runtime/org.argeo.slc.core/src/main/java/org/argeo/slc/core/execution/ParameterRef.java

   1 package org.argeo.slc.core.execution;
   2
   3 import org.apache.commons.logging.Log;
   4 import org.apache.commons.logging.LogFactory;
   5 import org.springframework.beans.factory.FactoryBean;
   6
   7 public class ParameterRef implements FactoryBean {
   8         private final static Log log = LogFactory.getLog(ParameterRef.class);
   9
  10         private InstantiationManager instantiationManager;
  11         private String name;
  12
  13         /** Cached object. */
  14         private Object object;
  15
  16         public ParameterRef() {
  17         }
  18
  19         public ParameterRef(String name) {
  20                 this.name = name;
  21         }
  22
  23         public Object getObject() throws Exception {
  24                 if (log.isTraceEnabled())
  25                         log.debug("Parameter ref called for " + name);
  26
  27                 if (object == null)
  28                         object = instantiationManager.getInitializingFlowParameter(name);
  29                 return object;
  30         }
  31
  32         public Class<?> getObjectType() {
  33                 if (object == null)
  34                         return instantiationManager.getInitializingFlowParameterClass(name);
  35                 else
  36                         return object.getClass();
  37         }
  38
  39         public boolean isSingleton() {
  40                 return true;
  41         }
  42
  43         public void setInstantiationManager(
  44                         InstantiationManager instantiationManager) {
  45                 this.instantiationManager = instantiationManager;
  46         }
  47
  48         public void setName(String name) {
  49                 this.name = name;
  50         }
  51
  52 }