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LUCENE-7489: Wrap only once in case GCD compression is used.

This commit is contained in:
Adrien Grand 2016-10-18 16:07:52 +02:00
parent 739981b6c8
commit a17e92006f
1 changed files with 27 additions and 36 deletions
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63
lucene/core/src/java/org/apache/lucene/codecs/lucene70/Lucene70DocValuesProducer.java
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@ -424,47 +424,38 @@ final class Lucene70DocValuesProducer extends DocValuesProducer implements Close
};
} else {
final RandomAccessInput slice = data.randomAccessSlice(entry.valuesOffset, entry.valuesLength);
LongValues values = DirectReader.getInstance(slice, entry.bitsPerValue);
if (entry.gcd != 1) {
values = applyGcd(values, entry.gcd);
}
if (entry.minValue != 0) {
values = applyDelta(values, entry.minValue);
}
final LongValues values = DirectReader.getInstance(slice, entry.bitsPerValue);
if (entry.table != null) {
values = applyTable(values, entry.table);
final long[] table = entry.table;
return new LongValues() {
@Override
public long get(long index) {
return table[(int) values.get(index)];
}
};
} else if (entry.gcd != 1) {
final long gcd = entry.gcd;
final long minValue = entry.minValue;
return new LongValues() {
@Override
public long get(long index) {
return values.get(index) * gcd + minValue;
}
};
} else if (entry.minValue != 0) {
final long minValue = entry.minValue;
return new LongValues() {
@Override
public long get(long index) {
return values.get(index) + minValue;
}
};
} else {
return values;
}
return values;
}
}
private LongValues applyDelta(LongValues values, long delta) {
return new LongValues() {
@Override
public long get(long index) {
return delta + values.get(index);
}
};
}
private LongValues applyGcd(LongValues values, long gcd) {
return new LongValues() {
@Override
public long get(long index) {
return values.get(index) * gcd;
}
};
}
private LongValues applyTable(LongValues values, long[] table) {
return new LongValues() {
@Override
public long get(long index) {
return table[(int) values.get(index)];
}
};
}
@Override
public BinaryDocValues getBinary(FieldInfo field) throws IOException {
BinaryEntry entry = binaries.get(field.name);