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/*******************************************************************************
* Copyright (c) 2006 IBM Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - Jeff Briggs, Henry Hughes, Ryan Morse
*******************************************************************************/
package org.eclipse.linuxtools.systemtap.graphingapi.core.filters;
import java.util.ArrayList;
import org.eclipse.linuxtools.systemtap.graphingapi.core.structures.NumberType;
import org.eclipse.linuxtools.systemtap.structures.Copier;
import org.eclipse.linuxtools.systemtap.structures.IndexedObject;
import org.eclipse.linuxtools.systemtap.structures.Sort;
public class SortFilter implements IDataSetFilter {
public SortFilter(int column, int ordering) {
this.column = column;
this.style = (ordering==ASCENDING ? ASCENDING : DESCENDING);
}
/**
* Apply the RangeFilter to the passed dataset.
*
* @param data The dataset to filter.
*
* @return The filtered dataset.
*/
@Override
public ArrayList<Object>[] filter(ArrayList<Object>[] data) {
if(column < 0 || column >= data.length)
return null;
ArrayList<Object>[] newData = Copier.copy(data);
IndexedObject[] items = new IndexedObject[newData[0].size()];
try {
for(int i=0; i<newData[column].size(); i++)
items[i] = new IndexedObject(i, NumberType.cleanObj2Num(newData[column].get(i)));
} catch(NumberFormatException nfe) {
for(int i=0; i<newData[column].size(); i++)
items[i] = new IndexedObject(i, newData[column].get(i));
}
Sort.quicksort(items, 0, items.length-1);
for(int j, i=0; i<newData.length; i++) {
for(j=0; j<items.length; j++) {
if(DESCENDING == style)
newData[i].add(newData[i].get(items[items.length-j-1].index));
else
newData[i].add(newData[i].get(items[j].index));
}
for(j=0; j<items.length; j++)
newData[i].remove(0);
}
return newData;
}
@Override
public String getID() {
return ID;
}
private int column;
private int style;
public static final int ASCENDING = 0;
public static final int DESCENDING = 1;
public static final String ID = "org.eclipse.linuxtools.systemtap.graphingapi.core.filters.SortFilter"; //$NON-NLS-1$
}
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