Examples with SetOperator org.hibernate.query.sqm.SetOperator used on opensource projects

Example 1 with SetOperator

use of org.hibernate.query.sqm.SetOperator in project hibernate-orm by hibernate.

the class SemanticQueryBuilder method visitSetQueryGroup.

@Override
public SqmQueryGroup<Object> visitSetQueryGroup(HqlParser.SetQueryGroupContext ctx) {
    if (creationOptions.useStrictJpaCompliance()) {
        throw new StrictJpaComplianceViolation(StrictJpaComplianceViolation.Type.SET_OPERATIONS);
    }
    final List<ParseTree> children = ctx.children;
    // noinspection unchecked
    final SqmQueryPart<Object> firstQueryPart = (SqmQueryPart<Object>) children.get(0).accept(this);
    SqmQueryGroup<Object> queryGroup;
    if (firstQueryPart instanceof SqmQueryGroup<?>) {
        queryGroup = (SqmQueryGroup<Object>) firstQueryPart;
    } else {
        queryGroup = new SqmQueryGroup<>(firstQueryPart);
    }
    setCurrentQueryPart(queryGroup);
    final int size = children.size();
    final SqmCreationProcessingState firstProcessingState = processingStateStack.pop();
    for (int i = 1; i < size; i += 2) {
        final SetOperator operator = visitSetOperator((HqlParser.SetOperatorContext) children.get(i));
        final HqlParser.OrderedQueryContext simpleQueryCtx = (HqlParser.OrderedQueryContext) children.get(i + 1);
        final List<SqmQueryPart<Object>> queryParts;
        if (queryGroup.getSetOperator() == null || queryGroup.getSetOperator() == operator) {
            queryGroup.setSetOperator(operator);
            queryParts = queryGroup.queryParts();
        } else {
            queryParts = new ArrayList<>(size - (i >> 1));
            queryParts.add(queryGroup);
            queryGroup = new SqmQueryGroup<>(creationContext.getNodeBuilder(), operator, queryParts);
            setCurrentQueryPart(queryGroup);
        }
        final SqmQueryPart<Object> queryPart;
        try {
            processingStateStack.push(new SqmQuerySpecCreationProcessingStateStandardImpl(processingStateStack.getCurrent(), (SqmSelectQuery<?>) firstProcessingState.getProcessingQuery(), this));
            final List<ParseTree> subChildren = simpleQueryCtx.children;
            if (subChildren.get(0) instanceof HqlParser.QueryContext) {
                final SqmQuerySpec<Object> querySpec = new SqmQuerySpec<>(creationContext.getNodeBuilder());
                queryParts.add(querySpec);
                visitQuerySpecExpression((HqlParser.QuerySpecExpressionContext) simpleQueryCtx);
            } else {
                try {
                    final SqmSelectStatement<Object> selectStatement = new SqmSelectStatement<>(creationContext.getNodeBuilder());
                    processingStateStack.push(new SqmQuerySpecCreationProcessingStateStandardImpl(processingStateStack.getCurrent(), selectStatement, this));
                    queryPart = visitNestedQueryExpression((HqlParser.NestedQueryExpressionContext) simpleQueryCtx);
                    queryParts.add(queryPart);
                } finally {
                    processingStateStack.pop();
                }
            }
        } finally {
            processingStateStack.pop();
        }
    }
    processingStateStack.push(firstProcessingState);
    return queryGroup;
}