Examples of org.dom4j.util.SingletonStrategy

org.dom4j.util.SingletonStrategy

SingletonStrategy is an interface used to provide common factory access for the same object based on an implementation strategy for singleton. Right now there are two that accompany this interface: SimpleSingleton and PerThreadSingleton. This will replace previous usage of ThreadLocal to allow for alternate strategies.
@author David Lucas @version $Revision: 1.2 $

   * Default namespace prefix -> URI mappings for XPath expressions to use
   */
  private Map xpathNamespaceURIs;


  private static SingletonStrategy createSingleton() {
    SingletonStrategy result = null;


    String documentFactoryClassName;
    try {
      documentFactoryClassName = System.getProperty("org.dom4j.factory",
          "org.dom4j.DocumentFactory");
    } catch (Exception e) {
      documentFactoryClassName = "org.dom4j.DocumentFactory";
    }


    try {
      String singletonClass = System.getProperty(
          "org.dom4j.DocumentFactory.singleton.strategy",
          "org.dom4j.util.SimpleSingleton");
      Class clazz = Class.forName(singletonClass);
      result = (SingletonStrategy) clazz.newInstance();
    } catch (Exception e) {
      result = new SimpleSingleton();
    }


    result.setSingletonClassName(documentFactoryClassName);


    return result;
  }

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    /** Default namespace prefix -> URI mappings for XPath expressions to use */
    private Map xpathNamespaceURIs;


    private static SingletonStrategy createSingleton() {
        SingletonStrategy result = null;
        
        String documentFactoryClassName;
        try {
            documentFactoryClassName = System.getProperty("org.dom4j.factory",
                    "org.dom4j.DocumentFactory");
        } catch (Exception e) {
            documentFactoryClassName = "org.dom4j.DocumentFactory";
        }


        try {
            String singletonClass = System.getProperty(
                    "org.dom4j.DocumentFactory.singleton.strategy",
                    "org.dom4j.util.SimpleSingleton");
            Class clazz = Class.forName(singletonClass);
            result = (SingletonStrategy) clazz.newInstance();
        } catch (Exception e) {
            result = new SimpleSingleton();
        }


        result.setSingletonClassName(documentFactoryClassName);
        
        return result;
    }

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/*     */   protected transient QNameCache cache;
/*     */   private Map xpathNamespaceURIs;
/*     */ 
/*     */   private static SingletonStrategy createSingleton()
/*     */   {
/*  56 */     SingletonStrategy result = null;
/*     */     String documentFactoryClassName;
/*     */     try
/*     */     {
/*  60 */       documentFactoryClassName = System.getProperty("org.dom4j.factory", "org.dom4j.DocumentFactory");
/*     */     }
/*     */     catch (Exception e)
/*     */     {
/*     */       String documentFactoryClassName;
/*  63 */       documentFactoryClassName = "org.dom4j.DocumentFactory";
/*     */     }
/*     */     try
/*     */     {
/*  67 */       String singletonClass = System.getProperty("org.dom4j.DocumentFactory.singleton.strategy", "org.dom4j.util.SimpleSingleton");
/*     */ 
/*  70 */       Class clazz = Class.forName(singletonClass);
/*  71 */       result = (SingletonStrategy)clazz.newInstance();
/*     */     } catch (Exception e) {
/*  73 */       result = new SimpleSingleton();
/*     */     }
/*     */ 
/*  76 */     result.setSingletonClassName(documentFactoryClassName);
/*     */ 
/*  78 */     return result;
/*     */   }

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Related Classes of org.dom4j.util.SingletonStrategy

org.dom4j.DocumentFactory

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