Example usage for org.hibernate.hql.internal.ast.tree FromElement getTableAlias

Introduction

In this page you can find the example usage for org.hibernate.hql.internal.ast.tree FromElement getTableAlias.

Prototype

public String getTableAlias() 

Source Link

Usage

From source file:com.blazebit.persistence.integration.hibernate.base.HibernateExtendedQuerySupport.java

License:Apache License

@Override
public String getSqlAlias(EntityManager em, Query query, String alias) {
    SessionImplementor session = em.unwrap(SessionImplementor.class);
    HQLQueryPlan plan = getOriginalQueryPlan(session, query);
    if (plan.getTranslators().length > 1) {
        throw new IllegalArgumentException("No support for multiple translators yet!");
    }//from  w w w  . ja  v  a2 s . co m
    QueryTranslator translator = plan.getTranslators()[0];

    QueryNode queryNode = getField(translator, "sqlAst");
    FromElement fromElement = queryNode.getFromClause().getFromElement(alias);

    if (fromElement == null) {
        throw new IllegalArgumentException("The alias " + alias + " could not be found in the query: " + query);
    }

    return fromElement.getTableAlias();
}

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