org.springframework.util.SortProperties Maven / Gradle / Ivy

package org.springframework.util;

import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import org.springframework.util.Assert;
import org.springframework.util.comparator.NullSafeComparator;

public class SortProperties extends Properties {
  private static final long serialVersionUID = -8842314902328663478L;

  protected final CharSequence suffix;
  protected final CharSequence prefix;

  public SortProperties(Map map) {
    this(map, "", "");
  }

  public SortProperties(Map map, CharSequence suffix, CharSequence prefix) {
    Assert.notEmpty(map, "'map' must have entries");
    Assert.notNull(this.suffix = suffix, "'suffix' must not be null");
    Assert.notNull(this.prefix = prefix, "'prefix' must not be null");
    putAll(map);
  }

  /**
   * @see java.util.TreeSet#TreeSet(java.util.Collection)
   */
  @Override
  public synchronized Enumeration