| /* |
| * 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.drill.metastore.metadata; |
| |
| import com.fasterxml.jackson.annotation.JsonProperty; |
| import com.fasterxml.jackson.annotation.JsonTypeName; |
| import com.fasterxml.jackson.databind.annotation.JsonDeserialize; |
| import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder; |
| import org.apache.drill.metastore.components.tables.TableMetadataUnit; |
| |
| import java.util.Objects; |
| import java.util.StringJoiner; |
| |
| /** |
| * Class that specifies metadata type and metadata information |
| * which will be used for obtaining specific metadata from metastore. |
| * |
| * For example: |
| * <li>For table metadata: |
| * {@code MetadataInfo[MetadataType.TABLE, MetadataInfo.GENERAL_INFO_KEY, MetadataInfo.GENERAL_INFO_KEY]}</li> |
| * <li>For default segment metadata: |
| * {@code MetadataInfo[MetadataType.SEGMENT, MetadataInfo.DEFAULT_SEGMENT_KEY, MetadataInfo.DEFAULT_SEGMENT_KEY]}</li> |
| * <li>For top-level segment metadata: |
| * {@code MetadataInfo[MetadataType.SEGMENT, "1994", "1994"]}</li> |
| * <li>For nested segment metadata: |
| * {@code MetadataInfo[MetadataType.SEGMENT, "1994", "1994/Q1"]}</li> |
| * <li>For file metadata: |
| * {@code MetadataInfo[MetadataType.FILE, "1994", "1994/Q1/0_0_0.parquet"]}</li> |
| * <li>For row group metadata: |
| * {@code MetadataInfo[MetadataType.ROW_GROUP, "1994", "1994/Q1/0_0_0.parquet/1"]}</li> |
| * <li>For partition metadata: |
| * {@code MetadataInfo[MetadataType.PARTITION, "1994", "1994/Q1/01"]}</li> |
| */ |
| @JsonTypeName("metadataInfo") |
| @JsonDeserialize(builder = MetadataInfo.MetadataInfoBuilder.class) |
| public class MetadataInfo { |
| |
| public static final String GENERAL_INFO_KEY = "GENERAL_INFO"; |
| public static final String DEFAULT_SEGMENT_KEY = "DEFAULT_SEGMENT"; |
| public static final String DEFAULT_COLUMN_PREFIX = "_$SEGMENT_"; |
| |
| private static final String UNDEFINED_KEY = "UNDEFINED_KEY"; |
| |
| private final MetadataType type; |
| private final String key; |
| private final String identifier; |
| |
| private MetadataInfo(MetadataInfoBuilder builder) { |
| this.type = builder.type; |
| this.key = builder.key; |
| this.identifier = builder.identifier; |
| } |
| |
| @JsonProperty |
| public MetadataType type() { |
| return type; |
| } |
| |
| @JsonProperty |
| public String key() { |
| return key; |
| } |
| |
| @JsonProperty |
| public String identifier() { |
| return identifier; |
| } |
| |
| public void toMetadataUnitBuilder(TableMetadataUnit.Builder builder) { |
| builder.metadataType(type.name()); |
| builder.metadataKey(key); |
| builder.metadataIdentifier(identifier); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(type, key, identifier); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| MetadataInfo that = (MetadataInfo) o; |
| return type == that.type |
| && Objects.equals(key, that.key) |
| && Objects.equals(identifier, that.identifier); |
| } |
| |
| @Override |
| public String toString() { |
| return new StringJoiner(", ", MetadataInfo.class.getSimpleName() + "[", "]") |
| .add("type=" + type) |
| .add("key=" + key) |
| .add("identifier=" + identifier) |
| .toString(); |
| } |
| |
| public static MetadataInfoBuilder builder() { |
| return new MetadataInfoBuilder(); |
| } |
| |
| @JsonPOJOBuilder(withPrefix = "") |
| public static class MetadataInfoBuilder { |
| private MetadataType type; |
| private String key; |
| private String identifier; |
| |
| public MetadataInfoBuilder type(MetadataType type) { |
| this.type = type; |
| return this; |
| } |
| |
| public MetadataInfoBuilder key(String key) { |
| this.key = key; |
| return this; |
| } |
| |
| public MetadataInfoBuilder identifier(String identifier) { |
| this.identifier = identifier; |
| return this; |
| } |
| |
| public MetadataInfoBuilder metadataUnit(TableMetadataUnit unit) { |
| type(MetadataType.fromValue(unit.metadataType())); |
| key(unit.metadataKey()); |
| identifier(unit.metadataIdentifier()); |
| return this; |
| } |
| |
| public MetadataInfo build() { |
| Objects.requireNonNull(type, "type was not set"); |
| key = key == null ? UNDEFINED_KEY : key; |
| identifier = identifier == null ? key : identifier; |
| return new MetadataInfo(this); |
| } |
| } |
| } |