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added test for concurrent modifications 

git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/collections/trunk@130698 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Morgan James Delagrange 2002-05-08 18:11:36 +00:00
parent a62220afa5
commit 33f0ab0d46
1 changed files with 27 additions and 5 deletions
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32
src/java/org/apache/commons/collections/LRUMap.java
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@ -1,7 +1,7 @@
/*
* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/java/org/apache/commons/collections/LRUMap.java,v 1.13 2002/04/16 21:15:13 morgand Exp $
* $Revision: 1.13 $
* $Date: 2002/04/16 21:15:13 $
* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/java/org/apache/commons/collections/LRUMap.java,v 1.14 2002/05/08 18:11:36 morgand Exp $
* $Revision: 1.14 $
* $Date: 2002/05/08 18:11:36 $
*
* ====================================================================
*
@ -118,6 +118,24 @@ public class LRUMap extends SequencedHashMap implements Externalizable {
maximumSize = i;
}
/**
* <p>Get the value for a key from the Map. The key
* will be promoted to the Most Recently Used position.
* Note that get(Object) operations will modify
* the underlying Collection. Calling get(Object)
* inside of an iteration over keys, values, etc. is
* currently unsupported.</p>
*
* @param key Key to retrieve
* @return Returns the value. Returns null if the key has a
* null value <i>or</i> if the key has no value.
*/
public Object get(Object key) {
Object value = remove(key);
super.put(key,value);
return value;
}
/**
* <p>Removes the key and its Object from the Map.</p>
*
@ -157,7 +175,9 @@ public class LRUMap extends SequencedHashMap implements Externalizable {
*/
protected void removeLRU() {
Object key = getFirstKey();
Object value = get(key);
// be sure to call super.get(key), or you're likely to
// get infinite promotion recursion
Object value = super.get(key);
remove(key);
@ -195,7 +215,9 @@ public class LRUMap extends SequencedHashMap implements Externalizable {
for( Iterator iterator = keySet().iterator(); iterator.hasNext(); ) {
Object key = iterator.next();
out.writeObject( key );
Object value = get( key );
// be sure to call super.get(key), or you're likely to
// get infinite promotion recursion
Object value = super.get( key );
out.writeObject( value );
}
}