text: /*
   * TeleStax, Open Source Cloud Communications
   * Copyright 2011-2013, Telestax Inc and individual contributors
   * by the @authors tag.
   *
   * This is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as
   * published by the Free Software Foundation; either version 2.1 of
   * the License, or (at your option) any later version.
   *
   * This software is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this software; if not, write to the Free
   * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
   * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
   */
  
  package org.restcomm.protocols.ss7.isup.impl.message.parameter;
  
  import java.io.ByteArrayOutputStream;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.restcomm.protocols.ss7.isup.ParameterException;
  import org.restcomm.protocols.ss7.isup.message.parameter.InformationType;
  import org.restcomm.protocols.ss7.isup.message.parameter.InvokingRedirectReason;
  import org.restcomm.protocols.ss7.isup.message.parameter.RedirectReason;
  
  /**
   * @author baranowb
   *
   */
  public class InvokingRedirectReasonImpl extends AbstractInformationImpl implements InvokingRedirectReason {
  
      private List<RedirectReason> reasons = new ArrayList<RedirectReason>();
  
  
      public InvokingRedirectReasonImpl() {
          super(InformationType.InvokingRedirectReason);
      }
      @Override
      public void setReason(RedirectReason... reasons) {
          this.reasons.clear();
          if(reasons == null){
              return;
          }
          for(RedirectReason pr: reasons){
              if(pr!=null){
                  this.reasons.add(pr);
              }
          }
      }
  
      @Override
      public RedirectReason[] getReason() {
          return this.reasons.toArray(new RedirectReason[this.reasons.size()]);
      }
      @Override
      byte[] encode() throws ParameterException {
          ByteArrayOutputStream baos = new ByteArrayOutputStream();
          for (int index = 0; index < this.reasons.size(); index++) {
              RedirectReasonImpl ai = (RedirectReasonImpl) this.reasons.get(index);
              ai.trim();
  
              byte b = (byte) (ai.encode()[0] & 0x7F);
              if (index + 1 == this.reasons.size()) {
                  b |= 0x80;
              }
              baos.write(b);
  
          }
          return baos.toByteArray();
      }
  
      @Override
      void decode(byte[] data) throws ParameterException {
          for(int index = 0;index<data.length;index++){
              byte b = data[index];
              RedirectReasonImpl pr = new RedirectReasonImpl();
              pr.setRedirectReason((byte) (b & 0x7F));
              if( (b & 0x80) == 0 && index +1 == data.length){
                  throw new ParameterException("Extension bit incicates more bytes, but we ran out of them!");
              }
              this.reasons.add(pr);
          }
      }
  
  }
  