Update of /var/cvs/src/org/mmbase/util/functions
In directory james.mmbase.org:/tmp/cvs-serv30526
Modified Files:
CombinedFunction.java
Log Message:
javadoc
See also: http://cvs.mmbase.org/viewcvs/src/org/mmbase/util/functions
Index: CombinedFunction.java
===================================================================
RCS file: /var/cvs/src/org/mmbase/util/functions/CombinedFunction.java,v
retrieving revision 1.7
retrieving revision 1.8
diff -u -b -r1.7 -r1.8
--- CombinedFunction.java 25 Nov 2007 18:25:49 -0000 1.7
+++ CombinedFunction.java 11 Jul 2008 14:48:56 -0000 1.8
@@ -14,10 +14,16 @@
import org.mmbase.util.logging.Logging;
/**
- * A combined function combines other function object. Depending on the
provided filled paramters it calls the right function.
+ * A combined function combines other function objects. Depending on the
provided filled paramters
+ * it calls the right function. So, it uses the function for which the
provided parameters object
+ * matched best.
+ *
+ * The best match is determined by a kind of scoring mechanism. Every missing
required parameter
+ * makes the function score very bad. Otherwise the rule is that the more
parameters of the function
+ * are provided, the better it is.
*
* @author Michiel Meeuwissen
- * @version $Id: CombinedFunction.java,v 1.7 2007/11/25 18:25:49 nklasens Exp $
+ * @version $Id: CombinedFunction.java,v 1.8 2008/07/11 14:48:56 michiel Exp $
* @since MMBase-1.9
*/
public class CombinedFunction<R> implements Function<R> {
@@ -46,7 +52,7 @@
} else if
(funcType.getTypeAsClass().isAssignableFrom(returnType.getTypeAsClass())) {
returnType = funcType;
} else {
- throw new IllegalStateException("" + func + " is not
compatible");
+ throw new IllegalStateException("" + func + " is not
compatible. The return type " + funcType + " does not match " + returnType + "
(defined by " + functions + ")");
}
}
functions.add(func);
@@ -87,6 +93,9 @@
return r;
}
+ /**
+ * Combines the parameter definitions of the wrapped function to one new
parameter definition
+ */
protected void determinDefinition() {
if (functions.size() == 0) throw new IllegalStateException("No
functions added");
for (Function<R> f : functions) {
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