org.apache.hudi.secondary.index.SecondaryIndexUtils Maven / Gradle / Ivy
/*
* 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.hudi.secondary.index;
import org.apache.hudi.common.table.HoodieTableMetaClient;
import org.apache.hudi.common.util.Option;
import org.apache.hudi.exception.HoodieIndexException;
import org.apache.hudi.exception.HoodieSecondaryIndexException;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.util.List;
/**
* Utils for secondary index.
*/
public class SecondaryIndexUtils {
/**
* Get secondary index metadata for this table
*
* @param metaClient HoodieTableMetaClient
* @return HoodieSecondaryIndex List
*/
public static Option> getSecondaryIndexes(HoodieTableMetaClient metaClient) {
Option indexesMetadata = metaClient.getTableConfig().getSecondaryIndexesMetadata();
return indexesMetadata.map(SecondaryIndexUtils::fromJsonString);
}
/**
* Parse secondary index str to List
*
* @param jsonStr Secondary indexes with json format
* @return List
*/
public static List fromJsonString(String jsonStr) {
try {
return SecondaryIndexUtils.fromJsonString(jsonStr,
new TypeReference>() {
});
} catch (Exception e) {
throw new HoodieSecondaryIndexException("Fail to get secondary indexes", e);
}
}
public static String toJsonString(Object value) {
try {
return getObjectMapper().writeValueAsString(value);
} catch (JsonProcessingException e) {
throw new HoodieIndexException("Fail to convert object to json string", e);
}
}
public static T fromJsonString(String jsonStr, TypeReference type) throws Exception {
if (jsonStr == null || jsonStr.isEmpty()) {
return null;
}
return getObjectMapper().readValue(jsonStr, type);
}
public static ObjectMapper getObjectMapper() {
ObjectMapper mapper = new ObjectMapper();
mapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
mapper.setVisibility(PropertyAccessor.FIELD, JsonAutoDetect.Visibility.ANY);
return mapper;
}
}