copyable.java~4~

来自「数据挖掘中常常会遇到apriori算法 这是apriori算法的java版」· JAVA~4~ 代码 · 共 32 行

package apriori;
/**
 * Interface implemented by classes that can produce "shallow" copies
 * of their objects. (As opposed to clone(), which is supposed to
 * produce a "deep" copy.)
 *
 * public Object clone()
 * Makes a copy of this CertStoreParameters.
 * The precise meaning of "copy" may depend on the class of the CertStoreParameters object.
 * A typical implementation performs a "deep copy" of this object,
 * but this is not an absolute requirement.
 * Some implementations may perform a "shallow copy" of some or all of the fields of this object.
 * Note that the CertStore.getInstance methods make a copy of the specified CertStoreParameters.
 * A deep copy implementation of clone is safer and more robust,
 * as it prevents the caller from corrupting a shared CertStore
 * by subsequently modifying the contents of its initialization parameters.
 * However, a shallow copy implementation of clone is more appropriate for applications
 * that need to hold a reference to a parameter contained in the CertStoreParameters.
 * For example, a shallow copy clone allows an application to release the resources of a particular
 *  CertStore initialization parameter immediately,
 * rather than waiting for the garbage collection mechanism.
 * This should be done with the utmost care, since the CertStore may still be in use by other threads
 */
public interface Copyable {
/**
   * This method produces a shallow copy of an object.
   * It does the same as the clone() method in Object, which also produces
   * a shallow copy.
   */
  public Object copy();
}