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POcould not persist data of format map<string,Arraylist> in jdo
 

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  1. POcould not persist data of format map<string,Arraylist> in jdo
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    <p>iam trying to persist a Hashmap data in JDO.</p> <p>initially i created a Hashmap like </p> <pre><code>Map&lt;Integer,String&gt; dat=new HashMap&lt;Integer,String&gt;(); </code></pre> <p>and this worked perfectly and i was able to save data., but when i tried </p> <pre><code>Map&lt;Integer, ArrayList&lt;String&gt;&gt; dat=new HashMap&lt;Integer,ArrayList&lt;String&gt;&gt;(); </code></pre> <p>i got an error like this data: java.util.ArrayList is not a supported property type.</p> <p>am i using a non supported data type ?? is there a better alternative ?? i am just doing this for learning purpose ...so your ideas will be very helpful ..ty</p> <p>complete code</p> <p>servlet.java</p> <pre><code>public class JdocheckServlet extends HttpServlet { public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException { resp.setContentType("text/plain"); Map&lt;Integer, ArrayList&lt;String&gt;&gt; dat=new HashMap&lt;Integer,ArrayList&lt;String&gt;&gt;(); ArrayList&lt;String&gt; s=new ArrayList&lt;String&gt;(); ArrayList&lt;String&gt; s2=new ArrayList&lt;String&gt;(); s.add("abc"); s.add("abc2"); s.add("abc3"); s2.add("ab4c"); s2.add("ab4c2"); s2.add("ab4c3"); dat.put(23, s); dat.put(25, s2); System.out.println(dat); data d=new data(); PersistenceManager pm=PMF.get().getPersistenceManager(); d.setData(dat); pm.makePersistent(d); }} </code></pre> <p>data.java</p> <pre><code>@PersistenceCapable public class data { @Persistent private Map&lt;Integer, ArrayList&lt;String&gt;&gt; data; public Map&lt;Integer, ArrayList&lt;String&gt;&gt; getData() { return data; } public void setData(Map&lt;Integer, ArrayList&lt;String&gt;&gt; dat) { this.data = dat; } } </code></pre> <p>error thrown when accessing the servlet</p> <pre><code>HTTP ERROR 500 Problem accessing /jdocheck. Reason: data: java.util.ArrayList is not a supported property type. Caused by: java.lang.IllegalArgumentException: data: java.util.ArrayList is not a supported property type. at com.google.appengine.api.datastore.DataTypeUtils.checkSupportedSingleValue(DataTypeUtils.java:186) at com.google.appengine.api.datastore.DataTypeUtils.checkSupportedValue(DataTypeUtils.java:151) at com.google.appengine.api.datastore.DataTypeUtils.checkSupportedValue(DataTypeUtils.java:125) at com.google.appengine.api.datastore.PropertyContainer.setProperty(PropertyContainer.java:102) at com.google.appengine.datanucleus.EntityUtils.setEntityProperty(EntityUtils.java:172) at com.google.appengine.datanucleus.StoreFieldManager.storeFieldInEntity(StoreFieldManager.java:360) at com.google.appengine.datanucleus.StoreFieldManager.storeObjectField(StoreFieldManager.java:186) at org.datanucleus.state.AbstractStateManager.providedObjectField(AbstractStateManager.java:1447) at jc.data.jdoProvideField(data.java) at jc.data.jdoProvideFields(data.java) at org.datanucleus.state.AbstractStateManager.provideFields(AbstractStateManager.java:1515) at com.google.appengine.datanucleus.DatastorePersistenceHandler.insertObjectsInternal(DatastorePersistenceHandler.java:242) at com.google.appengine.datanucleus.BatchPutManager.processBatchState(BatchPutManager.java:34) at com.google.appengine.datanucleus.BatchManager.finish(BatchManager.java:54) at com.google.appengine.datanucleus.DatastorePersistenceHandler.batchEnd(DatastorePersistenceHandler.java:194) at org.datanucleus.ObjectManagerImpl.persistObjects(ObjectManagerImpl.java:1723) at org.datanucleus.api.jdo.JDOPersistenceManager.makePersistentAll(JDOPersistenceManager.java:779) at org.datanucleus.api.jdo.JDOPersistenceManager.makePersistentAll(JDOPersistenceManager.java:764) at jc.JdocheckServlet.doGet(JdocheckServlet.java:37) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:35) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:60) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:97) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:94) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:370) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) </code></pre>
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    1. PTQuestion
    1. US1and0
    1. US1and0
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      1. PTAnswer
    1. This table or related slice is empty.
    1. COIn what circumstances did you get your error? At compile time? Against which line?
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      1. POcould not persist data of format map<string,Arraylist> in jdo
      1. USIan Marshall
    2. COduring compile time wait ill post complete error generated in the question itself
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      1. POcould not persist data of format map<string,Arraylist> in jdo
      1. US1and0
    3. COi have added the error generated ... @lan Marshall
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      1. POcould not persist data of format map<string,Arraylist> in jdo
      1. US1and0
 

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