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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.
*/
package org.elasticsearch.index.engine;
import org.apache.lucene.index.BinaryDocValues;
import org.apache.lucene.index.DocValuesType;
import org.apache.lucene.index.FieldInfo;
import org.apache.lucene.index.FieldInfos;
import org.apache.lucene.index.Fields;
import org.apache.lucene.index.IndexOptions;
import org.apache.lucene.index.LeafMetaData;
import org.apache.lucene.index.LeafReader;
import org.apache.lucene.index.NumericDocValues;
import org.apache.lucene.index.PointValues;
import org.apache.lucene.index.SortedDocValues;
import org.apache.lucene.index.SortedNumericDocValues;
import org.apache.lucene.index.SortedSetDocValues;
import org.apache.lucene.index.StoredFieldVisitor;
import org.apache.lucene.index.Terms;
import org.apache.lucene.util.Bits;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.Version;
import org.elasticsearch.index.fielddata.AbstractSortedDocValues;
import org.elasticsearch.index.mapper.IdFieldMapper;
import org.elasticsearch.index.mapper.ParentFieldMapper;
import org.elasticsearch.index.mapper.RoutingFieldMapper;
import org.elasticsearch.index.mapper.SourceFieldMapper;
import org.elasticsearch.index.mapper.Uid;
import org.elasticsearch.index.mapper.UidFieldMapper;
import org.elasticsearch.index.translog.Translog;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.Collections;
/**
* Internal class that mocks a single doc read from the transaction log as a leaf reader.
*/
final class TranslogLeafReader extends LeafReader {
private final Translog.Index operation;
private static final FieldInfo FAKE_SOURCE_FIELD
= new FieldInfo(SourceFieldMapper.NAME, 1, false, false, false, IndexOptions.NONE, DocValuesType.NONE, -1, Collections.emptyMap(),
0, 0, false);
private static final FieldInfo FAKE_ROUTING_FIELD
= new FieldInfo(RoutingFieldMapper.NAME, 2, false, false, false, IndexOptions.NONE, DocValuesType.NONE, -1, Collections.emptyMap(),
0, 0, false);
private static final FieldInfo FAKE_ID_FIELD
= new FieldInfo(IdFieldMapper.NAME, 3, false, false, false, IndexOptions.NONE, DocValuesType.NONE, -1, Collections.emptyMap(),
0, 0, false);
private static final FieldInfo FAKE_UID_FIELD
= new FieldInfo(UidFieldMapper.NAME, 4, false, false, false, IndexOptions.NONE, DocValuesType.NONE, -1, Collections.emptyMap(),
0, 0, false);
private final Version indexVersionCreated;
TranslogLeafReader(Translog.Index operation, Version indexVersionCreated) {
this.operation = operation;
this.indexVersionCreated = indexVersionCreated;
}
@Override
public CacheHelper getCoreCacheHelper() {
throw new UnsupportedOperationException();
}
@Override
public Terms terms(String field) {
throw new UnsupportedOperationException();
}
@Override
public NumericDocValues getNumericDocValues(String field) {
throw new UnsupportedOperationException();
}
@Override
public BinaryDocValues getBinaryDocValues(String field) {
throw new UnsupportedOperationException();
}
@Override
public SortedDocValues getSortedDocValues(String field) {
// TODO this can be removed in 7.0 and upwards we don't support the parent field anymore
if (field.startsWith(ParentFieldMapper.NAME + "#") && operation.parent() != null) {
return new AbstractSortedDocValues() {
@Override
public int docID() {
return 0;
}
private final BytesRef term = new BytesRef(operation.parent());
private int ord;
@Override
public boolean advanceExact(int docID) {
if (docID != 0) {
throw new IndexOutOfBoundsException("do such doc ID: " + docID);
}
ord = 0;
return true;
}
@Override
public int ordValue() {
return ord;
}
@Override
public BytesRef lookupOrd(int ord) {
if (ord == 0) {
return term;
}
return null;
}
@Override
public int getValueCount() {
return 1;
}
};
}
if (operation.parent() == null) {
return null;
}
assert false : "unexpected field: " + field;
return null;
}
@Override
public SortedNumericDocValues getSortedNumericDocValues(String field) {
throw new UnsupportedOperationException();
}
@Override
public SortedSetDocValues getSortedSetDocValues(String field) {
throw new UnsupportedOperationException();
}
@Override
public NumericDocValues getNormValues(String field) {
throw new UnsupportedOperationException();
}
@Override
public FieldInfos getFieldInfos() {
throw new UnsupportedOperationException();
}
@Override
public Bits getLiveDocs() {
throw new UnsupportedOperationException();
}
@Override
public PointValues getPointValues(String field) {
throw new UnsupportedOperationException();
}
@Override
public void checkIntegrity() {
}
@Override
public LeafMetaData getMetaData() {
throw new UnsupportedOperationException();
}
@Override
public Fields getTermVectors(int docID) {
throw new UnsupportedOperationException();
}
@Override
public int numDocs() {
return 1;
}
@Override
public int maxDoc() {
return 1;
}
@Override
public void document(int docID, StoredFieldVisitor visitor) throws IOException {
if (docID != 0) {
throw new IllegalArgumentException("no such doc ID " + docID);
}
if (visitor.needsField(FAKE_SOURCE_FIELD) == StoredFieldVisitor.Status.YES) {
assert operation.source().toBytesRef().offset == 0;
assert operation.source().toBytesRef().length == operation.source().toBytesRef().bytes.length;
visitor.binaryField(FAKE_SOURCE_FIELD, operation.source().toBytesRef().bytes);
}
if (operation.routing() != null && visitor.needsField(FAKE_ROUTING_FIELD) == StoredFieldVisitor.Status.YES) {
visitor.stringField(FAKE_ROUTING_FIELD, operation.routing().getBytes(StandardCharsets.UTF_8));
}
if (visitor.needsField(FAKE_ID_FIELD) == StoredFieldVisitor.Status.YES) {
final byte[] id;
if (indexVersionCreated.onOrAfter(Version.V_6_0_0)) {
BytesRef bytesRef = Uid.encodeId(operation.id());
id = new byte[bytesRef.length];
System.arraycopy(bytesRef.bytes, bytesRef.offset, id, 0, bytesRef.length);
} else { // TODO this can go away in 7.0 after backport
id = operation.id().getBytes(StandardCharsets.UTF_8);
}
visitor.stringField(FAKE_ID_FIELD, id);
}
if (visitor.needsField(FAKE_UID_FIELD) == StoredFieldVisitor.Status.YES) {
visitor.stringField(FAKE_UID_FIELD, Uid.createUid(operation.type(), operation.id()).getBytes(StandardCharsets.UTF_8));
}
}
@Override
protected void doClose() {
}
@Override
public CacheHelper getReaderCacheHelper() {
throw new UnsupportedOperationException();
}
}