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/**
 * Copyright (C) 2006-2015 phloc systems
 * http://www.phloc.com
 * office[at]phloc[dot]com
 *
 * Licensed 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.phloc.web.smtp;

import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;

import com.phloc.commons.email.IEmailAddress;

/**
 * This class handles a single email address. It is split into an address part
 * and an optional name. The personal name is optional and may be
 * null.
 * 
 * @author Philip Helger
 */
@Immutable
public final class InternetAddressUtils
{
  private InternetAddressUtils ()
  {}

  @Nonnull
  public static InternetAddress getAsInternetAddress (@Nonnull final IEmailAddress aAddress,
                                                      @Nullable final Charset aCharset) throws AddressException
  {
    return getAsInternetAddress (aAddress.getAddress (), aAddress.getPersonal (), aCharset);
  }

  @Nonnull
  public static InternetAddress getAsInternetAddress (@Nonnull final String sAddress,
                                                      @Nullable final String sPersonal,
                                                      @Nullable final Charset aCharset) throws AddressException
  {
    try
    {
      return getAsInternetAddress (sAddress, sPersonal, aCharset == null ? null : aCharset.name ());
    }
    catch (final UnsupportedEncodingException ex)
    {
      throw new IllegalStateException ("Charset " + aCharset + " is unknown!", ex);
    }
  }

  @Nonnull
  public static InternetAddress getAsInternetAddress (@Nonnull final IEmailAddress aAddress,
                                                      @Nullable final String sCharset) throws UnsupportedEncodingException,
                                                                                      AddressException
  {
    return getAsInternetAddress (aAddress.getAddress (), aAddress.getPersonal (), sCharset);
  }

  @Nonnull
  public static InternetAddress getAsInternetAddress (@Nonnull final String sAddress,
                                                      @Nullable final String sPersonal,
                                                      @Nullable final String sCharset) throws UnsupportedEncodingException,
                                                                                      AddressException
  {
    final InternetAddress ret = new InternetAddress (sAddress, sPersonal, sCharset);
    ret.validate ();
    return ret;
  }
}