[v1] Change public fields to Lombok getters; make concrete classes final

partiql-ast/build.gradle.kts

@@ -16,6 +16,9 @@
 plugins {
     id(Plugins.conventions)
     id(Plugins.publish)
+    // Need the Kotlin lombok plugin to allow for Kotlin code in partiql-ast to understand Java Lombok annotations.
+    // https://kotlinlang.org/docs/lombok.html
+    id(Plugins.kotlinLombok) version Versions.kotlinLombok
 }
 
 dependencies {

partiql-ast/src/main/java/org/partiql/ast/AstVisitor.java

@@ -3,7 +3,6 @@
 import org.partiql.ast.ddl.AttributeConstraint;
 import org.partiql.ast.ddl.ColumnDefinition;
 import org.partiql.ast.ddl.CreateTable;
-import org.partiql.ast.ddl.Ddl;
 import org.partiql.ast.ddl.KeyValue;
 import org.partiql.ast.ddl.PartitionBy;
 import org.partiql.ast.ddl.TableConstraint;
@@ -88,10 +87,6 @@ public R visitStatement(Statement node, C ctx) {
     //
     // DDL
     //
-    public R visitDdl(Ddl node, C ctx) {
-        return defaultVisit(node, ctx);
-    }
-
     public R visitCreateTable(CreateTable node, C ctx) {
         return defaultVisit(node, ctx);
     }

partiql-ast/src/main/java/org/partiql/ast/DataType.java

@@ -1,6 +1,7 @@
 package org.partiql.ast;
 
 import lombok.EqualsAndHashCode;
+import lombok.Getter;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.partiql.ast.ddl.AttributeConstraint;
@@ -9,7 +10,7 @@
 import java.util.List;
 
 @EqualsAndHashCode(callSuper = false)
-public class DataType extends AstEnum {
+public final class DataType extends AstEnum {
     /**
      * A field definition with in a Struct Type Definition
      */
@@ -28,26 +29,30 @@ public class DataType extends AstEnum {
     @EqualsAndHashCode(callSuper = false)
     public static class StructField extends AstNode {
         @NotNull
-        public final Identifier name;
+        @Getter
+        private final Identifier name;
+
         @NotNull
-        public final DataType type;
+        @Getter
+        private final DataType type;
 
-        public final boolean isOptional;
+        @Getter
+        private final boolean optional;
 
         @Nullable
-        public final List<AttributeConstraint> constraints;
+        private final List<AttributeConstraint> constraints;
         @Nullable
-        public final String comment;
+        private final String comment;
 
         public StructField(
                 @NotNull Identifier name,
                 @NotNull DataType type,
-                boolean isOptional,
+                boolean optional,
                 @Nullable List<AttributeConstraint> constraints,
                 @Nullable String comment) {
             this.name = name;
             this.type = type;
-            this.isOptional = isOptional;
+            this.optional = optional;
             this.constraints = constraints;
             this.comment = comment;
         }

partiql-ast/src/main/java/org/partiql/ast/DatetimeField.java

@@ -10,7 +10,7 @@
  * TODO docs, equals, hashcode
  */
 @EqualsAndHashCode(callSuper = false)
-public class DatetimeField extends AstEnum {
+public final class DatetimeField extends AstEnum {
     public static final int YEAR = 0;
     public static final int MONTH = 1;
     public static final int DAY = 2;

partiql-ast/src/main/java/org/partiql/ast/Exclude.java

@@ -2,6 +2,7 @@
 
 import lombok.Builder;
 import lombok.EqualsAndHashCode;
+import lombok.Getter;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
@@ -12,9 +13,10 @@
  */
 @Builder(builderClassName = "Builder")
 @EqualsAndHashCode(callSuper = false)
-public class Exclude extends AstNode {
+public final class Exclude extends AstNode {
     @NotNull
-    public final List<ExcludePath> excludePaths;
+    @Getter
+    private final List<ExcludePath> excludePaths;
 
     public Exclude(@NotNull List<ExcludePath> excludePaths) {
         this.excludePaths = excludePaths;

partiql-ast/src/main/java/org/partiql/ast/ExcludePath.java

@@ -2,6 +2,7 @@
 
 import lombok.Builder;
 import lombok.EqualsAndHashCode;
+import lombok.Getter;
 import org.jetbrains.annotations.NotNull;
 import org.partiql.ast.expr.ExprVarRef;
 
