Examples with ASTAppender org.hibernate.hql.internal.ast.util.ASTAppender used on opensource projects

Example 1 with ASTAppender

use of org.hibernate.hql.internal.ast.util.ASTAppender in project hibernate-orm by hibernate.

the class SelectClause method renderNonScalarSelects.

private void renderNonScalarSelects(SelectExpression[] selectExpressions, FromClause currentFromClause) throws SemanticException {
    ASTAppender appender = new ASTAppender(getASTFactory(), this);
    final int size = selectExpressions.length;
    int nonscalarSize = 0;
    for (int i = 0; i < size; i++) {
        if (!selectExpressions[i].isScalar()) {
            nonscalarSize++;
        }
    }
    int j = 0;
    for (int i = 0; i < size; i++) {
        if (!selectExpressions[i].isScalar()) {
            SelectExpression expr = selectExpressions[i];
            FromElement fromElement = expr.getFromElement();
            if (fromElement != null) {
                renderNonScalarIdentifiers(fromElement, nonscalarSize, j, expr, appender);
                j++;
            }
        }
    }
    if (!currentFromClause.isSubQuery()) {
        // Generate the property select tokens.
        int k = 0;
        for (int i = 0; i < size; i++) {
            if (!selectExpressions[i].isScalar()) {
                FromElement fromElement = selectExpressions[i].getFromElement();
                if (fromElement != null) {
                    renderNonScalarProperties(appender, selectExpressions[i], fromElement, nonscalarSize, k);
                    k++;
                }
            }
        }
    }
}

Example 2 with ASTAppender

use of org.hibernate.hql.internal.ast.util.ASTAppender in project hibernate-orm by hibernate.

the class SelectClause method initializeDerivedSelectClause.

/**
	 * Prepares a derived (i.e., not explicitly defined in the query) select clause.
	 *
	 * @param fromClause The from clause to which this select clause is linked.
	 */
public void initializeDerivedSelectClause(FromClause fromClause) throws SemanticException {
    if (prepared) {
        throw new IllegalStateException("SelectClause was already prepared!");
    }
    //Used to be tested by the TCK but the test is no longer here
    //		if ( getSessionFactoryHelper().isStrictJPAQLComplianceEnabled() && !getWalker().isSubQuery() ) {
    //			// NOTE : the isSubQuery() bit is a temporary hack...
    //			throw new QuerySyntaxException( "JPA-QL compliance requires select clause" );
    //		}
    List fromElements = fromClause.getProjectionList();
    // Get ready to start adding nodes.
    ASTAppender appender = new ASTAppender(getASTFactory(), this);
    int size = fromElements.size();
    ArrayList queryReturnTypeList = new ArrayList(size);
    Iterator iterator = fromElements.iterator();
    for (int k = 0; iterator.hasNext(); k++) {
        FromElement fromElement = (FromElement) iterator.next();
        Type type = fromElement.getSelectType();
        addCollectionFromElement(fromElement);
        if (type != null) {
            boolean collectionOfElements = fromElement.isCollectionOfValuesOrComponents();
            if (!collectionOfElements) {
                if (!fromElement.isFetch()) {
                    // Add the type to the list of returned sqlResultTypes.
                    queryReturnTypeList.add(type);
                }
                fromElementsForLoad.add(fromElement);
                // Generate the select expression.
                String text = fromElement.renderIdentifierSelect(size, k);
                SelectExpressionImpl generatedExpr = (SelectExpressionImpl) appender.append(SqlTokenTypes.SELECT_EXPR, text, false);
                if (generatedExpr != null) {
                    generatedExpr.setFromElement(fromElement);
                }
            }
        }
    }
    // Get all the select expressions (that we just generated) and render the select.
    SelectExpression[] selectExpressions = collectSelectExpressions();
    if (getWalker().isShallowQuery()) {
        renderScalarSelects(selectExpressions, fromClause);
    } else {
        renderNonScalarSelects(selectExpressions, fromClause);
    }
    finishInitialization(queryReturnTypeList);
}

Example 3 with ASTAppender

use of org.hibernate.hql.internal.ast.util.ASTAppender in project hibernate-orm by hibernate.

the class SelectClause method initializeExplicitSelectClause.

