public boolean hasNext() {
if (_tree == null || !_tree.inPagingMold()) return _it.hasNext();
Integer renderedCount = (Integer) _tree.getAttribute(Attributes.RENDERED_ITEM_COUNT);
if (renderedCount == null || renderedCount.intValue() < _tree.getPaginal().getPageSize())
return _it.hasNext();
return false;
}
/** 将决策树输出到标准输出 */
static void outputDecisionTree(Object obj, int level, Object from) {
for (int i = 0; i < level; i++) System.out.print("|-----");
if (from != null) System.out.printf("(%s):", from);
if (obj instanceof Tree) {
Tree tree = (Tree) obj;
String attrName = tree.getAttribute();
System.out.printf("[%s = ?]\n", attrName);
for (Object attrValue : tree.getAttributeValues()) {
Object child = tree.getChild(attrValue);
outputDecisionTree(child, level + 1, attrName + " = " + attrValue);
}
} else {
System.out.printf("[CATEGORY = %s]\n", obj);
}
}
@Override
public Object getAttribute(String name) {
return source.getAttribute(name);
}