@Override
protected String parseFromInternal(String expression) {
if (expression.startsWith("|| ")) {
m_isAnOr = true;
}
if (expression.startsWith("|| ") || expression.startsWith("&& ")) {
expression = expression.substring(3, expression.length());
}
if (expression.charAt(0) == '!') {
setNegated(true);
expression = expression.substring(1, expression.length());
}
if (expression.charAt(0) != '(') {
throw new IllegalArgumentException("Malformed expression! Was expecting a \"(\"");
}
expression = expression.substring(1, expression.length());
while (expression.charAt(0) != ')') {
int offset = 3;
if (expression.charAt(offset) == '(') {
ExpressionNode child = new BracketNode();
expression = child.parseFromInternal(expression);
m_children.add(child);
} else {
// must be an ExpressionClause
ExpressionNode child = new ExpressionClause();
expression = child.parseFromInternal(expression);
m_children.add(child);
}
}
if (m_children.size() > 0) {
m_children.get(0).setShowAndOr(false);
}
return expression;
}
/**
* Initialize with respect to the incoming instance format
*
* @param data the incoming instance format
*/
protected void init(Instances data) {
m_indexOfTrueStep = -1;
m_indexOfFalseStep = -1;
m_connectedFormat = data;
if (m_downstream == null) {
return;
}
if (m_downstream[0] != null
&& ((BeanCommon) m_downstream[0]).getCustomName().equals(m_customNameOfTrueStep)) {
m_indexOfTrueStep = 0;
}
if (m_downstream[0] != null
&& ((BeanCommon) m_downstream[0]).getCustomName().equals(m_customNameOfFalseStep)) {
m_indexOfFalseStep = 0;
}
if (m_downstream[1] != null
&& ((BeanCommon) m_downstream[1]).getCustomName().equals(m_customNameOfTrueStep)) {
m_indexOfTrueStep = 1;
}
if (m_downstream[1] != null
&& ((BeanCommon) m_downstream[1]).getCustomName().equals(m_customNameOfFalseStep)) {
m_indexOfFalseStep = 1;
}
if (m_env == null) {
m_env = Environment.getSystemWide();
}
try {
if (m_expressionString != null && m_expressionString.length() > 0) {
m_root = new BracketNode();
m_root.parseFromInternal(m_expressionString);
}
if (m_root != null) {
m_root.init(data, m_env);
}
} catch (Exception ex) {
ex.printStackTrace();
stop();
m_busy = false;
}
}