org.apache.druid.query.topn.TopNResultValue.java Source code

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Here is the source code for org.apache.druid.query.topn.TopNResultValue.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.druid.query.topn;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonValue;
import com.google.common.base.Function;
import com.google.common.collect.Lists;
import org.apache.druid.java.util.common.IAE;

import javax.annotation.Nullable;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

/**
 */
public class TopNResultValue implements Iterable<DimensionAndMetricValueExtractor> {
    private final List<DimensionAndMetricValueExtractor> value;

    @JsonCreator
    public TopNResultValue(List<?> value) {
        this.value = (value == null) ? Lists.newArrayList()
                : Lists.transform(value, new Function<Object, DimensionAndMetricValueExtractor>() {
                    @Override
                    public DimensionAndMetricValueExtractor apply(@Nullable Object input) {
                        if (input instanceof Map) {
                            return new DimensionAndMetricValueExtractor((Map) input);
                        } else if (input instanceof DimensionAndMetricValueExtractor) {
                            return (DimensionAndMetricValueExtractor) input;
                        } else {
                            throw new IAE("Unknown type for input[%s]", input.getClass());
                        }
                    }
                });
    }

    @JsonValue
    public List<DimensionAndMetricValueExtractor> getValue() {
        return value;
    }

    @Override
    public Iterator<DimensionAndMetricValueExtractor> iterator() {
        return value.iterator();
    }

    @Override
    public String toString() {
        return "TopNResultValue{" + "value=" + value + '}';
    }

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

        TopNResultValue that = (TopNResultValue) o;

        if (value != null ? !value.equals(that.value) : that.value != null) {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode() {
        return value != null ? value.hashCode() : 0;
    }
}