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Utility methods to get details of property changes (map comparison).

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git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@34824 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
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Neil McErlean
2012-03-27 16:39:23 +00:00
parent c89e99be37
commit 0f1e32a14c
2 changed files with 208 additions and 1 deletions
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110
source/java/org/alfresco/util/PropertyMap.java
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@@ -22,9 +22,9 @@ import java.io.Serializable;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import org.alfresco.service.namespace.QName;
import org.alfresco.util.Pair;
/**
* Property map helper class.
@@ -101,4 +101,112 @@ public class PropertyMap extends HashMap<QName, Serializable>
// Done
return new Pair<Map<QName, Serializable>, Map<QName, Serializable>>(beforeDelta, afterDelta);
}
/**
* Utility method to get properties which were added as part of a change.
*
* @param before the properties before (may be <code>null</code>).
* @param after the properties after (may be <code>null</code>).
* @return a map of values that were added along with their new values.
*
* @since Odin
*/
public static Map<QName, Serializable> getAddedProperties(Map<QName, Serializable> before, Map<QName, Serializable> after)
{
Map<QName, Serializable> result = new HashMap<QName, Serializable>();
if (before != null && after != null)
{
result.putAll(after);
result.keySet().removeAll(before.keySet());
}
return result;
}
/**
* Utility method to get properties which were removed as part of a change.
*
* @param before the properties before (may be <code>null</code>).
* @param after the properties after (may be <code>null</code>).
* @return a map of values that were removed along with their old values.
*
* @since Odin
*/
public static Map<QName, Serializable> getRemovedProperties(Map<QName, Serializable> before, Map<QName, Serializable> after)
{
Map<QName, Serializable> result = new HashMap<QName, Serializable>();
if (before != null && after != null)
{
result.putAll(before);
result.keySet().removeAll(after.keySet());
}
return result;
}
/**
* Utility method to get properties which were changed (but not added or removed) as part of a change.
*
* @param before the properties before (may be <code>null</code>).
* @param after the properties after (may be <code>null</code>).
* @return a map of values that were changed along with their new values.
*
* @since Odin
*/
public static Map<QName, Serializable> getChangedProperties(Map<QName, Serializable> before, Map<QName, Serializable> after)
{
Map<QName, Serializable> result = new HashMap<QName, Serializable>();
if (before != null && after != null)
{
Map<QName, Serializable> intersection = new HashMap<QName, Serializable>();
intersection.putAll(after);
intersection.keySet().retainAll(before.keySet());
for (Entry<QName, Serializable> entry : intersection.entrySet())
{
if ( ! EqualsHelper.nullSafeEquals(before.get(entry.getKey()), after.get(entry.getKey())))
{
result.put(entry.getKey(), entry.getValue());
}
}
}
return result;
}
/**
* Utility method to get properties which were unchanged as part of a change.
*
* @param before the properties before (may be <code>null</code>).
* @param after the properties after (may be <code>null</code>).
* @return a map of values that were unchanged along with their values.
*
* @since Odin
*/
public static Map<QName, Serializable> getUnchangedProperties(Map<QName, Serializable> before, Map<QName, Serializable> after)
{
Map<QName, Serializable> result = new HashMap<QName, Serializable>();
if (before != null && after != null)
{
Map<QName, Serializable> intersection = new HashMap<QName, Serializable>();
intersection.putAll(before);
intersection.keySet().retainAll(after.keySet());
for (Entry<QName, Serializable> entry : intersection.entrySet())
{
if ( EqualsHelper.nullSafeEquals(before.get(entry.getKey()), after.get(entry.getKey())))
{
result.put(entry.getKey(), entry.getValue());
}
}
}
return result;
}
}