thx, great solution
2017-09-11 17:55 GMT+02:00 Adrien Grand <jpou...@gmail.com>:
> You could create a `new IndexSearcher(new MultiReader());`
>
> Le sam. 9 sept. 2017 à 19:40, Mitchell Stevenson <
> mitchell.stevenson...@gmail.com> a écrit :
>
>> I need to implement an IndexSearcher for Lucene 7 which never returns
>> any documents.
>> Is the following implementation suitable for this? The code seems to
>> work nicely but i am not sure about it.
>>
>> IndexSearcher noDocsSearcher = new IndexSearcher(new NoDocsReader());
>>
>> public class NoDocsReader extends LeafReader {
>>
>> private final static Bits liveDocs = new Bits.MatchNoBits(0);
>>
>> public NoDocsReader() {
>> tryIncRef(); //keep reader open
>> }
>>
>> @Override
>> public NumericDocValues getNumericDocValues(final String field)
>> throws IOException {
>> return new NumericDocValues() {
>>
>> @Override
>> public long longValue() throws IOException {
>> return 0;
>> }
>>
>> @Override
>> public boolean advanceExact(int target) throws IOException {
>> return false;
>> }
>>
>> @Override
>> public int docID() {
>> return 0;
>> }
>>
>> @Override
>> public int nextDoc() throws IOException {
>> return 0;
>> }
>>
>> @Override
>> public int advance(int target) throws IOException {
>> return 0;
>> }
>>
>> @Override
>> public long cost() {
>> return 0;
>> }
>> };
>> }
>>
>> @Override
>> public BinaryDocValues getBinaryDocValues(final String field)
>> throws IOException {
>> return null;
>> }
>>
>> @Override
>> public SortedDocValues getSortedDocValues(final String field)
>> throws IOException {
>> return null;
>> }
>>
>> @Override
>> public SortedNumericDocValues getSortedNumericDocValues(final
>> String field) throws IOException {
>> return null;
>> }
>>
>> @Override
>> public SortedSetDocValues getSortedSetDocValues(final String
>> field) throws IOException {
>> return null;
>> }
>>
>> @Override
>> public NumericDocValues getNormValues(final String field) throws
>> IOException {
>> return null;
>> }
>>
>> @Override
>> public FieldInfos getFieldInfos() {
>> return new FieldInfos(new FieldInfo[0]);
>> }
>>
>> @Override
>> public Bits getLiveDocs() {
>> return liveDocs;
>> }
>>
>> @Override
>> public void checkIntegrity() throws IOException {
>> }
>>
>> @Override
>> public Fields getTermVectors(final int docID) throws IOException {
>> return null;
>> }
>>
>> @Override
>> public int numDocs() {
>> return 0;
>> }
>>
>> @Override
>> public int maxDoc() {
>> return 0;
>> }
>>
>> @Override
>> public void document(final int docID, final StoredFieldVisitor
>> visitor) throws IOException {
>> }
>>
>> @Override
>> protected void doClose() throws IOException {
>> }
>>
>> @Override
>> public boolean hasDeletions() {
>> return false;
>> }
>>
>> @Override
>> public CacheHelper getCoreCacheHelper() {
>> return null;
>> }
>>
>> @Override
>> public Terms terms(String field) throws IOException {
>> return null;
>> }
>>
>> @Override
>> public PointValues getPointValues(String field) throws IOException {
>> return null;
>> }
>>
>> @Override
>> public LeafMetaData getMetaData() {
>> return null;
>> }
>>
>> @Override
>> public CacheHelper getReaderCacheHelper() {
>> return null;
>> }
>> }
>>
>> Thanks
>> Mitch
>>
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>>
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