fix: set default maximum nesting depth as 512

src/main/java/org/json/XMLParserConfiguration.java

@@ -22,6 +22,11 @@ public class XMLParserConfiguration {
      */
     public static final int UNDEFINED_MAXIMUM_NESTING_DEPTH = -1;
 
+    /**
+     * The default maximum nesting depth when parsing a XML document to JSON.
+     */
+    public static final int DEFAULT_MAXIMUM_NESTING_DEPTH = 512;
+
     /** Original Configuration of the XML Parser. */
     public static final XMLParserConfiguration ORIGINAL
         = new XMLParserConfiguration();
@@ -64,7 +69,7 @@ public class XMLParserConfiguration {
      * When parsing the XML into JSON, specifies the tags whose values should be converted
      * to arrays
      */
-    private int maxNestingDepth = UNDEFINED_MAXIMUM_NESTING_DEPTH;
+    private int maxNestingDepth = DEFAULT_MAXIMUM_NESTING_DEPTH;
 
     /**
      * Default parser configuration. Does not keep strings (tries to implicitly convert
@@ -321,8 +326,8 @@ public int getMaxNestingDepth() {
 
     /**
      * Defines the maximum nesting depth that the parser will descend before throwing an exception
-     * when parsing the XML into JSON. The default max nesting depth is undefined, which means the
-     * parser will go as deep as the maximum call stack size allows. Using any negative value as a
+     * when parsing the XML into JSON. The default max nesting depth is 512, which means the parser
+     * will go as deep as the maximum call stack size allows. Using any negative value as a
      * parameter is equivalent to setting no limit to the nesting depth.
      * @param maxNestingDepth the maximum nesting depth allowed to the XML parser
      * @return The existing configuration will not be modified. A new configuration is returned.

src/test/java/org/json/junit/JSONArrayTest.java

@@ -6,7 +6,6 @@
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertNotEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;

src/test/java/org/json/junit/XMLConfigurationTest.java

@@ -1056,7 +1056,7 @@ public void testEmptyTagForceList() {
     public void testMaxNestingDepthIsSet() {
         XMLParserConfiguration xmlParserConfiguration = XMLParserConfiguration.ORIGINAL;
 
-        assertEquals(xmlParserConfiguration.getMaxNestingDepth(), XMLParserConfiguration.UNDEFINED_MAXIMUM_NESTING_DEPTH);
+        assertEquals(xmlParserConfiguration.getMaxNestingDepth(), XMLParserConfiguration.DEFAULT_MAXIMUM_NESTING_DEPTH);
 
         xmlParserConfiguration = xmlParserConfiguration.withMaxNestingDepth(42);