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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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/*
*
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* 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.
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* * 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.
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* * Neither the name of JSR-310 nor the names of its contributors
* may be used to endorse or promote products derived from this software
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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package java.time.zone;
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;
import java.time.ZoneOffset;
/**
* The shared serialization delegate for this package.
*
* @implNote
* 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 = -8885321777449118786L;
/** Type for ZoneRules. */
static final byte ZRULES = 1;
/** Type for ZoneOffsetTransition. */
static final byte ZOT = 2;
/** Type for ZoneOffsetTransition. */
static final byte ZOTRULE = 3;
/** 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.
* @serialData
* Each serializable class is mapped to a type that is the first byte
* in the stream. Refer to each class {@code writeReplace}
* serialized form for the value of the type and sequence of values for the type.
*
* <ul>
* <li><a href="../../../serialized-form.html#java.time.zone.ZoneRules">ZoneRules.writeReplace</a>
* <li><a href="../../../serialized-form.html#java.time.zone.ZoneOffsetTransition">ZoneOffsetTransition.writeReplace</a>
* <li><a href="../../../serialized-form.html#java.time.zone.ZoneOffsetTransitionRule">ZoneOffsetTransitionRule.writeReplace</a>
* </ul>
*
* @param out the data stream to write to, not null
*/
@Override
public void writeExternal(ObjectOutput out) throws IOException {
writeInternal(type, object, out);
}
static void write(Object object, DataOutput out) throws IOException {
writeInternal(ZRULES, object, out);
}
private static void writeInternal(byte type, Object object, DataOutput out) throws IOException {
out.writeByte(type);
switch (type) {
case ZRULES:
((ZoneRules) object).writeExternal(out);
break;
case ZOT:
((ZoneOffsetTransition) object).writeExternal(out);
break;
case ZOTRULE:
((ZoneOffsetTransitionRule) object).writeExternal(out);
break;
default:
throw new InvalidClassException("Unknown serialized type");
}
}
//-----------------------------------------------------------------------
/**
* Implements the {@code Externalizable} interface to read the object.
* @serialData
* The streamed type and parameters defined by the type's {@code writeReplace}
* method are read and passed to the corresponding static factory for the type
* to create a new instance. That instance is returned as the de-serialized
* {@code Ser} object.
*
* <ul>
* <li><a href="../../../serialized-form.html#java.time.zone.ZoneRules">ZoneRules</a>
* - {@code ZoneRules.of(standardTransitions, standardOffsets, savingsInstantTransitions, wallOffsets, lastRules);}
* <li><a href="../../../serialized-form.html#java.time.zone.ZoneOffsetTransition">ZoneOffsetTransition</a>
* - {@code ZoneOffsetTransition of(LocalDateTime.ofEpochSecond(epochSecond), offsetBefore, offsetAfter);}
* <li><a href="../../../serialized-form.html#java.time.zone.ZoneOffsetTransitionRule">ZoneOffsetTransitionRule</a>
* - {@code ZoneOffsetTransitionRule.of(month, dom, dow, time, timeEndOfDay, timeDefinition, standardOffset, offsetBefore, offsetAfter);}
* </ul>
* @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(DataInput in) throws IOException, ClassNotFoundException {
byte type = in.readByte();
return readInternal(type, in);
}
private static Object readInternal(byte type, DataInput in) throws IOException, ClassNotFoundException {
switch (type) {
case ZRULES:
return ZoneRules.readExternal(in);
case ZOT:
return ZoneOffsetTransition.readExternal(in);
case ZOTRULE:
return ZoneOffsetTransitionRule.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;
}
//-----------------------------------------------------------------------
/**
* Writes the state to the stream.
*
* @param offset the offset, not null
* @param out the output stream, not null
* @throws IOException if an error occurs
*/
static void writeOffset(ZoneOffset offset, DataOutput out) throws IOException {
final int offsetSecs = offset.getTotalSeconds();
int offsetByte = offsetSecs % 900 == 0 ? offsetSecs / 900 : 127; // compress to -72 to +72
out.writeByte(offsetByte);
if (offsetByte == 127) {
out.writeInt(offsetSecs);
}
}
/**
* Reads the state from the stream.
*
* @param in the input stream, not null
* @return the created object, not null
* @throws IOException if an error occurs
*/
static ZoneOffset readOffset(DataInput in) throws IOException {
int offsetByte = in.readByte();
return (offsetByte == 127 ? ZoneOffset.ofTotalSeconds(in.readInt()) : ZoneOffset.ofTotalSeconds(offsetByte * 900));
}
//-----------------------------------------------------------------------
/**
* Writes the state to the stream.
*
* @param epochSec the epoch seconds, not null
* @param out the output stream, not null
* @throws IOException if an error occurs
*/
static void writeEpochSec(long epochSec, DataOutput out) throws IOException {
if (epochSec >= -4575744000L && epochSec < 10413792000L && epochSec % 900 == 0) { // quarter hours between 1825 and 2300
int store = (int) ((epochSec + 4575744000L) / 900);
out.writeByte((store >>> 16) & 255);
out.writeByte((store >>> 8) & 255);
out.writeByte(store & 255);
} else {
out.writeByte(255);
out.writeLong(epochSec);
}
}
/**
* Reads the state from the stream.
*
* @param in the input stream, not null
* @return the epoch seconds, not null
* @throws IOException if an error occurs
*/
static long readEpochSec(DataInput in) throws IOException {
int hiByte = in.readByte() & 255;
if (hiByte == 255) {
return in.readLong();
} else {
int midByte = in.readByte() & 255;
int loByte = in.readByte() & 255;
long tot = ((hiByte << 16) + (midByte << 8) + loByte);
return (tot * 900) - 4575744000L;
}
}
}