author | sherman |
Thu, 14 Aug 2014 15:54:04 -0700 | |
changeset 25986 | 12bcf9a5994f |
parent 21331 | 8ee181e7e48b |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/* |
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* This file is available under and governed by the GNU General Public |
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* License version 2 only, as published by the Free Software Foundation. |
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* However, the following notice accompanied the original version of this |
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* file: |
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* |
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* Copyright (c) 2011-2012, Stephen Colebourne & Michael Nascimento Santos |
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* |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* * Redistributions of source code must retain the above copyright notice, |
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* this list of conditions and the following disclaimer. |
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* |
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* * Redistributions in binary form must reproduce the above copyright notice, |
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* this list of conditions and the following disclaimer in the documentation |
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* and/or other materials provided with the distribution. |
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* |
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* * Neither the name of JSR-310 nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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package java.time.zone; |
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import java.io.DataInput; |
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import java.io.DataOutput; |
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import java.io.Externalizable; |
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import java.io.IOException; |
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import java.io.InvalidClassException; |
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import java.io.ObjectInput; |
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import java.io.ObjectOutput; |
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import java.io.StreamCorruptedException; |
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import java.time.ZoneOffset; |
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/** |
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* The shared serialization delegate for this package. |
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* |
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* @implNote |
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* This class is mutable and should be created once per serialization. |
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* |
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* @serial include |
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* @since 1.8 |
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*/ |
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final class Ser implements Externalizable { |
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/** |
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* Serialization version. |
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*/ |
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private static final long serialVersionUID = -8885321777449118786L; |
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/** Type for ZoneRules. */ |
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static final byte ZRULES = 1; |
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/** Type for ZoneOffsetTransition. */ |
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static final byte ZOT = 2; |
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/** Type for ZoneOffsetTransition. */ |
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static final byte ZOTRULE = 3; |
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/** The type being serialized. */ |
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private byte type; |
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/** The object being serialized. */ |
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private Object object; |
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/** |
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* Constructor for deserialization. |
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*/ |
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public Ser() { |
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} |
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/** |
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* Creates an instance for serialization. |
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* |
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* @param type the type |
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* @param object the object |
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*/ |
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Ser(byte type, Object object) { |
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this.type = type; |
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this.object = object; |
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} |
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//----------------------------------------------------------------------- |
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/** |
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* Implements the {@code Externalizable} interface to write the object. |
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* @serialData |
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* Each serializable class is mapped to a type that is the first byte |
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* in the stream. Refer to each class {@code writeReplace} |
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* serialized form for the value of the type and sequence of values for the type. |
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* |
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* <ul> |
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* <li><a href="../../../serialized-form.html#java.time.zone.ZoneRules">ZoneRules.writeReplace</a> |
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* <li><a href="../../../serialized-form.html#java.time.zone.ZoneOffsetTransition">ZoneOffsetTransition.writeReplace</a> |
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* <li><a href="../../../serialized-form.html#java.time.zone.ZoneOffsetTransitionRule">ZoneOffsetTransitionRule.writeReplace</a> |
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* </ul> |
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* |
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* @param out the data stream to write to, not null |
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*/ |
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@Override |
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public void writeExternal(ObjectOutput out) throws IOException { |
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writeInternal(type, object, out); |
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} |
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static void write(Object object, DataOutput out) throws IOException { |
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writeInternal(ZRULES, object, out); |
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} |
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private static void writeInternal(byte type, Object object, DataOutput out) throws IOException { |
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out.writeByte(type); |
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switch (type) { |
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case ZRULES: |
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((ZoneRules) object).writeExternal(out); |
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break; |
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case ZOT: |
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((ZoneOffsetTransition) object).writeExternal(out); |
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break; |
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case ZOTRULE: |
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((ZoneOffsetTransitionRule) object).writeExternal(out); |
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break; |
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default: |
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throw new InvalidClassException("Unknown serialized type"); |
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} |
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} |
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//----------------------------------------------------------------------- |
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/** |
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* Implements the {@code Externalizable} interface to read the object. |
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* @serialData |
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* The streamed type and parameters defined by the type's {@code writeReplace} |
