runtime/org.argeo.slc.support.ant/src/main/java/org/argeo/slc/ant/spring/OverrideArg.java

   1 package org.argeo.slc.ant.spring;
   2
   3 import java.util.List;
   4 import java.util.Map;
   5
   6 import org.apache.commons.logging.Log;
   7 import org.apache.commons.logging.LogFactory;
   8 import org.apache.tools.ant.BuildException;
   9
  10 /** Ant type allowing to override bean properties. */
  11 public class OverrideArg extends SpringArg<Object> {
  12         private final static Log log = LogFactory.getLog(OverrideArg.class);
  13
  14         private String name;
  15         private Object value;
  16         private ListArg overrideList;
  17         private MapArg overrideMap;
  18
  19         private Boolean merge = false;
  20
  21         /** The name of the property to override. */
  22         public String getName() {
  23                 return name;
  24         }
  25
  26         /** Sets the name. */
  27         public void setName(String name) {
  28                 this.name = name;
  29         }
  30
  31         /** Both value and bean cannot be set. */
  32         public void setValue(String value) {
  33                 checkValueAlreadySet();
  34                 this.value = value;
  35         }
  36
  37         @Override
  38         public void setBean(String bean) {
  39                 checkValueAlreadySet();
  40                 super.setBean(bean);
  41         }
  42
  43         /** Creates override list sub tag. */
  44         public ListArg createList() {
  45                 checkValueAlreadySet();
  46                 overrideList = new ListArg();
  47                 return overrideList;
  48         }
  49
  50         public MapArg createMap() {
  51                 checkValueAlreadySet();
  52                 overrideMap = new MapArg();
  53                 return overrideMap;
  54         }
  55
  56         /**
  57          * The related object: the value if a value had been set or an instance of
  58          * the bean if not.
  59          */
  60         public Object getObject() {
  61                 if (value != null) {
  62                         if (log.isTraceEnabled())
  63                                 log.trace(this + "\t: Returns override object as value");
  64                         return value;
  65                 } else if (getBean() != null
  66                                 || getAntref() != null
  67                                 // works on original if no collection is defined
  68                                 || (getOriginal() != null && overrideList == null && overrideMap == null)) {
  69                         if (log.isTraceEnabled())
  70                                 log.trace(this + "\t: Returns override object as instance");
  71                         return getInstance();
  72                 } else if (overrideList != null) {
  73                         if (log.isTraceEnabled())
  74                                 log.trace(this + "\t: Returns override object as list");
  75                         return overrideList.getAsObjectList((List<Object>) getOriginal());
  76                 } else if (overrideMap != null) {
  77                         if (log.isTraceEnabled())
  78                                 log.trace(this + "\t: Returns override object as map");
  79                         return overrideMap
  80                                         .getAsObjectMap((Map<String, Object>) getOriginal());
  81                 } else {
  82                         throw new BuildException("Value or bean not set.");
  83                 }
  84         }
  85
  86         protected void checkValueAlreadySet() {
  87                 super.checkValueAlreadySet();
  88                 if (value != null || overrideList != null || overrideMap != null) {
  89                         if (!getMerge()) {
  90                                 throw new BuildException("Value already set.");
  91                         }
  92                 }
  93         }
  94
  95         public Boolean getMerge() {
  96                 return merge;
  97         }
  98
  99         public void setMerge(Boolean merge) {
 100                 this.merge = merge;
 101         }
 102
 103 }