org.argeo.slc/src/main/java/org/argeo/slc/ant/spring/AbstractSpringArg.java

   1 package org.argeo.slc.ant.spring;
   2
   3 import java.util.List;
   4 import java.util.Vector;
   5
   6 import org.springframework.beans.BeanWrapper;
   7 import org.springframework.beans.BeanWrapperImpl;
   8 import org.springframework.context.ApplicationContext;
   9
  10 import org.apache.tools.ant.types.DataType;
  11
  12 import org.argeo.slc.ant.SlcProjectHelper;
  13
  14 /** Abstract Ant type wrapping a Spring bean. */
  15 public abstract class AbstractSpringArg extends DataType {
  16         private List<OverrideArg> overrides = new Vector<OverrideArg>();
  17
  18         private String bean;
  19
  20         // cache bean instance to avoid reading it twice if it is a prototype
  21         private Object beanInstance = null;
  22
  23         /** The <u>name</u> of the underlying bean, as set throught the attribute. */
  24         public String getBean() {
  25                 return bean;
  26         }
  27
  28         /** Setter for the bean name. */
  29         public void setBean(String bean) {
  30                 this.bean = bean;
  31         }
  32
  33         /**
  34          * Retrieve the instance of the bean, and sets the overriden properties.
  35          * <b>The value is cached.</b>
  36          */
  37         public Object getBeanInstance() {
  38                 if (beanInstance == null) {
  39                         beanInstance = getContext().getBean(bean);
  40
  41                         BeanWrapper wrapper = new BeanWrapperImpl(beanInstance);
  42                         for (OverrideArg override : overrides) {
  43                                 wrapper.setPropertyValue(override.getName(), override
  44                                                 .getObject());
  45                         }
  46                 }
  47                 return beanInstance;
  48         }
  49
  50         /** Creates an override subtag. */
  51         public OverrideArg createOverride() {
  52                 OverrideArg propertyArg = new OverrideArg();
  53                 overrides.add(propertyArg);
  54                 return propertyArg;
  55         }
  56
  57         /** The related Spring application context. */
  58         protected ApplicationContext getContext() {
  59                 return (ApplicationContext) getProject().getReference(
  60                                 SlcProjectHelper.REF_ROOT_CONTEXT);
  61         }
  62
  63 }