org.opennms.netmgt.jasper.analytics.OutlierFilter.java Source code

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Here is the source code for org.opennms.netmgt.jasper.analytics.OutlierFilter.java

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 * OpenNMS(R) is Copyright (C) 1999-2015 The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is free software: you can redistribute it and/or modify
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package org.opennms.netmgt.jasper.analytics;

import java.util.Map;

import org.opennms.netmgt.integrations.R.RScriptException;
import org.opennms.netmgt.integrations.R.RScriptExecutor;
import org.opennms.netmgt.integrations.R.RScriptInput;
import org.opennms.netmgt.integrations.R.RScriptOutput;

import com.google.common.collect.ImmutableTable;
import com.google.common.collect.Maps;
import com.google.common.collect.RowSortedTable;

/**
 * Performs outlier removal and interpolation using R.
 *
 * @see {@link org.opennms.netmgt.jasper.analytics.OutlierFilterConfig}
 * @author jwhite
 */
public class OutlierFilter implements Filter {
    private static final String PATH_TO_R_SCRIPT = "/org/opennms/netmgt/jasper/analytics/outlierFilter.R";
    private final OutlierFilterConfig m_config;

    public OutlierFilter(OutlierFilterConfig config) {
        m_config = config;
    }

    @Override
    public void filter(RowSortedTable<Integer, String, Double> dsAsTable) throws RScriptException {
        String columnToFilter = m_config.getInputColumn();

        Map<String, Object> arguments = Maps.newHashMap();
        arguments.put("columnToFilter", columnToFilter);
        arguments.put("probability", m_config.getProbability());

        RScriptExecutor executor = new RScriptExecutor();
        RScriptOutput output = executor.exec(PATH_TO_R_SCRIPT, new RScriptInput(dsAsTable, arguments));
        ImmutableTable<Integer, String, Double> outputTable = output.getTable();

        // Replace all of the values in the given column with those returned
        // by the script
        int numRowsInTable = dsAsTable.rowKeySet().size();
        for (int i = 0; i < numRowsInTable; i++) {
            dsAsTable.put(i, columnToFilter, outputTable.get(i, columnToFilter));
        }
    }
}