LdbcQuery14.java

package com.ldbc.driver.workloads.ldbc.snb.interactive;

import com.google.common.base.Function;
import com.google.common.collect.Iterables;
import com.ldbc.driver.Operation;
import com.ldbc.driver.SerializingMarshallingException;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.type.TypeReference;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import static java.lang.String.format;

public class LdbcQuery14 extends Operation<List<LdbcQuery14Result>>
{
    private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();

    public static final int TYPE = 14;
    private final long person1Id;
    private final long person2Id;

    public LdbcQuery14( long person1Id, long person2Id )
    {
        this.person1Id = person1Id;
        this.person2Id = person2Id;
    }

    public long person1Id()
    {
        return person1Id;
    }

    public long person2Id()
    {
        return person2Id;
    }

    @Override
    public boolean equals( Object o )
    {
        if ( this == o )
        { return true; }
        if ( o == null || getClass() != o.getClass() )
        { return false; }

        LdbcQuery14 that = (LdbcQuery14) o;

        if ( person1Id != that.person1Id )
        { return false; }
        if ( person2Id != that.person2Id )
        { return false; }

        return true;
    }

    @Override
    public int hashCode()
    {
        int result = (int) (person1Id ^ (person1Id >>> 32));
        result = 31 * result + (int) (person2Id ^ (person2Id >>> 32));
        return result;
    }

    @Override
    public String toString()
    {
        return "LdbcQuery14{" +
               "person1Id=" + person1Id +
               ", person2Id=" + person2Id +
               '}';
    }

    @Override
    public List<LdbcQuery14Result> marshalResult( String serializedResults ) throws SerializingMarshallingException
    {
        List<List<Object>> resultsAsList;
        try
        {
            resultsAsList = OBJECT_MAPPER.readValue(
                    serializedResults,
                    new TypeReference<List<List<Object>>>()
                    {
                    }
            );
        }
        catch ( IOException e )
        {
            throw new SerializingMarshallingException(
                    format( "Error while parsing serialized results\n%s", serializedResults ), e );
        }

        List<LdbcQuery14Result> results = new ArrayList<>();
        for ( int i = 0; i < resultsAsList.size(); i++ )
        {
            List<Object> resultAsList = resultsAsList.get( i );
            Iterable<Long> personsIdsInPath =
                    Iterables.transform( (List<Number>) resultAsList.get( 0 ), new Function<Number,Long>()
                    {
                        @Override
                        public Long apply( Number number )
                        {
                            return number.longValue();
                        }
                    } );
            double pathWeight = ((Number) resultAsList.get( 1 )).doubleValue();

            results.add(
                    new LdbcQuery14Result(
                            personsIdsInPath,
                            pathWeight
                    )
            );
        }
        return results;
    }

    @Override
    public String serializeResult( Object resultsObject ) throws SerializingMarshallingException
    {
        List<LdbcQuery14Result> results = (List<LdbcQuery14Result>) resultsObject;
        List<List<Object>> resultsFields = new ArrayList<>();
        for ( int i = 0; i < results.size(); i++ )
        {
            LdbcQuery14Result result = results.get( i );
            List<Object> resultFields = new ArrayList<>();
            resultFields.add( result.personsIdsInPath() );
            resultFields.add( result.pathWeight() );
            resultsFields.add( resultFields );
        }

        try
        {
            return OBJECT_MAPPER.writeValueAsString( resultsFields );
        }
        catch ( IOException e )
        {
            throw new SerializingMarshallingException(
                    format( "Error while trying to serialize result\n%s", results.toString() ), e );
        }
    }

    @Override
    public int type()
    {
        return TYPE;
    }
}