /**
-     * Returns whether this is a simple identifier - no arguments or output
-     */
-    public boolean isIdentifier() {
-        return this.arguments.expressions().size() == 0 && output == null;
-    }
-
-    public Reference withArguments(Arguments arguments) {
-        return new Reference(name, arguments, output);
-    }
-
-    public Reference withOutput(String output) {
-        return new Reference(name, arguments, output);
-    }
-
-    @Override
-    public boolean equals(Object o) {
-        if (o == this) return true;
-        if (!(o instanceof Reference)) return false;
-        Reference other = (Reference) o;
-        if (!Objects.equals(other.name, this.name)) return false;
-        if (!Objects.equals(other.arguments, this.arguments)) return false;
-        if (!Objects.equals(other.output, this.output)) return false;
-        return true;
-    }
-
-    @Override
-    public int hashCode() {
-        return Objects.hash(name, arguments, output);
-    }
-
-    @Override
-    public String toString() {
-        return toString(new SerializationContext(), null, null);
-    }
-
-    public String toString(SerializationContext context, Deque<String> path, CompositeNode parent) {
-        StringBuilder b = new StringBuilder(name);
-        if (arguments != null && arguments.expressions().size() > 0)
-            b.append("(").append(arguments.expressions().stream()
-                                                        .map(node -> node.toString(context, path, parent))
-                                                        .collect(Collectors.joining(","))).append(")");
-        if (output != null)
-            b.append(".").append(output);
-        return b.toString();
-    }
-
-}