public static void setProperty()

in src/main/java/org/apache/bsf/util/ReflectionUtils.java [475:538]
55 lines of code
10 McCabe index (conditional complexity)

  public static void setProperty (final Object target, final String propName,
                  final Integer index, final Object value,
                  final Class valueType, final TypeConvertorRegistry tcr)
       throws IntrospectionException, IllegalArgumentException,
              IllegalAccessException, InvocationTargetException {
    // find the property descriptor
    final BeanInfo bi = Introspector.getBeanInfo (target.getClass ());
    final PropertyDescriptor pd = (PropertyDescriptor)
      findFeatureByName ("property", propName, bi.getPropertyDescriptors ());
    if (pd == null) {
      throw new IllegalArgumentException ("property '" + propName + "' is " +
                          "unknown for '" + target + "'");
    }

    // get write method and type of property
    Method wm;
    Class propType;
    if (index != null) {
      // if index != null, then property is indexed - pd better be so too
      if (!(pd instanceof IndexedPropertyDescriptor)) {
        throw new IllegalArgumentException ("attempt to set non-indexed " +
                            "property '" + propName +
                                            "' as being indexed");
      }
      final IndexedPropertyDescriptor ipd = (IndexedPropertyDescriptor) pd;
      wm = ipd.getIndexedWriteMethod ();
      propType = ipd.getIndexedPropertyType ();
    } else {
      wm = pd.getWriteMethod ();
      propType = pd.getPropertyType ();
    }

    if (wm == null) {
      throw new IllegalArgumentException ("property '" + propName +
                          "' is not writeable");
    }

    // type convert the value if necessary
    Object propVal = null;
    boolean okeydokey = true;
    if (propType.isAssignableFrom (valueType)) {
      propVal = value;
    } else if (tcr != null) {
      final TypeConvertor cvtor = tcr.lookup (valueType, propType);
      if (cvtor != null) {
        propVal = cvtor.convert (valueType, propType, value);
      } else {
        okeydokey = false;
      }
    } else {
      okeydokey = false;
    }
    if (!okeydokey) {
      throw new IllegalArgumentException ("unable to assign '" + value +
                          "' to property '" + propName + "'");
    }

    // now set the value
    if (index != null) {
      wm.invoke (target, new Object[] {index, propVal});
    } else {
      wm.invoke (target, new Object[] {propVal});
    }
  }