public static DialogueOperatorEffect getEffectExpr(Node c, NamedNodeMap att) throws Exception {
boolean isSwapOut = c.getNodeName().toLowerCase().equals(XMLConstants.SWAPOUTID);
boolean isInterrupt = c.getNodeName().toLowerCase().equals(XMLConstants.INTERRUPTID);
boolean isSend = c.getNodeName().toLowerCase().equals(XMLConstants.SENDID);
if (isSwapOut) return createSwapOut();
else if (isInterrupt) return createInterrupt();
else if (isSend) {
Node send = att.getNamedItem(XMLConstants.IDID);
if (send != null) {
String sendEventName = send.getNodeValue();
return createSend(sendEventName);
}
} else {
Node nodeExpr = att.getNamedItem(XMLConstants.EXPRID);
Node nodeGoal = att.getNamedItem(XMLConstants.GOALID);
if (nodeGoal != null) {
String goalName = nodeGoal.getNodeValue();
if (StringUtils.isEmptyString(goalName))
throw new Exception(
"invalid goal effect: '" + XMLUtils.domNode2String(c, true, false) + "'");
String varGoalName = buildVarNameForGoal(goalName);
String valueString =
(nodeExpr != null) ? StringUtils.cleanupSpaces(nodeExpr.getNodeValue()) : null;
DialogueKBFormula value;
if (StringUtils.isEmptyString(valueString)) value = DialogueKBFormula.parse(varGoalName);
else value = DialogueKBFormula.parse(valueString);
value = processGoalExpression(value, varGoalName);
return DialogueOperatorEffect.createGoal(goalName, value);
} else if (nodeExpr != null) {
DialogueOperatorEffect e = DialogueOperatorEffect.parse(nodeExpr.getNodeValue());
DialogueKBFormula f = null;
if (e == null)
throw new Exception(
"Effect '"
+ XMLUtils.domNode2String(c, true, false)
+ "' returned an empty expression for effects (only assertions and assignments).");
else if (e.isAssertion()
&& (((f = e.getAssertedFormula()) == null) || f.isConjunction() || f.isDisjunction()))
throw new Exception("Invalid assertion: " + f);
else if (e.isAssignment() && (e.getAssignedVariable() == null))
throw new Exception("Invalid assignmend: " + f);
else return e;
}
}
return null;
}
