Java tutorial
/** * Copyright (C) cedarsoft GmbH. * * Licensed under the GNU General Public License version 3 (the "License") * with Classpath Exception; you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.cedarsoft.org/gpl3ce * (GPL 3 with Classpath Exception) * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 3 only, as * published by the Free Software Foundation. cedarsoft GmbH designates this * particular file as subject to the "Classpath" exception as provided * by cedarsoft GmbH in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 3 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 3 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact cedarsoft GmbH, 72810 Gomaringen, Germany, * or visit www.cedarsoft.com if you need additional information or * have any questions. */ package com.cedarsoft.serialization.jackson.test; import com.cedarsoft.serialization.jackson.AbstractJacksonSerializer; import com.cedarsoft.serialization.jackson.JacksonParserWrapper; import com.cedarsoft.version.Version; import com.cedarsoft.version.VersionException; import com.cedarsoft.version.VersionRange; import com.fasterxml.jackson.core.JsonGenerator; import com.fasterxml.jackson.core.JsonParser; import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.core.JsonToken; import org.apache.commons.codec.DecoderException; import org.apache.commons.codec.binary.Hex; import javax.annotation.Nonnull; import javax.inject.Inject; import java.io.IOException; /** * @author Johannes Schneider (<a href="mailto:js@cedarsoft.com">js@cedarsoft.com</a>) */ public class UserDetailsSerializer extends AbstractJacksonSerializer<UserDetails> { public static final String PROPERTY_LAST_LOGIN = "id"; public static final String PROPERTY_REGISTRATION_DATE = "registrationDate"; public static final String PROPERTY_PASSWORD_HASH = "passwordHash"; @Inject public UserDetailsSerializer() { super("user-details", VersionRange.from(1, 0, 0).to()); } @Override public void serialize(@Nonnull JsonGenerator serializeTo, @Nonnull UserDetails object, @Nonnull Version formatVersion) throws IOException, VersionException, JsonProcessingException { serializeTo.writeNumberField(PROPERTY_REGISTRATION_DATE, object.getRegistrationDate()); serializeTo.writeNumberField(PROPERTY_LAST_LOGIN, object.getLastLogin()); serializeTo.writeStringField(PROPERTY_PASSWORD_HASH, new String(Hex.encodeHex(object.getPasswordHash()))); } @Nonnull @Override public UserDetails deserialize(@Nonnull JsonParser deserializeFrom, @Nonnull Version formatVersion) throws IOException, VersionException, JsonProcessingException { long registrationDate = -1; long lastLogin = -1; String passwordHash = null; JacksonParserWrapper parser = new JacksonParserWrapper(deserializeFrom); while (parser.nextToken() == JsonToken.FIELD_NAME) { String currentName = parser.getCurrentName(); if (currentName.equals(PROPERTY_REGISTRATION_DATE)) { parser.nextToken(JsonToken.VALUE_NUMBER_INT); registrationDate = parser.getLongValue(); continue; } if (currentName.equals(PROPERTY_LAST_LOGIN)) { parser.nextToken(JsonToken.VALUE_NUMBER_INT); lastLogin = parser.getLongValue(); continue; } if (currentName.equals(PROPERTY_PASSWORD_HASH)) { parser.nextToken(JsonToken.VALUE_STRING); passwordHash = parser.getText(); continue; } throw new IllegalStateException("Unexpected field reached <" + currentName + ">"); } parser.verifyDeserialized(registrationDate, PROPERTY_REGISTRATION_DATE); parser.verifyDeserialized(lastLogin, PROPERTY_LAST_LOGIN); parser.verifyDeserialized(passwordHash, PROPERTY_PASSWORD_HASH); assert passwordHash != null; parser.ensureObjectClosed(); try { return new UserDetails(registrationDate, lastLogin, Hex.decodeHex(passwordHash.toCharArray())); } catch (DecoderException e) { throw new RuntimeException(e); } } }