/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* AddID.java
* Copyright (C) 2005 University of Waikato, Hamilton, New Zealand
*/
package weka.filters.unsupervised.attribute;
import weka.core.Attribute;
import weka.core.Capabilities;
import weka.core.Instance;
import weka.core.DenseInstance;
import weka.core.Instances;
import weka.core.Option;
import weka.core.OptionHandler;
import weka.core.RevisionUtils;
import weka.core.SingleIndex;
import weka.core.Utils;
import weka.core.Capabilities.Capability;
import weka.filters.Filter;
import weka.filters.UnsupervisedFilter;
import java.util.Enumeration;
import java.util.Vector;
/**
<!-- globalinfo-start -->
* An instance filter that adds an ID attribute to the dataset. The new attribute contains a unique ID for each instance.<br/>
* Note: The ID is not reset for the second batch of files (using -b and -r and -s).
* <p/>
<!-- globalinfo-end -->
*
<!-- options-start -->
* Valid options are: <p/>
*
* <pre> -C <index>
* Specify where to insert the ID. First and last
* are valid indexes.(default first)</pre>
*
* <pre> -N <name>
* Name of the new attribute.
* (default = 'ID')</pre>
*
<!-- options-end -->
*
* @author fracpete (fracpete at waikato dot ac dot nz)
* @version $Revision: 5987 $
*/
public class AddID
extends Filter
implements UnsupervisedFilter, OptionHandler {
/** for serialization */
static final long serialVersionUID = 4734383199819293390L;
/** the index of the attribute */
protected SingleIndex m_Index = new SingleIndex("first");
/** the name of the attribute */
protected String m_Name = "ID";
/** the counter for the ID */
protected int m_Counter = -1;
/**
* Returns a string describing this filter
*
* @return a description of the filter suitable for
* displaying in the explorer/experimenter gui
*/
public String globalInfo() {
return
"An instance filter that adds an ID attribute to the dataset. "
+ "The new attribute contains a unique ID for each instance.\n"
+ "Note: The ID is not reset for the second batch of files (using -b "
+ "and -r and -s).";
}
/**
* Returns an enumeration describing the available options.
*
* @return an enumeration of all the available options.
*/
public Enumeration listOptions() {
Vector result = new Vector();
result.addElement(new Option(
"\tSpecify where to insert the ID. First and last\n"
+"\tare valid indexes.(default first)",
"C", 1, "-C <index>"));
result.addElement(new Option(
"\tName of the new attribute.\n"
+"\t(default = 'ID')",
"N", 1,"-N <name>"));
return result.elements();
}
/**
* Parses a given list of options. <p/>
*
<!-- options-start -->
* Valid options are: <p/>
*
* <pre> -C <index>
* Specify where to insert the ID. First and last
* are valid indexes.(default first)</pre>
*
* <pre> -N <name>
* Name of the new attribute.
* (default = 'ID')</pre>
*
<!-- options-end -->
*
* @param options the list of options as an array of strings
* @throws Exception if an option is not supported
*/
public void setOptions(String[] options) throws Exception {
String tmpStr;
tmpStr = Utils.getOption('C', options);
if (tmpStr.length() != 0)
m_Index.setSingleIndex(tmpStr);
else
m_Index.setSingleIndex("first");
tmpStr = Utils.getOption('N', options);
if (tmpStr.length() != 0)
m_Name = tmpStr;
else
m_Name = "ID";
if (getInputFormat() != null)
setInputFormat(getInputFormat());
}
/**
* Gets the current settings of the filter.
*
* @return an array of strings suitable for passing to setOptions
*/
public String[] getOptions() {
Vector result;
result = new Vector();
result.add("-C");
result.add(getIDIndex());
result.add("-N");
result.add(getAttributeName());
return (String[]) result.toArray(new String[result.size()]);
}
/**
* Returns the tip text for this property
*
* @return tip text for this property suitable for
* displaying in the explorer/experimenter gui
*/
public String attributeNameTipText() {
return "Set the new attribute's name.";
}
/**
* Get the name of the attribute to be created
*
* @return the current attribute name
*/
public String getAttributeName() {
return m_Name;
}
/**
* Set the new attribute's name
*
* @param value the new name
*/
public void setAttributeName(String value) {
m_Name = value;
}
/**
* Returns the tip text for this property
*
* @return tip text for this property suitable for
* displaying in the explorer/experimenter gui
*/
public String IDIndexTipText() {
return
"The position (starting from 1) where the attribute will be inserted "
+ "(first and last are valid indices).";
}
/**
* Get the index of the attribute used.
