/**
* Gets the specified method from a query module.
*
* @param mod query module object
* @param path path of the module
* @param name method name
* @param arity number of arguments
* @param qc query context
* @param ii input info
* @return method if found, {@code null} otherwise
* @throws QueryException query exception
*/
private static Method getModMethod(
final Object mod,
final String path,
final String name,
final long arity,
final QueryContext qc,
final InputInfo ii)
throws QueryException {
// find method with identical name and arity
Method meth = null;
for (final Method m : mod.getClass().getMethods()) {
if (m.getName().equals(name) && m.getParameterTypes().length == arity) {
if (meth != null) throw JAVAAMBIG_X.get(ii, "Q{" + path + '}' + name + '#' + arity);
meth = m;
}
}
if (meth == null) throw FUNCJAVA_X.get(ii, path + ':' + name);
// check if user has sufficient permissions to call the function
Perm perm = Perm.ADMIN;
final QueryModule.Requires req = meth.getAnnotation(QueryModule.Requires.class);
if (req != null) perm = Perm.get(req.value().name());
if (!qc.context.user.has(perm)) return null;
// Add module locks to QueryContext.
final QueryModule.Lock lock = meth.getAnnotation(QueryModule.Lock.class);
if (lock != null) {
for (final String read : lock.read()) qc.readLocks.add(DBLocking.MODULE_PREFIX + read);
for (final String write : lock.write()) qc.writeLocks.add(DBLocking.MODULE_PREFIX + write);
}
return meth;
}
/**
* 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;
}
}