[Star Tree] Lucene Abstractions for Star Tree File Formats (#15278)

---------
Signed-off-by: Sarthak Aggarwal <[email protected]>

server/src/main/java/org/apache/lucene/codecs/lucene90/Lucene90DocValuesConsumerWrapper.java

@@ -0,0 +1,46 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.apache.lucene.codecs.lucene90;
+
+import org.apache.lucene.codecs.DocValuesConsumer;
+import org.apache.lucene.index.SegmentWriteState;
+
+import java.io.Closeable;
+import java.io.IOException;
+
+/**
+ * This class is an abstraction of the {@link DocValuesConsumer} for the Star Tree index structure.
+ * It is responsible to consume various types of document values (numeric, binary, sorted, sorted numeric,
+ * and sorted set) for fields in the Star Tree index.
+ *
+ * @opensearch.experimental
+ */
+public class Lucene90DocValuesConsumerWrapper implements Closeable {
+
+    private final Lucene90DocValuesConsumer lucene90DocValuesConsumer;
+
+    public Lucene90DocValuesConsumerWrapper(
+        SegmentWriteState state,
+        String dataCodec,
+        String dataExtension,
+        String metaCodec,
+        String metaExtension
+    ) throws IOException {
+        lucene90DocValuesConsumer = new Lucene90DocValuesConsumer(state, dataCodec, dataExtension, metaCodec, metaExtension);
+    }
+
+    public Lucene90DocValuesConsumer getLucene90DocValuesConsumer() {
+        return lucene90DocValuesConsumer;
+    }
+
+    @Override
+    public void close() throws IOException {
+        lucene90DocValuesConsumer.close();
+    }
+}

server/src/main/java/org/apache/lucene/codecs/lucene90/Lucene90DocValuesProducerWrapper.java

@@ -0,0 +1,46 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.apache.lucene.codecs.lucene90;
+
+import org.apache.lucene.codecs.DocValuesProducer;
+import org.apache.lucene.index.SegmentReadState;
+
+import java.io.Closeable;
+import java.io.IOException;
+
+/**
+ * This class is a custom abstraction of the {@link DocValuesProducer} for the Star Tree index structure.
+ * It is responsible for providing access to various types of document values (numeric, binary, sorted, sorted numeric,
+ * and sorted set) for fields in the Star Tree index.
+ *
+ * @opensearch.experimental
+ */
+public class Lucene90DocValuesProducerWrapper implements Closeable {
+
+    private final Lucene90DocValuesProducer lucene90DocValuesProducer;
+
+    public Lucene90DocValuesProducerWrapper(
+        SegmentReadState state,
+        String dataCodec,
+        String dataExtension,
+        String metaCodec,
+        String metaExtension
+    ) throws IOException {
+        lucene90DocValuesProducer = new Lucene90DocValuesProducer(state, dataCodec, dataExtension, metaCodec, metaExtension);
+    }
+
+    public DocValuesProducer getLucene90DocValuesProducer() {
+        return lucene90DocValuesProducer;
+    }
+
+    @Override
+    public void close() throws IOException {
+        lucene90DocValuesProducer.close();
+    }
+}

server/src/main/java/org/apache/lucene/index/SortedNumericDocValuesWriterWrapper.java

@@ -0,0 +1,53 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.apache.lucene.index;
+
+import org.apache.lucene.util.Counter;
+
+/**
+ * A wrapper class for writing sorted numeric doc values.
+ * <p>
+ * This class provides a convenient way to add sorted numeric doc values to a field
+ * and retrieve the corresponding {@link SortedNumericDocValues} instance.
+ *
+ * @opensearch.experimental
+ */
+public class SortedNumericDocValuesWriterWrapper {
+
+    private final SortedNumericDocValuesWriter sortedNumericDocValuesWriter;
+
+    /**
+     * Sole constructor. Constructs a new {@link SortedNumericDocValuesWriterWrapper} instance.
+     *
+     * @param fieldInfo the field information for the field being written
+     * @param counter a counter for tracking memory usage
+     */
+    public SortedNumericDocValuesWriterWrapper(FieldInfo fieldInfo, Counter counter) {
+        sortedNumericDocValuesWriter = new SortedNumericDocValuesWriter(fieldInfo, counter);
+    }
+
+    /**
+     * Adds a value to the sorted numeric doc values for the specified document.
+     *
+     * @param docID the document ID
+     * @param value the value to add
+     */
+    public void addValue(int docID, long value) {
+        sortedNumericDocValuesWriter.addValue(docID, value);
+    }
+
+    /**
+     * Returns the {@link SortedNumericDocValues} instance containing the sorted numeric doc values
+     *
+     * @return the {@link SortedNumericDocValues} instance
+     */
+    public SortedNumericDocValues getDocValues() {
+        return sortedNumericDocValuesWriter.getDocValues();
+    }
+}

server/src/main/java/org/opensearch/index/codec/composite/CompositeCodecFactory.java

