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The official Couchbase Java SDK
There is a newer version: 3.7.6
/*
 * Copyright (c) 2019 Couchbase, Inc.
 *
 * 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 com.couchbase.client.java.query;

import com.couchbase.client.core.annotation.Stability;
import com.couchbase.client.core.api.query.CoreQueryResult;
import com.couchbase.client.core.error.DecodingFailureException;
import com.couchbase.client.java.codec.JsonSerializer;
import com.couchbase.client.java.codec.TypeRef;
import com.couchbase.client.java.json.JsonObject;

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

/**
 * The result of a N1QL query, including rows and associated metadata.
 *
 * @since 3.0.0
 */
public class QueryResult {
    /**
     * The default serializer to use.
     */
    private final JsonSerializer serializer;

    private final CoreQueryResult internal;

    /**
     * Creates a new QueryResult.
     */
    @Stability.Internal
    public QueryResult(final CoreQueryResult internal, final JsonSerializer serializer) {
        this.internal = internal;
        this.serializer = serializer;
    }

    /**
     * Returns all rows, converted into {@link JsonObject}s.
     *
     * @throws DecodingFailureException if any row could not be successfully deserialized.
     */
    public List rowsAsObject() {
        return rowsAs(JsonObject.class);
    }

    /**
     * Returns all rows, converted into instances of the target class.
     *
     * @param target the target class to deserialize into.
     * @throws DecodingFailureException if any row could not be successfully deserialized.
     */
    public  List rowsAs(final Class target) {
      return internal.rows()
        .map(row -> serializer.deserialize(target, row.data()))
        .collect(Collectors.toList());
    }

    /**
     * Returns all rows, converted into instances of the target type.
     *
     * @param target the target type to deserialize into.
     * @throws DecodingFailureException if any row could not be successfully deserialized.
     */
    public  List rowsAs(final TypeRef target) {
      return internal.rows()
        .map(row -> serializer.deserialize(target, row.data()))
        .collect(Collectors.toList());
    }

    /**
     * Returns the {@link QueryMetaData} giving access to the additional metadata associated with this query.
     */
    public QueryMetaData metaData() {
      return new QueryMetaData(internal.metaData());
    }
}