rwaldhoff 2003/03/04 17:12:47
Modified: functor/src/test/org/apache/commons/functor/example
FlexiMapExample.java
Log:
add StringConcatMap example
Revision Changes Path
1.4 +40 -4
jakarta-commons-sandbox/functor/src/test/org/apache/commons/functor/example/FlexiMapExample.java
Index: FlexiMapExample.java
===================================================================
RCS file:
/home/cvs/jakarta-commons-sandbox/functor/src/test/org/apache/commons/functor/example/FlexiMapExample.java,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -r1.3 -r1.4
--- FlexiMapExample.java 5 Mar 2003 00:16:38 -0000 1.3
+++ FlexiMapExample.java 5 Mar 2003 01:12:47 -0000 1.4
@@ -204,6 +204,15 @@
}
+ public void testStringConcatMap() {
+ Map map = makeStringConcatMap();
+ map.put("key", "value 1");
+ assertEquals("value 1",map.get("key"));
+ map.put("key", "value 2");
+ assertEquals("value 1, value 2",map.get("key"));
+ map.put("key", "value 3");
+ assertEquals("value 1, value 2, value 3",map.get("key"));
+ }
static class FlexiMap implements Map {
@@ -224,9 +233,9 @@
}
public Object put(Object key, Object value) {
- Object oldvalue = get(key);
+ Object oldvalue = proxiedMap.get(key);
proxiedMap.put(key, onPut.evaluate(oldvalue, value));
- return oldvalue;
+ return onGet.evaluate(key,oldvalue);
}
public Object get(Object key) {
@@ -336,6 +345,33 @@
}
},
null
+ );
+ }
+
+ private Map makeStringConcatMap() {
+ return new FlexiMap(
+ new BinaryFunction() {
+ public Object evaluate(Object oldval, Object newval) {
+ StringBuffer buf = null;
+ if(null == oldval) {
+ buf = new StringBuffer();
+ } else {
+ buf = (StringBuffer)oldval;
+ buf.append(", ");
+ }
+ buf.append(newval);
+ return buf;
+ }
+ },
+ new BinaryFunction() {
+ public Object evaluate(Object key, Object val) {
+ if(null == val) {
+ return null;
+ } else {
+ return ((StringBuffer)val).toString();
+ }
+ }
+ }
);
}
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