| /* |
| * Copyright (c) 1997, 2012, 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 com.sun.xml.internal.org.jvnet.mimepull; |
| |
| import java.nio.ByteBuffer; |
| |
| /** |
| * Keeps the Part's partial content data in a file. |
| * |
| * @author Kohsuke Kawaguchi |
| * @author Jitendra Kotamraju |
| */ |
| final class FileData implements Data { |
| private final DataFile file; |
| private final long pointer; // read position |
| private final int length; |
| |
| FileData(DataFile file, ByteBuffer buf) { |
| this(file, file.writeTo(buf.array(), 0, buf.limit()), buf.limit()); |
| } |
| |
| FileData(DataFile file, long pointer, int length) { |
| this.file = file; |
| this.pointer = pointer; |
| this.length = length; |
| } |
| |
| @Override |
| public byte[] read() { |
| byte[] buf = new byte[length]; |
| file.read(pointer, buf, 0, length); |
| return buf; |
| } |
| |
| /* |
| * This shouldn't be called |
| */ |
| @Override |
| public long writeTo(DataFile file) { |
| throw new IllegalStateException(); |
| } |
| |
| @Override |
| public int size() { |
| return length; |
| } |
| |
| /* |
| * Always create FileData |
| */ |
| @Override |
| public Data createNext(DataHead dataHead, ByteBuffer buf) { |
| return new FileData(file, buf); |
| } |
| } |