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POClassCast Exception in java
 

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  1. POClassCast Exception in java
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    <p>Iam writing a query in hibernate and my method is:</p> <pre><code>public String a(Object[] selectedAlarmId, Object[] selecteddeviceID, String loggedInUser, String clientIp, String role) throws Exception { int result = 0; b grp = new b(); try { Session hiberSession = HibernateSessionFactory.currentSession(); Transaction transaction = hiberSession.beginTransaction(); List deviceQueryList = null; String clauseAppender = ("select max(severity),devicenodeid from AlarmMappingBean where devicenodeid in (:devicelist) group by devicenodeid"); Query deviceQuery = hiberSession.createQuery(clauseAppender); deviceQuery.setParameterList("devicelist", selecteddeviceID); deviceQueryList = deviceQuery.list(); Iterator&lt;Object[]&gt; iter = deviceQueryList.iterator(); while(iter.hasNext()){ Object[] objAlarm = iter.next(); System.out.println(objAlarm.length); System.out.println("Severity - &gt; " + objAlarm[0]); System.out.println("Device Node ID - &gt; " + objAlarm[1]); Query updateMangedNode = hiberSession .createQuery("update ManagedNode set highestSeverity =? where nodeId = ?"); updateMangedNode.setParameter(0, objAlarm[0]); updateMangedNode.setParameter(1, Long.parseLong(objAlarm[1].toString())); //updateMangedNode.executeUpdate(); } // Long[] deviceArray =(Long[]) selecteddeviceID; Exception occurs here--&gt; Object[] devArray = (Long[]) selecteddeviceID; Query groupQuery = hiberSession .createQuery("select groupId from b where nodeId in (:devicelist)"); groupQuery.setParameterList("devicelist", devArray); List&lt;ManagedNode&gt; devicelist = new ArrayList&lt;ManagedNode&gt;(); devicelist = groupQuery.list(); if(!(devicelist.isEmpty() )){ Iterator&lt;ManagedNode&gt; itergroup =devicelist.iterator(); while(itergroup.hasNext()){ ManagedNode objgroup = itergroup.next(); grp.updateGroupHighestSeverity(objgroup.getGroupId()); } } transaction.commit(); } catch (Exception e) { e.printStackTrace(); throw e; } finally { HibernateSessionFactory.closeSession(); } return Integer.toString(result); } </code></pre> <p>Here the selecteddeviceId has values as [1234,12345, null, null] and query from the table b "select groupid from b where nodeid in(devicelist)" here datatype of groupid is int and nodeid is long</p> <blockquote> <p>It is giving me classcast exception as Ljava.lang.Object; cannot be cast to [Ljava.lang.Long;</p> </blockquote> <p>I am using <code>PostgresSQl</code></p> <p>Please help</p>
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    1. USadatapost
    1. USRachel
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    1. This table or related slice is empty.
    1. COselectedDeviceID sounds like a single long to me, not an array. And you should change the initialize from object[] selectedDeviceID to long[]
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      1. POClassCast Exception in java
      1. USRob
    2. COAs a general comment (and not addressing your immediate problem, so this is _not_ an answer) I advise trying to put the logging and transaction management in aspects if you can, as that lets you boil that rather-long method down to something that's just doing “real” work. I find that makes code much easier to read and understand.
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      1. USDonal Fellows
 

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