Examples with ExistsExpression org.eclipse.persistence.jpa.jpql.parser.ExistsExpression used on opensource projects

Example 1 with ExistsExpression

use of org.eclipse.persistence.jpa.jpql.parser.ExistsExpression in project eclipselink by eclipse-ee4j.

the class ExpressionBuilderVisitor method visit.

@Override
public void visit(ExistsExpression expression) {
    // First create the subquery
    ReportQuery subquery = buildSubquery((SimpleSelectStatement) expression.getExpression());
    // representing the subquery. This make sure the FK joins get generated
    for (ReportItem item : subquery.getItems()) {
        Expression expr = item.getAttributeExpression();
        subquery.addNonFetchJoinedAttribute(expr);
    }
    subquery.clearItems();
    Expression one = new ConstantExpression(1, new ExpressionBuilder());
    subquery.addItem("one", one);
    subquery.dontUseDistinct();
    // Now create the EXISTS expression
    queryExpression = queryContext.getBaseExpression();
    if (expression.hasNot()) {
        queryExpression = queryExpression.notExists(subquery);
    } else {
        queryExpression = queryExpression.exists(subquery);
    }
    // Set the expression type
    type[0] = Boolean.class;
}

Example 2 with ExistsExpression

use of org.eclipse.persistence.jpa.jpql.parser.ExistsExpression in project eclipselink by eclipse-ee4j.

the class AbstractActualJPQLQueryFormatter method visit.

@Override
public void visit(ExistsExpressionStateObject stateObject) {
    if (stateObject.isDecorated()) {
        toText(stateObject);
    } else {
        ExistsExpression expression = stateObject.getExpression();
        // 'NOT'
        if (stateObject.hasNot()) {
            appendIdentifier((expression != null) ? expression.getActualNotIdentifier() : NOT, NOT);
            writer.append(SPACE);
        }
        // 'EXISTS'
        String actualIdentifier = (expression != null) ? expression.getActualIdentifier() : null;
        if ((actualIdentifier != null) && actualIdentifier.startsWith(NOT)) {
            actualIdentifier = actualIdentifier.substring(4);
        }
        appendIdentifier(actualIdentifier, EXISTS);
        // '('
        if (shouldOutput(expression) || expression.hasLeftParenthesis()) {
            writer.append(formatIdentifier(LEFT_PARENTHESIS));
        }
        // Subquery
        if (stateObject.hasStateObject()) {
            stateObject.getStateObject().accept(this);
        }
        // ')'
        if (shouldOutput(expression) || expression.hasRightParenthesis()) {
            writer.append(formatIdentifier(RIGHT_PARENTHESIS));
        }
    }
}