aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.org.jvnet.mimepull;
aoqi@0: 
aoqi@0: import java.nio.ByteBuffer;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * Keeps the Part's partial content data in a file.
aoqi@0:  *
aoqi@0:  * @author Kohsuke Kawaguchi
aoqi@0:  * @author Jitendra Kotamraju
aoqi@0:  */
aoqi@0: final class FileData implements Data {
aoqi@0:     private final DataFile file;
aoqi@0:     private final long pointer;         // read position
aoqi@0:     private final int length;
aoqi@0: 
aoqi@0:     FileData(DataFile file, ByteBuffer buf) {
aoqi@0:         this(file, file.writeTo(buf.array(), 0, buf.limit()), buf.limit());
aoqi@0:     }
aoqi@0: 
aoqi@0:     FileData(DataFile file, long pointer, int length) {
aoqi@0:         this.file = file;
aoqi@0:         this.pointer = pointer;
aoqi@0:         this.length = length;
aoqi@0:     }
aoqi@0: 
aoqi@0:     @Override
aoqi@0:     public byte[] read() {
aoqi@0:         byte[] buf = new byte[length];
aoqi@0:         file.read(pointer, buf, 0, length);
aoqi@0:         return buf;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /*
aoqi@0:      * This shouldn't be called
aoqi@0:      */
aoqi@0:     @Override
aoqi@0:     public long writeTo(DataFile file) {
aoqi@0:         throw new IllegalStateException();
aoqi@0:     }
aoqi@0: 
aoqi@0:     @Override
aoqi@0:     public int size() {
aoqi@0:         return length;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /*
aoqi@0:      * Always create FileData
aoqi@0:      */
aoqi@0:     @Override
aoqi@0:     public Data createNext(DataHead dataHead, ByteBuffer buf) {
aoqi@0:         return new FileData(file, buf);
aoqi@0:     }
aoqi@0: }