@@ -12,6 +12,7 @@
 import org.apache.lucene.codecs.Codec;
 import org.apache.lucene.codecs.lucene99.Lucene99Codec;
 import org.opensearch.common.annotation.ExperimentalApi;
+import org.opensearch.index.codec.composite.composite99.Composite99Codec;
 import org.opensearch.index.mapper.MapperService;
 
 import java.util.HashMap;
@@ -29,6 +30,10 @@
  */
 @ExperimentalApi
 public class CompositeCodecFactory {
+
+    // we can use this to track the latest composite codec
+    public static final String COMPOSITE_CODEC = Composite99Codec.COMPOSITE_INDEX_CODEC_NAME;
+
     public CompositeCodecFactory() {}
 
     public Map<String, Codec> getCompositeIndexCodecs(MapperService mapperService, Logger logger) {

server/src/main/java/org/opensearch/index/codec/composite/LuceneDocValuesConsumerFactory.java

@@ -0,0 +1,50 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.index.codec.composite;
+
+import org.apache.lucene.codecs.DocValuesConsumer;
+import org.apache.lucene.codecs.lucene90.Lucene90DocValuesConsumerWrapper;
+import org.apache.lucene.index.SegmentWriteState;
+
+import java.io.IOException;
+
+/**
+ * A factory class that provides a factory method for creating {@link DocValuesConsumer} instances
+ * for the latest composite codec.
+ * <p>
+ * The segments are written using the latest composite codec. The codec
+ * internally manages calling the appropriate consumer factory for its abstractions.
+ * <p>
+ * This design ensures forward compatibility for writing operations
+ *
+ * @opensearch.experimental
+ */
+public class LuceneDocValuesConsumerFactory {
+
+    public static DocValuesConsumer getDocValuesConsumerForCompositeCodec(
+        SegmentWriteState state,
+        String dataCodec,
+        String dataExtension,
+        String metaCodec,
+        String metaExtension
+    ) throws IOException {
+        try (
+            Lucene90DocValuesConsumerWrapper lucene90DocValuesConsumerWrapper = new Lucene90DocValuesConsumerWrapper(
+                state,
+                dataCodec,
+                dataExtension,
+                metaCodec,
+                metaExtension
+            )
+        ) {
+            return lucene90DocValuesConsumerWrapper.getLucene90DocValuesConsumer();
+        }
+    }
+
+}

server/src/main/java/org/opensearch/index/codec/composite/LuceneDocValuesProducerFactory.java

@@ -0,0 +1,60 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.index.codec.composite;
+
+import org.apache.lucene.codecs.DocValuesProducer;
+import org.apache.lucene.codecs.lucene90.Lucene90DocValuesProducerWrapper;
+import org.apache.lucene.index.SegmentReadState;
+import org.opensearch.index.codec.composite.composite99.Composite99Codec;
+
+import java.io.IOException;
+
+/**
+ * A factory class that provides a factory method for creating {@link DocValuesProducer} instances
+ * based on the specified composite codec.
+ * <p>
+ * In producers, we want to ensure compatibility with older codec versions during the segment reads.
+ * This approach allows for writing with only the latest codec while maintaining
+ * the ability to read data encoded with any codec version present in the segment.
+ * <p>
+ * This design ensures backward compatibility for reads across different codec versions.
+ *
+ * @opensearch.experimental
+ */
+public class LuceneDocValuesProducerFactory {
+
+    public static DocValuesProducer getDocValuesProducerForCompositeCodec(
+        String compositeCodec,
+        SegmentReadState state,
+        String dataCodec,
+        String dataExtension,
+        String metaCodec,
+        String metaExtension
+    ) throws IOException {
+
+        switch (compositeCodec) {
+            case Composite99Codec.COMPOSITE_INDEX_CODEC_NAME:
+                try (
+                    Lucene90DocValuesProducerWrapper lucene90DocValuesProducerWrapper = new Lucene90DocValuesProducerWrapper(
+                        state,
+                        dataCodec,
+                        dataExtension,
+                        metaCodec,
+                        metaExtension
+                    )
+                ) {
+                    return lucene90DocValuesProducerWrapper.getLucene90DocValuesProducer();
+                }
+            default:
+                throw new IllegalStateException("Invalid composite codec " + "[" + compositeCodec + "]");
+        }
+
+    }
+
+}

server/src/main/java/org/opensearch/index/codec/composite/Composite99Codec.java → server/src/main/java/org/opensearch/index/codec/composite/composite99/Composite99Codec.java

