Reverting removal of NullOutputStream for backwards compatibility

core-common/src/main/java/org/glassfish/jersey/message/internal/NullOutputStream.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2024 Oracle and/or its affiliates. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0, which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the
+ * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
+ * version 2 with the GNU Classpath Exception, which is available at
+ * https://www.gnu.org/software/classpath/license.html.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
+ */
+
+package org.glassfish.jersey.message.internal;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.Objects;
+
+import org.glassfish.jersey.internal.LocalizationMessages;
+
+/**
+ * Since JDK 11 is replaced by {@link OutputStream#nullOutputStream()}
+ */
+@Deprecated(since = "3.1.7", forRemoval = true)
+public class NullOutputStream extends OutputStream {
+
+    private volatile boolean isClosed;
+
+    @Override
+    public void write(int b) throws IOException {
+        checkClosed();
+    }
+
+    @Override
+    public void write(byte[] b, int off, int len) throws IOException {
+        checkClosed();
+        Objects.checkFromIndexSize(off, len, b.length);
+    }
+
+    @Override
+    public void flush() throws IOException {
+        checkClosed();
+    }
+
+    private void checkClosed() throws IOException {
+        if (isClosed) {
+            throw new IOException(LocalizationMessages.OUTPUT_STREAM_CLOSED());
+        }
+    }
+
+    @Override
+    public void close() throws IOException {
+        isClosed = true;
+    }
+}