001    /*
002     * Jpkg - Java library and tools for operating system package creation.
003     *
004     * Copyright (c) 2007-2008 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.ant.dpkg.dependencies;
032    
033    import java.util.ArrayList;
034    import java.util.List;
035    
036    import com.threerings.antidote.field.ListField;
037    import com.threerings.jpkg.debian.PackageInfo;
038    import com.threerings.jpkg.debian.dependency.DependencyAlternatives;
039    import com.threerings.jpkg.debian.dependency.PackageDependency;
040    
041    import static com.threerings.antidote.MutabilityHelper.requiresValidation;
042    
043    
044    /**
045     * The <dependencies> <alternatives> field. Holds <require> fields which indicate a list of
046     * package dependencies, one of which must be met.
047     * @see DependencyAlternatives
048     */
049    public class Alternatives extends ListField<Require>
050        implements PackageInfoDependency
051    {
052        // from Field
053        public String getFieldName ()
054        {
055            return "alternatives";
056        }
057    
058        @Override // from ListField
059        public String getChildFieldName ()
060        {
061            return "require";
062        }
063    
064        // from PackageInfoDependency
065        public void addToPackageInfo (PackageInfo info)
066        {
067            requiresValidation(_alternatives);
068            info.addDependencyAlternative(_alternatives);
069        }
070    
071        /**
072         * Ant adder field: require.
073         */
074        public void add (Require require)
075        {
076            appendRequiresValidation(require);
077        }
078    
079        @Override // from BaseComponent
080        protected void validateField ()
081        {
082            if (noChildFieldsDefined()) {
083                return;
084            }
085    
086            switch (validateFieldList()) {
087                case ALL_INVALID:
088                case SOME_INVALID:
089                    return;
090    
091                case ALL_VALID:
092                    break;
093            }
094    
095            final List<PackageDependency> depends = new ArrayList<PackageDependency>();
096            for (final Require require : getValidatedFieldList()) {
097                depends.add(require.getDependency());
098            }
099    
100            _alternatives = new DependencyAlternatives(depends);
101        }
102    
103        /** The DependencyAlternatives object representing the user supplied data. */
104        private DependencyAlternatives _alternatives;
105    }