ESQL: TOP aggregation IP support (elastic#111105)

Added IP support to TOP() aggregation.

Adapted a bit the stringtemplates organization for esql/compute to
(also?) work with specific datatypes. Right now it may be a bit messy,
but we need the specific support for cases like this.

docs/changelog/111105.yaml

@@ -0,0 +1,5 @@
+pr: 111105
+summary: "ESQL: TOP aggregation IP support"
+area: ES|QL
+type: feature
+issues: []

x-pack/plugin/esql/compute/build.gradle

@@ -36,32 +36,40 @@ spotless {
   }
 }
 
-def prop(Type, type, Wrapper, TYPE, BYTES, Array, Hash) {
+def prop(Name, Type, type, Wrapper, TYPE, BYTES, Array, Hash) {
   return [
+    // Name of the DataType. Use in DataType names
+    "Name" : Name,
+    // PascalCased type. Use in ElementType names
     "Type" : Type,
+    // Variable type. May be a primitive
     "type" : type,
+    // Wrapper type. Only for primitive types
     "Wrapper": Wrapper,
+    // SCREAMING_SNAKE_CASE type. Use in ElementType names
     "TYPE" : TYPE,
     "BYTES" : BYTES,
     "Array" : Array,
     "Hash" : Hash,
 
-    "int" : type == "int" ? "true" : "",
-    "float" : type == "float" ? "true" : "",
-    "long" : type == "long" ? "true" : "",
-    "double" : type == "double" ? "true" : "",
-    "BytesRef" : type == "BytesRef" ? "true" : "",
-    "boolean" : type == "boolean" ? "true" : "",
+    "int" : Name == "Int" ? "true" : "",
+    "float" : Name == "Float" ? "true" : "",
+    "long" : Name == "Long" ? "true" : "",
+    "double" : Name == "Double" ? "true" : "",
+    "boolean" : Name == "Boolean" ? "true" : "",
+    "BytesRef" : Name == "BytesRef" ? "true" : "",
+    "Ip" : Name == "Ip" ? "true" : "",
   ]
 }
 
 tasks.named('stringTemplates').configure {
-  var intProperties      = prop("Int", "int", "Integer", "INT", "Integer.BYTES", "IntArray", "LongHash")
-  var floatProperties    = prop("Float", "float", "Float", "FLOAT", "Float.BYTES", "FloatArray", "LongHash")
-  var longProperties     = prop("Long", "long", "Long", "LONG", "Long.BYTES", "LongArray", "LongHash")
-  var doubleProperties   = prop("Double", "double", "Double", "DOUBLE", "Double.BYTES", "DoubleArray", "LongHash")
-  var bytesRefProperties = prop("BytesRef", "BytesRef", "", "BYTES_REF", "org.apache.lucene.util.RamUsageEstimator.NUM_BYTES_OBJECT_REF", "", "BytesRefHash")
-  var booleanProperties  = prop("Boolean", "boolean", "Boolean", "BOOLEAN", "Byte.BYTES", "BitArray", "")
+  var intProperties      = prop("Int", "Int", "int", "Integer", "INT", "Integer.BYTES", "IntArray", "LongHash")
+  var floatProperties    = prop("Float", "Float", "float", "Float", "FLOAT", "Float.BYTES", "FloatArray", "LongHash")
+  var longProperties     = prop("Long", "Long", "long", "Long", "LONG", "Long.BYTES", "LongArray", "LongHash")
+  var doubleProperties   = prop("Double", "Double", "double", "Double", "DOUBLE", "Double.BYTES", "DoubleArray", "LongHash")
+  var booleanProperties  = prop("Boolean", "Boolean", "boolean", "Boolean", "BOOLEAN", "Byte.BYTES", "BitArray", "")
+  var bytesRefProperties = prop("BytesRef", "BytesRef", "BytesRef", "", "BYTES_REF", "org.apache.lucene.util.RamUsageEstimator.NUM_BYTES_OBJECT_REF", "", "BytesRefHash")
+  var ipProperties       = prop("Ip", "BytesRef", "BytesRef", "", "BYTES_REF", "16", "", "")
 
   // primitive vectors
   File vectorInputFile = new File("${projectDir}/src/main/java/org/elasticsearch/compute/data/X-Vector.java.st")
@@ -554,6 +562,16 @@ tasks.named('stringTemplates').configure {
     it.inputFile =  topAggregatorInputFile
     it.outputFile = "org/elasticsearch/compute/aggregation/TopDoubleAggregator.java"
   }
+  template {
+    it.properties = booleanProperties
+    it.inputFile =  topAggregatorInputFile
+    it.outputFile = "org/elasticsearch/compute/aggregation/TopBooleanAggregator.java"
+  }
+  template {
+    it.properties = ipProperties
+    it.inputFile =  topAggregatorInputFile
+    it.outputFile = "org/elasticsearch/compute/aggregation/TopIpAggregator.java"
+  }
 
   File multivalueDedupeInputFile = file("src/main/java/org/elasticsearch/compute/operator/mvdedupe/X-MultivalueDedupe.java.st")
   template {