com.exoplatform.iversion.Version.java Source code

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Here is the source code for com.exoplatform.iversion.Version.java

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/*
 * Copyright (C) 2003-2014 eXo Platform SAS.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package com.exoplatform.iversion;

import static com.google.common.collect.Maps.newLinkedHashMap;
import static java.util.Collections.unmodifiableMap;

import java.util.Map;
import java.util.Set;

import com.google.common.base.Function;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Maps;

/**
 * Created by The eXo Platform SAS
 * Author : eXoPlatform
 *          exo@exoplatform.com
 * Mar 30, 2014  
 */
public class Version<K, V, M> {

    private class ToVersionProperties implements Function<V, VersionProperty<V>> {

        @Override
        public VersionProperty<V> apply(V input) {
            return new VersionProperty<V>(revision, input);
        }

    }

    /** */
    public final long revision;

    /** */
    public final String branch;

    /** */
    public final Set<Long> parentRevisons;

    /** */
    public final Map<K, V> properties;

    /** */
    public final M metadata;

    public Version(Builder<K, V, M> builder) {
        this.revision = builder.revision;
        this.branch = builder.branch;
        this.parentRevisons = builder.parentRevisions;
        this.properties = unmodifiableMap(newLinkedHashMap(builder.properties));
        this.metadata = builder.metadata;
    }

    public Map<K, VersionProperty<V>> getVersionProperties() {
        return Maps.transformValues(properties, toVersionProperties());
    }

    private Function<? super V, VersionProperty<V>> toVersionProperties() {
        return new ToVersionProperties();
    }

    @Override
    public String toString() {
        return "Version[revision = " + revision + "]";
    }

    public static class Builder<K, V, M> {
        /** */
        private static Set<Long> EMPTY_PARENTS = ImmutableSet.of();

        /** */
        public final long revision;

        /** */
        public String branch;

        /** */
        public Set<Long> parentRevisions = EMPTY_PARENTS;

        /** */
        public Map<K, V> properties = ImmutableMap.of();

        public M metadata;

        public Builder(long revision) {
            this.revision = revision;
        }

        /**
         * Sets branch value
         * @param branch
         * @return
         */
        public Builder<K, V, M> branch(String branch) {
            this.branch = branch;
            return this;
        }

        public Builder<K, V, M> parents(Set<Long> parentRevisions) {
            this.parentRevisions = parentRevisions;
            return this;
        }

        public Builder<K, V, M> properties(Map<K, V> properties) {
            this.properties = properties;
            return this;
        }

        public Builder<K, V, M> metadata(M metadata) {
            this.metadata = metadata;
            return this;
        }
    }
}