pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / java / org / apache / lucene / index / ParallelPostingsArray.java

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/ParallelPostingsArray.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/ParallelPostingsArray.java
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+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/ParallelPostingsArray.java
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+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 org.apache.lucene.util.ArrayUtil;
+import org.apache.lucene.util.RamUsageEstimator;
+
+class ParallelPostingsArray {
+  final static int BYTES_PER_POSTING = 3 * RamUsageEstimator.NUM_BYTES_INT;
+
+  final int size;
+  final int[] textStarts;
+  final int[] intStarts;
+  final int[] byteStarts;
+
+  ParallelPostingsArray(final int size) {
+    this.size = size;
+    textStarts = new int[size];
+    intStarts = new int[size];
+    byteStarts = new int[size];
+  }
+
+  int bytesPerPosting() {
+    return BYTES_PER_POSTING;
+  }
+
+  ParallelPostingsArray newInstance(int size) {
+    return new ParallelPostingsArray(size);
+  }
+
+  final ParallelPostingsArray grow() {
+    int newSize = ArrayUtil.oversize(size + 1, bytesPerPosting());
+    ParallelPostingsArray newArray = newInstance(newSize);
+    copyTo(newArray, size);
+    return newArray;
+  }
+
+  void copyTo(ParallelPostingsArray toArray, int numToCopy) {
+    System.arraycopy(textStarts, 0, toArray.textStarts, 0, numToCopy);
+    System.arraycopy(intStarts, 0, toArray.intStarts, 0, numToCopy);
+    System.arraycopy(byteStarts, 0, toArray.byteStarts, 0, numToCopy);
+  }
+}