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/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * .
 *
 */
package org.apache.http.impl.conn;

import org.apache.http.HttpHost;
import org.apache.http.annotation.Contract;
import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.conn.SchemePortResolver;
import org.apache.http.conn.UnsupportedSchemeException;
import org.apache.http.util.Args;

/**
 * Default {@link SchemePortResolver}.
 *
 * @since 4.3
 */
@Contract(threading = ThreadingBehavior.IMMUTABLE)
public class DefaultSchemePortResolver implements SchemePortResolver {

    public static final DefaultSchemePortResolver INSTANCE = new DefaultSchemePortResolver();

    @Override
    public int resolve(final HttpHost host) throws UnsupportedSchemeException {
        Args.notNull(host, "HTTP host");
        final int port = host.getPort();
        if (port > 0) {
            return port;
        }
        final String name = host.getSchemeName();
        if (name.equalsIgnoreCase("http")) {
            return 80;
        } else if (name.equalsIgnoreCase("https")) {
            return 443;
        } else {
            throw new UnsupportedSchemeException(name + " protocol is not supported");
        }
    }

}