/**
	 * Prepares an explicitly defined select clause.
	 *
	 * @param fromClause The from clause linked to this select clause.
	 *
	 * @throws SemanticException indicates a semntic issue with the explicit select clause.
	 */
public void initializeExplicitSelectClause(FromClause fromClause) throws SemanticException {
    if (prepared) {
        throw new IllegalStateException("SelectClause was already prepared!");
    }
    //explicit = true;	// This is an explict Select.
    //ArrayList sqlResultTypeList = new ArrayList();
    ArrayList queryReturnTypeList = new ArrayList();
    // First, collect all of the select expressions.
    // NOTE: This must be done *beforeQuery* invoking setScalarColumnText() because setScalarColumnText()
    // changes the AST!!!
    SelectExpression[] selectExpressions = collectSelectExpressions();
    // we only support parameters in select in the case of INSERT...SELECT statements
    if (getParameterPositions().size() > 0 && getWalker().getStatementType() != HqlSqlTokenTypes.INSERT) {
        throw new QueryException("Parameters are only supported in SELECT clauses when used as part of a INSERT INTO DML statement");
    }
    for (SelectExpression selectExpression : selectExpressions) {
        if (AggregatedSelectExpression.class.isInstance(selectExpression)) {
            aggregatedSelectExpression = (AggregatedSelectExpression) selectExpression;
            queryReturnTypeList.addAll(aggregatedSelectExpression.getAggregatedSelectionTypeList());
            scalarSelect = true;
        } else {
            // we have no choice but to do this check here
            // this is not very elegant but the "right way" would most likely involve a bigger rewrite so as to
            // treat ParameterNodes in select clauses as SelectExpressions
            boolean inSubquery = selectExpression instanceof QueryNode && ((QueryNode) selectExpression).getFromClause().getParentFromClause() != null;
            if (getWalker().getStatementType() == HqlSqlTokenTypes.INSERT && inSubquery) {
                // we do not support parameters for subqueries in INSERT...SELECT
                if (((QueryNode) selectExpression).getSelectClause().getParameterPositions().size() > 0) {
                    throw new QueryException("Use of parameters in subqueries of INSERT INTO DML statements is not supported.");
                }
            }
            Type type = selectExpression.getDataType();
            if (type == null) {
                throw new QueryException("No data type for node: " + selectExpression.getClass().getName() + " " + new ASTPrinter(SqlTokenTypes.class).showAsString((AST) selectExpression, ""));
            }
            // If the data type is not an association type, it could not have been in the FROM clause.
            if (selectExpression.isScalar()) {
                scalarSelect = true;
            }
            if (isReturnableEntity(selectExpression)) {
                fromElementsForLoad.add(selectExpression.getFromElement());
            }
            // Always add the type to the return type list.
            queryReturnTypeList.add(type);
        }
    }
    //init the aliases, afterQuery initing the constructornode
    initAliases(selectExpressions);
    if (!getWalker().isShallowQuery()) {
        // add the fetched entities
        List fromElements = fromClause.getProjectionList();
        // Get ready to start adding nodes.
        ASTAppender appender = new ASTAppender(getASTFactory(), this);
        int size = fromElements.size();
        Iterator iterator = fromElements.iterator();
        for (int k = 0; iterator.hasNext(); k++) {
            FromElement fromElement = (FromElement) iterator.next();
            if (fromElement.isFetch()) {
                FromElement origin = null;
                if (fromElement.getRealOrigin() == null) {
                    // by FromElementFactory.createCollectionJoin()
                    if (fromElement.getOrigin() == null) {
                        throw new QueryException("Unable to determine origin of join fetch [" + fromElement.getDisplayText() + "]");
                    } else {
                        origin = fromElement.getOrigin();
                    }
                } else {
                    origin = fromElement.getRealOrigin();
                }
                if (!fromElementsForLoad.contains(origin) && // work around that fetch joins of element collections where their parent instead of the root is selected
                (!fromElement.isCollectionJoin() || !fromElementsForLoad.contains(fromElement.getFetchOrigin()))) {
                    throw new QueryException("query specified join fetching, but the owner " + "of the fetched association was not present in the select list " + "[" + fromElement.getDisplayText() + "]");
                }
                Type type = fromElement.getSelectType();
                addCollectionFromElement(fromElement);
                if (type != null) {
                    boolean collectionOfElements = fromElement.isCollectionOfValuesOrComponents();
                    if (!collectionOfElements) {
                        // Add the type to the list of returned sqlResultTypes.
                        fromElement.setIncludeSubclasses(true);
                        fromElementsForLoad.add(fromElement);
                        //sqlResultTypeList.add( type );
                        // Generate the select expression.
                        String text = fromElement.renderIdentifierSelect(size, k);
                        alreadyRenderedIdentifiers.add(text);
                        SelectExpressionImpl generatedExpr = (SelectExpressionImpl) appender.append(SqlTokenTypes.SELECT_EXPR, text, false);
                        if (generatedExpr != null) {
                            generatedExpr.setFromElement(fromElement);
                        }
                    }
                }
            }
        }
        // generate id select fragment and then property select fragment for
        // each expression, just like generateSelectFragments().
        renderNonScalarSelects(collectSelectExpressions(), fromClause);
    }
    if (scalarSelect || getWalker().isShallowQuery()) {
        // If there are any scalars (non-entities) selected, render the select column aliases.
        renderScalarSelects(selectExpressions, fromClause);
    }
    finishInitialization(/*sqlResultTypeList,*/
    queryReturnTypeList);
}