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/*
* @(#)ProtocolConsumerUIDIterator.java 1.4 06/28/07
*/
package com.sun.messaging.jmq.jmsserver.multibroker.raptor;
import java.util.*;
import java.io.*;
import java.nio.*;
import com.sun.messaging.jmq.jmsserver.core.ConsumerUID;
import com.sun.messaging.jmq.jmsserver.core.BrokerAddress;
/**
* A helper class to read list of ConsumerUIDs in cluster protocols
*/
public class ProtocolConsumerUIDIterator implements Iterator
{
private int count = 0;
private int count_read = 0;
private DataInputStream dis = null;
private BrokerAddress from = null;
public ProtocolConsumerUIDIterator(byte[] payload, int count, BrokerAddress from) {
ByteArrayInputStream bis = new ByteArrayInputStream(payload);
dis = new DataInputStream(bis);
this.count = count;
this.count_read = 0;
this.from = from;
}
public ProtocolConsumerUIDIterator(DataInputStream dis, int count) {
this.dis = dis;
this.count = count;
this.count_read = 0;
}
public boolean hasNext() {
if (count_read < 0) throw new IllegalStateException("ConsumerUIDIterator");
return count_read < count;
}
/**
* Caller must catch RuntimeException and getCause
*/
public Object next() throws RuntimeException {
try {
ConsumerUID cid = ClusterConsumerInfo.readConsumerUID(dis);
if (from != null) cid.setBrokerAddress(from);
count_read++;
return cid;
} catch (IOException e) {
count_read = -1;
throw new RuntimeException(e);
}
}
public void remove() {
throw new UnsupportedOperationException("Not supported");
}
}