1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.tools.jlink.internal;
  27 
  28 import jdk.tools.jlink.plugin.ResourcePoolEntry;
  29 
  30 import java.io.InputStream;
  31 import java.util.Objects;
  32 
  33 /**
  34  * A symbolic link ResourcePoolEntry.  It will be created in the image
  35  * as a symbolic link to the target when the target platform supports
  36  * symbolic links; otherwise, it will create a file containing the
  37  * path to the target file.
  38  */
  39 public class SymLinkResourcePoolEntry extends AbstractResourcePoolEntry {
  40     private final ResourcePoolEntry target;
  41 
  42     /**
  43      * Create a new SymLinkResourcePoolEntry.
  44      *
  45      * @param module The module name.
  46      * @param path   The path for the resource content.
  47      * @param type   The data type.
  48      * @param target Target entry in the image
  49      */
  50     public SymLinkResourcePoolEntry(String module,
  51                                     String path,
  52                                     ResourcePoolEntry.Type type,
  53                                     ResourcePoolEntry target) {
  54         super(module, path, type);
  55         this.target = Objects.requireNonNull(target);
  56     }
  57 
  58     @Override
  59     public long contentLength() {
  60         return target.contentLength();
  61     }
  62 
  63     @Override
  64     public InputStream content() {
  65         return target.content();
  66     }
  67 
  68     @Override
  69     public ResourcePoolEntry linkedTarget() {
  70         return target;
  71     }
  72 }