#16 fixed

Author: Yegor Bugayenko

src/main/java/com/jcabi/email/Envelope.java

@@ -94,10 +94,6 @@ public Message unwrap() {
     @EqualsAndHashCode(of = "encs")
     @Loggable(Loggable.DEBUG)
     final class MIME implements Envelope {
-        /**
-         * Original envelope.
-         */
-        private final transient Envelope origin;
         /**
          * List of stamps.
          */
@@ -111,43 +107,32 @@ final class MIME implements Envelope {
          * @since 1.3
          */
         public MIME() {
-            this(Envelope.EMPTY, new Array<Stamp>(), new Array<Enclosure>());
+            this(new Array<Stamp>(), new Array<Enclosure>());
         }
         /**
          * Ctor.
          * @param env Original envelope
          * @since 1.5
          */
         public MIME(final Envelope env) {
-            this(env, new Array<Stamp>(), new Array<Enclosure>());
-        }
-        /**
-         * Ctor.
-         * @param stmps Stamps
-         * @param list List of enclosures
-         */
-        public MIME(final Iterable<Stamp> stmps,
-            final Iterable<Enclosure> list) {
             this(
-                Envelope.EMPTY, new Array<Stamp>(stmps),
-                new Array<Enclosure>(list)
+                Envelope.MIME.class.cast(env).stamps,
+                Envelope.MIME.class.cast(env).encs
             );
         }
         /**
          * Ctor.
-         * @param env Original envelope
          * @param stmps Stamps
          * @param list List of enclosures
          */
-        public MIME(final Envelope env, final Iterable<Stamp> stmps,
+        public MIME(final Iterable<Stamp> stmps,
             final Iterable<Enclosure> list) {
-            this.origin = env;
             this.stamps = new Array<Stamp>(stmps);
             this.encs = new Array<Enclosure>(list);
         }
         @Override
         public Message unwrap() throws IOException {
-            final Message msg = this.origin.unwrap();
+            final Message msg = Envelope.EMPTY.unwrap();
             final Multipart multi = new MimeMultipart("alternative");
             try {
                 for (final Enclosure enc : this.encs) {
@@ -170,7 +155,6 @@ public Message unwrap() throws IOException {
          */
         public Envelope.MIME with(final Stamp stamp) {
             return new Envelope.MIME(
-                this.origin,
                 this.stamps.with(stamp),
                 this.encs
             );
@@ -183,7 +167,6 @@ public Envelope.MIME with(final Stamp stamp) {
          */
         public Envelope.MIME with(final Enclosure enc) {
             return new Envelope.MIME(
-                this.origin,
                 this.stamps,
                 this.encs.with(enc)
             );

src/test/java/com/jcabi/email/EnvelopeTest.java

@@ -49,6 +49,7 @@
  * @author Yegor Bugayenko (yegor@teamed.io)
  * @version $Id$
  * @since 1.4
+ * @checkstyle ClassDataAbstractionCouplingCheck (500 lines)
  */
 public final class EnvelopeTest {