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/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.elasticsearch.action.admin.indices.get;

import com.carrotsearch.hppc.cursors.ObjectObjectCursor;
import org.elasticsearch.action.ActionResponse;
import org.elasticsearch.cluster.metadata.AliasMetaData;
import org.elasticsearch.cluster.metadata.MappingMetaData;
import org.elasticsearch.common.collect.ImmutableOpenMap;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.settings.Settings;

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

/**
 * A response for a delete index action.
 */
public class GetIndexResponse extends ActionResponse {

    private ImmutableOpenMap> mappings = ImmutableOpenMap.of();
    private ImmutableOpenMap> aliases = ImmutableOpenMap.of();
    private ImmutableOpenMap settings = ImmutableOpenMap.of();
    private String[] indices;

    GetIndexResponse(String[] indices,
            ImmutableOpenMap> mappings,
            ImmutableOpenMap> aliases, ImmutableOpenMap settings) {
        this.indices = indices;
        if (mappings != null) {
            this.mappings = mappings;
        }
        if (aliases != null) {
            this.aliases = aliases;
        }
        if (settings != null) {
            this.settings = settings;
        }
    }

    GetIndexResponse() {
    }

    public String[] indices() {
        return indices;
    }

    public String[] getIndices() {
        return indices();
    }

    public ImmutableOpenMap> mappings() {
        return mappings;
    }

    public ImmutableOpenMap> getMappings() {
        return mappings();
    }

    public ImmutableOpenMap> aliases() {
        return aliases;
    }

    public ImmutableOpenMap> getAliases() {
        return aliases();
    }

    public ImmutableOpenMap settings() {
        return settings;
    }

    public ImmutableOpenMap getSettings() {
        return settings();
    }

    @Override
    public void readFrom(StreamInput in) throws IOException {
        super.readFrom(in);
        this.indices = in.readStringArray();
        int mappingsSize = in.readVInt();
        ImmutableOpenMap.Builder> mappingsMapBuilder = ImmutableOpenMap.builder();
        for (int i = 0; i < mappingsSize; i++) {
            String key = in.readString();
            int valueSize = in.readVInt();
            ImmutableOpenMap.Builder mappingEntryBuilder = ImmutableOpenMap.builder();
            for (int j = 0; j < valueSize; j++) {
                mappingEntryBuilder.put(in.readString(), new MappingMetaData(in));
            }
            mappingsMapBuilder.put(key, mappingEntryBuilder.build());
        }
        mappings = mappingsMapBuilder.build();
        int aliasesSize = in.readVInt();
        ImmutableOpenMap.Builder> aliasesMapBuilder = ImmutableOpenMap.builder();
        for (int i = 0; i < aliasesSize; i++) {
            String key = in.readString();
            int valueSize = in.readVInt();
            List aliasEntryBuilder = new ArrayList<>();
            for (int j = 0; j < valueSize; j++) {
                aliasEntryBuilder.add(new AliasMetaData(in));
            }
            aliasesMapBuilder.put(key, Collections.unmodifiableList(aliasEntryBuilder));
        }
        aliases = aliasesMapBuilder.build();
        int settingsSize = in.readVInt();
        ImmutableOpenMap.Builder settingsMapBuilder = ImmutableOpenMap.builder();
        for (int i = 0; i < settingsSize; i++) {
            String key = in.readString();
            settingsMapBuilder.put(key, Settings.readSettingsFromStream(in));
        }
        settings = settingsMapBuilder.build();
    }

    @Override
    public void writeTo(StreamOutput out) throws IOException {
        super.writeTo(out);
        out.writeStringArray(indices);
        out.writeVInt(mappings.size());
        for (ObjectObjectCursor> indexEntry : mappings) {
            out.writeString(indexEntry.key);
            out.writeVInt(indexEntry.value.size());
            for (ObjectObjectCursor mappingEntry : indexEntry.value) {
                out.writeString(mappingEntry.key);
                mappingEntry.value.writeTo(out);
            }
        }
        out.writeVInt(aliases.size());
        for (ObjectObjectCursor> indexEntry : aliases) {
            out.writeString(indexEntry.key);
            out.writeVInt(indexEntry.value.size());
            for (AliasMetaData aliasEntry : indexEntry.value) {
                aliasEntry.writeTo(out);
            }
        }
        out.writeVInt(settings.size());
        for (ObjectObjectCursor indexEntry : settings) {
            out.writeString(indexEntry.key);
            Settings.writeSettingsToStream(indexEntry.value, out);
        }
    }
}