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

Example 1 with SubstringExpression

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

the class AbstractSemanticValidator method validateSubstringExpression.

/**
 * Validates the encapsulated expression of the given <code><b>SUBSTRING</b></code> expression.
 * The test to perform is:
 * <ul>
 * <li>If the encapsulated expression is a path expression, validation makes sure it is a basic
 * mapping, an association field is not allowed.</li>
 * <li>If the encapsulated expression is not a path expression, validation will be redirected to
 * that expression but the returned status will not be changed.</li>
 * </ul>
 *
 * @param expression The {@link SubstringExpression} to validate by validating its encapsulated expression
 * @return A number indicating the validation result. {@link #isValid(int, int)} can be used to
 * determine the validation status of an expression based on its position
 */
protected int validateSubstringExpression(SubstringExpression expression) {
    int result = 0;
    // Validate the first expression
    if (expression.hasFirstExpression()) {
        Expression firstExpression = expression.getFirstExpression();
        // Special case for state field path expression, association field is not allowed
        StateFieldPathExpression pathExpression = getStateFieldPathExpression(firstExpression);
        if (pathExpression != null) {
            boolean valid = validateStateFieldPathExpression(pathExpression, PathType.BASIC_FIELD_ONLY);
            updateStatus(result, 0, valid);
        } else {
            firstExpression.accept(this);
        }
    }
    // Validate the second expression
    expression.getSecondExpression().accept(this);
    // Validate the third expression
    expression.getThirdExpression().accept(this);
    return result;
}

Example 2 with SubstringExpression

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

the class ExpressionBuilderVisitor method visit.

@Override
public void visit(SubstringExpression expression) {
    // Create the first expression
    expression.getFirstExpression().accept(this);
    Expression firstExpression = queryExpression;
    // Create the second expression
    expression.getSecondExpression().accept(this);
    Expression secondExpression = queryExpression;
    // Create the third expression
    expression.getThirdExpression().accept(this);
    Expression thirdExpression = queryExpression;
    // Now create the SUBSTRING expression
    if (thirdExpression != null) {
        queryExpression = firstExpression.substring(secondExpression, thirdExpression);
    } else {
        queryExpression = firstExpression.substring(secondExpression);
    }
    // Set the expression type
    type[0] = String.class;
}

Example 3 with SubstringExpression

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

the class ReportItemBuilder method visit.

@Override
public void visit(SubstringExpression expression) {
    Expression queryExpression = queryContext.buildExpression(expression, type);
    addAttribute(ExpressionTools.EMPTY_STRING, queryExpression, type[0]);
}