[GitHub] [flink] slinkydeveloper commented on a change in pull request #17550: [FLINK-24599][table] Replace static methods with member methods

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slinkydeveloper commented on a change in pull request #17550:
URL: https://github.com/apache/flink/pull/17550#discussion_r735307913



##########
File path: flink-table/flink-table-common/src/main/java/org/apache/flink/table/types/logical/LogicalType.java
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@@ -77,6 +77,33 @@ public LogicalTypeRoot getTypeRoot() {
         return typeRoot;
     }
 
+    /**
+     * Returns whether the root of the type equals to the {@code typeRoot} or not.
+     *
+     * @param typeRoot The root type to check against for equality
+     */
+    public boolean is(LogicalTypeRoot typeRoot) {
+        return this.typeRoot == typeRoot;
+    }
+
+    /**
+     * Returns whether the root of the type equals to at least on of the {@code typeRoots} or not.
+     *
+     * @param typeRoots The root types to check against for equality
+     */
+    public boolean isAnyOf(LogicalTypeRoot... typeRoots) {
+        return Arrays.stream(typeRoots).anyMatch(tr -> this.typeRoot == tr);
+    }
+
+    /**
+     * Returns whether the family type of the type equals to the {@code family} or not.
+     *
+     * @param family The family type to check against for equality
+     */
+    public boolean is(LogicalTypeFamily family) {

Review comment:
       Naming this method `is` seems not correct to me, for two reasons: family is a set, and also `is` is already defined with `typeRoot` argument. Perhaps `isFamily` is better?




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