From f1062448e100c6eddc48137f7e99b853063ec425 Mon Sep 17 00:00:00 2001
From: Marcono1234 <Marcono1234@users.noreply.github.com>
Date: Tue, 11 Feb 2020 14:03:51 +0100
Subject: [PATCH] Throw UnsupportedOperationException when JsonWriter.jsonValue
 is not supported

---
 .../com/google/gson/internal/bind/JsonTreeWriter.java  |  4 ++++
 .../main/java/com/google/gson/stream/JsonWriter.java   |  5 ++++-
 .../google/gson/internal/bind/JsonTreeWriterTest.java  | 10 ++++++++++
 3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/gson/src/main/java/com/google/gson/internal/bind/JsonTreeWriter.java b/gson/src/main/java/com/google/gson/internal/bind/JsonTreeWriter.java
index 51dc1f3a34..df60cd634d 100644
--- a/gson/src/main/java/com/google/gson/internal/bind/JsonTreeWriter.java
+++ b/gson/src/main/java/com/google/gson/internal/bind/JsonTreeWriter.java
@@ -149,6 +149,10 @@ private void put(JsonElement value) {
     return this;
   }
 
+  @Override public JsonWriter jsonValue(String value) throws IOException {
+    throw new UnsupportedOperationException();
+  }
+
   @Override public JsonWriter nullValue() throws IOException {
     put(JsonNull.INSTANCE);
     return this;
diff --git a/gson/src/main/java/com/google/gson/stream/JsonWriter.java b/gson/src/main/java/com/google/gson/stream/JsonWriter.java
index 84eaa0a7c4..855798b1d3 100644
--- a/gson/src/main/java/com/google/gson/stream/JsonWriter.java
+++ b/gson/src/main/java/com/google/gson/stream/JsonWriter.java
@@ -421,10 +421,13 @@ public JsonWriter value(String value) throws IOException {
 
   /**
    * Writes {@code value} directly to the writer without quoting or
-   * escaping.
+   * escaping. This might not be supported by all implementations, if
+   * not supported an {@code UnsupportedOperationException} is thrown.
    *
    * @param value the literal string value, or null to encode a null literal.
    * @return this writer.
+   * @throws UnsupportedOperationException if this writer does not support
+   *    writing raw JSON values.
    */
   public JsonWriter jsonValue(String value) throws IOException {
     if (value == null) {
diff --git a/gson/src/test/java/com/google/gson/internal/bind/JsonTreeWriterTest.java b/gson/src/test/java/com/google/gson/internal/bind/JsonTreeWriterTest.java
index cc04dbc324..3f537d3655 100644
--- a/gson/src/test/java/com/google/gson/internal/bind/JsonTreeWriterTest.java
+++ b/gson/src/test/java/com/google/gson/internal/bind/JsonTreeWriterTest.java
@@ -172,4 +172,14 @@ public void testStrictBoxedNansAndInfinities() throws IOException {
     } catch (IllegalArgumentException expected) {
     }
   }
+
+  public void testJsonValue() throws IOException {
+    JsonTreeWriter writer = new JsonTreeWriter();
+    writer.beginArray();
+    try {
+      writer.jsonValue("test");
+      fail();
+    } catch (UnsupportedOperationException expected) {
+    }
+  }
 }