45 lines
1.3 KiB
Java
45 lines
1.3 KiB
Java
package org.warp.jcwdb;
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import it.unimi.dsi.fastutil.ints.IntArrayList;
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import it.unimi.dsi.fastutil.longs.LongArrayList;
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public class DBLightBigListParser<T> extends DBTypeParserImpl<LightBigList<T>> {
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private final JCWDatabase db;
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public DBLightBigListParser(JCWDatabase db) {
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this.db = db;
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}
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public DBReader<LightBigList<T>> getReader() {
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return (i, size) -> {
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LongArrayList chunks = new LongArrayList();
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IntArrayList chunkSizes = new IntArrayList();
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long max = size / (Long.BYTES + Integer.BYTES);
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for (int item = 0; item < max; item++) {
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long itm = i.readLong();
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int itm2 = i.readInt();
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chunks.add(itm);
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chunkSizes.add(itm2);
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}
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return new LightBigList<T>(db, chunks, chunkSizes);
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};
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}
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public DBDataOutput<LightBigList<T>> getWriter(final LightBigList<T> value) {
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final int elementsCount = value.chunksCount();
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return DBDataOutput.create((o) -> {
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LongArrayList list = value.chunks;
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IntArrayList list2 = value.chunkSizes;
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for (int i = 0; i < elementsCount; i++) {
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o.writeLong(list.getLong(i));
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o.writeInt(list2.getInt(i));
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}
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}, DBStandardTypes.LIGHT_LIST_BIG, elementsCount * (Long.BYTES + Integer.BYTES), calculateHash(value));
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}
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@Override
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public long calculateHash(LightBigList<T> value) {
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return value.chunks.hashCode();
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}
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}
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