Rename JsonSchemaWalker to Walker

Author: justin-tay

src/main/java/com/networknt/schema/JsonSchemaValidator.java

@@ -17,12 +17,12 @@
 package com.networknt.schema;
 
 import com.fasterxml.jackson.databind.JsonNode;
-import com.networknt.schema.walk.JsonSchemaWalker;
+import com.networknt.schema.walk.Walker;
 
 /**
  * Standard json validator interface, implemented by all validators and JsonSchema.
  */
-public interface JsonSchemaValidator extends JsonSchemaWalker {
+public interface JsonSchemaValidator extends Walker {
     /**
      * Validate the given JsonNode, the given node is the child node of the root node at given
      * data path.

src/main/java/com/networknt/schema/walk/JsonSchemaWalker.java

@@ -0,0 +1,30 @@
+package com.networknt.schema.walk;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.networknt.schema.JsonSchemaValidator;
+import com.networknt.schema.ExecutionContext;
+import com.networknt.schema.JsonNodePath;
+
+public interface Walker {
+    /**
+     * 
+     * This method gives the capability to walk through the given JsonNode, allowing
+     * functionality beyond validation like collecting information,handling
+     * cross-cutting concerns like logging or instrumentation. This method also
+     * performs the validation if {@code shouldValidateSchema} is set to true. <br>
+     * <br>
+     * {@link JsonSchemaValidator#walk(ExecutionContext, JsonNode, JsonNode, JsonNodePath, boolean)}
+     * provides a default implementation of this method. However, validators that
+     * parse sub-schemas should override this method to call walk method on those
+     * sub-schemas.
+     * 
+     * @param executionContext     the execution context
+     * @param instanceNode         the instance node being processed
+     * @param instance             the instance document that the instance node
+     *                             belongs to
+     * @param instanceLocation     the location of the instance node being processed
+     * @param shouldValidateSchema true to validate the schema while walking
+     */
+    void walk(ExecutionContext executionContext, JsonNode instanceNode, JsonNode instance,
+            JsonNodePath instanceLocation, boolean shouldValidateSchema);
+}