@@ -6,7 +6,7 @@
  * compatible open source license.
  */
 
-package org.opensearch.index.codec.composite;
+package org.opensearch.index.codec.composite.composite99;
 
 import org.apache.logging.log4j.Logger;
 import org.apache.lucene.codecs.Codec;

server/src/main/java/org/opensearch/index/codec/composite/Composite99DocValuesFormat.java → server/src/main/java/org/opensearch/index/codec/composite/composite99/Composite99DocValuesFormat.java

@@ -6,7 +6,7 @@
  * compatible open source license.
  */
 
-package org.opensearch.index.codec.composite;
+package org.opensearch.index.codec.composite.composite99;
 
 import org.apache.lucene.codecs.DocValuesConsumer;
 import org.apache.lucene.codecs.DocValuesFormat;

server/src/main/java/org/opensearch/index/codec/composite/Composite99DocValuesReader.java → server/src/main/java/org/opensearch/index/codec/composite/composite99/Composite99DocValuesReader.java

@@ -6,7 +6,7 @@
  * compatible open source license.
  */
 
-package org.opensearch.index.codec.composite;
+package org.opensearch.index.codec.composite.composite99;
 
 import org.apache.lucene.codecs.DocValuesProducer;
 import org.apache.lucene.index.BinaryDocValues;
@@ -17,6 +17,9 @@
 import org.apache.lucene.index.SortedNumericDocValues;
 import org.apache.lucene.index.SortedSetDocValues;
 import org.opensearch.common.annotation.ExperimentalApi;
+import org.opensearch.index.codec.composite.CompositeIndexFieldInfo;
+import org.opensearch.index.codec.composite.CompositeIndexReader;
+import org.opensearch.index.codec.composite.CompositeIndexValues;
 
 import java.io.IOException;
 import java.util.ArrayList;

server/src/main/java/org/opensearch/index/codec/composite/Composite99DocValuesWriter.java → server/src/main/java/org/opensearch/index/codec/composite/composite99/Composite99DocValuesWriter.java

@@ -6,7 +6,7 @@
  * compatible open source license.
  */
 
-package org.opensearch.index.codec.composite;
+package org.opensearch.index.codec.composite.composite99;
 
 import org.apache.lucene.codecs.DocValuesConsumer;
 import org.apache.lucene.codecs.DocValuesProducer;
@@ -18,6 +18,9 @@
 import org.apache.lucene.index.SegmentWriteState;
 import org.apache.lucene.index.SortedNumericDocValues;
 import org.opensearch.common.annotation.ExperimentalApi;
+import org.opensearch.index.codec.composite.CompositeIndexFieldInfo;
+import org.opensearch.index.codec.composite.CompositeIndexReader;
+import org.opensearch.index.codec.composite.CompositeIndexValues;
 import org.opensearch.index.codec.composite.datacube.startree.StarTreeValues;
 import org.opensearch.index.compositeindex.datacube.startree.StarTreeField;
 import org.opensearch.index.compositeindex.datacube.startree.builder.StarTreesBuilder;

server/src/main/java/org/opensearch/index/codec/composite/composite99/package-info.java

@@ -0,0 +1,12 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+/**
+ *  Responsible for handling all composite index codecs and operations associated with Composite99 codec
+ */
+package org.opensearch.index.codec.composite.composite99;

server/src/main/resources/META-INF/services/org.apache.lucene.codecs.Codec

@@ -1 +1 @@
-org.opensearch.index.codec.composite.Composite99Codec
+org.opensearch.index.codec.composite.composite99.Composite99Codec

server/src/test/java/org/opensearch/index/codec/CodecTests.java

@@ -48,7 +48,7 @@
 import org.opensearch.env.Environment;
 import org.opensearch.index.IndexSettings;
 import org.opensearch.index.analysis.IndexAnalyzers;
-import org.opensearch.index.codec.composite.Composite99Codec;
+import org.opensearch.index.codec.composite.composite99.Composite99Codec;
 import org.opensearch.index.engine.EngineConfig;
 import org.opensearch.index.mapper.MapperService;
 import org.opensearch.index.similarity.SimilarityService;