*
* @return the index of the attribute
*/
public String getIDIndex() {
return m_Index.getSingleIndex();
}
/**
* Sets index of the attribute used.
*
* @param value the index of the attribute
*/
public void setIDIndex(String value) {
m_Index.setSingleIndex(value);
}
/**
* Returns the Capabilities of this filter.
*
* @return the capabilities of this object
* @see Capabilities
*/
public Capabilities getCapabilities() {
Capabilities result = super.getCapabilities();
result.disableAll();
// attributes
result.enableAllAttributes();
result.enable(Capability.MISSING_VALUES);
// class
result.enableAllClasses();
result.enable(Capability.MISSING_CLASS_VALUES);
result.enable(Capability.NO_CLASS);
return result;
}
/**
* Sets the format of the input instances.
*
* @param instanceInfo an Instances object containing the input instance
* structure (any instances contained in the object are ignored - only the
* structure is required).
* @return true if the outputFormat may be collected immediately
* @throws Exception if the format couldn't be set successfully
*/
public boolean setInputFormat(Instances instanceInfo) throws Exception {
Instances outputFormat;
Attribute newAttribute;
super.setInputFormat(instanceInfo);
m_Counter = -1;
m_Index.setUpper(instanceInfo.numAttributes());
outputFormat = new Instances(instanceInfo, 0);
newAttribute = new Attribute(m_Name);
if ((m_Index.getIndex() < 0) ||
(m_Index.getIndex() > getInputFormat().numAttributes()))
throw new IllegalArgumentException("Index out of range");
outputFormat.insertAttributeAt(newAttribute, m_Index.getIndex());
setOutputFormat(outputFormat);
return true;
}
/**
* Input an instance for filtering. Filter requires all
* training instances be read before producing output.
*
* @param instance the input instance
* @return true if the filtered instance may now be
* collected with output().
* @throws IllegalStateException if no input format has been set.
*/
public boolean input(Instance instance) {
if (getInputFormat() == null)
throw new IllegalStateException("No input instance format defined");
if (m_NewBatch) {
resetQueue();
m_NewBatch = false;
}
if (!isFirstBatchDone()) {
bufferInput(instance);
return false;
}
else {
convertInstance(instance);
return true;
}
}
/**
* Signify that this batch of input to the filter is finished.
* If the filter requires all instances prior to filtering,
* output() may now be called to retrieve the filtered instances.
*
* @return true if there are instances pending output
* @throws IllegalStateException if no input structure has been defined
*/
public boolean batchFinished() {
if (getInputFormat() == null)
throw new IllegalStateException("No input instance format defined");
if (!isFirstBatchDone()) {
m_Counter = 0;
// Convert pending input instances
for (int i = 0; i < getInputFormat().numInstances(); i++)
convertInstance(getInputFormat().instance(i));
}
// Free memory
flushInput();
m_NewBatch = true;
m_FirstBatchDone = true;
return (numPendingOutput() != 0);
}
/**
* Convert a single instance over. The converted instance is
* added to the end of the output queue.
*
* @param instance the instance to convert
*/
protected void convertInstance(Instance instance) {
Instance inst;
m_Counter++;
// build instance
try {
inst = (Instance)instance.copy();
// First copy string values from input to output
copyValues(inst, true, inst.dataset(), getOutputFormat());
// Insert the new attribute and reassign to output
inst.setDataset(null);
inst.insertAttributeAt(m_Index.getIndex());
inst.setValue(m_Index.getIndex(), m_Counter);
inst.setDataset(getOutputFormat());
push(inst);
}
catch (Exception e) {
e.printStackTrace();
}
}
/**
* Returns the revision string.
*
* @return the revision
*/
public String getRevision() {
return RevisionUtils.extract("$Revision: 5987 $");
}
/**
* Main method for testing this class.
*
* @param args should contain arguments to the filter: use -h for help
*/
public static void main(String[] args) {
runFilter(new AddID(), args);
}
}