private String getErrorMessage(
ComponentDescriptor descriptor, ComponentRequirement requirement, String causeDescription) {
StringBuffer msg = new StringBuffer("Component composition failed.");
msg.append(" Failed to resolve requirement for component of role: '");
msg.append(descriptor.getRole());
msg.append("'");
if (descriptor.getRoleHint() != null) {
msg.append(" and role-hint: '");
msg.append(descriptor.getRoleHint());
msg.append("'. ");
}
if (requirement != null) {
msg.append("Failing requirement: " + requirement.getHumanReadableKey());
}
if (causeDescription != null) {
msg.append(causeDescription);
}
return msg.toString();
}
private ComponentRequirement getMatchingRequirement(
ComponentDescriptor componentDescriptor, List requirements) {
ComponentRequirement retValue = null;
String role = componentDescriptor.getRole();
String roleHint = componentDescriptor.getRoleHint();
if (componentDescriptor.getRoleHint() != null) {
for (Iterator iterator = requirements.iterator(); iterator.hasNext(); ) {
ComponentRequirement requirement = (ComponentRequirement) iterator.next();
if (role.equals(requirement.getRole()) && roleHint.equals(requirement.getRoleHint())) {
retValue = requirement;
break;
}
}
} else {
for (Iterator iterator = requirements.iterator(); iterator.hasNext(); ) {
ComponentRequirement requirement = (ComponentRequirement) iterator.next();
if (role.equals(requirement.getRole())) {
retValue = requirement;
break;
}
}
}
return retValue;
}
/** @todo Change this to include components looked up from parents as well... */
public List lookupList(String role) throws ComponentLookupException {
List components = new ArrayList();
List componentDescriptors = getComponentDescriptorList(role);
if (componentDescriptors != null) {
// Now we have a list of component descriptors.
for (Iterator i = componentDescriptors.iterator(); i.hasNext(); ) {
ComponentDescriptor descriptor = (ComponentDescriptor) i.next();
String roleHint = descriptor.getRoleHint();
Object component;
if (roleHint != null) {
component = lookup(role, roleHint);
} else {
component = lookup(role);
}
components.add(component);
}
}
return components;
}