/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 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 Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.util;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
public class DoubleKeyedCounter<T, U> implements Serializable {
private HashMap<T, HashMap<U, Integer>> extendedUsageCounter;
public DoubleKeyedCounter() {
extendedUsageCounter = new HashMap<T, HashMap<U, Integer>>();
}
public void increaseCounter( final T t, final U u ) {
HashMap<U, Integer> map = extendedUsageCounter.get( t );
if ( map == null ) {
map = new HashMap<U, Integer>();
extendedUsageCounter.put( t, map );
}
final Integer count = map.get( u );
if ( count == null ) {
map.put( u, 1 );
} else {
map.put( u, count + 1 );
}
}
public int get( final T t, final U u ) {
final HashMap<U, Integer> map = extendedUsageCounter.get( t );
if ( map == null ) {
return 0;
}
final Integer count = map.get( u );
if ( count == null ) {
return 0;
}
return count;
}
public String printStatistic() {
final StringBuilder b = new StringBuilder();
for ( final Map.Entry<T, HashMap<U, Integer>> entry : extendedUsageCounter.entrySet() ) {
final T key = entry.getKey();
b.append( key );
b.append( "\n" );
final HashMap<U, Integer> lmap = entry.getValue();
if ( lmap != null ) {
for ( final Map.Entry<U, Integer> entry2 : lmap.entrySet() ) {
b.append( " " );
b.append( entry2.getKey() );
b.append( " = " );
b.append( entry2.getValue() );
b.append( "\n" );
}
}
}
return b.toString();
}
}