1 package javax.sip; 2 3 import java.lang.reflect.Constructor; 4 import java.util.HashMap; 5 import java.util.Map; 6 import java.util.Properties; 7 import javax.sip.address.AddressFactory; 8 import javax.sip.header.HeaderFactory; 9 import javax.sip.message.MessageFactory; 10 11 public class SipFactory { 12 private static final String IP_ADDRESS_PROP = "javax.sip.IP_ADDRESS"; 13 private static final String STACK_NAME_PROP = "javax.sip.STACK_NAME"; 14 15 private static SipFactory sSipFactory = null; 16 getInstance()17 public static synchronized SipFactory getInstance() { 18 if (sSipFactory == null) sSipFactory = new SipFactory(); 19 return sSipFactory; 20 } 21 22 // name-to-SipStack map; name could be IP address for backward compatibility 23 private Map<String, SipStack> mNameSipStackMap = 24 new HashMap<String, SipStack>(); 25 SipFactory()26 private SipFactory() { 27 } 28 resetFactory()29 public synchronized void resetFactory() { 30 mNameSipStackMap.clear(); 31 } 32 createSipStack(Properties properties)33 public synchronized SipStack createSipStack(Properties properties) 34 throws PeerUnavailableException { 35 // for backward compatibility, if IP_ADDRESS_PROP exists, use it and 36 // ignore STACK_NAME_PROP. 37 String name = properties.getProperty(IP_ADDRESS_PROP); 38 if (name == null) { 39 name = properties.getProperty(STACK_NAME_PROP); 40 if (name == null ) { 41 throw new PeerUnavailableException( 42 STACK_NAME_PROP + " property not found"); 43 } 44 } 45 46 SipStack sipStack = mNameSipStackMap.get(name); 47 if (sipStack == null) { 48 String implClassName = "gov.nist." 49 + SipStack.class.getCanonicalName() + "Impl"; 50 try { 51 sipStack = Class.forName(implClassName) 52 .asSubclass(SipStack.class) 53 .getConstructor(new Class[] {Properties.class}) 54 .newInstance(new Object[] {properties}); 55 } catch (Exception e) { 56 throw new PeerUnavailableException( 57 "Failed to initiate " + implClassName, e); 58 } 59 mNameSipStackMap.put(name, sipStack); 60 } 61 return sipStack; 62 } 63 createAddressFactory()64 public AddressFactory createAddressFactory() 65 throws PeerUnavailableException { 66 try { 67 return new gov.nist.javax.sip.address.AddressFactoryImpl(); 68 } catch (Exception e) { 69 if (e instanceof PeerUnavailableException) { 70 throw (PeerUnavailableException) e; 71 } else { 72 throw new PeerUnavailableException( 73 "Failed to create AddressFactory", e); 74 } 75 } 76 } 77 createHeaderFactory()78 public HeaderFactory createHeaderFactory() throws PeerUnavailableException { 79 try { 80 return new gov.nist.javax.sip.header.HeaderFactoryImpl(); 81 } catch (Exception e) { 82 if (e instanceof PeerUnavailableException) { 83 throw (PeerUnavailableException) e; 84 } else { 85 throw new PeerUnavailableException( 86 "Failed to create HeaderFactory", e); 87 } 88 } 89 } 90 createMessageFactory()91 public MessageFactory createMessageFactory() 92 throws PeerUnavailableException { 93 try { 94 return new gov.nist.javax.sip.message.MessageFactoryImpl(); 95 } catch (Exception e) { 96 if (e instanceof PeerUnavailableException) { 97 throw (PeerUnavailableException) e; 98 } else { 99 throw new PeerUnavailableException( 100 "Failed to create MessageFactory", e); 101 } 102 } 103 } 104 } 105