From 146546ec021b3386cd544221e40c66eca88c13db Mon Sep 17 00:00:00 2001
From: fpinatares <fpinatares@gmail.com>
Date: Fri, 21 Oct 2022 19:13:01 +0200
Subject: [PATCH] Creates function to know if a jsonPath is a function or not

---
 .../src/main/java/com/jayway/jsonpath/JsonPath.java   | 11 +++++++++++
 .../java/com/jayway/jsonpath/PathCompilerTest.java    |  6 ++++++
 2 files changed, 17 insertions(+)

diff --git a/json-path/src/main/java/com/jayway/jsonpath/JsonPath.java b/json-path/src/main/java/com/jayway/jsonpath/JsonPath.java
index 01c7db03..2965e538 100644
--- a/json-path/src/main/java/com/jayway/jsonpath/JsonPath.java
+++ b/json-path/src/main/java/com/jayway/jsonpath/JsonPath.java
@@ -496,6 +496,17 @@ public class JsonPath {
         }
     }
 
+    /**
+     * As JsonPath accepts a vary number of functions like min(), max(),
+     * avg(), stddev(), length(), sum(), keys(), concat(X), append(X),
+     * this function will return true if the path is a function
+     *
+     * @return true if the path is a function
+     */
+    public Boolean isFunctionPath() {
+        return path.isFunctionPath();
+    }
+
     // --------------------------------------------------------
     //
     // Static factory methods
diff --git a/json-path/src/test/java/com/jayway/jsonpath/PathCompilerTest.java b/json-path/src/test/java/com/jayway/jsonpath/PathCompilerTest.java
index ef220619..e65159d9 100644
--- a/json-path/src/test/java/com/jayway/jsonpath/PathCompilerTest.java
+++ b/json-path/src/test/java/com/jayway/jsonpath/PathCompilerTest.java
@@ -304,6 +304,12 @@ public class PathCompilerTest {
         assertThat(compile("$.aaa.foo(5,10,15)").toString()).isEqualTo("$['aaa'].foo(...)");
     }
 
+    @Test
+    public void path_is_a_function() {
+        assertThat(compile("concat($.aaa, $.bbb)").isFunctionPath()).isTrue();
+        assertThat(compile("$.aaa").isFunctionPath()).isFalse();
+    }
+
     @Test(expected = InvalidPathException.class)
     public void array_indexes_must_be_separated_by_commas() {
         compile("$[0, 1, 2 4]");