/**
* 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());
}
}
}
/**
* 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());
}
}
/**
* 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;
}
}