Author: norman
Date: Mon Jul 18 06:06:13 2011
New Revision: 1147753
URL: http://svn.apache.org/viewvc?rev=1147753&view=rev
Log:
Make MessageRanger Iterable
Modified:
james/mailbox/trunk/api/src/main/java/org/apache/james/mailbox/MessageRange.java
Modified:
james/mailbox/trunk/api/src/main/java/org/apache/james/mailbox/MessageRange.java
URL:
http://svn.apache.org/viewvc/james/mailbox/trunk/api/src/main/java/org/apache/james/mailbox/MessageRange.java?rev=1147753&r1=1147752&r2=1147753&view=diff
==============================================================================
---
james/mailbox/trunk/api/src/main/java/org/apache/james/mailbox/MessageRange.java
(original)
+++
james/mailbox/trunk/api/src/main/java/org/apache/james/mailbox/MessageRange.java
Mon Jul 18 06:06:13 2011
@@ -22,13 +22,15 @@ package org.apache.james.mailbox;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
+import java.util.Iterator;
import java.util.List;
+import java.util.NoSuchElementException;
/**
* Used to define a range of messages by uid.<br>
* The type of the set should be defined by using an appropriate constructor.
*/
-public class MessageRange {
+public class MessageRange implements Iterable<Long>{
public enum Type {
/** All messages */
@@ -268,4 +270,58 @@ public class MessageRange {
public static List<MessageRange> toRanges(List<Long> uidsCol) {
return toRanges((Collection<Long>)uidsCol);
}
+
+
+ /**
+ * Return a read-only {@link Iterator} which contains all uid which fail
in the specified range.
+ *
+ * @return rangeIt
+ */
+ @Override
+ public Iterator<Long> iterator() {
+ long from = getUidFrom();
+ if (from == NOT_A_UID) {
+ from = 1;
+ }
+ long to = getUidTo();
+ if (to == NOT_A_UID) {
+ to = Long.MAX_VALUE;
+ }
+ return new RangeIterator(from, to);
+ }
+
+ /**
+ * {@link Iterator} of a range of msn/uid
+ *
+ */
+ private final class RangeIterator implements Iterator<Long> {
+
+ private long to;
+ private long current;
+
+ public RangeIterator(long from, long to) {
+ this.to = to;
+ this.current = from;
+ }
+
+ @Override
+ public boolean hasNext() {
+ return current <= to;
+ }
+
+ @Override
+ public Long next() {
+ if (hasNext()) {
+ return current++;
+ } else {
+ throw new NoSuchElementException("Max uid of " + to + " was
reached before");
+ }
+ }
+
+ @Override
+ public void remove() {
+ throw new java.lang.UnsupportedOperationException("Read-Only");
+ }
+
+ }
}
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