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The core XML data binding framework with support for marshalling Java objects to and unmarshalling from XML documents.
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/*
 * Copyright 2005 Ralf Joachim
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package org.castor.mapping;

import java.io.Serializable;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

/**
 * @author Ralf Joachim
 * @version $Revision: 5951 $ $Date: 2006-04-25 16:09:10 -0600 (Tue, 25 Apr 2006) $
 */
public final class BindingType implements Cloneable, Comparable, Serializable {
  // ------------------------------------------------------------------------

  /** SerialVersionUID */
  private static final long serialVersionUID = -2116844968191798202L;

  private static final Map TYPES = new HashMap<>();

  public static final BindingType JDO = new BindingType("jdo");
  public static final BindingType XML = new BindingType("xml");

  private final String _type;

  // ------------------------------------------------------------------------

  private BindingType(final String kind) {
    _type = kind;
    TYPES.put(kind, this);
  }

  public static BindingType valueOf(final String kind) {
    return (BindingType) TYPES.get(kind);
  }

  public static Iterator iterator() {
    return TYPES.values().iterator();
  }

  // ------------------------------------------------------------------------

  /**
   * Returns the String representation of this kind.
   *
   * @return String representation of this kind.
   */
  public String toString() {
    return _type;
  }

  /**
   * Clone only returns the one and only instance of this kind.
   *
   * @return The original instance.
   */
  public Object clone() {
    return this;
  }

  /**
   * Returns if the specified object and this are one and the same instance.
   *
   * @param other Object to be compared with this instance.
   * @return true if other equals this else false.
   */
  public boolean equals(final Object other) {
    return (this == other);
  }

  /**
   * Returns the hash code of this object.
   *
   * @return Hash code of this object.
   */
  public int hashCode() {
    return _type.hashCode();
  }

  /**
   * Compares {@link #_type} against {@link #_type} of the specified object. So this method is
   * inconsistent with {@link #equals}.
   *
   * @param other Object to be compared with this instance.
   * @return A negative integer, zero, or a positive integer as this object is less than, equal to,
   *         or greater than the specified object.
   */
  public int compareTo(final BindingType other) {
    return _type.compareTo(other._type);
  }

  /**
   * Called during deserialization.
   *
   * @return The existing instance of the enum. 

   *         So you can use '==' like 'equals' even if you use a deserialized Enum.
   */
  protected Object readResolve() {
    return TYPES.get(_type);
  }

  // ------------------------------------------------------------------------
}