public boolean expand(Writer output, Serializable object, RuleOptions options)
throws IOException, RuleException {
boolean expanded = false;
boolean prefixPrinted = false;
boolean atLeastOneChildPrinted = false;
if (object == null) {
if (Debug.isDebug()) {
throw new NullPointerException(); // disclose programming error
// in debug..
} else {
return false;
}
} // end if
if (!(object instanceof DbObject)) {
return false;
} // end if
DbObject dbObject = (DbObject) object;
MetaRelationship metaRelation = getMetaRelation(dbObject);
MetaClass childrenMetaClass = getChildrenMetaClass();
try {
// get metaRelation from its string representation
if (metaRelation == null)
metaRelation = (MetaRelationship) getMetaField(dbObject, sConnector);
boolean state[] = {prefixPrinted, atLeastOneChildPrinted};
if (metaRelation instanceof MetaRelation1) {
MetaRelation1 metaRelation1 = (MetaRelation1) metaRelation;
expanded |=
expandMetaRelation1(output, dbObject, metaRelation1, state, childrenMetaClass, options);
} else if (metaRelation instanceof MetaRelationN) {
expanded |=
expandMetaRelationN(output, dbObject, metaRelation, state, childrenMetaClass, options);
} else if (metaRelation instanceof MetaChoice) {
MetaChoice choice = (MetaChoice) metaRelation;
expanded |= expandMetaChoice(output, dbObject, choice, state, childrenMetaClass, options);
} else {
// TODO: throw 'meta-relationship not supported'
}
super.terminate(output, options);
} catch (DbException ex) {
String msg = ex.getMessage();
throw new RuleException(msg);
} catch (RuntimeException ex) {
String conn = m_connector.getGUIName();
String objectKind = dbObject.getMetaClass().getGUIName();
String msg = InvalidConnectorRuleException.buildMessage(m_ruleName, conn, objectKind);
throw new InvalidConnectorRuleException(msg);
}
return expanded;
}
// set actual actual subrules from its string rule;
public void setActualSubRules(Hashtable table) throws RuleException {
// find childRule from stringRule
childRule = (Rule) table.get(m_childStrRule);
if (m_oneChildStrRule != null) {
oneChildRule = (Rule) table.get(m_oneChildStrRule);
}
// change modifiers with their actual rules
super.setActualModifiers(table);
}
public boolean expandChild(
Writer output,
DbObject parent,
DbObject child,
int nbChildren,
boolean state[], // for {prefixPrinted,
// atLeastOneChildPrinted}
RuleOptions options)
throws DbException, IOException, RuleException {
boolean expanded = false;
boolean prefixPrinted = state[0];
boolean atLeastOneChildPrinted = state[1];
// If no 'WHEN MODIFIER' defined, or one defined that returns true
// if ((m_whenClause == null) ||
boolean condition = true;
if (m_booleanModifier != null) {
condition = m_booleanModifier.evaluate(child);
} // end if
if (condition) {
// Make sure a child has been defined
if (childRule == null) {
String msg = NoChildRuleException.buildMessage(m_ruleName, m_childStrRule);
throw new NoChildRuleException(msg);
}
// create a string buffer
StringWriter sw = new StringWriter();
// take CHILD rule, except if there is one element and ONECHILD rule
// is defined
Rule ruleToUse = childRule;
if ((nbChildren == 1) && (oneChildRule != null)) {
ruleToUse = oneChildRule;
}
// expand the child in the string buffer
boolean childExpanded = ruleToUse.expand(sw, child, options);
if (childExpanded) {
// if there is a prefix to print
if ((prefixModifier != null) && (!prefixPrinted)) {
expanded |= prefixModifier.expand(output, parent, options);
prefixPrinted = true;
} else { // prefix already printed, or no prefix
if (atLeastOneChildPrinted) {
if (separatorModifier != null) {
// expand the SEParator right before to print the
// child
expanded |= separatorModifier.expand(output, parent, options);
} // end if
} // end if
} // end if
// copy the string buffer into the output stream
output.write(sw.toString());
} // end if
expanded |= childExpanded;
if (childExpanded) {
atLeastOneChildPrinted = true;
}
} // end if
state[0] = prefixPrinted;
state[1] = atLeastOneChildPrinted;
return expanded;
}
