relationscache.java

数据仓库工具

/*
  Loader - tool for transfering data from one JDBC source to another and
  doing transformations during copy.
    Copyright (C) 2002-2003  Together
    This library 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 2.1 of the License, or (at your option) any later version.
    This library 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 General Public License for more details.
    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 Loader.java
 Date: 03.03.2003.
 @version 2.1 alpha
 @authors:
 Radoslav Dutina  [e-mail]
 */

package org.webdocwf.util.loader;

import java.util.*;

/**
 * RelationsCache class is used for caching value of relation column if the tableMode
 * is Cache in <table> tag of impordDefinition job
 * @author not Radoslav Dutina
 * @version 1.0
 */
public class RelationsCache {

  private Hashtable relationCacheValue = new Hashtable();
  private Hashtable relationCacheType = new Hashtable();

  /**
   * Empty constructor of RelationsCache class
   */
  public RelationsCache() {
  }

  /**
   * This method sets the value of relationCacheValue hashtable
   * @param key is string which reperesents sql statement
   * @param obj is value of this sql statement
   */
  public void setRelationsCacheValue(String key, Object obj){
   relationCacheValue.put(key,obj);
 }

 /**
  * This method sets the value of relationCacheType hashtable
  * @param key is string which reperesents sql statement
  * @param type is value of this sql statement
  */
 public void setRelationsCacheType(String key, String type){
   relationCacheType.put(key,type);
 }

 /**
  * This method read value from relationCacheValue hashtable
  * @param key is string which reperesents sql statement
  * @return value from hashtable
  */
 public Object getRelationsCacheValue(String key) {
    Object obj = relationCacheValue.get(key);
    if (obj == null)
      return null;
    else
      return obj;
  }

  /**
  * This method read value from relationCacheType hashtable
  * @param key is string which reperesents sql statement
  * @return value from hashtable
   */
  public String getRelationsCachType(String key){
    String type=relationCacheType.get(key).toString();
    return type;
  }

  /**
   * This method empty all values of hashtables:
   * relationCacheValue and relationCacheType
   */
  public void resetRelationsCache(){
    relationCacheValue.clear();
    relationCacheType.clear();
  }

}