--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.incubator.adba/share/classes/jdk/incubator/sql2/SqlBlob.java	Mon Apr 02 14:19:45 2018 -0400
@@ -0,0 +1,255 @@
+/*
+ * Copyright (c)  2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.incubator.sql2;
+
+import java.nio.channels.AsynchronousByteChannel;
+import java.util.concurrent.CompletionStage;
+
+/**
+ * A reference to a BINARY LARGE OBJECT in the attached database.
+ *
+ */
+public interface SqlBlob extends AutoCloseable {
+
+  /**
+   * Return an {@link Operation} that will release the temporary resources
+   * associated with this {@link SqlBlob}.
+   *
+   * @return an {@link Operation} that will release the temporary resources
+   * associated with this {@link SqlBlob}.
+   */
+  public Operation<Void> closeOperation();
+
+  @Override
+  public default void close() {
+    this.closeOperation().submit();
+  }
+
+  /**
+   * Return a {@link Operation} that fetches the position of this {@link SqlBlob}.
+   * The position is 1-based. Position 0 is immediately before the first byte in
+   * the {@link SqlBlob}. Position 1 is the first byte in the {@link SqlBlob}, etc.
+   * Position {@link length()} is the last byte in the {@link SqlBlob}.
+   *
+   * Position is between 0 and length + 1.
+   *
+   * @return a {@link Operation} that returns the position of this {@link SqlBlob}
+   * @throws IllegalStateException if the {@link Connection} that created this
+   * {@link SqlBlob} is closed.
+   */
+  public Operation<Long> getPositionOperation();
+
+  /**
+   * Get the position of this {@link SqlBlob}. The position is 1-based. Position 0
+   * is immediately before the first byte in the {@link SqlBlob}. Position 1 is the
+   * first byte in the {@link SqlBlob}, etc. Position {@link length()} is the last
+   * byte in the {@link SqlBlob}.
+   *
+   * Position is between 0 and length + 1.
+   *
+   * ISSUE: Should position be 1-based as SQL seems to do or 0-based as Java
+   * does?
+   *
+   * @return a future which value is the 1-based position of this {@link SqlBlob}
+   * @throws IllegalStateException if the {@link Connection} that created this
+   * {@link SqlBlob} is closed.
+   */
+  public default CompletionStage<Long> getPosition() {
+    return getPositionOperation().submit().getCompletionStage();
+  }
+
+  /**
+   * Return a {@link Operation} that fetches the length of this {@link SqlBlob}.
+   *
+   * @return a {@link Operation} that returns the length of this {@link SqlBlob}
+   * @throws IllegalStateException if the {@link Connection} that created this
+   * {@link SqlBlob} is closed.
+   */
+  public Operation<Long> lengthOperation();
+
+  /**
+   * Get the length of this {@link SqlBlob}.
+   *
+   * @return a future which value is the number of bytes in this {@link SqlBlob}
+   * @throws IllegalStateException if the {@link Connection} that created this
+   * {@link SqlBlob} is closed.
+   */
+  public default CompletionStage<Long> length() {
+    return lengthOperation().submit().getCompletionStage();
+  }
+
+  /**
+   * Return a {@link Operation} that sets the position of this {@link SqlBlob}. If
+   * offset exceeds the length of this {@link SqlBlob} set position to the length +
+   * 1 of this {@link SqlBlob}, ie one past the last byte.
+   *
+   * @param offset a non-negative number
+   * @return a {@link Operation} that sets the position of this {@link SqlBlob}
+   * @throws IllegalArgumentException if {@code offset} is less than 0
+   * @throws IllegalStateException if the {@link Connection} that created this
+   * {@link SqlBlob} is closed.
+   */
+  public Operation<Long> setPositionOperation(long offset);
+
+  /**
+   * Set the position of this {@link SqlBlob}. If offset exceeds the length of this
+   * {@link SqlBlob} set position to the length + 1 of this {@link SqlBlob}, ie one
+   * past the last byte.
+   *
+   * @param offset the 1-based position to set
+   * @return this {@link SqlBlob}
+   * @throws IllegalArgumentException if offset is less than 0
+   * @throws IllegalStateException if the {@link Connection} that created this
+   * {@link SqlBlob} is closed.
+   */
+  public default SqlBlob setPosition(long offset) {
+    setPositionOperation(offset).submit();
+    return this;
+  }
+
+  /**
+   * Return a {@link Operation} to set the position to the beginning of the next
+   * occurrence of the target after the position. If there is no such occurrence
+   * set the position to 0.
+   *
+   * @param target a {@link SqlBlob} created by the same {@link Connection}
+   * containing the byte sequence to search for
+   * @return a {@link Operation} that locates {@code target} in this
+   * {@link SqlBlob}
+   * @throws IllegalArgumentException if {@code target} was created by some
+   * other {@link Connection}
+   * @throws IllegalStateException if the {@link Connection} that created this
+   * {@link SqlBlob} is closed.
