RapidMiner Integration to NetBeans problem !!

tonio6tonio6 Member Posts: 6 Contributor II
edited November 2018 in Help
Hello to everyone,
I'm using netbeans to create a project in rapidminer. So when i run the project in rapidminer everything seems great, but in netbeans something goes wrong and i dont know what's going on.

Here is the Xml Code on RM:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="5.1.017">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="5.1.017" expanded="true" name="Process">
    <process expanded="true" height="550" width="815">
      <operator activated="true" class="text:process_document_from_file" compatibility="5.1.004" expanded="true" height="76" name="Process Documents from Files" width="90" x="112" y="120">
        <list key="text_directories">
          <parameter key="Positive" value="C:\Users\Antonio\Desktop\desktop\datamining\comments\Positive"/>
          <parameter key="Negative" value="C:\Users\Antonio\Desktop\desktop\datamining\comments\Negative"/>
        </list>
        <process expanded="true" height="594" width="966">
          <operator activated="true" class="text:tokenize" compatibility="5.1.004" expanded="true" height="60" name="Tokenize" width="90" x="124" y="126"/>
          <operator activated="true" class="text:filter_stopwords_english" compatibility="5.1.004" expanded="true" height="60" name="Filter Stopwords (English)" width="90" x="312" y="124"/>
          <operator activated="true" class="text:transform_cases" compatibility="5.1.004" expanded="true" height="60" name="Transform Cases" width="90" x="581" y="120"/>
          <connect from_port="document" to_op="Tokenize" to_port="document"/>
          <connect from_op="Tokenize" from_port="document" to_op="Filter Stopwords (English)" to_port="document"/>
          <connect from_op="Filter Stopwords (English)" from_port="document" to_op="Transform Cases" to_port="document"/>
          <connect from_op="Transform Cases" from_port="document" to_port="document 1"/>
          <portSpacing port="source_document" spacing="0"/>
          <portSpacing port="sink_document 1" spacing="0"/>
          <portSpacing port="sink_document 2" spacing="0"/>
        </process>
      </operator>
      <operator activated="true" class="text:read_document" compatibility="5.1.004" expanded="true" height="60" name="Read Document" width="90" x="112" y="345">
        <parameter key="file" value="C:\Users\Antonio\Desktop\desktop\datamining\comments\positive example.txt"/>
      </operator>
      <operator activated="true" class="x_validation" compatibility="5.1.002" expanded="true" height="112" name="Validation" width="90" x="447" y="75">
        <description>A cross-validation evaluating a decision tree model.</description>
        <parameter key="parallelize_training" value="true"/>
        <parameter key="parallelize_testing" value="true"/>
        <process expanded="true" height="654" width="466">
          <operator activated="true" class="k_nn" compatibility="5.1.017" expanded="true" height="76" name="k-NN" width="90" x="155" y="55"/>
          <connect from_port="training" to_op="k-NN" to_port="training set"/>
          <connect from_op="k-NN" from_port="model" to_port="model"/>
          <portSpacing port="source_training" spacing="0"/>
          <portSpacing port="sink_model" spacing="0"/>
          <portSpacing port="sink_through 1" spacing="0"/>
        </process>
        <process expanded="true" height="654" width="466">
          <operator activated="true" class="apply_model" compatibility="5.1.017" expanded="true" height="76" name="Apply Model" width="90" x="45" y="30">
            <list key="application_parameters"/>
          </operator>
          <operator activated="true" class="performance" compatibility="5.1.017" expanded="true" height="76" name="Performance" width="90" x="179" y="30"/>
