java_gen: OFMatch add support for OF1.4 (and fix OF1.2)

pulled the custom Match code from OFMatchV3Ver13 out into generic
templates for OFMatchV3, that's included for OF1[234].
diff --git a/java_gen/templates/custom/OFMatchV3Ver12.java b/java_gen/templates/custom/OFMatchV3Ver12.java
index 81092c1..225b0dc 100644
--- a/java_gen/templates/custom/OFMatchV3Ver12.java
+++ b/java_gen/templates/custom/OFMatchV3Ver12.java
@@ -1,114 +1 @@
-
-    @Override
-    public <F extends OFValueType<F>> F get(MatchField<F> field)
-            throws UnsupportedOperationException {
-        if (!supports(field))
-            throw new UnsupportedOperationException("OFMatchV3Ver13 does not support matching on field " + field.getName());
-
-        OFOxm<F> oxm = this.oxmList.get(field);
-
-        if (oxm == null || !field.arePrerequisitesOK(this))
-            return null;
-
-        return oxm.getValue();
-    }
-
-    @Override
-    public <F extends OFValueType<F>> Masked<F> getMasked(MatchField<F> field)
-            throws UnsupportedOperationException {
-        if (!supportsMasked(field))
-            throw new UnsupportedOperationException("OFMatchV3Ver13 does not support masked matching on field " + field.getName());
-
-        OFOxm<F> oxm = this.oxmList.get(field);
-
-        if (oxm == null || !field.arePrerequisitesOK(this))
-            return null;
-
-        if (oxm.getMask() == null)
-            return null;
-
-        // TODO: Make OfOxm extend Masked and just return the OXM?
-        return Masked.of(oxm.getValue(), oxm.getMask());
-    }
-
-    private static boolean supportsField(MatchField<?> field) {
-        switch (field.id) {
-            case IN_PORT:
-            case IN_PHY_PORT:
-            case METADATA:
-            case ETH_DST:
-            case ETH_SRC:
-            case ETH_TYPE:
-            case VLAN_VID:
-            case VLAN_PCP:
-            case IP_DSCP:
-            case IP_ECN:
-            case IP_PROTO:
-            case IPV4_SRC:
-            case IPV4_DST:
-            case TCP_SRC:
-            case TCP_DST:
-            case UDP_SRC:
-            case UDP_DST:
-            case SCTP_SRC:
-            case SCTP_DST:
-            case ICMPV4_TYPE:
-            case ICMPV4_CODE:
-            case ARP_OP:
-            case ARP_SPA:
-            case ARP_TPA:
-            case ARP_SHA:
-            case ARP_THA:
-            case IPV6_SRC:
-            case IPV6_DST:
-            case IPV6_FLABEL:
-                return true;
-            default:
-                return false;
-        }
-    }
-
-    @Override
-    public boolean supports(MatchField<?> field) {
-        return supportsField(field);
-    }
-
-    @Override
-    public boolean supportsMasked(MatchField<?> field) {
-        return supportsField(field);
-    }
-
-    @Override
-    public boolean isExact(MatchField<?> field) {
-        if (!supports(field))
-            throw new UnsupportedOperationException("OFMatchV3Ver13 does not support matching on field " + field.getName());
-
-        OFOxm<?> oxm = this.oxmList.get(field);
-
-        return oxm != null && !oxm.isMasked();
-    }
-
-    @Override
-    public boolean isFullyWildcarded(MatchField<?> field) {
-        if (!supports(field))
-            throw new UnsupportedOperationException("OFMatchV3Ver13 does not support matching on field " + field.getName());
-
-        OFOxm<?> oxm = this.oxmList.get(field);
-
-        return oxm == null;
-    }
-
-    @Override
-    public boolean isPartiallyMasked(MatchField<?> field) {
-        if (!supports(field))
-            throw new UnsupportedOperationException("OFMatchV3Ver13 does not support matching on field " + field.getName());
-
-        OFOxm<?> oxm = this.oxmList.get(field);
-
-        return oxm != null && oxm.isMasked();
-    }
-
-    @Override
-    public Iterable<MatchField<?>> getMatchFields() {
-        throw new UnsupportedOperationException();
-    }
+//:: include("custom/OFMatchV3.java", msg=msg, has_parent=False)