/**
* 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());
}
}
/**
* Processes the request coming to the servlet and grabs the attributes set by the servlet and
* uses them to fire off pre-determined methods set in the setupActionMethods function of the
* servlet.
*
* @param request the http request coming from the browser.
* @param response the http response going to the browser.
* @throws javax.servlet.ServletException
* @throws java.io.IOException
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
if (!actionInitialized) {
LogController.write(this, "This dispatcher servlet is not initialized properly!");
return;
}
if (actionTag == null) {
LogController.write(this, "There is no action attribute tag name!");
return;
}
HttpSession httpSession = request.getSession();
UserSession userSession = (UserSession) httpSession.getAttribute("user_session");
if (userSession == null) {
LogController.write(this, "User session is no longer available in this http session.");
userSession = new UserSession();
// We always want a user session though...
httpSession.setAttribute("user_session", userSession);
}
String action = (String) request.getAttribute(actionTag);
try {
if (action == null) {
// There is no action attribute specified, check parameters.
String external_action = (String) request.getParameter(actionTag);
if (external_action != null) {
Method method = externalActions.get(external_action);
if (method != null) {
LogController.write(this, "Performing external action: " + external_action);
method.invoke(this, new Object[] {userSession, request, response});
} else {
if (defaultExternalMethod != null) {
LogController.write(this, "Performing default external action.");
defaultExternalMethod.invoke(this, new Object[] {userSession, request, response});
} else {
LogController.write(this, "Unable to perform default external action.");
}
}
} else {
if (defaultExternalMethod != null) {
LogController.write(this, "Performing default external action.");
defaultExternalMethod.invoke(this, new Object[] {userSession, request, response});
} else {
LogController.write(this, "Unable to perform default external action.");
}
}
} else {
Method method = internalActions.get(action);
if (method != null) {
LogController.write(this, "Performing internal action: " + action);
method.invoke(this, new Object[] {userSession, request, response});
} else {
if (defaultInternalMethod != null) {
LogController.write(this, "Performing default internal action.");
defaultInternalMethod.invoke(this, new Object[] {userSession, request, response});
} else {
LogController.write(this, "Unable to perform default internal action.");
}
}
request.removeAttribute("application_action");
}
} catch (IllegalAccessException accessEx) {
LogController.write(this, "Exception while processing request: " + accessEx.getMessage());
} catch (InvocationTargetException invokeEx) {
LogController.write(this, "Exception while processing request: " + invokeEx.toString());
invokeEx.printStackTrace();
} catch (Exception ex) {
LogController.write(this, "Unknown exception: " + ex.toString());
}
}
/**
* 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;
}
}