/**
* Gets the type from a field name.
*
* @param fieldRequire the name of the required field
* @param manipulation the metadata extracted from metadata.xml file
* @return the type of the field or {@code null} if it wasn't found
*/
private static String getTypeFromAttributeField(String fieldRequire, PojoMetadata manipulation) {
FieldMetadata field = manipulation.getField(fieldRequire);
if (field == null) {
return null;
} else {
return FieldMetadata.getReflectionType(field.getFieldType());
}
}
/**
* Initialize the component type.
*
* @param desc : component type description to populate.
* @param metadata : component type metadata.
* @throws ConfigurationException : metadata are incorrect.
* @see
* org.apache.felix.ipojo.Handler#initializeComponentFactory(org.apache.felix.ipojo.architecture.ComponentTypeDescription,
* org.apache.felix.ipojo.metadata.Element)
*/
public void initializeComponentFactory(ComponentTypeDescription desc, Element metadata)
throws ConfigurationException {
Element[] confs = metadata.getElements("Properties", "");
if (confs == null) {
return;
}
Element[] configurables = confs[0].getElements("Property");
for (int i = 0; configurables != null && i < configurables.length; i++) {
String fieldName = configurables[i].getAttribute("field");
String methodName = configurables[i].getAttribute("method");
if (fieldName == null && methodName == null) {
throw new ConfigurationException(
"Malformed property : The property needs to contain at least a field or a method");
}
String name = configurables[i].getAttribute("name");
if (name == null) {
if (fieldName == null) {
name = methodName;
} else {
name = fieldName;
}
configurables[i].addAttribute(
new Attribute("name", name)); // Add the type to avoid configure checking
}
String value = configurables[i].getAttribute("value");
// Detect the type of the property
PojoMetadata manipulation = getFactory().getPojoMetadata();
String type = null;
if (fieldName == null) {
MethodMetadata[] method = manipulation.getMethods(methodName);
if (method.length == 0) {
type = configurables[i].getAttribute("type");
if (type == null) {
throw new ConfigurationException(
"Malformed property : The type of the property cannot be discovered, add a 'type' attribute");
}
} else {
if (method[0].getMethodArguments().length != 1) {
throw new ConfigurationException(
"Malformed property : The method " + methodName + " does not have one argument");
}
type = method[0].getMethodArguments()[0];
configurables[i].addAttribute(
new Attribute("type", type)); // Add the type to avoid configure checking
}
} else {
FieldMetadata field = manipulation.getField(fieldName);
if (field == null) {
throw new ConfigurationException(
"Malformed property : The field "
+ fieldName
+ " does not exist in the implementation class");
}
type = field.getFieldType();
configurables[i].addAttribute(
new Attribute("type", type)); // Add the type to avoid configure checking
}
// Is the property set to immutable
boolean immutable = false;
String imm = configurables[i].getAttribute("immutable");
immutable = imm != null && imm.equalsIgnoreCase("true");
boolean mandatory = false;
String man = configurables[i].getAttribute("mandatory");
mandatory = man != null && man.equalsIgnoreCase("true");
PropertyDescription pd = null;
if (value == null) {
pd =
new PropertyDescription(
name, type, null, false); // Cannot be immutable if we have no value.
} else {
pd = new PropertyDescription(name, type, value, immutable);
}
if (mandatory) {
pd.setMandatory();
}
desc.addProperty(pd);
}
}