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package com.enonic.xp.content;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import com.google.common.collect.ImmutableList;

import com.enonic.xp.annotation.PublicApi;

@PublicApi
public class ContentVersions
    implements Iterable
{
    private final ImmutableList contentVersions;

    private final ContentId contentId;

    private ContentVersions( Builder builder )
    {
        contentVersions = ImmutableList.sortedCopyOf( ContentVersionDateComparator.INSTANCE, builder.contentVersions );
        contentId = builder.contentId;
    }

    public ContentId getContentId()
    {
        return contentId;
    }

    public static Builder create()
    {
        return new Builder();
    }

    @Override
    public Iterator iterator()
    {
        return this.contentVersions.iterator();
    }


    public static final class Builder
    {
        private final List contentVersions = new ArrayList<>();

        private ContentId contentId;

        private Builder()
        {
        }

        public Builder add( final ContentVersion contentVersion )
        {
            this.contentVersions.add( contentVersion );
            return this;
        }

        public Builder contentId( ContentId contentId )
        {
            this.contentId = contentId;
            return this;
        }

        public ContentVersions build()
        {
            return new ContentVersions( this );
        }
    }
}