//
// ========================================================================
// Copyright (c) 1995-2020 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under
// the terms of the Eclipse Public License 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0
//
// This Source Code may also be made available under the following
// Secondary Licenses when the conditions for such availability set
// forth in the Eclipse Public License, v. 2.0 are satisfied:
// the Apache License v2.0 which is available at
// https://www.apache.org/licenses/LICENSE-2.0
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//

package org.eclipse.jetty.util;

import java.net.InetAddress;
import java.util.AbstractSet;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.function.Predicate;

A set of InetAddress patterns.
This is a Set of String patterns that are used to match a Predicate over InetAddress for containment semantics. The patterns that may be set are defined in InetAddressPattern. 
This class is designed to work with IncludeExcludeSet
See Also:
IncludeExcludeSet/**
 * A set of InetAddress patterns.
 * <p>This is a {@link Set} of String patterns that are used to match
 * a {@link Predicate} over InetAddress for containment semantics.
 * The patterns that may be set are defined in {@link InetAddressPattern}.
 * </p>
 * <p>This class is designed to work with {@link IncludeExcludeSet}</p>
 *
 * @see IncludeExcludeSet
 */
public class InetAddressSet extends AbstractSet<String> implements Set<String>, Predicate<InetAddress>
{
    private Map<String, InetAddressPattern> _patterns = new HashMap<>();

    @Override
    public boolean add(String pattern)
    {
        return _patterns.put(pattern, InetAddressPattern.from(pattern)) == null;
    }

    @Override
    public boolean remove(Object pattern)
    {
        return _patterns.remove(pattern) != null;
    }

    @Override
    public Iterator<String> iterator()
    {
        return _patterns.keySet().iterator();
    }

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

    @Override
    public boolean test(InetAddress address)
    {
        if (address == null)
            return false;
        for (InetAddressPattern pattern : _patterns.values())
        {
            if (pattern.test(address))
                return true;
        }
        return false;
    }
}