/* * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle 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 2 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 * 2 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* * Copyright (c) 2011-2012, Stephen Colebourne & Michael Nascimento Santos * * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * * Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * * Neither the name of JSR-310 nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package java.time.temporal; import java.io.Externalizable; import java.io.IOException; import java.io.InvalidClassException; import java.io.ObjectInput; import java.io.ObjectOutput; import java.io.StreamCorruptedException; import java.time.LocalDate; import java.time.LocalDateTime; /** * The shared serialization delegate for this package. * *

Implementation notes

* This class wraps the object being serialized, and takes a byte representing the type of the class to * be serialized. This byte can also be used for versioning the serialization format. In this case another * byte flag would be used in order to specify an alternative version of the type format. * For example {@code CHRONO_TYPE_VERSION_2 = 21} *

* In order to serialise the object it writes its byte and then calls back to the appropriate class where * the serialisation is performed. In order to deserialise the object it read in the type byte, switching * in order to select which class to call back into. *

* The serialisation format is determined on a per class basis. In the case of field based classes each * of the fields is written out with an appropriate size format in descending order of the field's size. For * example in the case of {@link LocalDate} year is written before month. Composite classes, such as * {@link LocalDateTime} are serialised as one object. Enum classes are serialised using the index of their * element. *

* This class is mutable and should be created once per serialization. * * @serial include * @since 1.8 */ final class Ser implements Externalizable { /** * Serialization version. */ private static final long serialVersionUID = -6103370247208168577L; static final byte OFFSET_DATE_TYPE = 1; static final byte OFFSET_TIME_TYPE = 2; static final byte OFFSET_DATE_TIME_TYPE = 3; static final byte YEAR_TYPE = 4; static final byte YEAR_MONTH_TYPE = 5; static final byte MONTH_DAY_TYPE = 6; static final byte CHRONO_TYPE = 7; static final byte CHRONO_LOCAL_DATE_TIME_TYPE = 8; static final byte CHRONO_ZONE_DATE_TIME_TYPE = 9; static final byte SIMPLE_PERIOD_TYPE = 10; /** The type being serialized. */ private byte type; /** The object being serialized. */ private Object object; /** * Constructor for deserialization. */ public Ser() { } /** * Creates an instance for serialization. * * @param type the type * @param object the object */ Ser(byte type, Object object) { this.type = type; this.object = object; } //----------------------------------------------------------------------- /** * Implements the {@code Externalizable} interface to write the object. * * @param out the data stream to write to, not null */ @Override public void writeExternal(ObjectOutput out) throws IOException { writeInternal(type, object, out); } private static void writeInternal(byte type, Object object, ObjectOutput out) throws IOException { out.writeByte(type); switch (type) { case OFFSET_DATE_TYPE: ((OffsetDate) object).writeExternal(out); break; case OFFSET_TIME_TYPE: ((OffsetTime) object).writeExternal(out); break; case OFFSET_DATE_TIME_TYPE: ((OffsetDateTime) object).writeExternal(out); break; case YEAR_TYPE: ((Year) object).writeExternal(out); break; case YEAR_MONTH_TYPE: ((YearMonth) object).writeExternal(out); break; case MONTH_DAY_TYPE: ((MonthDay) object).writeExternal(out); break; case CHRONO_TYPE: ((Chrono) object).writeExternal(out); break; case CHRONO_LOCAL_DATE_TIME_TYPE: ((ChronoLocalDateTimeImpl) object).writeExternal(out); break; case CHRONO_ZONE_DATE_TIME_TYPE: ((ChronoZonedDateTimeImpl) object).writeExternal(out); break; case SIMPLE_PERIOD_TYPE: ((SimplePeriod) object).writeExternal(out); break; default: throw new InvalidClassException("Unknown serialized type"); } } //----------------------------------------------------------------------- /** * Implements the {@code Externalizable} interface to read the object. * * @param in the data to read, not null */ @Override public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException { type = in.readByte(); object = readInternal(type, in); } static Object read(ObjectInput in) throws IOException, ClassNotFoundException { byte type = in.readByte(); return readInternal(type, in); } private static Object readInternal(byte type, ObjectInput in) throws IOException, ClassNotFoundException { switch (type) { case OFFSET_DATE_TYPE: return OffsetDate.readExternal(in); case OFFSET_TIME_TYPE: return OffsetTime.readExternal(in); case OFFSET_DATE_TIME_TYPE: return OffsetDateTime.readExternal(in); case YEAR_TYPE: return Year.readExternal(in); case YEAR_MONTH_TYPE: return YearMonth.readExternal(in); case MONTH_DAY_TYPE: return MonthDay.readExternal(in); case CHRONO_TYPE: return Chrono.readExternal(in); case CHRONO_LOCAL_DATE_TIME_TYPE: return ChronoLocalDateTimeImpl.readExternal(in); case CHRONO_ZONE_DATE_TIME_TYPE: return ChronoZonedDateTimeImpl.readExternal(in); case SIMPLE_PERIOD_TYPE: return SimplePeriod.readExternal(in); default: throw new StreamCorruptedException("Unknown serialized type"); } } /** * Returns the object that will replace this one. * * @return the read object, should never be null */ private Object readResolve() { return object; } }