BasicUsageExample: ArtifactInfo may be null

`IndexUtils.constructArtifactInfo(doc, centralContext)` may return null, for example deleted artifacts. Also `IndexReader.document(int)` is deprecated, use `.storedFields()` to retrieve document. Signed-off-by: 司芳源 <[email protected]>
apache · Oct 20, 2024 · 1a6bf5b · 1a6bf5b
1 parent a4ffdfb
commit 1a6bf5b
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/...dexer-examples-basic/src/main/java/org/apache/maven/index/examples/BasicUsageExample.java b/...dexer-examples-basic/src/main/java/org/apache/maven/index/examples/BasicUsageExample.java
@@ -42,6 +42,7 @@
 import org.apache.lucene.document.Document;
 import org.apache.lucene.index.IndexReader;
 import org.apache.lucene.index.MultiBits;
+import org.apache.lucene.index.StoredFields;
 import org.apache.lucene.search.BooleanClause.Occur;
 import org.apache.lucene.search.BooleanQuery;
 import org.apache.lucene.search.IndexSearcher;
@@ -162,13 +163,16 @@ public void perform() throws IOException, InvalidVersionSpecificationException {
             final IndexSearcher searcher = centralContext.acquireIndexSearcher();
             try {
                 final IndexReader ir = searcher.getIndexReader();
+                final StoredFields storedFields = ir.storedFields();
                 Bits liveDocs = MultiBits.getLiveDocs(ir);
                 for (int i = 0; i < ir.maxDoc(); i++) {
                     if (liveDocs == null || liveDocs.get(i)) {
-                        final Document doc = ir.document(i);
+                        final Document doc = storedFields.document(i);
                         final ArtifactInfo ai = IndexUtils.constructArtifactInfo(doc, centralContext);
-                        System.out.println(ai.getGroupId() + ":" + ai.getArtifactId() + ":" + ai.getVersion() + ":"
-                                + ai.getClassifier() + " (sha1=" + ai.getSha1() + ")");
+                        if (ai != null) {
+                            System.out.println(ai.getGroupId() + ":" + ai.getArtifactId() + ":" + ai.getVersion() + ":"
+                                    + ai.getClassifier() + " (sha1=" + ai.getSha1() + ")");
+                        }
                     }
                 }
             } finally {