Added cubby-holes for new projects.
diff --git a/of-save/lib/src/main/java/org/projectfloodlight/openflow/protocol/match/Prerequisite.java b/of-save/lib/src/main/java/org/projectfloodlight/openflow/protocol/match/Prerequisite.java
new file mode 100644
index 0000000..03d5e79
--- /dev/null
+++ b/of-save/lib/src/main/java/org/projectfloodlight/openflow/protocol/match/Prerequisite.java
@@ -0,0 +1,45 @@
+package org.projectfloodlight.openflow.protocol.match;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import org.projectfloodlight.openflow.types.OFValueType;
+
+public class Prerequisite<T extends OFValueType<T>> {
+ private final MatchField<T> field;
+ private final Set<OFValueType<T>> values;
+ private boolean any;
+
+ @SafeVarargs
+ public Prerequisite(MatchField<T> field, OFValueType<T>... values) {
+ this.values = new HashSet<OFValueType<T>>();
+ this.field = field;
+ if (values == null || values.length == 0) {
+ this.any = true;
+ } else {
+ this.any = false;
+ for (OFValueType<T> value : values) {
+ this.values.add(value);
+ }
+ }
+ }
+
+ /**
+ * Returns true if this prerequisite is satisfied by the given match object.
+ *
+ * @param match Match object
+ * @return true iff prerequisite is satisfied.
+ */
+ public boolean isSatisfied(Match match) {
+ OFValueType<T> res = match.get(this.field);
+ if (res == null)
+ return false;
+ if (this.any)
+ return true;
+ if (this.values.contains(res)) {
+ return true;
+ }
+ return false;
+ }
+
+}