SqlIdCommentInjector.java

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.List;
import java.util.Properties;

import javax.annotation.PostConstruct;

import org.apache.ibatis.cache.CacheKey;
import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.MappedStatement.Builder;
import org.apache.ibatis.mapping.ParameterMapping;
import org.apache.ibatis.mapping.SqlSource;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.plugin.Intercepts;
import org.apache.ibatis.plugin.Invocation;
import org.apache.ibatis.plugin.Plugin;
import org.apache.ibatis.plugin.Signature;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.session.RowBounds;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.introspect.Annotated;
import com.fasterxml.jackson.databind.introspect.JacksonAnnotationIntrospector;

import lombok.extern.slf4j.Slf4j;

@Slf4j
@Intercepts ( 
			{ 
				@Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class})
				, @Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class, CacheKey.class, BoundSql.class})
			} 
		)
public class SqlIdCommentInjector implements Interceptor {

	public SqlIdCommentInjector() {
		init();
	}

	@PostConstruct
	public void init() {

		
	}

	@Override
	public Object intercept(Invocation invocation) throws Throwable {
		Object[] args = invocation.getArgs(); 
		MappedStatement ms = (MappedStatement)args[0];
		MappedStatement wrapped = copyFromMappedStatement(ms, new SqlSourceWrap(ms));
		args[0] = wrapped;
		
		return invocation.proceed();
	}

	private MappedStatement copyFromMappedStatement(MappedStatement ms, SqlSource newSqlSource) {
		Builder builder = new MappedStatement.Builder(ms.getConfiguration(), ms .getId(), newSqlSource, ms.getSqlCommandType());
		builder.resource(ms.getResource());
		builder.fetchSize(ms.getFetchSize());
		builder.statementType(ms.getStatementType());
		builder.keyGenerator(ms.getKeyGenerator());
		builder.timeout(ms.getTimeout());
		builder.parameterMap(ms.getParameterMap());
		builder.resultMaps(ms.getResultMaps());
		builder.resultSetType(ms.getResultSetType());
		builder.cache(ms.getCache());
		builder.flushCacheRequired(ms.isFlushCacheRequired());
		builder.useCache(ms.isUseCache());
		return builder.build();
	}

	private class SqlSourceWrap implements SqlSource {

		private final MappedStatement deletageMappedStatement;
		private final SqlSource delegateSqlSource;
		private final String id;

		public SqlSourceWrap(MappedStatement ms) {
			this.deletageMappedStatement = ms;
			this.delegateSqlSource = ms.getSqlSource();
			this.id = ms.getId();
		}

		@Override
		public BoundSql getBoundSql(Object parameterObject) {
			BoundSql origin = this.delegateSqlSource.getBoundSql(parameterObject);
			return new BoundSqlWrap(deletageMappedStatement.getConfiguration(), origin, id);
		}

		class BoundSqlWrap extends BoundSql {

			private final BoundSql delegate;
			private final String id;
			public BoundSqlWrap(Configuration conf, BoundSql boundSql, String id) {
				super(conf, boundSql.getSql(), boundSql.getParameterMappings(), boundSql.getParameterObject());
				this.delegate = boundSql;
				this.id = id;
			}

			public String getSql() {
				return  "/*" + id + "*/\r\n" + this.delegate.getSql();
			}

			public List<ParameterMapping> getParameterMappings() {
				return this.delegate.getParameterMappings();
			}

			public Object getParameterObject() {
				return this.delegate.getParameterObject();
			}

			public boolean hasAdditionalParameter(String name) {
				return this.delegate.hasAdditionalParameter(name);
			}

			public void setAdditionalParameter(String name, Object value) {
				this.delegate.setAdditionalParameter(name, value);
			}

			public Object getAdditionalParameter(String name) {
				return this.delegate.getAdditionalParameter(name);
			}

		}
	}

	@Override
	public Object plugin(Object target) {
		return Plugin.wrap(target, this);
	}

	@Override
	public void setProperties(Properties properties) {
		// nothing
	}

}