+   */
+  public Operation<Long> locateOperation(SqlBlob target);
+
+  /**
+   * Set the position to the beginning of the next occurrence of the target
+   * after the position. If there is no such occurrence set the position to 0.
+   *
+   * @param target the byte sequence to search for
+   * @return this {@link SqlBlob}
+   * @throws IllegalArgumentException if {@code target} was created by some
+   * other {@link Connection}
+   * @throws IllegalStateException if the {@link Connection} that created this
+   * {@link SqlBlob} is closed
+   */
+  public default SqlBlob locate(SqlBlob target) {
+    locateOperation(target).submit();
+    return this;
+  }
+
+  /**
+   * Return an {@link Operation} to set the position to the beginning of the
+   * next occurrence of the target after the position. If there is no such
+   * occurrence set the position to 0.
+   *
+   * @param target the byte sequence to search for. Not {@code null}. Captured.
+   * @return a {@link Operation} that locates {@code target} in this
+   * {@link SqlBlob}
+   * @throws IllegalStateException if the {@link Connection} that created this
+   * {@link SqlBlob} is closed.
+   */
+  public Operation<Long> locateOperation(byte[] target);
+
+  /**
+   * Set the position to the beginning of the next occurrence of the target
+   * after the position. If there is no such occurrence set the position to 0.
+   *
+   * @param target the byte sequence to search for
+   * @return this {@link SqlBlob}
+   * @throws IllegalStateException if the {@link Connection} that created this
+   * {@link SqlBlob} is closed.
+   */
+  public default SqlBlob locate(byte[] target) {
+    locateOperation(target).submit();
+    return this;
+  }
+
+  /**
+   * Return a {@link Operation} that truncates this {@link SqlBlob} so that the
+   * current position is the end of the {@link SqlBlob}. If the position is N, then
+   * after {@link trim()} the length is N - 1. The position is still N. This
+   * will fail if position is 0.
+   *
+   * @return a {@link Operation} that trims the length of this {@link SqlBlob}
+   * @throws IllegalStateException if the {@link Connection} that created this
+   * {@link SqlBlob} is closed or position is 0.
+   */
+  public Operation<Long> trimOperation();
+
+  /**
+   * Truncate this {@link SqlBlob} so that the current position is the end of the
+   * {@link SqlBlob}. If the position is N, then after {@link trim()} the length is
+   * N - 1. The position is still N. This will fail if position is 0.
+   *
+   * @return this SqlBlob
+   * @throws IllegalStateException if the {@link Connection} that created this
+   * {@link SqlBlob} is closed or position is 0.
+   */
+  public default SqlBlob trim() {
+    trimOperation().submit();
+    return this;
+  }
+
+  /**
+   * Return a {@link java.nio.channels.Channel} that can be used to read bytes from the
+   * {@link SqlBlob} beginning at the position. Reading bytes from the returned
+   * {@link java.nio.channels.Channel} advances the position.
+   *
+   * Each call to a read method that fetches bytes from the server creates and
+   * submits a virtual {@link Operation} to fetch those bytes. This virtual
+   * {@link Operation} is executed in sequence with other {@link Operation}s and
+   * may be skipped if an error occurs.
+   *
+   * @return a read-only byte {@link java.nio.channels.Channel} beginning at the position.
+   * @throws IllegalStateException if the {@link Connection} that created this
+ SqlBlob is closed.
+   */
+  public AsynchronousByteChannel getReadChannel();
+
+  /**
+   * Return a {@link java.nio.channels.Channel} that can be used to write bytes
+   * to this {@link SqlBlob} beginning at the position. Bytes written overwrite
+   * bytes already in the {@link SqlBlob}. Writing bytes to the returned
+   * {@link java.nio.channels.Channel} advances the position.
+   *
+   * Each call to a write method that flushes bytes to the server creates and
+   * submits a virtual {@link Operation} to flush those bytes. This virtual
+   * {@link Operation} is executed in sequence with other {@link Operation}s and
+   * may be skipped if an error occurs.
+   *
+   * ISSUE: Can the app read bytes from a write
+   * {@link java.nio.channels.Channel}? If so then maybe remove
+   * {@link getReadChannel} and add a read-only flag to this method, renamed
+   * {@code getChannel}.
+   *
+   * @return a writable byte {@link java.nio.channels.Channel} beginning at the
+   * position.
+   * @throws IllegalStateException if the {@link Connection} that created this
+   * {@link SqlBlob} is closed.
+   */
+  public AsynchronousByteChannel getWriteChannel();
+}