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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.
 */

package com.bugvm.conscrypt;

import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.security.KeyManagementException;
import javax.net.ssl.SSLSocketFactory;
import com.bugvm.conscrypt.util.EmptyArray;

/**
 * Implementation of SSLSocketFactory.
 */
public class SSLSocketFactoryImpl extends SSLSocketFactory {

    private final SSLParametersImpl sslParameters;
    private final IOException instantiationException;

    /**
     * Constructor.
     */
    public SSLSocketFactoryImpl() {
        SSLParametersImpl sslParametersLocal = null;
        IOException instantiationExceptionLocal = null;
        try {
            sslParametersLocal = SSLParametersImpl.getDefault();
        } catch (KeyManagementException e) {
            instantiationExceptionLocal = new IOException("Delayed instantiation exception:");
            instantiationExceptionLocal.initCause(e);
        }
        this.sslParameters = sslParametersLocal;
        this.instantiationException = instantiationExceptionLocal;
    }

    /**
     * Constructor.
     */
    protected SSLSocketFactoryImpl(SSLParametersImpl sslParameters) {
        this.sslParameters = sslParameters;
        this.instantiationException = null;
    }

    /**
     * @see javax.net.ssl.SSLSocketFactory#getDefaultCipherSuites()
     */
    @Override
    public String[] getDefaultCipherSuites() {
        if (instantiationException != null) {
            return EmptyArray.STRING;
        }
        return sslParameters.getEnabledCipherSuites();
    }

    /**
     * @see javax.net.ssl.SSLSocketFactory#getSupportedCipherSuites()
     */
    @Override
    public String[] getSupportedCipherSuites() {
        if (instantiationException != null) {
            return EmptyArray.STRING;
        }
        return CipherSuite.getSupportedCipherSuiteNames();
    }

    /**
     * @see javax.net.ssl.SSLSocketFactory#createSocket(Socket,String,int,boolean)
     */
    @Override
    public Socket createSocket(Socket s, String host, int port,
            boolean autoClose) throws IOException {
        if (instantiationException != null) {
            throw instantiationException;
        }
        return new SSLSocketWrapper(s, host, port, autoClose, (SSLParametersImpl) sslParameters
                .clone());
    }

    // -------------- Methods inherided from SocketFactory --------------

    /**
     * @see javax.net.SocketFactory#createSocket()
     */
    @Override
    public Socket createSocket() throws IOException {
        if (instantiationException != null) {
            throw instantiationException;
        }
        return new SSLSocketImpl((SSLParametersImpl) sslParameters.clone());
    }

    /**
     * @see javax.net.SocketFactory#createSocket(String,int)
     */
    @Override
    public Socket createSocket(String host, int port)
            throws IOException, UnknownHostException {
        if (instantiationException != null) {
            throw instantiationException;
        }
        return new SSLSocketImpl(host, port,
                (SSLParametersImpl) sslParameters.clone());
    }

    /**
     * @see javax.net.SocketFactory#createSocket(String,int,InetAddress,int)
     */
    @Override
    public Socket createSocket(String host, int port,
            InetAddress localHost, int localPort) throws IOException,
            UnknownHostException {
        if (instantiationException != null) {
            throw instantiationException;
        }
        return new SSLSocketImpl(host, port, localHost, localPort,
                (SSLParametersImpl) sslParameters.clone());
    }

    /**
     * @see javax.net.SocketFactory#createSocket(InetAddress,int)
     */
    @Override
    public Socket createSocket(InetAddress host, int port)
            throws IOException {
        if (instantiationException != null) {
            throw instantiationException;
        }
        return new SSLSocketImpl(host, port,
                (SSLParametersImpl) sslParameters.clone());
    }

    /**
     * @see javax.net.SocketFactory#createSocket(InetAddress,int,InetAddress,int)
     */
    @Override
    public Socket createSocket(InetAddress address, int port,
            InetAddress localAddress, int localPort) throws IOException {
        if (instantiationException != null) {
            throw instantiationException;
        }
        return new SSLSocketImpl(address, port, localAddress, localPort,
                (SSLParametersImpl) sslParameters.clone());
    }

    // ------------------------------------------------------------------
}