Unify on List.of

7 files changed, 11 insertions, 17 deletions

diff --git a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/Argument.java b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/Argument.java
index e985b6d2956..dbd17d96d4f 100644
--- a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/Argument.java
+++ b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/Argument.java
@@ -8,7 +8,6 @@ import com.yahoo.tensor.evaluation.VariableTensor;
 import com.yahoo.tensor.functions.Rename;
 import com.yahoo.tensor.functions.TensorFunction;
 
-import java.util.Collections;
 import java.util.List;
 
 public class Argument extends IntermediateOperation {
@@ -16,7 +15,7 @@ public class Argument extends IntermediateOperation {
     private OrderedTensorType standardNamingType;  // using standard naming convention: d0, d1, ...
 
     public Argument(String modelName, String nodeName, OrderedTensorType type) {
-        super(modelName, nodeName, Collections.emptyList());
+        super(modelName, nodeName, List.of());
         this.type = type.rename(vespaName() + "_");
         standardNamingType = OrderedTensorType.standardType(type);
     }
diff --git a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/Constant.java b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/Constant.java
index 91c46d1232e..1d430611c49 100644
--- a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/Constant.java
+++ b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/Constant.java
@@ -7,14 +7,13 @@ import com.yahoo.searchlib.rankingexpression.Reference;
 import com.yahoo.searchlib.rankingexpression.evaluation.Value;
 import com.yahoo.tensor.functions.TensorFunction;
 
-import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
 
 public class Constant extends IntermediateOperation {
 
     public Constant(String modelName, String nodeName, OrderedTensorType type) {
-        super(modelName, nodeName, Collections.emptyList());
+        super(modelName, nodeName, List.of());
         this.type = type.rename(vespaName() + "_");
     }
 
diff --git a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/IntermediateOperation.java b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/IntermediateOperation.java
index 52de27891cf..d9f4a4b7f4c 100644
--- a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/IntermediateOperation.java
+++ b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/IntermediateOperation.java
@@ -53,7 +53,7 @@ public abstract class IntermediateOperation {
 
     private final List<String> importWarnings = new ArrayList<>();
     private Value constantValue = null;
-    private List<IntermediateOperation> controlInputs = Collections.emptyList();
+    private List<IntermediateOperation> controlInputs = List.of();
 
     protected Function<OrderedTensorType, Value> constantValueFunction = null;
 
@@ -259,7 +259,7 @@ public abstract class IntermediateOperation {
         if (result == DoubleValue.NaN) {
             if (constantValue != null) {
                 result = constantValue;
-            } else if (inputs.size() == 0) {
+            } else if (inputs.isEmpty()) {
                 if (getConstantValue().isEmpty()) {
                     throw new IllegalArgumentException("Error in evaluating constant for " + name);
                 }
@@ -278,7 +278,7 @@ public abstract class IntermediateOperation {
 
     /** Insert an operation between an input and this one */
     public void insert(IntermediateOperation operationToInsert, int inputNumber) {
-        if ( operationToInsert.inputs.size() > 0 ) {
+        if (!operationToInsert.inputs.isEmpty()) {
             throw new IllegalArgumentException("Operation to insert to '" + name + "' has " +
                                                "existing inputs which is not supported.");
         }
@@ -336,7 +336,7 @@ public abstract class IntermediateOperation {
     public abstract IntermediateOperation withInputs(List<IntermediateOperation> inputs);
 
     String asString(Optional<OrderedTensorType> type) {
-        return type.map(t -> t.toString()).orElse("(unknown)");
+        return type.map(OrderedTensorType::toString).orElse("(unknown)");
     }
 
     /**
@@ -373,7 +373,7 @@ public abstract class IntermediateOperation {
 
     public String toFullString() {
         return "\t" + type + ":\t" + operationName() + "(" +
-               inputs().stream().map(input -> input.toFullString()).collect(Collectors.joining(", ")) +
+               inputs().stream().map(IntermediateOperation::toFullString).collect(Collectors.joining(", ")) +
                ")";
     }
 
diff --git a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/NoOp.java b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/NoOp.java
index ba056d362ac..fa115d8af97 100644
--- a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/NoOp.java
+++ b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/NoOp.java
@@ -5,13 +5,12 @@ import ai.vespa.rankingexpression.importer.OrderedTensorType;
 import com.yahoo.searchlib.rankingexpression.Reference;
 import com.yahoo.tensor.functions.TensorFunction;
 
-import java.util.Collections;
 import java.util.List;
 
 public class NoOp extends IntermediateOperation {
 
     public NoOp(String modelName, String nodeName, List<IntermediateOperation> inputs) {
-        super(modelName, nodeName, Collections.emptyList());  // don't propagate inputs
+        super(modelName, nodeName, List.of());  // don't propagate inputs
     }
 
     @Override
diff --git a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/OnnxConstant.java b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/OnnxConstant.java
index dff548cf319..2e48d65fce2 100644
--- a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/OnnxConstant.java
+++ b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/OnnxConstant.java
@@ -9,7 +9,6 @@ import com.yahoo.searchlib.rankingexpression.evaluation.Value;
 import com.yahoo.tensor.TensorType;
 import com.yahoo.tensor.functions.TensorFunction;
 
-import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
 
@@ -31,7 +30,7 @@ public class OnnxConstant extends IntermediateOperation {
         if (value instanceof TensorValue) {
             type = OrderedTensorType.fromSpec(value.type().toString()).rename(vespaName() + "_");
         } else {
-            type = OrderedTensorType.fromDimensionList(TensorType.Value.DOUBLE, Collections.emptyList());
+            type = OrderedTensorType.fromDimensionList(TensorType.Value.DOUBLE, List.of());
         }
         return type;
     }
diff --git a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/Rename.java b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/Rename.java
index 5a7bbc95889..068c06acd8c 100644
--- a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/Rename.java
+++ b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/Rename.java
@@ -7,7 +7,6 @@ import com.yahoo.searchlib.rankingexpression.Reference;
 import com.yahoo.tensor.TensorType;
 import com.yahoo.tensor.functions.TensorFunction;
 
-import java.util.Collections;
 import java.util.List;
 
 /**
@@ -20,7 +19,7 @@ public class Rename extends IntermediateOperation {
     private String from, to;
 
     public Rename(String modelName, String from, String to, IntermediateOperation input) {
-        super(modelName, "rename", input != null ? List.of(input) : Collections.emptyList());
+        super(modelName, "rename", input != null ? List.of(input) : List.of());
         this.from = from;
         this.to = to;
     }
diff --git a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/Softmax.java b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/Softmax.java
index c4d728e9661..6d0a6c3b04b 100644
--- a/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/Softmax.java
+++ b/model-integration/src/main/java/ai/vespa/rankingexpression/importer/operations/Softmax.java
@@ -10,7 +10,6 @@ import com.yahoo.tensor.functions.ScalarFunctions;
 import com.yahoo.tensor.functions.TensorFunction;
 
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.List;
 
 /**
@@ -77,7 +76,7 @@ public class Softmax extends IntermediateOperation {
     private class SoftmaxPartialOperation extends IntermediateOperation {
 
         private SoftmaxPartialOperation(String modelName, String nodeName, List<IntermediateOperation> inputs) {
-            super(modelName, nodeName + "_partial" , inputs != null ? inputs : Collections.emptyList());
+            super(modelName, nodeName + "_partial" , inputs != null ? inputs : List.of());
         }
 
         @Override