Provide a getter for custom properties, to match the add and contains methods already there

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1622252 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/java/org/apache/poi/POIXMLProperties.java

@@ -285,6 +285,7 @@ public class POIXMLProperties {
 		public org.openxmlformats.schemas.officeDocument.x2006.extendedProperties.CTProperties getUnderlyingProperties() {
 			return props.getProperties();
 		}
+		
 	}
 
 	/**
@@ -393,5 +394,24 @@ public class POIXMLProperties {
             }
             return false;
         }
+        
+        /**
+         * Retrieve the custom property with this name, or null if none exists.
+         *
+         * You will need to test the various isSetX methods to work out
+         *  what the type of the property is, before fetching the 
+         *  appropriate value for it.
+         *
+         * @param name the name of the property to fetch
+         */
+        @SuppressWarnings("deprecation")
+        public CTProperty getProperty(String name) {
+            for(CTProperty p : props.getProperties().getPropertyArray()){
+                if(p.getName().equals(name)) {
+                    return p;
+                }
+            }
+            return null;
+        }
     }
 }