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diff --git a/libjava/classpath/gnu/javax/net/ssl/provider/Constructed.java b/libjava/classpath/gnu/javax/net/ssl/provider/Constructed.java
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+/* Constructed.java -- Constructed type.
+   Copyright (C) 2006  Free Software Foundation, Inc.
+
+This file is a part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or (at
+your option) any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
+USA
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version.  */
+
+
+package gnu.javax.net.ssl.provider;
+
+/**
+ * The base interface to SSL constructed types.
+ *
+ * <p><b>Contract for ByteBuffer-based constructed types:</b>
+ *
+ * <p>Most implementations of this interface supported by this library
+ * take a "view" of an underlying ByteBuffer. The general contract of
+ * such classes is that they <em>will not</em> modify the position or
+ * limit of the buffer when doing read operations. That is, the position
+ * of the underlying buffer <em>should</em> remain at 0 throughout the
+ * lifetime of the object, and the limit should be either set to the
+ * capacity of the buffer, or to the size of the object (in most cases,
+ * the length of the protocol object is determined by the contents of
+ * the object, so the limit isn't useful in such cases. Of course, if the
+ * limit is set to something other than the object's length, it must be
+ * larger than the object length).
+ *
+ * <p>Setter methods (usually in a class that implements the {@link Builder}
+ * interface) may modify the limit, but the general contract remains that
+ * the position remain at zero, and that the limit be at least as large as
+ * the object length.
+ *
+ * <p>Thus, very often the code will use <em>absolute</em> getters and setters
+ * for primitive types, or it will use the {@link java.nio.ByteBuffer#duplicate()}
+ * method, and sometimes the {@link java.nio.ByteBuffer#slice()} method, and
+ * will change the position or limit of the duplicate buffer.
+ */
+public interface Constructed
+{
+  /**
+   * Returns the total length, in bytes, of this structure.
+   *
+   * @return The length of this structure.
+   */
+  int length();
+
+  /**
+   * Returns a printable representation of this structure, with the
+   * given prefix prepended to each line.
+   *
+   * @param prefix The prefix to prepend to each line of the
+   * output. This value may be <code>null</code>.
+   * @return A printable representation of this structure.
+   */
+  String toString(String prefix);
+}