Fix #1401: rename TreeNode.isContainerNode() as isContainer()

release-notes/VERSION

@@ -52,6 +52,7 @@ JSON library.
 #1380: Change 3.0 to use `module-info.java` directly (and not via Moditect)
 #1385: Create `jackson-core-[VERSION]-tests.jar` to contain shared
   test utility classes
+#1401: Rename `TreeNode.isContainerNode()` as `isContainer()` (3.0)
 - Rename `JsonGenerator.Feature.AUTO_CLOSE_JSON_CONTENT` as `AUTO_CLOSE_CONTENT`
 - Add `TreeCodec.nullNode()`, `TreeNode.isNull()` methods
 - Change the way `JsonLocation.NA` is included in exception messages

src/main/java/tools/jackson/core/TreeNode.java

@@ -61,7 +61,7 @@ public interface TreeNode
      * and null values from JSON.
      *<p>
      * Note: one and only one of methods {@link #isValueNode},
-     * {@link #isContainerNode} and {@link #isMissingNode} ever
+     * {@link #isContainer()} and {@link #isMissingNode} ever
      * returns true for any given node.
      *
      * @return True if this node is considered a value node; something that
@@ -73,20 +73,20 @@ public interface TreeNode
      * Method that returns true for container nodes: Arrays and Objects.
      *<p>
      * Note: one and only one of methods {@link #isValueNode},
-     * {@link #isContainerNode} and {@link #isMissingNode} ever
+     * {@link #isContainer()} and {@link #isMissingNode} ever
      * returns true for any given node.
      *
      * @return {@code True} for Array and Object nodes, {@code false} otherwise
      */
-    boolean isContainerNode();
+    boolean isContainer();
 
     /**
      * Method that returns true for "virtual" nodes which represent
      * missing entries constructed by path accessor methods when
      * there is no actual node matching given criteria.
      *<p>
      * Note: one and only one of methods {@link #isValueNode},
-     * {@link #isContainerNode} and {@link #isMissingNode} ever
+     * {@link #isContainer()} and {@link #isMissingNode} ever
      * returns true for any given node.
      *
      * @return {@code True} if this node represents a "missing" node
@@ -96,7 +96,7 @@ public interface TreeNode
     /**
      * Method that returns true if this node is an Array node, false
      * otherwise.
-     * Note that if true is returned, {@link #isContainerNode}
+     * Note that if true is returned, {@link #isContainer()}
      * must also return true.
      *
      * @return {@code True} for Array nodes, {@code false} for everything else
@@ -106,7 +106,7 @@ public interface TreeNode
     /**
      * Method that returns true if this node is an Object node, false
      * otherwise.
-     * Note that if true is returned, {@link #isContainerNode}
+     * Note that if true is returned, {@link #isContainer()}
      * must also return true.
      *
      * @return {@code True} for Object nodes, {@code false} for everything else

src/test/java/tools/jackson/core/unittest/util/DelegatesTest.java

@@ -55,7 +55,7 @@ public boolean isValueNode() {
         }
 
         @Override
-        public boolean isContainerNode() {
+        public boolean isContainer() {
             return false;
         }