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https://issues.apache.org/jira/browse/LUCENE-7266?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Trejkaz updated LUCENE-7266:
----------------------------
Affects Version/s: 5.4.1
> QueryNode#cloneTree produces a new tree where parents are not correctly set
> ---------------------------------------------------------------------------
>
> Key: LUCENE-7266
> URL: https://issues.apache.org/jira/browse/LUCENE-7266
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/queryparser
> Affects Versions: 5.4.1
> Reporter: Trejkaz
>
> The following unit test performs a sanity check on the QueryNode tree,
> checking that each node has the parent set to the same node it was retrieved
> from. After calling cloneTree, this check fails on the returned node, as the
> parents in the cloned node still point back into the original tree.
> {code}
> import java.util.Arrays;
> import java.util.List;
> import org.apache.lucene.queryparser.flexible.core.nodes.BooleanQueryNode;
> import org.apache.lucene.queryparser.flexible.core.nodes.FieldQueryNode;
> import org.apache.lucene.queryparser.flexible.core.nodes.QueryNode;
> import org.junit.Test;
> public class TestCloneTree {
> @Test
> public void testCloneTree() throws Exception {
> QueryNode original = new BooleanQueryNode(Arrays.asList(
> new FieldQueryNode(null, "a", 0, 0),
> new FieldQueryNode(null, "b", 0, 0)));
> sanityCheckQueryTree(original);
> QueryNode cloned = original.cloneTree();
> sanityCheckQueryTree(cloned);
> }
> private void sanityCheckQueryTree(QueryNode node) {
> List<QueryNode> children = node.getChildren();
> if (children != null) {
> for (QueryNode child : children) {
> // Matching what Lucene is using in QueryNodeImpl itself.
> //noinspection ObjectEquality
> if (child.getParent() != node) {
> throw new IllegalStateException("Sanity check failed for
> child: " + child + '\n' +
> " Parent is: " +
> child.getParent() + '\n' +
> " But we got to it via:
> " + node);
> }
> sanityCheckQueryTree(child);
> }
> }
> }
> }
> {code}
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