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POHashBiMap SerializationException or how to serialize classes where IsSerializable is not applicable?
 

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  1. POHashBiMap SerializationException or how to serialize classes where IsSerializable is not applicable?
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    <p>Problem seems to be that not all Guava classes are serializable out-of-the-box.</p> <p>I found a quite good solution to this and like to share it. (in this case for HashBiMap). (Maybe some Guava developers may apply this one day to ideally all of the classes)</p> <p>If you copy the below class (and maybe adjust it to your to-be-serializable class) you will have further investigation details inside the Javadoc comment already.</p> <pre><code>package com.google.common.collect; import java.util.LinkedHashMap; import java.util.Map; import com.google.gwt.user.client.rpc.SerializationException; import com.google.gwt.user.client.rpc.SerializationStreamReader; import com.google.gwt.user.client.rpc.SerializationStreamWriter; import com.google.gwt.user.client.rpc.core.java.util.Map_CustomFieldSerializerBase; /** * idea taken from some &lt;a href= * "http://code.google.com/r/baggiogamp-guava/source/browse/gwt-src/com/google/common/collect/RegularImmutableBiMap_CustomFieldSerializer.java?r=a7aa10ddb815ce7996f3fae103bfd3823b1336ed&amp;spec=svn6923b5fac0feb7005429d0b24be93b91685f9637" * &gt;com/google/common/collect/RegularImmutableBiMap_CustomFieldSerializer.java&lt;/ * a&gt; &lt;br/&gt; * Problem was, that {@link HashBiMap} seems not to be serializable for GWT: * &lt;ul&gt; * &lt;li&gt;it nor its super classes do not implement com.google.gwt.user.client.rpc.IsSerializable (why?)&lt;/li&gt; * &lt;li&gt;the following solution does not work if only applied to some super class, e.g. AbstractBiMap&lt;/li&gt; * &lt;/ul&gt; * &lt;pre&gt; * com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException: The response could not be deserialized at com.google.gwt.user.client.rpc.impl.RequestCallbackAdapter.onResponseReceived(RequestCallbackAdapter.java:221) at com.google.gwt.http.client.Request.fireOnResponseReceived(Request.java:287) at com.google.gwt.http.client.RequestBuilder$1.onReadyStateChange(RequestBuilder.java:395) at sun.reflect.GeneratedMethodAccessor119.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103) at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71) at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172) at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338) at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219) at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136) at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571) at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279) at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91) at com.google.gwt.core.client.impl.Impl.apply(Impl.java) at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:242) at sun.reflect.GeneratedMethodAccessor116.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103) at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71) at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172) at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:293) at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547) at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364) at java.lang.Thread.run(Unknown Source) Caused by: com.google.gwt.user.client.rpc.SerializationException: com.google.common.collect.HashBiMap/1352983899 at com.google.gwt.user.client.rpc.impl.SerializerBase.getTypeHandler(SerializerBase.java:153) at com.google.gwt.user.client.rpc.impl.SerializerBase.instantiate(SerializerBase.java:114) at com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader.deserialize(ClientSerializationStreamReader.java:396) at com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamReader.readObject(AbstractSerializationStreamReader.java:119) at mycomp.shared.conf.Config_FieldSerializer.deserialize(Config_FieldSerializer.java:12) at mycomp.shared.conf.Config_FieldSerializer.deserial(Config_FieldSerializer.java:35) at com.google.gwt.user.client.rpc.impl.SerializerBase.deserialize(SerializerBase.java:95) at com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader.deserialize(ClientSerializationStreamReader.java:398) at com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamReader.readObject(AbstractSerializationStreamReader.java:119) at com.google.gwt.user.client.rpc.impl.RequestCallbackAdapter$ResponseReader$8.read(RequestCallbackAdapter.java:106) at com.google.gwt.user.client.rpc.impl.RequestCallbackAdapter.onResponseReceived(RequestCallbackAdapter.java:214) at com.google.gwt.http.client.Request.fireOnResponseReceived(Request.java:287) at com.google.gwt.http.client.RequestBuilder$1.onReadyStateChange(RequestBuilder.java:395) at sun.reflect.GeneratedMethodAccessor119.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103) at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71) at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172) at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338) at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219) at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136) at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571) at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279) at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91) at com.google.gwt.core.client.impl.Impl.apply(Impl.java) at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:242) at sun.reflect.GeneratedMethodAccessor116.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103) at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71) at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172) at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:293) at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547) at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364) at java.lang.Thread.run(Unknown Source) * &lt;/pre&gt; * * @author ADietrich * */ public class HashBiMap_CustomFieldSerializer { public static void deserialize(SerializationStreamReader reader, HashBiMap&lt;?, ?&gt; instance) { } public static HashBiMap&lt;Object, Object&gt; instantiate( SerializationStreamReader reader) throws SerializationException { Map&lt;Object, Object&gt; entries = new LinkedHashMap&lt;Object, Object&gt;(); Map_CustomFieldSerializerBase.deserialize(reader, entries); return HashBiMap.create(entries); } public static void serialize(SerializationStreamWriter writer, HashBiMap&lt;?, ?&gt; instance) throws SerializationException { Map_CustomFieldSerializerBase.serialize(writer, instance); } } </code></pre>
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    1. USAndreas Dietrich
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    1. CO[It's ok to ask and answer your own question](http://blog.stackoverflow.com/2011/07/its-ok-to-ask-and-answer-your-own-questions/), but you'll have to split it into a question and an answer post!
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      1. POHashBiMap SerializationException or how to serialize classes where IsSerializable is not applicable?
      1. USChris Lercher
    2. COI wanted to do this, but new users can only answer their own questions after 8 hours :-/
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      1. POHashBiMap SerializationException or how to serialize classes where IsSerializable is not applicable?
      1. USAndreas Dietrich
    3. COI don't get it. `HashBiMap` is `Serializable`, are you using some older version?
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      1. POHashBiMap SerializationException or how to serialize classes where IsSerializable is not applicable?
      1. USmaaartinus
 

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