1 files changed, 177 insertions, 0 deletions
diff --git a/src/Domain.java b/src/Domain.java
new file mode 100644
index 0000000..1d13e25
--- /dev/null
+++ b/src/Domain.java
@@ -0,0 +1,177 @@
+/**
+ * Intern representation of a domain, plus a set of helper static methods to
+ * parse strings like 127:2010,224.5.6.7:8910.
+ *
+ * Usually, you don't have to use this, and just rely on {@link bus.start}
+ * with a null parameter. However, if you want to parse a command line
+ * parameter, or output the result of Ivy libary guessing order, then you can
+ * use those methods.
+ *
+ * @author Yannick Jestin <a * href="mailto:yannick.jestin@enac.fr">yannick.jestin&enac.fr</a>
+ * @since 1.2.16
+ */
+package fr.dgac.ivy;
+
+import java.util.regex.*;
+import java.util.Collections;
+import java.util.Collection;
+import java.util.List;
+import java.util.ArrayList;
+import gnu.getopt.Getopt;
+
+public class Domain {
+
+  /**
+   * the port for the UDP rendez vous, if none is supplied.
+   */
+  public static final int DEFAULT_PORT = 2010;
+
+  /**
+   * the domain for the UDP rendez vous.
+   */
+  public static final String DEFAULT_DOMAIN = "127.255.255.255:" + DEFAULT_PORT;
+
+  // private fields
+  private String domainaddr;
+  private int port;
+  private static Pattern numbersPoint, exp;
+
+  public Domain(String ddomainaddr , int dport) { this.domainaddr = ddomainaddr;this.port = dport; }
+
+  @Override public String toString() { return domainaddr + ":" + port; }
+
+  // accessors
+  public String getDomainaddr() { return domainaddr; }
+  public int getPort() { return port; }
+
+
+  static {
+    try {
+      numbersPoint = Pattern.compile("([0-9]|\\.)+");
+      exp = Pattern.compile( "^(\\d+\\.\\d+\\.\\d+\\.\\d+).*");
+    } catch (PatternSyntaxException res) {
+      res.printStackTrace();
+      System.out.println("Regular Expression bug in Ivy source code ... bailing out");
+      throw new RuntimeException();
+    }
+  }
+  
+
+  static final String getDomain(final String domainbus) {
+    String db = null;
+    db = domainbus;
+    if ( db == null ) db = System.getProperty("IVYBUS");
+    if ( db == null ) db = DEFAULT_DOMAIN;
+    return db;
+  }
+
+  /*
+  private boolean isInDomain( InetAddress host ){
+    return true;
+   // TODO check if this function is useful. for now, it always returns true
+   // deprecated since we use Multicast. How to check when we are in UDP
+   // broadcast ?
+   //
+    byte rem_addr[] = host.getAddress();
+    for ( int i = 0 ; i < domainaddrList.size(); i++ ) {
+      byte addr[] = ((InetAddress)domainaddrList.elementAt(i)).getAddress();
+      int j ;
+      for (  j = 0 ; j < 4 ; j++  )
+        if ( (addr[j] != -1) && (addr[j] != rem_addr[j]) ) break;
+      if ( j == 4 ) {
+        traceDebug( "host " + host + " is in domain\n" );
+	return true;
+      }
+    }
+    traceDebug( "host " + host + " Not in domain\n" );
+    return false;
+  }
+  */
+
+  private static int extractPort(String net) { // returns 0 if no port is set
+    int sep_index = net.lastIndexOf( ":" );
+    int port= ( sep_index == -1 ) ? 0 :Integer.parseInt( net.substring( sep_index +1 ));
+    // System.out.println("net: ["+net+"]\nsep_index: "+sep_index+"\nport: "+port);
+    //System.out.println("next port: "+port);
+    return port;
+  }
+
+  private static String expandDomain(String net) throws IvyException {
+    // System.out.println("debug: net=[" + net+ "]");
+    int sep_index = net.lastIndexOf( ":" );
+    if ( sep_index != -1 ) { net = net.substring(0,sep_index); }
+    try {
+      Matcher m = numbersPoint.matcher(net);
+      if (!m.matches()) {
+	// traceDebug("should only have numbers and point ? I won't add anything... " + net);
+	return "127.255.255.255";
+	// return net;
+      }
+      net += ".255.255.255";
+      Matcher mm= exp.matcher(net);
+      if (!mm.matches()) {
+	System.out.println("Bad broascat addr " + net);
+	throw new IvyException("bad broadcast addr");
+      }
+      net=mm.group(1);
+    } catch ( PatternSyntaxException e ){
+      e.printStackTrace();
+      throw new RuntimeException();
+    }
+    //System.out.println("next domain: "+net);
+    return net;
+  }
+
+  /**
+   * returns the domain bus.
+   *
+   * @since 1.2.8
+   * @param progname The name of your program, for error message
+   * @param args the String[] of arguments passed to your main()
+   * @return returns the domain bus, ascending priority : ivy default bus, IVY_BUS
+   * property, -b domain on the command line
+   */
+
+  public static final String getDomainArgs(final String progname, final String[] args) {
+    Getopt opt = new Getopt(progname , args , "b:");
+    int c;
+    if ( ((c = opt.getopt()) != -1) && c == 'b' ) return opt.getOptarg();
+    return getDomain(null);
+  }
+
+  final static List<Domain> parseDomains(final String domainbus) {
+    // assert(domainbus!=null);
+    List<Domain> d = new ArrayList<Domain>();
+    for (String s: domainbus.split(",")) {
+      try {
+        d.add(new Domain(expandDomain(s) , extractPort(s)));
+      } catch (IvyException ie) {
+        // do nothing
+        ie.printStackTrace();
+      }
+    }
+    // fixes the port values ...
+    Collections.reverse(d);
+    int lastport = DEFAULT_PORT;
+    for (Domain dom : d) {
+      if (dom.port == 0) dom.port = lastport;
+      lastport = dom.port;
+    }
+    Collections.reverse(d);
+    return d;
+  }
+
+
+  /**
+   * prints a human readable representation of the list of domains.
+   *
+   * @since 1.2.9
+   */
+  static public String domains(String toparse) {
+    StringBuffer s = new StringBuffer();
+    if (toparse == null) toparse = getDomain(toparse);
+    for (Domain dd : parseDomains(toparse)) s.append(dd.getDomainaddr() + ":" + dd.getPort() + " ");
+    return s.toString();
+  }
+
+}