Examples of java.util.Enumeration

java.util.Enumeration
An object that implements the Enumeration interface generates a series of elements, one at a time. Successive calls to the nextElement method return successive elements of the series.
For example, to print all elements of a Vector<E> v:
```
 for (Enumeration<E> e = v.elements(); e.hasMoreElements();) System.out.println(e.nextElement());
```
Methods are provided to enumerate through the elements of a vector, the keys of a hashtable, and the values in a hashtable. Enumerations are also used to specify the input streams to a SequenceInputStream.
NOTE: The functionality of this interface is duplicated by the Iterator interface. In addition, Iterator adds an optional remove operation, and has shorter method names. New implementations should consider using Iterator in preference to Enumeration. @see java.util.Iterator @see java.io.SequenceInputStream @see java.util.Enumeration#nextElement() @see java.util.Hashtable @see java.util.Hashtable#elements() @see java.util.Hashtable#keys() @see java.util.Vector @see java.util.Vector#elements() @author Lee Boynton @version 1.24, 11/17/05 @since JDK1.0

    protected void close() {
      socket.close();
    }


    protected void shutdown() {
      Enumeration enumSrvInfo = serversInfo.elements();
      while (enumSrvInfo.hasMoreElements()) {
        ServerInfo srvInfo = (ServerInfo) enumSrvInfo.nextElement();
        if (srvInfo.messageIncomingBuilder != null) {
          srvInfo.messageIncomingBuilder.shutdown();
        }
      }
      close();

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            if (!running) {
              break;
            }


            Enumeration enuAddr = serversInfo.keys();
            long currentTimeMillis = System.currentTimeMillis();
            
            while (enuAddr.hasMoreElements()) {
              SocketAddress addr = (SocketAddress) enuAddr.nextElement();
              ServerInfo servInfo = (ServerInfo) serversInfo.get(addr);
              
              synchronized (servInfo.lock) {
                
                if (!hasBeenForced

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public class GZIPFilter implements Filter {


  private List ignore_pages = new ArrayList();
  
  public void init(FilterConfig filterConfig) {
    Enumeration pnames = filterConfig.getInitParameterNames();
    while(pnames.hasMoreElements()){
      String param = (String)pnames.nextElement();
      if(param.startsWith("ignore")){
        ignore_pages.add(filterConfig.getInitParameter(param));
      }
    }
  }

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  public String getStatusInfo() {
    return AgentServer.getStatusInfo();
  }


  public String[] getServers() {
    Enumeration e = AgentServer.elementsServerDesc();
    String[] servers = new String[AgentServer.getServerNb()];
    StringBuffer strBuf = new StringBuffer();
    for (int i=0; e.hasMoreElements(); i++) {
      ServerDesc server = (ServerDesc) e.nextElement();
      strBuf.append("sid=").append(server.sid);
      strBuf.append(",name=").append(server.name);
      if (server.gateway == -1) {
        strBuf.append(",gateway=").append(server.gateway);
      } else {

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      // add cluster properties
      if (cluster != null 
          && cluster.properties != null 
          && cluster.properties.size() > 0) {
        Enumeration e = cluster.properties.elements();
        do {
          A3CMLProperty p = (A3CMLProperty) e.nextElement();
          Configuration.putProperty(p.name, p.value);


          if (logmon.isLoggable(BasicLevel.DEBUG))
            logmon.log(BasicLevel.DEBUG,
                       getName() + " : Adds cluster property: " +
                       p.name + " = " + p.value);
        } while (e.hasMoreElements());
      }
      if (cluster != null)
        server = cluster.getServer(cid);
    } else {
      server = a3config.getServer(sid);
    }


    // add server properties
    if (server != null && server.properties != null) {
      Enumeration e = server.properties.elements();
      do {
        A3CMLProperty p = (A3CMLProperty) e.nextElement();
        Configuration.putProperty(p.name, p.value);


        if (logmon.isLoggable(BasicLevel.DEBUG))
          logmon.log(BasicLevel.DEBUG,
                     getName() + " : Adds server property: " +
                     p.name + " = " + p.value);
      } while (e.hasMoreElements());
    }
  }

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      }
      status.value = Status.RESETING;
    }


    // Remove all consumers Mbean
    Enumeration e = getConsumers();
    if (e != null) {
      for (; e.hasMoreElements();) {
        MessageConsumer cons = (MessageConsumer) e.nextElement();
        try {
          MXWrapper.unregisterMBean("AgentServer", "server=" + getName() + ",cons=" + cons.getName());
        } catch (Exception exc) {
          logmon.log(BasicLevel.DEBUG,
                     getName() + ", jmx failed: " + "server=" + getName() + ",cons=" + cons.getName(), exc);

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     * loop through properties and print them with their property-name
     * as elementname
     */
    private void writeProperties(INode node, int level)
                          throws IOException {
        Enumeration e = null;


        if (dbmode && node instanceof Node) {
            // a newly constructed db.Node doesn't have a propMap,
            // but returns an enumeration of all it's db-mapped properties
            Hashtable props = ((Node) node).getPropMap();


            if (props == null) {
                return;
            }


            e = props.keys();
        } else {
            e = node.properties();
        }


        while (e.hasMoreElements()) {
            String key = (String) e.nextElement();
            if (dbmode && key.charAt(0) == '_') {
                continue;
            }
            IProperty prop = node.get(key);

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            if ((smap != null) && smap.isRelational()) {
                return;
            }
        }


        Enumeration e = node.getSubnodes();


        while (e.hasMoreElements()) {
            INode nextNode = (INode) e.nextElement();


            write(nextNode, "hop:child", null, level);
        }
    }

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      StringBuffer text = new StringBuffer();
      text.append("\n\nDatabaseSaver options:\n");
      try {
  DatabaseSaver asv = new DatabaseSaver();
        try {
          Enumeration enumi = asv.listOptions();
          while (enumi.hasMoreElements()) {
            Option option = (Option)enumi.nextElement();
            text.append(option.synopsis()+'\n');
            text.append(option.description()+'\n');
        }  
          asv.setOptions(options);
          asv.setDestination();

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    catch(Exception ex) {
  printException(ex);
        StringBuffer text = new StringBuffer();
        if(m_query.equals("Select * from Results0")){
            text.append("\n\nDatabaseLoader options:\n");
            Enumeration enumi = listOptions();
            while (enumi.hasMoreElements()) {
                Option option = (Option)enumi.nextElement();
                text.append(option.synopsis()+'\n');
                text.append(option.description()+'\n');
            }
            System.out.println(text);
        }

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