Add method to check configuration path existence, ignoring defaults.

By: FakeNeth <cneth97@gmail.com>

paper-api/src/main/java/org/bukkit/configuration/ConfigurationSection.java

@@ -58,6 +58,25 @@ public interface ConfigurationSection {
      */
     public boolean contains(String path);
 
+    /**
+     * Checks if this {@link ConfigurationSection} contains the given path.
+     * <p>
+     * If the value for the requested path does not exist, the boolean parameter
+     * of true has been specified, a default value for the path exists, this
+     * will return true.
+     * <p>
+     * If a boolean parameter of false has been specified, true will only be
+     * returned if there is a set value for the specified path.
+     *
+     * @param path Path to check for existence.
+     * @param ignoreDefault Whether or not to ignore if a default value for the
+     * specified path exists.
+     * @return True if this section contains the requested path, or if a default
+     * value exist and the boolean parameter for this method is true.
+     * @throws IllegalArgumentException Thrown when path is null.
+     */
+    public boolean contains(String path, boolean ignoreDefault);
+
     /**
      * Checks if this {@link ConfigurationSection} has a value set for the
      * given path.

paper-api/src/main/java/org/bukkit/configuration/MemorySection.java

@@ -103,7 +103,11 @@ public class MemorySection implements ConfigurationSection {
     }
 
     public boolean contains(String path) {
-        return get(path) != null;
+        return contains(path, false);
+    }
+
+    public boolean contains(String path, boolean ignoreDefault) {
+        return ((ignoreDefault) ? get(path, null) : get(path)) != null;
     }
 
     public boolean isSet(String path) {

paper-api/src/test/java/org/bukkit/configuration/ConfigurationSectionTest.java

@@ -91,6 +91,18 @@ public abstract class ConfigurationSectionTest {
 
         assertTrue(section.contains("exists"));
         assertFalse(section.contains("doesnt-exist"));
+
+        assertTrue(section.contains("exists", true));
+        assertTrue(section.contains("exists", false));
+
+        assertFalse(section.contains("doesnt-exist", true));
+        assertFalse(section.contains("doesnt-exist", false));
+
+        section.addDefault("doenst-exist-two", true);
+        section.set("doenst-exist-two", null);
+
+        assertFalse(section.contains("doenst-exist-two", true));
+        assertTrue(section.contains("doenst-exist-two", false));
     }
 
     @Test