          <connect from_port="model" to_op="Apply Model" to_port="model"/>
          <connect from_port="test set" to_op="Apply Model" to_port="unlabelled data"/>
          <connect from_op="Apply Model" from_port="labelled data" to_op="Performance" to_port="labelled data"/>
          <connect from_op="Performance" from_port="performance" to_port="averagable 1"/>
          <portSpacing port="source_model" spacing="0"/>
          <portSpacing port="source_test set" spacing="0"/>
          <portSpacing port="source_through 1" spacing="0"/>
          <portSpacing port="sink_averagable 1" spacing="0"/>
          <portSpacing port="sink_averagable 2" spacing="0"/>
        </process>
      </operator>
      <operator activated="true" class="text:read_document" compatibility="5.1.004" expanded="true" height="60" name="Read Document (2)" width="90" x="112" y="480">
        <parameter key="file" value="C:\Users\Antonio\Desktop\desktop\datamining\comments\negative example.txt"/>
      </operator>
      <operator activated="true" class="text:process_documents" compatibility="5.1.004" expanded="true" height="112" name="Process Documents" width="90" x="313" y="390">
        <parameter key="vector_creation" value="Term Frequency"/>
        <process expanded="true" height="594" width="966">
          <operator activated="true" class="text:tokenize" compatibility="5.1.004" expanded="true" height="60" name="Tokenize (2)" width="90" x="123" y="159"/>
          <operator activated="true" class="text:filter_stopwords_english" compatibility="5.1.004" expanded="true" height="60" name="Filter Stopwords (2)" width="90" x="313" y="165"/>
          <operator activated="true" class="text:transform_cases" compatibility="5.1.004" expanded="true" height="60" name="Transform Cases (2)" width="90" x="446" y="158"/>
          <connect from_port="document" to_op="Tokenize (2)" to_port="document"/>
          <connect from_op="Tokenize (2)" from_port="document" to_op="Filter Stopwords (2)" to_port="document"/>
          <connect from_op="Filter Stopwords (2)" from_port="document" to_op="Transform Cases (2)" to_port="document"/>
          <connect from_op="Transform Cases (2)" from_port="document" to_port="document 1"/>
          <portSpacing port="source_document" spacing="0"/>
          <portSpacing port="sink_document 1" spacing="0"/>
          <portSpacing port="sink_document 2" spacing="0"/>
        </process>
      </operator>
      <operator activated="true" class="apply_model" compatibility="5.1.017" expanded="true" height="76" name="Apply Model (2)" width="90" x="715" y="210">
        <list key="application_parameters"/>
      </operator>
      <connect from_op="Process Documents from Files" from_port="example set" to_op="Validation" to_port="training"/>
      <connect from_op="Read Document" from_port="output" to_op="Process Documents" to_port="documents 1"/>
      <connect from_op="Validation" from_port="model" to_op="Apply Model (2)" to_port="model"/>
      <connect from_op="Validation" from_port="averagable 1" to_port="result 2"/>
      <connect from_op="Read Document (2)" from_port="output" to_op="Process Documents" to_port="documents 2"/>
      <connect from_op="Process Documents" from_port="example set" to_op="Apply Model (2)" to_port="unlabelled data"/>
      <connect from_op="Apply Model (2)" from_port="labelled data" to_port="result 3"/>
      <connect from_op="Apply Model (2)" from_port="model" to_port="result 1"/>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
      <portSpacing port="sink_result 2" spacing="0"/>
      <portSpacing port="sink_result 3" spacing="0"/>
      <portSpacing port="sink_result 4" spacing="0"/>
    </process>
  </operator>
</process>


