/**
* Test whether a specified node is visible in the logical view of a TreeWalker or NodeIterator.
* This function will be called by the implementation of TreeWalker and NodeIterator; it is not
* intended to be called directly from user code.
*
* @param n The node to check to see if it passes the filter or not.
* @return a constant to determine whether the node is accepted, rejected, or skipped, as defined
* above .
*/
public short acceptNode(int n) {
XPathContext xctxt = getXPathContext();
try {
xctxt.pushCurrentNode(n);
for (int i = 0; i < m_nodeTests.length; i++) {
PredicatedNodeTest pnt = m_nodeTests[i];
XObject score = pnt.execute(xctxt, n);
if (score != NodeTest.SCORE_NONE) {
// Note that we are assuming there are no positional predicates!
if (pnt.getPredicateCount() > 0) {
if (pnt.executePredicates(n, xctxt)) return DTMIterator.FILTER_ACCEPT;
} else return DTMIterator.FILTER_ACCEPT;
}
}
} catch (javax.xml.transform.TransformerException se) {
// TODO: Fix this.
throw new RuntimeException(se.getMessage());
} finally {
xctxt.popCurrentNode();
}
return DTMIterator.FILTER_SKIP;
}
/**
* Add a node test to the union list.
*
* @param test reference to a NodeTest, which will be added directly to the list of node tests (in
* other words, it will not be cloned). The parent of this test will be set to this object.
*/
public void addNodeTest(PredicatedNodeTest test) {
// Increase array size by only 1 at a time. Fix this
// if it looks to be a problem.
if (null == m_nodeTests) {
m_nodeTests = new PredicatedNodeTest[1];
m_nodeTests[0] = test;
} else {
PredicatedNodeTest[] tests = m_nodeTests;
int len = m_nodeTests.length;
m_nodeTests = new PredicatedNodeTest[len + 1];
System.arraycopy(tests, 0, m_nodeTests, 0, len);
m_nodeTests[len] = test;
}
test.exprSetParent(this);
}