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* method are read and passed to the corresponding static factory for the type |
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* to create a new instance. That instance is returned as the de-serialized |
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* {@code Ser} object. |
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* |
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* <ul> |
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* <li><a href="../../../serialized-form.html#java.time.zone.ZoneRules">ZoneRules</a> |
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* - {@code ZoneRules.of(standardTransitions, standardOffsets, savingsInstantTransitions, wallOffsets, lastRules);} |
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* <li><a href="../../../serialized-form.html#java.time.zone.ZoneOffsetTransition">ZoneOffsetTransition</a> |
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* - {@code ZoneOffsetTransition of(LocalDateTime.ofEpochSecond(epochSecond), offsetBefore, offsetAfter);} |
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* <li><a href="../../../serialized-form.html#java.time.zone.ZoneOffsetTransitionRule">ZoneOffsetTransitionRule</a> |
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* - {@code ZoneOffsetTransitionRule.of(month, dom, dow, time, timeEndOfDay, timeDefinition, standardOffset, offsetBefore, offsetAfter);} |
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* </ul> |
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* @param in the data to read, not null |
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*/ |
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@Override |
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public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException { |
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type = in.readByte(); |
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object = readInternal(type, in); |
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} |
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static Object read(DataInput in) throws IOException, ClassNotFoundException { |
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byte type = in.readByte(); |
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return readInternal(type, in); |
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} |
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private static Object readInternal(byte type, DataInput in) throws IOException, ClassNotFoundException { |
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switch (type) { |
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case ZRULES: |
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return ZoneRules.readExternal(in); |
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case ZOT: |
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return ZoneOffsetTransition.readExternal(in); |
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case ZOTRULE: |
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return ZoneOffsetTransitionRule.readExternal(in); |
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default: |
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throw new StreamCorruptedException("Unknown serialized type"); |
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} |
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} |
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/** |
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* Returns the object that will replace this one. |
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* |
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* @return the read object, should never be null |
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*/ |
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private Object readResolve() { |
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return object; |
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} |
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//----------------------------------------------------------------------- |
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/** |
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* Writes the state to the stream. |
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* |
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* @param offset the offset, not null |
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* @param out the output stream, not null |
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* @throws IOException if an error occurs |
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*/ |
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static void writeOffset(ZoneOffset offset, DataOutput out) throws IOException { |
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final int offsetSecs = offset.getTotalSeconds(); |
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int offsetByte = offsetSecs % 900 == 0 ? offsetSecs / 900 : 127; // compress to -72 to +72 |
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out.writeByte(offsetByte); |
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if (offsetByte == 127) { |
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out.writeInt(offsetSecs); |
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} |
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} |
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/** |
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* Reads the state from the stream. |
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* |
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* @param in the input stream, not null |
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* @return the created object, not null |
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* @throws IOException if an error occurs |
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*/ |
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static ZoneOffset readOffset(DataInput in) throws IOException { |
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int offsetByte = in.readByte(); |
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return (offsetByte == 127 ? ZoneOffset.ofTotalSeconds(in.readInt()) : ZoneOffset.ofTotalSeconds(offsetByte * 900)); |
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} |
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//----------------------------------------------------------------------- |
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/** |
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* Writes the state to the stream. |
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* |
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* @param epochSec the epoch seconds, not null |
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* @param out the output stream, not null |
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* @throws IOException if an error occurs |
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*/ |
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static void writeEpochSec(long epochSec, DataOutput out) throws IOException { |
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if (epochSec >= -4575744000L && epochSec < 10413792000L && epochSec % 900 == 0) { // quarter hours between 1825 and 2300 |
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int store = (int) ((epochSec + 4575744000L) / 900); |
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out.writeByte((store >>> 16) & 255); |
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out.writeByte((store >>> 8) & 255); |
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out.writeByte(store & 255); |
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} else { |
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out.writeByte(255); |
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out.writeLong(epochSec); |
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} |
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} |
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/** |
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* Reads the state from the stream. |
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* |
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* @param in the input stream, not null |
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* @return the epoch seconds, not null |
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* @throws IOException if an error occurs |
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*/ |
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static long readEpochSec(DataInput in) throws IOException { |
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int hiByte = in.readByte() & 255; |
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if (hiByte == 255) { |
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return in.readLong(); |
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} else { |
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int midByte = in.readByte() & 255; |
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int loByte = in.readByte() & 255; |
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long tot = ((hiByte << 16) + (midByte << 8) + loByte); |
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return (tot * 900) - 4575744000L; |
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} |
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} |
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} |