Examples of weka.core.StringLocator

weka.core.StringLocator
This class locates and records the indices of String attributes, recursively in case of Relational attributes. The indices are normally used for copying the Strings from one Instances object to another. @author fracpete (fracpete at waikato dot ac dot nz) @version $Revision: 6226 $ @see Attribute#STRING @see Attribute#RELATIONAL

    Instances data = new Instances("Multi-Instance-Dataset", attInfo, 0); 
    data.setClassIndex(data.numAttributes() - 1);


    super.setOutputFormat(data.stringFreeStructure());


    m_BagStringAtts = new StringLocator(data.attribute(1).relation());
    m_BagRelAtts    = new RelationalLocator(data.attribute(1).relation());
    
    return true;
  }

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    newData.insertAttributeAt(classAttribute, newData.numAttributes());
    newData.setClassIndex(newData.numAttributes() - 1);


    super.setOutputFormat(newData.stringFreeStructure());


    m_BagStringAtts = new StringLocator(instanceInfo.attribute(1).relation().stringFreeStructure());
    m_BagRelAtts    = new RelationalLocator(instanceInfo.attribute(1).relation().stringFreeStructure());


    return true;
  }

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   * @param indices    if not null, the indices to which to restrict
   *         the locating
   */
  protected void initInputLocators(Instances data, int[] indices) {
    if (indices == null) {
      m_InputStringAtts = new StringLocator(data);
      m_InputRelAtts    = new RelationalLocator(data);
    }
    else {
      m_InputStringAtts = new StringLocator(data, indices);
      m_InputRelAtts    = new RelationalLocator(data, indices);
    }
  }

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   * @param indices    if not null, the indices to which to restrict
   *         the locating
   */
  protected void initOutputLocators(Instances data, int[] indices) {
    if (indices == null) {
      m_OutputStringAtts = new StringLocator(data);
      m_OutputRelAtts    = new RelationalLocator(data);
    }
    else {
      m_OutputStringAtts = new StringLocator(data, indices);
      m_OutputRelAtts    = new RelationalLocator(data, indices);
    }
  }

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  protected void flushInput() {


    if (    (m_InputStringAtts.getAttributeIndices().length > 0) 
   || (m_InputRelAtts.getAttributeIndices().length > 0) ) {
      m_InputFormat = m_InputFormat.stringFreeStructure();
      m_InputStringAtts = new StringLocator(m_InputFormat, m_InputStringAtts.getAllowedIndices());
    } else {
      // This more efficient than new Instances(m_InputFormat, 0);
      m_InputFormat.delete();
    }
  }

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    if (m_OutputQueue.empty()) {
      // Clear out references to old strings/relationals occasionally
      if (    (m_OutputStringAtts.getAttributeIndices().length > 0)
          || (m_OutputRelAtts.getAttributeIndices().length > 0) ) {
        m_OutputFormat = m_OutputFormat.stringFreeStructure();
        m_OutputStringAtts = new StringLocator(m_OutputFormat, m_OutputStringAtts.getAllowedIndices());
      }
    }
    
    return (numPendingOutput() != 0);
  }

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    Instances data = new Instances("Multi-Instance-Dataset", attInfo, 0); 
    data.setClassIndex(data.numAttributes() - 1);


    super.setOutputFormat(data.stringFreeStructure());


    m_BagStringAtts = new StringLocator(data.attribute(1).relation());
    m_BagRelAtts    = new RelationalLocator(data.attribute(1).relation());
    
    return true;
  }

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    newData.insertAttributeAt(classAttribute, newData.numAttributes());
    newData.setClassIndex(newData.numAttributes() - 1);


    super.setOutputFormat(newData.stringFreeStructure());


    m_BagStringAtts = new StringLocator(instanceInfo.attribute(1).relation().stringFreeStructure());
    m_BagRelAtts    = new RelationalLocator(instanceInfo.attribute(1).relation().stringFreeStructure());


    return true;
  }

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   * @param indices    if not null, the indices to which to restrict
   *         the locating
   */
  protected void initInputLocators(Instances data, int[] indices) {
    if (indices == null) {
      m_InputStringAtts = new StringLocator(data);
      m_InputRelAtts    = new RelationalLocator(data);
    }
    else {
      m_InputStringAtts = new StringLocator(data, indices);
      m_InputRelAtts    = new RelationalLocator(data, indices);
    }
  }

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   * @param indices    if not null, the indices to which to restrict
   *         the locating
   */
  protected void initOutputLocators(Instances data, int[] indices) {
    if (indices == null) {
      m_OutputStringAtts = new StringLocator(data);
      m_OutputRelAtts    = new RelationalLocator(data);
    }
    else {
      m_OutputStringAtts = new StringLocator(data, indices);
      m_OutputRelAtts    = new RelationalLocator(data, indices);
    }
  }

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