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Added JsonObject method isEmpty() #2233

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merged 3 commits into from
Nov 13, 2022
Merged

Added JsonObject method isEmpty() #2233

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90db072
Added isEmpty()
dhoard Nov 4, 2022
5ff17d1
Fixed Javadoc typo
dhoard Nov 9, 2022
f35f2a6
Changed test to use assertTrue() and assertFalse()
dhoard Nov 9, 2022
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10 changes: 10 additions & 0 deletions gson/src/main/java/com/google/gson/JsonObject.java
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Original file line number Diff line number Diff line change
Expand Up @@ -155,6 +155,16 @@ public int size() {
return members.size();
}

/**
* Returns true if the number of key/value pairs in the object is zero.
*
* @return true if the number of key/value pairs in the object is zero.
* @since $next-version$
*/
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public boolean isEmpty() {
return members.size() == 0;
}

/**
* Convenience method to check if a member with the specified name is present in this object.
*
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12 changes: 12 additions & 0 deletions gson/src/test/java/com/google/gson/JsonObjectTest.java
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Expand Up @@ -222,6 +222,18 @@ public void testSize() {
assertEquals(1, o.size());
}

@Test
public void testIsEmpty() {
JsonObject o = new JsonObject();
assertTrue(o.isEmpty());

o.add("Hello", new JsonPrimitive(1));
assertFalse(o.isEmpty());

o.remove("Hello");
assertTrue(o.isEmpty());
}

@Test
public void testDeepCopy() {
JsonObject original = new JsonObject();
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