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/*
* 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.util;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.base.Splitter;
import java.util.List;
import java.util.function.BiConsumer;
import javax.annotation.Nonnull;
import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.binary.Hex;
/**
* Trait providing logic for translation of ipv4-related data
*/
public interface MacTranslator {
Splitter COLON_SPLITTER = Splitter.on(':');
/**
* Parse string represented mac address (using ":" as separator) into a byte array
*/
@Nonnull
default byte[] parseMac(@Nonnull final String macAddress) {
final List<String> parts = COLON_SPLITTER.splitToList(macAddress);
checkArgument(parts.size() == 6, "Mac address is expected to have 6 parts but was: %s", macAddress);
return parseMacLikeString(parts);
}
default byte[] parseMacLikeString(final List<String> strings) {
return strings.stream().limit(6).map(this::parseHexByte).collect(
() -> new byte[strings.size()],
new BiConsumer<byte[], Byte>() {
private int i = -1;
@Override
public void accept(final byte[] bytes, final Byte aByte) {
bytes[++i] = aByte;
}
},
(bytes, bytes2) -> {
throw new UnsupportedOperationException("Parallel collect not supported");
});
}
/**
* Converts byte array to address string ,not separated with ":"
*/
default String byteArrayToMacUnseparated(byte[] address) {
checkArgument(address.length == 6, "Illegal array length");
return Hex.encodeHexString(address);
}
/**
* Converts byte array to address string ,separated with ":"
*/
default String byteArrayToMacSeparated(byte[] address) {
checkArgument(address.length == 6, "Illegal array length");
String unseparatedAddress = Hex.encodeHexString(address);
String separated = "";
for (int i = 0; i < unseparatedAddress.length(); i = i + 2) {
if (i == (unseparatedAddress.length() - 2)) {
separated = separated + unseparatedAddress.substring(0 + i, 2 + i);
} else {
separated = separated + unseparatedAddress.substring(0 + i, 2 + i) + ":";
}
}
return separated;
}
/**
* Converts MAC string to byte array
*/
default byte[] macToByteArray(String mac) {
checkNotNull(mac, "MAC cannot be null");
mac = mac.replace(":", "");
try {
return Hex.decodeHex(mac.toCharArray());
} catch (DecoderException e) {
throw new IllegalArgumentException("Unable to convert mac", e);
}
}
default byte parseHexByte(final String aByte) {
return (byte) Integer.parseInt(aByte, 16);
}
}
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