diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/BundleIdGenerator.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/BundleIdGenerator.java
new file mode 100644
index 0000000..2cb3583
--- /dev/null
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/BundleIdGenerator.java
@@ -0,0 +1,7 @@
+package org.projectfloodlight.openflow.protocol;
+
+import org.projectfloodlight.openflow.types.BundleId;
+
+public interface BundleIdGenerator {
+    BundleId nextBundleId();
+}
diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/BundleIdGenerators.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/BundleIdGenerators.java
new file mode 100644
index 0000000..997e0cd
--- /dev/null
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/protocol/BundleIdGenerators.java
@@ -0,0 +1,28 @@
+package org.projectfloodlight.openflow.protocol;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+import org.projectfloodlight.openflow.types.BundleId;
+
+public class BundleIdGenerators {
+    private static final BundleIdGenerator GLOBAL_BUNDLE_ID_GENERATOR = create();
+
+    public static BundleIdGenerator create() {
+        return new StandardBundleIdGenerator();
+    }
+
+    public static BundleIdGenerator global() {
+        return GLOBAL_BUNDLE_ID_GENERATOR;
+    }
+}
+
+class StandardBundleIdGenerator implements BundleIdGenerator {
+
+    private final AtomicInteger idGen = new AtomicInteger();
+
+    @Override
+    public BundleId nextBundleId() {
+        return BundleId.of(idGen.incrementAndGet());
+    }
+
+}
\ No newline at end of file
diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/BundleId.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/BundleId.java
new file mode 100644
index 0000000..cccf67e
--- /dev/null
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/BundleId.java
@@ -0,0 +1,92 @@
+package org.projectfloodlight.openflow.types;
+
+import javax.annotation.concurrent.Immutable;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+
+import com.google.common.hash.PrimitiveSink;
+import com.google.common.primitives.UnsignedInts;
+
+@Immutable
+public class BundleId implements OFValueType<BundleId> {
+    static final int LENGTH = 4;
+
+    private final static int NONE_VAL = 0;
+    public final static BundleId NONE = new BundleId(NONE_VAL);
+
+    private final static int NO_MASK_VAL = 0xFFFFFFFF;
+    public final static BundleId NO_MASK = new BundleId(NO_MASK_VAL);
+    public final static BundleId FULL_MASK = NONE;
+
+    private final int rawValue;
+
+    private BundleId(final int rawValue) {
+        this.rawValue = rawValue;
+    }
+
+    public static BundleId of(final int raw) {
+        if(raw == NONE_VAL)
+            return NONE;
+        else if(raw == NO_MASK_VAL)
+            return NO_MASK;
+        return new BundleId(raw);
+    }
+
+    public int getInt() {
+        return rawValue;
+    }
+
+    @Override
+    public int getLength() {
+        return LENGTH;
+    }
+
+    @Override
+    public String toString() {
+        return UnsignedInts.toString(rawValue);
+    }
+
+    @Override
+    public BundleId applyMask(BundleId mask) {
+        return BundleId.of(rawValue & mask.rawValue);    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + rawValue;
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        BundleId other = (BundleId) obj;
+        if (rawValue != other.rawValue)
+            return false;
+        return true;
+    }
+
+    public void write4Bytes(ChannelBuffer c) {
+        c.writeInt(rawValue);
+    }
+
+    public static BundleId read4Bytes(ChannelBuffer c) {
+        return BundleId.of(c.readInt());
+    }
+
+    @Override
+    public int compareTo(BundleId o) {
+        return UnsignedInts.compare(rawValue, rawValue);
+    }
+
+    @Override
+    public void putTo(PrimitiveSink sink) {
+        sink.putInt(rawValue);
+    }
+}