If inconsistency of declaration?

Yay! Another post from me!

I have an if statement in a bean which seems to be the treatment very well when I create a java test class, but does not work correctly when the bean is called by a jsp page.

My code, let me show you it:

First of all, the test class:

package com.serco.inquire;

import java.util.*;
import java.text.*;

public class TestCollection {
          
     public static void main(String[] args) {
          IrCollection myCollection = new IrCollection();
          myCollection.setSort("none");
          myCollection.setMgrid("none");
          int endpoint = myCollection.getSize();
          for (int i=0;i<endpoint;i++) {
               InquireRecord curRec = myCollection.getCurRecords(i);
               Long milis = new Long(curRec.getSubmitDate());
               Date theDate = new Date(milis);
               Format formatter = new SimpleDateFormat("dd MMM yyyy");
               String s = formatter.format(theDate);
               System.out.println("ID: " + curRec.getID() + " | Subject: " + curRec.getSubject());
          }
     }
          
}

a snippit of the class IrCollection, which he called:

private void processSort(String datum) {
          int LastChar = datum.length()-1;
          String colName = datum.substring(0, LastChar);
          if (datum=="none") {
               this.fullSort  = " ORDER BY lastUpdated DESC";
          } else {
               if (datum.endsWith("2")) {
                    this.fullSort = " ORDER BY " + colName + " ASC";
               } else {
                    this.fullSort = " ORDER BY " + colName + " DESC";
               }
          }
     }

There is more code in another method that calls this particular method by using:

this.processSort(this.sort);

But the problem is that if (reference is 'none') part in the second code example. Given that 10 of the first class line defines the kind of member variable 'None', the processSort() method must set the Member fullSort to "LastUpdated ORDER BY DESC" variable

And if I use the class in the first sample, she does that.

HOWEVER

I have this custom tag:

<%@ tag body-content="scriptless" import="com.serco.inquire.*" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<%@ attribute name="mgr" required="true" %>
<%@ attribute name="mkind" required="false" %>
<%@ attribute name="sort" required="false" %>

<c:if test="${empty mkind}">
  <c:set var="mkind" value="manager" />
</c:if>

<c:if test="${empty sort}">
  <c:set var="sort" value="none" />
</c:if>

<jsp:useBean id="irc" scope="page" class="com.serco.inquire.IrCollection">
  <jsp:setProperty name="irc" property="mgrtype" value="${mkind}" />
  <jsp:setProperty name="irc" property="sort" value="${sort}" />
  <jsp:setProperty name="irc" property="mgrid" value="${mgr}" />
</jsp:useBean>

${irc.fullsort}

Calling the .jsp file with this:

<c:set var="user" value="none" />    
<c:set var="sort" value="none" />
<inq:displayCollection>
  <jsp:attribute name="mgr">${user}</jsp:attribute>
  <jsp:attribute name="mkind">cotr</jsp:attribute>
  <jsp:attribute name="sort">${sort}</jsp:attribute>
</inq:displayCollection>

In other words, the same exact data are fed to the IrCollection bean. so I should get the same data, right?

Except that I get this:

WHERE cotr = 'none' ORDER BY no DESC

so when Java calls him, he thinks that 'none' is 'none '.
but when jsp calls him, he thinks that "none!" = 'none '.

In order to compare the States of objects, including the content of the strings, use equals(), not is. Him == operator tests if 2 references have the same value, that is, they are both point to the same object (or both are null). The Equals () method does everything what the Director of this class told it to do, but its purpose - and what he does in reasonable implementations - it must compare the States of objects. In the case of the string, it checks if the two String objects contain equal character sequences.

If == happened to return true in your test case, its because the course has led to these two references pointing to the same string object in the constant pool.

Tags: Java

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order by d';

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declare
p_test sys_refcursor;
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select_command('v_sig_devices', '"JOB", "LINE"', '"DEVICE_ID"', 0, 10, p_test);
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But I get the following error:

>
Error report: ORA-00932: inconsistent data types: expected - was -.
ORA-06512: at the 'SIM '. SELECT_COMMAND', line 10
ORA-06512: at line 4 level
00932 00000 - ' incompatible data types: wait %s %s got. "
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At first Oracle gave me an error because the figures were not a string. Can I convert it to a string (with to_char) and Oracle is still not satisfied! Any ideas as to why this is happening?

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Suppose you want sth. as

...
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I'm having a small problem with the error ORA-00932: inconsistent data types. The code below is what I'm working on. The error is on line 12:
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I know what is the error and where it is but I can't work on how to solve this problem. I tried to use to_char on DDH_SCHEMA_NR but that does not.

Anyone have an idea how I can fix this problem?

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DECLARE
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vStmt varchar2 (1000);
Version number (38);
CURSOR c_schemas IS
Select "< SCHEMA-NAME >" as "< scheme name >" twice;
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@';
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@';
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