/**
* Copyright (C) 2010-2017 Gordon Fraser, Andrea Arcuri and EvoSuite
* contributors
*
* This file is part of EvoSuite.
*
* EvoSuite is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3.0 of the License, or
* (at your option) any later version.
*
* EvoSuite 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 Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with EvoSuite. If not, see <http://www.gnu.org/licenses/>.
*/
/**
*
*/
package org.evosuite.utils;
import java.util.ArrayDeque;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Queue;
import java.util.Set;
import org.evosuite.Properties;
/**
* @author Gordon Fraser
*
*/
public class DefaultRandomAccessQueue<T> implements RandomAccessQueue<T> {
private final Set<T> valueSet = new HashSet<T>();
private final Queue<T> queue = new ArrayDeque<T>();
/* (non-Javadoc)
* @see org.evosuite.primitives.RandomAccessQueue#restrictedAdd(java.lang.Object)
*/
@Override
public void restrictedAdd(T value) {
if (!valueSet.contains(value)) {
queue.add(value);
valueSet.add(value);
reduceSize();
}
}
private void reduceSize() {
if (queue.size() > Properties.DYNAMIC_POOL_SIZE) {
T value = queue.poll();
valueSet.remove(value);
}
}
/* (non-Javadoc)
* @see org.evosuite.primitives.RandomAccessQueue#getRandomValue()
*/
@Override
public T getRandomValue() {
return Randomness.choice(valueSet);
}
@Override
public String toString() {
String res = new String("[ ");
Iterator<T> itr = queue.iterator();
while(itr.hasNext()) {
Object element = itr.next();
res += element + " ";
}
res += "]";
return res;
}
}