示例#1
0
  /**
   * Examines a property's type to see which method should be used to parse the property's value.
   *
   * @param desc The description of the property
   * @param element The XML element containing the property value
   * @return The value stored in the element
   * @throws IOException If there is an error reading the document
   */
  public Object getObjectValue(PropertyDescriptor desc, Element element) throws IOException {
    // Find out what kind of property it is
    Class type = desc.getPropertyType();

    // If it's an array, get the base type
    if (type.isArray()) {
      type = type.getComponentType();
    }

    // For native types, object wrappers for natives, and strings, use the
    // basic parse routine
    if (type.equals(Integer.TYPE)
        || type.equals(Long.TYPE)
        || type.equals(Short.TYPE)
        || type.equals(Byte.TYPE)
        || type.equals(Boolean.TYPE)
        || type.equals(Float.TYPE)
        || type.equals(Double.TYPE)
        || Integer.class.isAssignableFrom(type)
        || Long.class.isAssignableFrom(type)
        || Short.class.isAssignableFrom(type)
        || Byte.class.isAssignableFrom(type)
        || Boolean.class.isAssignableFrom(type)
        || Float.class.isAssignableFrom(type)
        || Double.class.isAssignableFrom(type)
        || String.class.isAssignableFrom(type)) {
      return readBasicType(type, element);
    } else if (java.util.Date.class.isAssignableFrom(type)) {
      // If it's a date, use the date parser
      return readDate(element);
    } else {
      try {
        // If it's an object, create a new instance of the object (it should
        // be a bean, or there will be trouble)
        Object newOb = type.newInstance();

        // Copy the XML element into the bean
        readObject(newOb, element);

        return newOb;
      } catch (InstantiationException exc) {
        throw new IOException(
            "Error creating object for " + desc.getName() + ": " + exc.toString());
      } catch (IllegalAccessException exc) {
        throw new IOException(
            "Error creating object for " + desc.getName() + ": " + exc.toString());
      }
    }
  }
示例#2
0
  /**
   * Reads XML element(s) into an indexed bean property by first locating the XML element(s)
   * corresponding to this property.
   *
   * @param ob The bean whose property is being set
   * @param desc The property that will be set
   * @param nodes The list of XML items that may contain the property
   * @throws IOException If there is an error reading the document
   */
  public void readIndexedProperty(
      Object ob, IndexedPropertyDescriptor desc, NodeList nodes, NamedNodeMap attrs)
      throws IOException {
    // Create a vector to hold the property values
    Vector v = new Vector();

    int numAttrs = attrs.getLength();

    for (int i = 0; i < numAttrs; i++) {
      // See if this attribute matches the property name
      if (namesMatch(desc.getName(), attrs.item(i).getNodeName())) {
        // Get the property value
        Object obValue = getObjectValue(desc, attrs.item(i).getNodeValue());

        if (obValue != null) {
          // Add the value to the list of values to be set
          v.addElement(obValue);
        }
      }
    }

    int numNodes = nodes.getLength();

    for (int i = 0; i < numNodes; i++) {
      Node node = nodes.item(i);

      // Skip non-element nodes
      if (!(node instanceof Element)) continue;

      Element element = (Element) node;

      // See if this element tag matches the property name
      if (namesMatch(desc.getName(), element.getTagName())) {
        // Get the property value
        Object obValue = getObjectValue(desc, element);

        if (obValue != null) {
          // Add the value to the list of values to be set
          v.addElement(obValue);
        }
      }
    }

    // Get the method used to set the property value
    Method setter = desc.getWriteMethod();

    // If this property has no setter, don't write it
    if (setter == null) return;

    // Create a new array of property values
    Object propArray = Array.newInstance(desc.getPropertyType().getComponentType(), v.size());

    // Copy the vector into the array
    v.copyInto((Object[]) propArray);

    try {
      // Store the array of property values
      setter.invoke(ob, new Object[] {propArray});
    } catch (InvocationTargetException exc) {
      throw new IOException("Error setting property " + desc.getName() + ": " + exc.toString());
    } catch (IllegalAccessException exc) {
      throw new IOException("Error setting property " + desc.getName() + ": " + exc.toString());
    }
  }
示例#3
0
  /**
   * Reads an XML element into a bean property by first locating the XML element corresponding to
   * this property.
   *
   * @param ob The bean whose property is being set
   * @param desc The property that will be set
   * @param nodes The list of XML items that may contain the property
   * @throws IOException If there is an error reading the document
   */
  public void readProperty(Object ob, PropertyDescriptor desc, NodeList nodes, NamedNodeMap attrs)
      throws IOException {
    int numAttrs = attrs.getLength();

    for (int i = 0; i < numAttrs; i++) {
      // See if the attribute name matches the property name
      if (namesMatch(desc.getName(), attrs.item(i).getNodeName())) {
        // Get the method used to set this property
        Method setter = desc.getWriteMethod();

        // If this object has no setter, don't bother writing it
        if (setter == null) continue;

        // Get the value of the property
        Object obValue = getObjectValue(desc, attrs.item(i).getNodeValue());
        if (obValue != null) {
          try {
            // Set the property value
            setter.invoke(ob, new Object[] {obValue});
          } catch (InvocationTargetException exc) {
            throw new IOException(
                "Error setting property " + desc.getName() + ": " + exc.toString());
          } catch (IllegalAccessException exc) {
            throw new IOException(
                "Error setting property " + desc.getName() + ": " + exc.toString());
          }
        }

        return;
      }
    }

    int numNodes = nodes.getLength();

    Vector arrayBuild = null;

    for (int i = 0; i < numNodes; i++) {
      Node node = nodes.item(i);

      // If this node isn't an element, skip it
      if (!(node instanceof Element)) continue;

      Element element = (Element) node;

      // See if the tag name matches the property name
      if (namesMatch(desc.getName(), element.getTagName())) {
        // Get the method used to set this property
        Method setter = desc.getWriteMethod();

        // If this object has no setter, don't bother writing it
        if (setter == null) continue;

        // Get the value of the property
        Object obValue = getObjectValue(desc, element);

        // 070201 MAW: Modified from change submitted by Steve Poulson
        if (setter.getParameterTypes()[0].isArray()) {
          if (arrayBuild == null) {
            arrayBuild = new Vector();
          }
          arrayBuild.addElement(obValue);

          // 070201 MAW: Go ahead and read through the rest of the nodes in case
          //             another one matches the array. This has the effect of skipping
          //             over the "return" statement down below
          continue;
        }

        if (obValue != null) {
          try {
            // Set the property value
            setter.invoke(ob, new Object[] {obValue});
          } catch (InvocationTargetException exc) {
            throw new IOException(
                "Error setting property " + desc.getName() + ": " + exc.toString());
          } catch (IllegalAccessException exc) {
            throw new IOException(
                "Error setting property " + desc.getName() + ": " + exc.toString());
          }
        }
        return;
      }
    }

    // If we build a vector of array members, convert the vector into
    // an array and save it in the property
    if (arrayBuild != null) {
      // Get the method used to set this property
      Method setter = desc.getWriteMethod();

      if (setter == null) return;

      Object[] obValues = (Object[]) Array.newInstance(desc.getPropertyType(), arrayBuild.size());

      arrayBuild.copyInto(obValues);

      try {
        setter.invoke(ob, new Object[] {obValues});
      } catch (InvocationTargetException exc) {
        throw new IOException("Error setting property " + desc.getName() + ": " + exc.toString());
      } catch (IllegalAccessException exc) {
        throw new IOException("Error setting property " + desc.getName() + ": " + exc.toString());
      }

      return;
    }
  }