| 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.Iterator; |
| import java.util.NoSuchElementException; |
| |
| import org.apache.lucene.codecs.DocValuesConsumer; |
| import org.apache.lucene.util.Counter; |
| import org.apache.lucene.util.OpenBitSet; |
| import org.apache.lucene.util.RamUsageEstimator; |
| import org.apache.lucene.util.packed.AppendingDeltaPackedLongBuffer; |
| import org.apache.lucene.util.packed.PackedInts; |
| |
| /** Buffers up pending long per doc, then flushes when |
| * segment flushes. */ |
| class NumericDocValuesWriter extends DocValuesWriter { |
| |
| private final static long MISSING = 0L; |
| |
| private AppendingDeltaPackedLongBuffer pending; |
| private final Counter iwBytesUsed; |
| private long bytesUsed; |
| private final OpenBitSet docsWithField; |
| private final FieldInfo fieldInfo; |
| private final boolean trackDocsWithField; |
| |
| public NumericDocValuesWriter(FieldInfo fieldInfo, Counter iwBytesUsed, boolean trackDocsWithField) { |
| pending = new AppendingDeltaPackedLongBuffer(PackedInts.COMPACT); |
| docsWithField = new OpenBitSet(); |
| bytesUsed = pending.ramBytesUsed() + docsWithFieldBytesUsed(); |
| this.fieldInfo = fieldInfo; |
| this.iwBytesUsed = iwBytesUsed; |
| iwBytesUsed.addAndGet(bytesUsed); |
| this.trackDocsWithField = trackDocsWithField; |
| } |
| |
| public void addValue(int docID, long value) { |
| if (docID < pending.size()) { |
| throw new IllegalArgumentException("DocValuesField \"" + fieldInfo.name + "\" appears more than once in this document (only one value is allowed per field)"); |
| } |
| |
| // Fill in any holes: |
| for (int i = (int)pending.size(); i < docID; ++i) { |
| pending.add(MISSING); |
| } |
| |
| pending.add(value); |
| if (trackDocsWithField) { |
| docsWithField.set(docID); |
| } |
| |
| updateBytesUsed(); |
| } |
| |
| private long docsWithFieldBytesUsed() { |
| // size of the long[] + some overhead |
| return RamUsageEstimator.sizeOf(docsWithField.getBits()) + 64; |
| } |
| |
| private void updateBytesUsed() { |
| final long newBytesUsed = pending.ramBytesUsed() + docsWithFieldBytesUsed(); |
| iwBytesUsed.addAndGet(newBytesUsed - bytesUsed); |
| bytesUsed = newBytesUsed; |
| } |
| |
| @Override |
| public void finish(int maxDoc) { |
| } |
| |
| @Override |
| public void flush(SegmentWriteState state, DocValuesConsumer dvConsumer) throws IOException { |
| |
| final int maxDoc = state.segmentInfo.getDocCount(); |
| |
| dvConsumer.addNumericField(fieldInfo, |
| new Iterable<Number>() { |
| @Override |
| public Iterator<Number> iterator() { |
| return new NumericIterator(maxDoc); |
| } |
| }); |
| } |
| |
| @Override |
| public void abort() { |
| } |
| |
| // iterates over the values we have in ram |
| private class NumericIterator implements Iterator<Number> { |
| final AppendingDeltaPackedLongBuffer.Iterator iter = pending.iterator(); |
| final int size = (int)pending.size(); |
| final int maxDoc; |
| int upto; |
| |
| NumericIterator(int maxDoc) { |
| this.maxDoc = maxDoc; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return upto < maxDoc; |
| } |
| |
| @Override |
| public Number next() { |
| if (!hasNext()) { |
| throw new NoSuchElementException(); |
| } |
| Long value; |
| if (upto < size) { |
| long v = iter.next(); |
| if (!trackDocsWithField || docsWithField.get(upto)) { |
| value = v; |
| } else { |
| value = null; |
| } |
| } else { |
| value = trackDocsWithField ? null : MISSING; |
| } |
| upto++; |
| return value; |
| } |
| |
| @Override |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| } |