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/*
 * Copyright (c) 2018. AxonIQ
 * Licensed 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 io.axoniq.axondb.client.axon;

import io.axoniq.axondb.QueryValue;
import io.axoniq.axondb.grpc.RowResponse;

import java.util.List;
import java.util.stream.Collectors;

/**
 * Single result row from a Query to the AxonDB.
 *
 * When applying aggregation functions in the query (min/max/groupby/count/avg) you will get values for the identifier.
 * Same identifier may occur more than once as the results get updated.
 * @author Marc Gathier
 */
public class QueryResult  {
    private final static QueryValue DEFAULT = QueryValue.newBuilder().build();
    private final RowResponse rowResponse;
    private final List columns;

    public QueryResult(RowResponse nextItem, List columns) {
        rowResponse = nextItem;
        this.columns = columns;
    }

    public Object get(String name) {
        return unwrap(rowResponse.getValuesOrDefault(name, DEFAULT));
    }

    public List getIdentifiers() {
        if(rowResponse.getIdValuesCount() == 0) return null;
        return rowResponse.getIdValuesList().stream().map(this::unwrap).collect(Collectors.toList());
    }

    public List getSortValues() {
        if(rowResponse.getSortValuesCount() == 0) return null;
        return rowResponse.getSortValuesList().stream().map(this::unwrap).collect(Collectors.toList());
    }

    public List getColumns() {
        return columns;
    }

    private Object unwrap(QueryValue value) {
        switch (value.getDataCase()) {
            case TEXT_VALUE:
                return value.getTextValue();
            case NUMBER_VALUE:
                return value.getNumberValue();
            case BOOLEAN_VALUE:
                return value.getBooleanValue();
            case DOUBLE_VALUE:
                return value.getDoubleValue();
            default:
                return null;
        }
    }

    public String toString() {
        return columns.stream().map(col -> col + "=" + get(col)).collect(Collectors.joining(","));
    }
}
    

    

    

            

    

            



    
    






    
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