import org.projectfloodlight.openflow.protocol.oxm.OFOxmIpv4Src; //导入依赖的package包/类
private OFMatchV3 buildOFMatchV3() {
	OFFactory of13Factory = OFFactories.getFactory(OFVersion.OF_13);
	OFOxms oxms = of13Factory.oxms();
	
	OFOxmEthType ofOxmEthType = oxms.buildEthType().setValue(EthType.IPv4).build();
	OFOxmIpv4Src ofOxmIpv4Src = oxms.buildIpv4Src().setValue(IPv4Address.of(multicastGroup.sourceIP)).build();
	OFOxmIpProto ofOxmIpProto = oxms.buildIpProto().setValue(IpProtocol.UDP).build();
	OFOxmIpv4Dst ofOxmIpv4Dst = oxms.buildIpv4Dst().setValue(IPv4Address.of(multicastGroup.groupIP)).build();
	OFOxmList oxmList = OFOxmList.of(ofOxmEthType, ofOxmIpv4Src, ofOxmIpv4Dst, ofOxmIpProto);
	OFMatchV3 of13Match = of13Factory.buildMatchV3().setOxmList(oxmList).build();
	return of13Match;		
}
 

import org.projectfloodlight.openflow.protocol.oxm.OFOxmIpv4Src; //导入依赖的package包/类
@Test
public void testGetCanonicalNoMask() {
    IPv4AddressWithMask fullIp = IPv4AddressWithMask.of("1.2.3.4/32");
    assertEquals(IPv4Address.NO_MASK, fullIp.getMask());
    OFOxmIpv4SrcMasked ipv4SrcMasked = oxms.ipv4SrcMasked(fullIp.getValue(), fullIp.getMask());
    assertTrue(ipv4SrcMasked.isMasked());
    assertEquals(IPv4Address.NO_MASK, ipv4SrcMasked.getMask());

    // canonicalize should convert the masked oxm to the non-masked one
    OFOxm<IPv4Address> canonical = ipv4SrcMasked.getCanonical();
    assertThat(canonical, CoreMatchers.instanceOf(OFOxmIpv4Src.class));
    assertFalse(canonical.isMasked());
}