/*
 * This file is part of Pebble.
 *
 * Copyright (c) 2014 by Mitchell Bösecke
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
package com.mitchellbosecke.pebble.extension.core;

import com.mitchellbosecke.pebble.extension.Filter;
import com.mitchellbosecke.pebble.template.EvaluationContext;
import com.mitchellbosecke.pebble.template.PebbleTemplate;
import java.util.Collections;
import java.util.List;
import java.util.Map;

/**
 * Sort list items in the reverse order
 *
 * @author Barakat Soror
 */
public class RsortFilter implements Filter {

  @Override
  public List<String> getArgumentNames() {
    return null;
  }

  @SuppressWarnings({"rawtypes", "unchecked"})
  @Override
  public List<Comparable> apply(Object input, Map<String, Object> args, PebbleTemplate self,
      EvaluationContext context, int lineNumber) {
    if (input == null) {
      return null;
    }
    List<Comparable> collection = (List<Comparable>) input;
    collection.sort(Collections.reverseOrder());
    return collection;
  }

}
