pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / test-framework / java / org / apache / lucene / index / MockRandomMergePolicy.java

diff --git a/lucene-java-3.5.0/lucene/src/test-framework/java/org/apache/lucene/index/MockRandomMergePolicy.java b/lucene-java-3.5.0/lucene/src/test-framework/java/org/apache/lucene/index/MockRandomMergePolicy.java
new file mode 100644 (file)
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+++ b/lucene-java-3.5.0/lucene/src/test-framework/java/org/apache/lucene/index/MockRandomMergePolicy.java
@@ -0,0 +1,111 @@
+package org.apache.lucene.index;
+
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Random;
+import java.util.Map;
+
+import org.apache.lucene.util._TestUtil;
+
+public class MockRandomMergePolicy extends MergePolicy {
+  private final Random random;
+
+  public MockRandomMergePolicy(Random random) {
+    // fork a private random, since we are called
+    // unpredictably from threads:
+    this.random = new Random(random.nextLong());
+  }
+
+  @Override
+  public MergeSpecification findMerges(SegmentInfos segmentInfos) {
+    MergeSpecification mergeSpec = null;
+    //System.out.println("MRMP: findMerges sis=" + segmentInfos);
+
+    if (segmentInfos.size() > 1 && random.nextInt(5) == 3) {
+      
+      List<SegmentInfo> segments = new ArrayList<SegmentInfo>(segmentInfos.asList());
+      Collections.shuffle(segments, random);
+
+      // TODO: sometimes make more than 1 merge?
+      mergeSpec = new MergeSpecification();
+      final int segsToMerge = _TestUtil.nextInt(random, 1, segmentInfos.size());
+      mergeSpec.add(new OneMerge(segments.subList(0, segsToMerge)));
+    }
+
+    return mergeSpec;
+  }
+
+  @Override
+  public MergeSpecification findForcedMerges(
+       SegmentInfos segmentInfos, int maxSegmentCount, Map<SegmentInfo,Boolean> segmentsToMerge)
+    throws CorruptIndexException, IOException {
+
+    final List<SegmentInfo> eligibleSegments = new ArrayList<SegmentInfo>();
+    for(SegmentInfo info : segmentInfos) {
+      if (segmentsToMerge.containsKey(info)) {
+        eligibleSegments.add(info);
+      }
+    }
+
+    //System.out.println("MRMP: findMerges sis=" + segmentInfos + " eligible=" + eligibleSegments);
+    MergeSpecification mergeSpec = null;
+    if (eligibleSegments.size() > 1 || (eligibleSegments.size() == 1 && eligibleSegments.get(0).hasDeletions())) {
+      mergeSpec = new MergeSpecification();
+      // Already shuffled having come out of a set but
+      // shuffle again for good measure:
+      Collections.shuffle(eligibleSegments, random);
+      int upto = 0;
+      while(upto < eligibleSegments.size()) {
+        int max = Math.min(10, eligibleSegments.size()-upto);
+        int inc = max <= 2 ? max : _TestUtil.nextInt(random, 2, max);
+        mergeSpec.add(new OneMerge(eligibleSegments.subList(upto, upto+inc)));
+        upto += inc;
+      }
+    }
+
+    if (mergeSpec != null) {
+      for(OneMerge merge : mergeSpec.merges) {
+        for(SegmentInfo info : merge.segments) {
+          assert segmentsToMerge.containsKey(info);
+        }
+      }
+    }
+    return mergeSpec;
+  }
+
+  @Override
+  public MergeSpecification findForcedDeletesMerges(
+      SegmentInfos segmentInfos)
+    throws CorruptIndexException, IOException {
+    return findMerges(segmentInfos);
+  }
+
+  @Override
+  public void close() {
+  }
+
+  @Override
+  public boolean useCompoundFile(SegmentInfos infos, SegmentInfo mergedInfo) throws IOException {
+    // 80% of the time we create CFS:
+    return random.nextInt(5) != 1;
+  }
+}