Java tutorial
/* * Copyright (C) 2014 The Calrissian Authors * * 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 org.calrissian.mango.types.encoders.lexi; import org.apache.commons.codec.DecoderException; import org.calrissian.mango.types.encoders.AbstractInet4AddressEncoder; import org.calrissian.mango.types.exception.TypeDecodingException; import java.net.Inet4Address; import java.net.UnknownHostException; import static com.google.common.base.Preconditions.checkArgument; import static com.google.common.base.Preconditions.checkNotNull; import static java.net.InetAddress.getByAddress; import static org.apache.commons.codec.binary.Hex.decodeHex; import static org.apache.commons.codec.binary.Hex.encodeHexString; public class Inet4AddressEncoder extends AbstractInet4AddressEncoder<String> { @Override public String encode(Inet4Address value) { checkNotNull(value, "Null values are not allowed"); return encodeHexString(value.getAddress()); } @Override public Inet4Address decode(String value) { checkNotNull(value, "Null values are not allowed"); checkArgument(value.length() == 8, "The value is not a valid encoding"); try { return (Inet4Address) getByAddress(decodeHex(value.toCharArray())); } catch (UnknownHostException | DecoderException e) { throw new TypeDecodingException(e); } } }