com.cosmian.jna.findex.ffi.UpdateLines Maven / Gradle / Ivy

package com.cosmian.jna.findex.ffi;

import java.util.List;
import java.util.Map;

import com.cosmian.jna.findex.ffi.FindexNativeWrapper.UpdateLinesCallback;
import com.cosmian.jna.findex.ffi.FindexUserCallbacks.DBUpdateLines;
import com.cosmian.jna.findex.serde.Leb128Reader;
import com.cosmian.jna.findex.structs.ChainTableValue;
import com.cosmian.jna.findex.structs.EntryTableValue;
import com.cosmian.jna.findex.structs.Uid32;
import com.cosmian.utils.CloudproofException;
import com.sun.jna.Pointer;

public class UpdateLines implements UpdateLinesCallback {

    private DBUpdateLines update;

    public UpdateLines(DBUpdateLines update) {
        this.update = update;
    }

    @Override
    public int apply(Pointer removedChainsPointer,
                     int removedChainsLength,
                     Pointer newEntriesPointer,
                     int newEntriesLength,
                     Pointer newChainsPointer,
                     int newChainsLength)
        throws CloudproofException {

        byte[] removedChainsBytes = new byte[removedChainsLength];
        removedChainsPointer.read(0, removedChainsBytes, 0, removedChainsLength);
        List removedChains = Leb128Reader.deserializeCollection(Uid32.class, removedChainsBytes);

        byte[] newEntriesBytes = new byte[newEntriesLength];
        newEntriesPointer.read(0, newEntriesBytes, 0, newEntriesLength);
        Map newEntries =
            Leb128Reader.deserializeMap(Uid32.class, EntryTableValue.class, newEntriesBytes);

        byte[] newChainsBytes = new byte[newChainsLength];
        newChainsPointer.read(0, newChainsBytes, 0, newChainsLength);
        Map newChains =
            Leb128Reader.deserializeMap(Uid32.class, ChainTableValue.class, newChainsBytes);

        this.update.update(removedChains, newEntries, newChains);
        return 0;
    }

}