Moving to root below branch label

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@2005 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/content/RandomAccessContent.java

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+/*
+ * Copyright (C) 2005 Alfresco, Inc.
+ *
+ * Licensed under the Mozilla Public License version 1.1 
+ * with a permitted attribution clause. You may obtain a
+ * copy of the License at
+ *
+ *   http://www.alfresco.org/legal/license.txt
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific
+ * language governing permissions and limitations under the
+ * License.
+ */
+package org.alfresco.repo.content;
+
+import java.nio.channels.FileChannel;
+
+import org.alfresco.service.cmr.repository.ContentIOException;
+
+/**
+ * Supplementary interface for content readers and writers that allow random-access to
+ * the underlying content.
+ * <p>
+ * The use of this interface by a client <b>may</b> preclude the use of any other
+ * access to the underlying content - this depends on the underlying implementation.
+ * 
+ * @author Derek Hulley
+ */
+public interface RandomAccessContent
+{
+    /**
+     * @return Returns true if the content can be written to 
+     */
+    public boolean canWrite();
+    
+    /**
+     * Get a channel to access the content.  The channel's behaviour is similar to that
+     * when a <tt>FileChannel</tt> is retrieved using {@link java.io.RandomAccessFile#getChannel()}.
+     * 
+     * @return Returns a channel to access the content
+     * @throws ContentIOException
+     *
+     * @see #canWrite()
+     * @see java.io.RandomAccessFile#getChannel()
+     */
+    public FileChannel getChannel() throws ContentIOException;
+}