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/*******************************************************************************
* Copyright (c) 2006, 2018 IBM Corporation and others.
*
* This program and the accompanying materials are made
* available under the terms of the Eclipse Public License 2.0
* which is available at https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - Jeff Briggs, Henry Hughes, Ryan Morse
*******************************************************************************/
package org.eclipse.linuxtools.systemtap.graphing.core.aggregates;
public class CountAggregate implements IDataAggregate {
/**
* Ensure column isn't empty, then get the count of the column's values.
*
* @param column The column to count.
*
* @return Count of that column's values.
*/
@Override
public Number aggregate(Number[] column) {
if(column == null || column.length == 0) {
return null;
}
int num = 0;
for(int i=0; i<column.length; i++) {
num++;
}
return Integer.valueOf(num);
}
@Override
public String getID() {
return ID;
}
public static final String ID = "org.eclipse.linuxtools.systemtap.graphing.core.aggregates.CountAggregate"; //$NON-NLS-1$
}
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