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package com.jparams.store.index;

import java.util.List;
import java.util.Objects;
import java.util.Optional;

public class SynchronizedIndex implements Index
{
    private final Index index;
    private final Object mutex;

    public SynchronizedIndex(final Index index, final Object mutex)
    {
        this.index = index;
        this.mutex = mutex;
    }

    @Override
    public T getFirst(final Object key)
    {
        final T result;

        synchronized (mutex)
        {
            result = index.getFirst(key);
        }

        return result;
    }

    @Override
    public Optional findFirst(final Object key)
    {
        final Optional result;

        synchronized (mutex)
        {
            result = index.findFirst(key);
        }

        return result;
    }

    @Override
    public List get(final Object key)
    {
        final List results;

        synchronized (mutex)
        {
            results = index.get(key);
        }

        return results;
    }

    @Override
    public String getName()
    {
        return index.getName();
    }

    public Index getIndex()
    {
        return index;
    }

    @Override
    public boolean equals(final Object other)
    {
        if (this == other)
        {
            return true;
        }

        if (other == null || getClass() != other.getClass())
        {
            return false;
        }

        final SynchronizedIndex that = (SynchronizedIndex) other;
        return Objects.equals(index, that.index)
            && Objects.equals(mutex, that.mutex);
    }

    @Override
    public int hashCode()
    {
        return Objects.hash(index, mutex);
    }

    @Override
    public String toString()
    {
        return String.valueOf(index);
    }
}