@@ -13,12 +14,14 @@
  */
 @Builder(builderClassName = "Builder")
 @EqualsAndHashCode(callSuper = false)
-public class ExcludePath extends AstNode {
+public final class ExcludePath extends AstNode {
     @NotNull
-    public final ExprVarRef root;
+    @Getter
+    private final ExprVarRef root;
 
     @NotNull
-    public final List<ExcludeStep> excludeSteps;
+    @Getter
+    private final List<ExcludeStep> excludeSteps;
 
     public ExcludePath(@NotNull ExprVarRef root, @NotNull List<ExcludeStep> excludeSteps) {
         this.root = root;

partiql-ast/src/main/java/org/partiql/ast/ExcludeStep.java

@@ -2,6 +2,7 @@
 
 import lombok.Builder;
 import lombok.EqualsAndHashCode;
+import lombok.Getter;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
@@ -18,7 +19,8 @@ public abstract class ExcludeStep extends AstNode {
     @EqualsAndHashCode(callSuper = false)
     public static class StructField extends ExcludeStep {
         @NotNull
-        public final Identifier symbol;
+        @Getter
+        private final Identifier symbol;
 
         public StructField(@NotNull Identifier symbol) {
             this.symbol = symbol;
@@ -44,7 +46,8 @@ public <R, C> R accept(@NotNull AstVisitor<R, C> visitor, C ctx) {
     @Builder(builderClassName = "Builder")
     @EqualsAndHashCode(callSuper = false)
     public static class CollIndex extends ExcludeStep {
-        public final int index;
+        @Getter
+        private final int index;
 
         public CollIndex(int index) {
             this.index = index;

partiql-ast/src/main/java/org/partiql/ast/Explain.java

@@ -2,6 +2,7 @@
 
 import lombok.Builder;
 import lombok.EqualsAndHashCode;
+import lombok.Getter;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
@@ -13,12 +14,14 @@
  */
 @Builder(builderClassName = "Builder")
 @EqualsAndHashCode(callSuper = false)
-public class Explain extends Statement {
+public final class Explain extends Statement {
     @NotNull
-    public final Map<String, Literal> options;
+    @Getter
+    private final Map<String, Literal> options;
 
     @NotNull
-    public final Statement statement;
+    @Getter
+    private final Statement statement;
 
     public Explain(@NotNull Map<String, Literal> options, @NotNull Statement statement) {
         this.options = options;

partiql-ast/src/main/java/org/partiql/ast/From.java

@@ -2,6 +2,7 @@
 
 import lombok.Builder;
 import lombok.EqualsAndHashCode;
+import lombok.Getter;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
@@ -12,9 +13,10 @@
  */
 @Builder(builderClassName = "Builder")
 @EqualsAndHashCode(callSuper = false)
-public class From extends AstNode {
+public final class From extends AstNode {
     @NotNull
-    public final List<FromTableRef> tableRefs;
+    @Getter
+    private final List<FromTableRef> tableRefs;
 
     public From(@NotNull List<FromTableRef> tableRefs) {
         this.tableRefs = tableRefs;

partiql-ast/src/main/java/org/partiql/ast/FromExpr.java

@@ -2,6 +2,7 @@
 
 import lombok.Builder;
 import lombok.EqualsAndHashCode;
+import lombok.Getter;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.partiql.ast.expr.Expr;
@@ -14,18 +15,22 @@
  */
 @Builder(builderClassName = "Builder")
 @EqualsAndHashCode(callSuper = false)
-public class FromExpr extends FromTableRef {
+public final class FromExpr extends FromTableRef {
     @NotNull
-    public final Expr expr;
+    @Getter
+    private final Expr expr;
 
     @NotNull
-    public final FromType fromType;
+    @Getter
+    private final FromType fromType;
 
     @Nullable
-    public final Identifier asAlias;
+    @Getter
+    private final Identifier asAlias;
 
