diff options
Diffstat (limited to 'v3po/v3po2vpp/src/main/java/io/fd/honeycomb/translate/v3po/interfaces/ip/subnet/validation/SubnetValidator.java')
-rw-r--r-- | v3po/v3po2vpp/src/main/java/io/fd/honeycomb/translate/v3po/interfaces/ip/subnet/validation/SubnetValidator.java | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/translate/v3po/interfaces/ip/subnet/validation/SubnetValidator.java b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/translate/v3po/interfaces/ip/subnet/validation/SubnetValidator.java new file mode 100644 index 000000000..361113858 --- /dev/null +++ b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/translate/v3po/interfaces/ip/subnet/validation/SubnetValidator.java @@ -0,0 +1,80 @@ +/* + * Copyright (c) 2016 Cisco and/or its affiliates. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package io.fd.honeycomb.translate.v3po.interfaces.ip.subnet.validation; + +import static com.google.common.base.Preconditions.checkNotNull; + +import com.google.common.base.Function; +import com.google.common.collect.Multimap; +import com.google.common.collect.Multimaps; +import io.fd.honeycomb.translate.v3po.interfaces.ip.Ipv4WriteUtils; +import java.util.List; +import javax.annotation.Nonnull; +import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.ipv4.Address; +import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.ipv4.address.Subnet; +import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.ipv4.address.subnet.Netmask; +import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.ipv4.address.subnet.PrefixLength; + +/** + * Validator for detecting if there is an attempt to assign multiple addresses from same subnet + */ +public class SubnetValidator { + + /** + * Checks whether data provided for writing are not in collision with already existing data + */ + public void checkNotAddingToSameSubnet(@Nonnull final List<Address> addresses) + throws SubnetValidationException { + + final Multimap<Short, Address> prefixLengthRegister = Multimaps.index(addresses, toPrefixLength()); + final int keySetSize = prefixLengthRegister.keySet().size(); + + if (keySetSize == 0 || keySetSize == addresses.size()) { + //this means that every key is unique(has only one value) or no addresses were prefix-length based ,so there is no conflict + return; + } + + //finds conflicting prefix + final Short conflictingPrefix = prefixLengthRegister.keySet() + .stream() + .filter(a -> prefixLengthRegister.get(a).size() > 1) + .findFirst() + .get(); + + //and reports it with affected addresses + throw SubnetValidationException + .forConflictingData(conflictingPrefix, prefixLengthRegister.get(conflictingPrefix)); + } + + private static Function<Address, Short> toPrefixLength() { + return (final Address address) -> { + final Subnet subnet = address.getSubnet(); + + if (subnet instanceof PrefixLength) { + return ((PrefixLength) subnet).getPrefixLength(); + } + + if (address.getSubnet() instanceof Netmask) { + return (short) Ipv4WriteUtils.getSubnetMaskLength( + checkNotNull(((Netmask) subnet).getNetmask(), "No netmask defined for %s", subnet) + .getValue()); + } + + throw new IllegalArgumentException("Unsupported subnet : " + subnet); + }; + } +} |