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// Burton Computer Corporation
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package org.javimmutable.collections.common;

import org.javimmutable.collections.Func1;
import org.javimmutable.collections.JImmutableMap;
import org.javimmutable.collections.JImmutableSet;

import javax.annotation.Nonnull;

public class GenericSetBuilder
    implements JImmutableSet.Builder
{
    private final JImmutableMap.Builder mapBuilder;
    private final Func1, JImmutableSet> setFactory;

    public GenericSetBuilder(JImmutableMap.Builder mapBuilder,
                             Func1, JImmutableSet> setFactory)
    {
        this.mapBuilder = mapBuilder;
        this.setFactory = setFactory;
    }

    @Nonnull
    @Override
    public JImmutableSet build()
    {
        return setFactory.apply(mapBuilder.build());
    }

    @Nonnull
    @Override
    public JImmutableSet.Builder clear()
    {
        mapBuilder.clear();
        return this;
    }

    @Override
    public int size()
    {
        return mapBuilder.size();
    }

    @Nonnull
    @Override
    public JImmutableSet.Builder add(T value)
    {
        mapBuilder.add(value, Boolean.TRUE);
        return this;
    }
}