Fixes #1193: add BufferRecycler.Gettable, impls for BAB, SSW (#1194)

src/main/java/com/fasterxml/jackson/core/io/SegmentedStringWriter.java

@@ -13,7 +13,10 @@
  * if so, instance of this class can be given as the writer to
  * <code>JsonGenerator</code>.
  */
-public final class SegmentedStringWriter extends Writer {
+public final class SegmentedStringWriter
+    extends Writer
+    implements BufferRecycler.Gettable
+{
     final private TextBuffer _buffer;
 
     public SegmentedStringWriter(BufferRecycler br) {
@@ -22,9 +25,20 @@ public SegmentedStringWriter(BufferRecycler br) {
     }
 
     /*
-    /**********************************************************
+    /**********************************************************************
+    /* BufferRecycler.Gettable implementation
+    /**********************************************************************
+     */
+
+    @Override
+    public BufferRecycler bufferRecycler() {
+        return _buffer.bufferRecycler();
+    }
+
+    /*
+    /**********************************************************************
     /* java.io.Writer implementation
-    /**********************************************************
+    /**********************************************************************
      */
 
     @Override
@@ -59,6 +73,7 @@ public void write(char[] cbuf) throws IOException {
     }
 
     @Override
+
     public void write(char[] cbuf, int off, int len) throws IOException {
         _buffer.append(cbuf, off, len);
     }
@@ -79,9 +94,9 @@ public void write(String str, int off, int len) throws IOException {
     }
 
     /*
-    /**********************************************************
+    /**********************************************************************
     /* Extended API
-    /**********************************************************
+    /**********************************************************************
      */
 
     /**

src/main/java/com/fasterxml/jackson/core/util/BufferRecycler.java

@@ -20,6 +20,20 @@
 public class BufferRecycler
     implements RecyclerPool.WithPool<BufferRecycler>
 {
+    /**
+     * Tag-on interface to allow various other types to expose {@link BufferRecycler}
+     * they are constructed with.
+     *
+     * @since 2.17
+     */
+    public interface Gettable {
+        /**
+         * @return Buffer recycler instance object is configured with, if any;
+         *    whether this can be {@code null} depends on type of object
+         */
+        public BufferRecycler bufferRecycler();
+    }
+
     /**
      * Buffer used for reading byte-based input.
      */

src/main/java/com/fasterxml/jackson/core/util/ByteArrayBuilder.java

@@ -26,7 +26,9 @@
  * theoretically this builder can aggregate more content it will not be usable
  * as things are. Behavior may be improved if we solve the access problem.
  */
-public final class ByteArrayBuilder extends OutputStream
+public final class ByteArrayBuilder
+    extends OutputStream
+    implements BufferRecycler.Gettable
 {
     public final static byte[] NO_BYTES = new byte[0];
 
@@ -180,6 +182,17 @@ public byte[] toByteArray()
         return result;
     }
 
+    /*
+    /**********************************************************
+    /* BufferRecycler.Gettable implementation
+    /**********************************************************
+     */
+
+    @Override
+    public BufferRecycler bufferRecycler() {
+        return _bufferRecycler;
+    }
+
     /*
     /**********************************************************
     /* Non-stream API (similar to TextBuffer)

src/main/java/com/fasterxml/jackson/core/util/TextBuffer.java

@@ -372,6 +372,13 @@ private void clearSegments()
     /**********************************************************
      */
 
+    /**
+     * @since 2.17
+     */
+    public BufferRecycler bufferRecycler() {
+        return _allocator;
+    }
+
     /**
      * @return Number of characters currently stored in this buffer
      */