     @Nullable
-    public final Identifier atAlias;
+    @Getter
+    private final Identifier atAlias;
 
     public FromExpr(@NotNull Expr expr, @NotNull FromType fromType, @Nullable Identifier asAlias,
                     @Nullable Identifier atAlias) {

partiql-ast/src/main/java/org/partiql/ast/FromJoin.java

@@ -2,6 +2,7 @@
 
 import lombok.Builder;
 import lombok.EqualsAndHashCode;
+import lombok.Getter;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.partiql.ast.expr.Expr;
@@ -14,18 +15,22 @@
  */
 @Builder(builderClassName = "Builder")
 @EqualsAndHashCode(callSuper = false)
-public class FromJoin extends FromTableRef {
+public final class FromJoin extends FromTableRef {
     @NotNull
-    public final FromTableRef lhs;
+    @Getter
+    private final FromTableRef lhs;
 
     @NotNull
-    public final FromTableRef rhs;
+    @Getter
+    private final FromTableRef rhs;
 
     @Nullable
-    public final JoinType joinType;
+    @Getter
+    private final JoinType joinType;
 
     @Nullable
-    public final Expr condition;
+    @Getter
+    private final Expr condition;
 
     public FromJoin(@NotNull FromTableRef lhs, @NotNull FromTableRef rhs, @Nullable JoinType joinType, @Nullable Expr condition) {
         this.lhs = lhs;

partiql-ast/src/main/java/org/partiql/ast/FromType.java

@@ -10,7 +10,7 @@
  * TODO docs, equals, hashcode
  */
 @EqualsAndHashCode(callSuper = false)
-public class FromType extends AstEnum {
+public final class FromType extends AstEnum {
     public static final int SCAN = 0;
     public static final int UNPIVOT = 1;
 

partiql-ast/src/main/java/org/partiql/ast/GroupBy.java

@@ -2,6 +2,7 @@
 
 import lombok.Builder;
 import lombok.EqualsAndHashCode;
+import lombok.Getter;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.partiql.ast.expr.Expr;
@@ -14,15 +15,18 @@
  */
 @Builder(builderClassName = "Builder")
 @EqualsAndHashCode(callSuper = false)
-public class GroupBy extends AstNode {
+public final class GroupBy extends AstNode {
     @NotNull
-    public final GroupByStrategy strategy;
+    @Getter
+    private final GroupByStrategy strategy;
 
     @NotNull
-    public final List<Key> keys;
+    @Getter
+    private final List<Key> keys;
 
     @Nullable
-    public final Identifier asAlias;
+    @Getter
+    private final Identifier asAlias;
 
     public GroupBy(@NotNull GroupByStrategy strategy, @NotNull List<Key> keys, @Nullable Identifier asAlias) {
         this.strategy = strategy;
@@ -52,10 +56,12 @@ public <R, C> R accept(@NotNull AstVisitor<R, C> visitor, C ctx) {
     @EqualsAndHashCode(callSuper = false)
     public static class Key extends AstNode {
         @NotNull
-        public final Expr expr;
+        @Getter
+        private final Expr expr;
 
         @Nullable
-        public final Identifier asAlias;
+        @Getter
+        private final Identifier asAlias;
 
         public Key(@NotNull Expr expr, @Nullable Identifier asAlias) {
         this.expr = expr;

partiql-ast/src/main/java/org/partiql/ast/GroupByStrategy.java

@@ -10,7 +10,7 @@
  * TODO docs, equals, hashcode
  */
 @EqualsAndHashCode(callSuper = false)
-public class GroupByStrategy extends AstEnum {
+public final class GroupByStrategy extends AstEnum {
     public static final int FULL = 0;
     public static final int PARTIAL = 1;
 

partiql-ast/src/main/java/org/partiql/ast/Identifier.java

@@ -2,6 +2,7 @@
 
 import lombok.Builder;
 import lombok.EqualsAndHashCode;
+import lombok.Getter;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
@@ -12,15 +13,17 @@
  */
 @Builder(builderClassName = "Builder")
 @EqualsAndHashCode(callSuper = false)
-public class Identifier extends AstNode {
+public final class Identifier extends AstNode {
     @NotNull
-    public final String symbol;
+    @Getter
+    private final String symbol;
 
-    public final boolean isDelimited;
+    @Getter
+    private final boolean delimited;
 
-    public Identifier(@NotNull String symbol, boolean isDelimited) {
+    public Identifier(@NotNull String symbol, boolean delimited) {
         this.symbol = symbol;
-        this.isDelimited = isDelimited;
+        this.delimited = delimited;
     }
 
     @NotNull