Added partial string support to Utf8Appendable

jetty-websocket/websocket-common/src/main/java/org/eclipse/jetty/websocket/common/message/Utf8CharBuffer.java

@@ -30,6 +30,10 @@ import org.eclipse.jetty.util.Utf8Appendable;
  */
 public class Utf8CharBuffer extends Utf8Appendable
 {
+    // TODO this class does not correctly implement the Appendable contract.
+    // The length is currently the capacity, but it should be the number of characters
+    // appended!  It also violates the jetty standard of leaving buffers in flush mode.
+    
     /**
      * Convenience method to wrap a ByteBuffer with a {@link Utf8CharBuffer}
      * 
@@ -59,6 +63,13 @@ public class Utf8CharBuffer extends Utf8Appendable
     {
         buffer.append((char)c);
     }
+    
+    @Override 
+    public void reset()
+    {
+        clear();
+        super.reset();
+    }
 
     public void clear()
     {
@@ -96,6 +107,13 @@ public class Utf8CharBuffer extends Utf8Appendable
     {
         return buffer.remaining();
     }
+    
+
+    @Override
+    public String getPartialString()
+    {
+        return buffer.toString();
+    }
 
     @Override
     public String toString()
@@ -109,4 +127,5 @@ public class Utf8CharBuffer extends Utf8Appendable
         str.append("]");
         return str.toString();
     }
+
 }

jetty-websocket/websocket-common/src/main/java/org/eclipse/jetty/websocket/common/util/Utf8PartialBuilder.java

@@ -30,22 +30,13 @@ import org.eclipse.jetty.util.Utf8StringBuilder;
  * A call to {@link #toPartialString(ByteBuffer)} will return the section of the String from the start to the last
  * completed UTF8 sequence. Leaving incomplete sequences for a subsequent call to complete.
  */
+@Deprecated
 public class Utf8PartialBuilder
 {
-    private final StringBuilder str;
-    private final Utf8Appendable utf8;
+    private final Utf8StringBuilder utf8 = new Utf8StringBuilder();
 
     public Utf8PartialBuilder()
     {
-        this.str = new StringBuilder();
-        this.utf8 = new Utf8Appendable(str)
-        {
-            @Override
-            public int length()
-            {
-                return str.length();
-            }
-        };
     }
 
     public String toPartialString(ByteBuffer buf)
@@ -56,8 +47,6 @@ public class Utf8PartialBuilder
             return "";
         }
         utf8.append(buf);
-        String ret = str.toString();
-        str.setLength(0);
-        return ret;
+        return utf8.takePartialString();
     }
 }