/**
* An attribute is valid if declared in an ancestor, and not set in an ancestor. Check if the
* value is conforming to its type (string, int, boolean). Internal attribute (associated with a
* field) cannot be set. Must be called on the level above.
*
* <p>Checks if attr is correctly defined for component ent it must be explicitly defined in its
* upper groups, for the top group, it must be already existing.
*
* <p>boolean Forced = true can be set only by Apform. Needed when an internal attribute is set in
* the program, Apform propagates the value to the attribute.
*
* @param attr
* @param value
* @return
*/
public PropertyDefinition validDef(String attr, boolean forced) {
if (Attribute.isFinalAttribute(attr)) {
logger.error("In " + this + ", cannot redefine final attribute \"" + attr + "\"");
return null;
}
if (Attribute.isReservedAttributePrefix(attr)) {
logger.error("In " + this + ", attribute\"" + attr + "\" is reserved");
return null;
}
PropertyDefinition definition = this.getAttrDefinition(attr);
if (definition == null) {
logger.error("In " + this + ", attribute \"" + attr + "\" is undefined.");
return null;
}
/*
* Internal field attributes cannot be set
*/
if (definition.getInjected() == InjectedPropertyPolicy.INTERNAL && !forced) {
logger.error(
"In "
+ this
+ ", attribute \""
+ attr
+ "\" is an internal field attribute and cannot be set.");
return null;
}
/*
* if the same attribute exists above, it is a redefinition.
*/
ComponentImpl group = (ComponentImpl) this.getGroup();
if (group != null && group.get(attr) != null) {
Object groupValue = group.get(attr);
String defaultValue = definition.getDefaultValue();
boolean isDefault =
defaultValue != null
&& groupValue.equals(
Attribute.checkAttrType(attr, defaultValue, definition.getType()));
// If the attribute above is the default value, it is allowed to change it
if (!isDefault && !Attribute.isBuiltAttribute(attr)) {
logger.error("In " + this + ", cannot redefine attribute \"" + attr + "\"");
return null;
}
}
return definition;
}