Spring Boot QueryDSL BooleanExpression - "OR" condition depending on the value in table - spring-boot

Question

I use Spring Boot and QueryDSL to combine a sql query and predicate. The problem is that I have to create a predicate to fetch data from table based on email BUT:
email can be in Freight.sender.email
OR in Freight.message.senderAddress
where Freight, Message, Sender are of course tables.
In table Freight we can have empty sender_id or message_id and depending on this I have to fetch rows by email from Freight.sender.email OR Freight.message.senderAddress (if Freight.sender is null)
Is it possible to create such a predicate that compares email from request query param with Freight.sender.email and only if Freight.sender.email doesn't exist, then my predicate shold search email in Freight.message.senderAddress
public Predicate build(Map<String, String> filters) {
return new OptionalBooleanBuilder(Expressions.asBoolean(true).isTrue())
.notNullAnd(qFreight.loadingAddress::containsIgnoreCase, filters.get(LOADING_ADDRESS))
.notNullAnd(qFreight.unloadingAddress::containsIgnoreCase, filters.get(UNLOADING_ADDRESS))
.notNullAnd(qFreight.loadingDate.eq(filters.get(LOADING_DATE) != null ? LocalDate.parse(filters.get(LOADING_DATE)) : now()), filters.get(LOADING_DATE))
.notNullAnd(qFreight.unloadingDate.eq(filters.get(UNLOADING_DATE) != null ? LocalDate.parse(filters.get(UNLOADING_DATE)) : now()), filters.get(UNLOADING_DATE))
//MY ATTEMPT - NOT WORKING:
.notNullAnd(qFreight.sender.email.eq(filters.get(SENDER_EMAIL)).or(qFreight.emailMessage.senderAddress.eq(SENDER_EMAIL)), filters.get(SENDER_EMAIL))
.build();
}
public class OptionalBooleanBuilder {
private BooleanExpression predicate;
public OptionalBooleanBuilder(BooleanExpression predicate) {
this.predicate = predicate;
}
public <T> OptionalBooleanBuilder notNullAnd(Function<T, BooleanExpression> expressionFunction, T value) {
if (nonNull(value)) {
return new OptionalBooleanBuilder(predicate.and(expressionFunction.apply(value)));
}
return this;
}
public BooleanExpression build() {
return predicate;
}
public <T>OptionalBooleanBuilder notNullAnd(BooleanExpression expression, T value) {
if(nonNull(value)){
return new OptionalBooleanBuilder(predicate.and(expression));
}
return this;
}
}
UPDATE
After suggestion from:
private Predicate addPredicate(OptionalBooleanBuilder builder, String email) {
if (nonNull(email)) {
return builder.notNullAnd(qFreight.sender.email.coalesce(qFreight.emailMessage.senderAddress.eq(email)).asBoolean(), email).build();
return builder.build();
}
I get error:
antlr.NoViableAltException: unexpected AST node: (
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:2169) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final]
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:2089) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final]
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.whereClause(HqlSqlBaseWalker.java:827) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final]
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:621) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final]
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:325) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final]
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:273) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final]
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:276) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final]
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:192) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final]
2020-12-24 00:45:35.535 ERROR 16068 --- [nio-9090-exec-8] p.a.m.s.filter.JwtAuthorizationFilter : Request processing failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected AST node: ( near line 3, column 52 [select freight
from pl.appwise.mtf.freight.domain.model.Freight freight
where ?1 = ?1 and freight.user.id = ?2 and coalesce(freight.sender.email, freight.emailMessage.senderAddress = ?3)
order by freight.loadingDate desc]; nested exception is java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected AST node: ( near line 3, column 52 [select freight
from pl.appwise.mtf.freight.domain.model.Freight freight
where ?1 = ?1 and freight.user.id = ?2 and coalesce(freight.sender.email, freight.emailMessage.senderAddress = ?3)
order by freight.loadingDate desc]
2020-12-24 00:45:37.906 INFO 16068 --- [ scheduling-1] ilAccoun

Answer 1

Use Freight.sender.email.coalesce(Freight.message.senderAddress). Freight.message.senderAddress will be NULL if Freight.message is NULL. For optional associations left outer joins are used by default, so this should cause no issue. Otherwise, explicitly use a left join yourself.