/* * Copyright (c) 2007-present, 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 org.threeten.bp; import java.io.DataInput; import java.io.DataOutput; import java.io.Externalizable; import java.io.IOException; import java.io.InvalidClassException; import java.io.ObjectInput; import java.io.ObjectOutput; import java.io.StreamCorruptedException; /** * The shared serialization delegate for this package. * * <h4>Implementation notes</h4> * 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 LOCAL_DATE_TYPE_VERSION_2 = 21}. * <p> * 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. * <p> * 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. * <p> * This class is mutable and should be created once per serialization. * * @serial include */ final class Ser implements Externalizable { /** * Serialization version. */ private static final long serialVersionUID = -7683839454370182990L; static final byte DURATION_TYPE = 1; static final byte INSTANT_TYPE = 2; static final byte LOCAL_DATE_TYPE = 3; static final byte LOCAL_DATE_TIME_TYPE = 4; static final byte LOCAL_TIME_TYPE = 5; static final byte ZONED_DATE_TIME_TYPE = 6; static final byte ZONE_REGION_TYPE = 7; static final byte ZONE_OFFSET_TYPE = 8; static final byte MONTH_DAY_TYPE = 64; static final byte OFFSET_TIME_TYPE = 66; static final byte YEAR_TYPE = 67; static final byte YEAR_MONTH_TYPE = 68; static final byte OFFSET_DATE_TIME_TYPE = 69; /** 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 */ public void writeExternal(ObjectOutput out) throws IOException { writeInternal(type, object, out); } static void writeInternal(byte type, Object object, DataOutput out) throws IOException { out.writeByte(type); switch (type) { case DURATION_TYPE: ((Duration) object).writeExternal(out); break; case INSTANT_TYPE: ((Instant) object).writeExternal(out); break; case LOCAL_DATE_TYPE: ((LocalDate) object).writeExternal(out); break; case LOCAL_DATE_TIME_TYPE: ((LocalDateTime) object).writeExternal(out); break; case LOCAL_TIME_TYPE: ((LocalTime) object).writeExternal(out); break; case MONTH_DAY_TYPE: ((MonthDay) object).writeExternal(out); break; case OFFSET_DATE_TIME_TYPE: ((OffsetDateTime) object).writeExternal(out); break; case OFFSET_TIME_TYPE: ((OffsetTime) object).writeExternal(out); break; case YEAR_MONTH_TYPE: ((YearMonth) object).writeExternal(out); break; case YEAR_TYPE: ((Year) object).writeExternal(out); break; case ZONE_REGION_TYPE: ((ZoneRegion) object).writeExternal(out); break; case ZONE_OFFSET_TYPE: ((ZoneOffset) object).writeExternal(out); break; case ZONED_DATE_TIME_TYPE: ((ZonedDateTime) 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 */ public void readExternal(ObjectInput in) throws IOException { type = in.readByte(); object = readInternal(type, in); } static Object read(DataInput in) throws IOException { byte type = in.readByte(); return readInternal(type, in); } private static Object readInternal(byte type, DataInput in) throws IOException { switch (type) { case DURATION_TYPE: return Duration.readExternal(in); case INSTANT_TYPE: return Instant.readExternal(in); case LOCAL_DATE_TYPE: return LocalDate.readExternal(in); case LOCAL_DATE_TIME_TYPE: return LocalDateTime.readExternal(in); case LOCAL_TIME_TYPE: return LocalTime.readExternal(in); case MONTH_DAY_TYPE: return MonthDay.readExternal(in); case OFFSET_DATE_TIME_TYPE: return OffsetDateTime.readExternal(in); case OFFSET_TIME_TYPE: return OffsetTime.readExternal(in); case YEAR_TYPE: return Year.readExternal(in); case YEAR_MONTH_TYPE: return YearMonth.readExternal(in); case ZONED_DATE_TIME_TYPE: return ZonedDateTime.readExternal(in); case ZONE_OFFSET_TYPE: return ZoneOffset.readExternal(in); case ZONE_REGION_TYPE: return ZoneRegion.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; } }