001 /* 002 * Jpkg - Java library and tools for operating system package creation. 003 * 004 * Copyright (c) 2007 Three Rings Design, Inc. 005 * All rights reserved. 006 * 007 * Redistribution and use in source and binary forms, with or without 008 * modification, are permitted provided that the following conditions 009 * are met: 010 * 1. Redistributions of source code must retain the above copyright 011 * notice, this list of conditions and the following disclaimer. 012 * 2. Redistributions in binary form must reproduce the above copyright 013 * notice, this list of conditions and the following disclaimer in the 014 * documentation and/or other materials provided with the distribution. 015 * 3. Neither the name of the copyright owner nor the names of contributors 016 * may be used to endorse or promote products derived from this software 017 * without specific prior written permission. 018 * 019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 021 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 022 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 023 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 024 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 025 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 026 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 027 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 028 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 029 * POSSIBILITY OF SUCH DAMAGE. 030 */ 031 package com.threerings.jpkg.debian.dependency; 032 033 import java.util.ArrayList; 034 import java.util.List; 035 036 import com.threerings.jpkg.debian.ControlFileData; 037 038 /** 039 * A generic class which holds {@link ControlFileDependency} objects. These can be used to describe 040 * various Debian package dependency relationships, such as Depends, Conflicts, and Replaces. 041 * @see <a href="http://www.debian.org/doc/debian-policy/ch-relationships.html#s-binarydeps">Debian Policy Manual</a> 042 */ 043 public abstract class DependencyContainer 044 implements ControlFileData 045 { 046 /** 047 * Returns the number of dependencies defined. 048 */ 049 public int size () 050 { 051 return _dependencies.size(); 052 } 053 054 /** 055 * Concrete classes may us this to add a generic dependency object to this list of dependencies. 056 */ 057 protected void add (ControlFileDependency dependency) 058 { 059 _dependencies.add(dependency); 060 } 061 062 // from ControlFileData 063 public abstract String getField (); 064 065 // from ControlFileData 066 public String getFieldValue () 067 { 068 final StringBuilder builder = new StringBuilder(); 069 for (final ControlFileDependency dependency : _dependencies) { 070 if (builder.length() > 0) { 071 builder.append(", "); 072 } 073 builder.append(dependency.asString()); 074 } 075 return builder.toString(); 076 } 077 078 /** The list of dependencies. */ 079 private final List<ControlFileDependency> _dependencies = new ArrayList<ControlFileDependency>(); 080 }