com.arakelian.elastic.model.Index Maven / Gradle / Ivy

Go to download
/*
 * 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 com.arakelian.elastic.model;

import java.io.IOException;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;

import org.immutables.value.Value;

import com.arakelian.elastic.Views.Elastic.Version7;
import com.arakelian.jackson.databind.ExcludeSerializer;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonPropertyOrder;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
import com.google.common.base.Preconditions;

@Value.Immutable(copy = false)
@JsonSerialize(as = ImmutableIndex.class)
@JsonDeserialize(builder = ImmutableIndex.Builder.class)
@JsonPropertyOrder({ "name", "settings", "mappings" })
public interface Index extends Serializable {
    public class MappingsDeserializer extends StdDeserializer {
        public MappingsDeserializer() {
            super(Map.class);
        }

        @Override
        public Map deserialize(final JsonParser p, final DeserializationContext ctxt)
                throws IOException, JsonProcessingException {
            final Class activeView = ctxt.getActiveView();
            if (Version7.class.isAssignableFrom(activeView)) {
                final HashMap mappings = new HashMap<>();
                final Mapping mapping = ctxt.readValue(p, Mapping.class);
                mappings.put("_default", mapping);
                return mappings;
            }

            // default deserialization
            return ctxt.readValue(
                    p,
                    ctxt.getTypeFactory().constructMapType(Map.class, String.class, Mapping.class));
        }
    }

    public static class MappingsSerializer extends StdSerializer {
        public MappingsSerializer() {
            super(Map.class);
        }

        @Override
        public void serialize(
                final Map mappings,
                final JsonGenerator generator,
                final SerializerProvider provider) throws IOException, JsonProcessingException {
            final Class activeView = provider.getActiveView();
            if (Version7.class.isAssignableFrom(activeView)) {
                final int size = mappings.size();
                final String key;
                if (size == 1) {
                    key = mappings.keySet().iterator().next().toString();
                } else if (size == 2) {
                    key = "_default_";
                } else {
                    throw new IllegalStateException("mappings constraint violated");
                }

                Preconditions.checkState(mappings.containsKey(key), "mappings does not contain %s", key);
                final Mapping value = (Mapping) mappings.get(key);
                provider.defaultSerializeValue(value, generator);
                return;
            }

            // default serialization
            provider.defaultSerializeValue(mappings, generator);
        }
    }

    public static class WithoutNameSerializer extends ExcludeSerializer {
        public WithoutNameSerializer(final JsonSerializer