content: /*
   * Copyright (C) 2014 The Android Open Source Project
   *
   * 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 android.service.carrier;
  
  import android.annotation.NonNull;
  import android.os.Parcel;
  import android.os.Parcelable;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * A parcelable list of PDUs representing contents of a possibly multi-part SMS.
   */
  public final class MessagePdu implements Parcelable {
      private static final int NULL_LENGTH = -1;
  
      private final List<byte[]> mPduList;
  
      /**
       * Constructs a MessagePdu with the list of message PDUs.
       *
       * @param pduList the list of message PDUs
       */
      public MessagePdu(@NonNull List<byte[]> pduList) {
          if (pduList == null || pduList.contains(null)) {
              throw new IllegalArgumentException("pduList must not be null or contain nulls");
          }
          mPduList = pduList;
      }
  
      /**
       * Returns the contents of a possibly multi-part SMS.
       *
       * @return the list of PDUs
       */
      public @NonNull List<byte[]> getPdus() {
          return mPduList;
      }
  
      @Override
      public int describeContents() {
          return 0;
      }
  
      @Override
      public void writeToParcel(Parcel dest, int flags) {
          if (mPduList == null) {
              dest.writeInt(NULL_LENGTH);
          } else {
              dest.writeInt(mPduList.size());
              for (byte[] messagePdu : mPduList) {
                  dest.writeByteArray(messagePdu);
              }
          }
      }
  
      /**
       * Constructs a {@link MessagePdu} from a {@link Parcel}.
       */
      public static final @android.annotation.NonNull Parcelable.Creator<MessagePdu> CREATOR
              = new Parcelable.Creator<MessagePdu>() {
                  @Override
                  public MessagePdu createFromParcel(Parcel source) {
                      int size = source.readInt();
                      List<byte[]> pduList;
                      if (size == NULL_LENGTH) {
                          pduList = null;
                      } else {
                          pduList = new ArrayList<>(size);
                          for (int i = 0; i < size; i++) {
                              pduList.add(source.createByteArray());
                          }
                      }
                      return new MessagePdu(pduList);
                  }
  
                  @Override
                  public MessagePdu[] newArray(int size) {
                      return new MessagePdu[size];
                  }
              };
  }
  