"Problem with using advanced_file_connectors:read_sparse in Java Application"

darekg11

Hi, I am using RapidMiner 6.5 with 1 year Academia license.

In my process I'm using Read Sparse Operator, here is my Process after exporting to XML:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="6.5.002">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="6.5.002" expanded="true" name="Process">
    <parameter key="logverbosity" value="init"/>
    <parameter key="random_seed" value="2001"/>
    <parameter key="send_mail" value="never"/>
    <parameter key="notification_email" value=""/>
    <parameter key="process_duration_for_mail" value="30"/>
    <parameter key="encoding" value="SYSTEM"/>
    <parameter key="parallelize_main_process" value="false"/>
    <process expanded="true">
      <operator activated="true" class="advanced_file_connectors:read_sparse" compatibility="6.5.002" expanded="true" height="60" name="Read Sparse" width="90" x="45" y="210">
        <parameter key="format" value="no_label"/>
        <parameter key="data_file" value="C:\Users\Kąputereg\Desktop\PROJEKT - RAPIDMINER\counted_2000_no_label.txt"/>
        <parameter key="dimension" value="18635"/>
        <parameter key="sample_size" value="-1"/>
        <parameter key="use_quotes" value="true"/>
        <parameter key="quotes_character" value="&quot;"/>
        <parameter key="datamanagement" value="double_sparse_array"/>
        <parameter key="decimal_point_character" value="."/>
        <list key="prefix_map"/>
        <parameter key="encoding" value="SYSTEM"/>
      </operator>
      <operator activated="true" class="retrieve" compatibility="6.5.002" expanded="true" height="60" name="Retrieve 200k_SVM_Linear_C_0" width="90" x="45" y="75">
        <parameter key="repository_entry" value="//Local Repository/data/Models/200k_SVM_Linear_C_0"/>
      </operator>
      <operator activated="true" class="apply_model" compatibility="6.5.002" expanded="true" height="76" name="Apply Model" width="90" x="246" y="120">
        <list key="application_parameters"/>
        <parameter key="create_view" value="false"/>
      </operator>
      <connect from_op="Read Sparse" from_port="output" to_op="Apply Model" to_port="unlabelled data"/>
      <connect from_op="Retrieve 200k_SVM_Linear_C_0" from_port="output" to_op="Apply Model" to_port="model"/>
      <connect from_op="Apply Model" from_port="labelled data" 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"/>
    </process>
  </operator>
</process>

Now when I want to load it to my java application I get following error:

INFO: <em class="error">The operator class 'advanced_file_connectors:read_sparse' is unknown. Possibly you must install a plugin for operators of group 'advanced_file_connectors'.</em>

And my code:

public RapidMinerClassification(String pathToProcess) throws IOException, XMLException
	{
		System.setProperty("rapidminer.home", "C:\\Users\\Kąputereg\\.RapidMiner");
		RapidMiner.setExecutionMode(RapidMiner.ExecutionMode.COMMAND_LINE);
	    RapidMiner.init();
	    _rapidMinerProcess = new Process(new File(pathToProcess));
		_readSparseOperator = _rapidMinerProcess.getOperator("Read Sparse");
	}

	public List<ClassificationResult> PredictSentimentalValue(String pathToCountedSparseFile) throws OperatorException
	{
		_readSparseOperator.setParameter(SparseFormatExampleSource.PARAMETER_DATA_FILE, pathToCountedSparseFile);
		_rapidMinerProcess.run();
		return null;
	}

I think it may be related to fact that Read Sparse comes from Academia Lincese but I set right path to my RapidMiner home directory as indicated by:

INFO: rapidminer.home is 'C:\Users\Kąputereg\.RapidMiner'. Dec 25, 2015 5:56:08 PM com.rapidminer.core.license.ProductConstraintManager initialize INFO: Initializing license manager. Dec 25, 2015 5:56:08 PM com.rapidminer.core.license.ProductConstraintManager initialize INFO: Using default license location. Dec 25, 2015 5:56:08 PM com.rapidminer.core.license.ProductConstraintManager initialize INFO: License folder in RapidMiner Studio installation folder found. Also loading licenses from there.

Any help would be appreciated.


EDIT: Fixed, for any future people with similar problem:

In Your RapidMiner Home directory create additional directory: lib\\plugins and copy all neccessery files there.