The Java Code in Netbeans:

import com.rapidminer.RapidMiner;
import com.rapidminer.RapidMiner.ExecutionMode;
import com.rapidminer.operator.IOContainer;
import com.rapidminer.Process;
import com.rapidminer.example.Attribute;
import com.rapidminer.example.Example;
import com.rapidminer.example.ExampleSet;
import com.rapidminer.example.table.ExampleTable;
import com.rapidminer.operator.OperatorException;
import com.rapidminer.tools.XMLException;
import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;

public class RMJava extends javax.swing.JFrame {

    /** Creates new form RMJava */
    public RMJava() {
        initComponents();
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                         
    private void initComponents() {

        jButton1 = new javax.swing.JButton();
        textArea1 = new java.awt.TextArea();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jButton1.setText("Run");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap(352, Short.MAX_VALUE)
                .addComponent(jButton1)
                .addGap(346, 346, 346))
            .addGroup(layout.createSequentialGroup()
                .addGap(76, 76, 76)
                .addComponent(textArea1, javax.swing.GroupLayout.PREFERRED_SIZE, 603, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(70, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addGap(79, 79, 79)
                .addComponent(textArea1, javax.swing.GroupLayout.PREFERRED_SIZE, 368, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 23, Short.MAX_VALUE)
                .addComponent(jButton1)
                .addGap(39, 39, 39))
        );

        pack();
    }// </editor-fold>                       

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                       
        try {
            // TODO add your handling code here:
            RapidMiner.setExecutionMode(ExecutionMode.COMMAND_LINE);
            RapidMiner.init();
            File x=new File("C://Users//Antonio//.RapidMiner5//part1.RMP");
           
            Process process = new  Process(x);
            IOContainer ioResult=process.run();
            ExampleSet resultSet=(ExampleSet)ioResult.getElementAt(0);
            ExampleTable mytable=resultSet.getExampleTable();
            for(int i=0; i<mytable.size()-1; i++)
            {
                Example example=resultSet.getExample(i);
                Attribute predict=example.getAttributes().get("prediction(Play)");
                String resultString=example.getValueAsString(predict);
                //System.out.println(resultString);
                textArea1.setText(textArea1.getText()+"\n"+resultString);
            }
        } catch (OperatorException ex) {
            Logger.getLogger(RMJava.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(RMJava.class.getName()).log(Level.SEVERE, null, ex);
        } catch (XMLException ex) {
            Logger.getLogger(RMJava.class.getName()).log(Level.SEVERE, null, ex);
        }
       
    }                                       

    public static void main(String args[]) {

        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(RMJava.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(RMJava.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(RMJava.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(RMJava.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                new RMJava().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify                   
    private javax.swing.JButton jButton1;
    private java.awt.TextArea textArea1;
    // End of variables declaration                 
}


And i get this the error:

Jan 31, 2012 6:44:11 PM com.rapidminer.Process run
INFO: Process C:\Users\Antonio\.RapidMiner5\part1.RMP finished successfully after 4 s
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: com.rapidminer.operator.learner.lazy.KNNClassificationModel cannot be cast to com.rapidminer.example.ExampleSet
at RMJava.jButton1ActionPerformed(RMJava.java:93)
at RMJava.access$000(RMJava.java:30)
at RMJava$1.actionPerformed(RMJava.java:54)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6505)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2713)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:707)
at java.awt.EventQueue.access$000(EventQueue.java:101)
at java.awt.EventQueue$3.run(EventQueue.java:666)
at java.awt.EventQueue$3.run(EventQueue.java:664)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:680)
at java.awt.EventQueue$4.run(EventQueue.java:678)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:677)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)


I can't figure out why k-NN classification model cannot be cast? Any help is much appreciated...thanks!!!  :)
Tagged:

Answers

  • MariusHelfMariusHelf RapidMiner Certified Expert, Member Posts: 1,869   Unicorn
    Hi,

    the stack trace contains all the information you need to solve the problem. It says that you are trying to cast a KNNClassificationModel to an ExampleSet in function RMJava.jButton1ActionPerformed in line 93 of RMJava.java. There it reads:
    ExampleSet resultSet=(ExampleSet)ioResult.getElementAt(0);
    That means that you are getting the zero-th (i.e. the first) output of the process and try to cast it to an ExampleSet. But if you look at your process you will see that to the first result output the Model-output of Apply Model is connected. Either adjust the connections in the process, or call getElementAt(2) instead, since to that port the labelled example set is connected.

    Best,
    Marius
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