Examples of org.modeshape.jcr.query.model.Source

org.modeshape.jcr.query.model.Source
The source that represents a set of node tuples. The {@link Selector} and {@link Join} are the two concrete types of sources.

        assertThat(value.selectorName(), is(selectorName("tableA")));
    }


    @Test
    public void shouldParseReferenceValueFromStringWithMatchingSelectorNameIfSourceIsSelector() {
        Source source = new NamedSelector(selectorName("tableA"));
        ReferenceValue value = parser.parseReferenceValue(tokens("tableA)"), typeSystem, source);
        assertThat(value.getPropertyName(), is(nullValue()));
        assertThat(value.selectorName(), is(selectorName("tableA")));
    }

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        assertThat(value.selectorName(), is(selectorName("tableA")));
    }


    @Test
    public void shouldParseReferenceValueFromStringWithOnlySelectorNameIfSourceIsNotSelector() {
        Source source = mock(Join.class);
        ReferenceValue value = parser.parseReferenceValue(tokens("tableA)"), typeSystem, source);
        assertThat(value.getPropertyName(), is(nullValue()));
        assertThat(value.selectorName(), is(selectorName("tableA")));
    }

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    protected Query parseQuery( TokenStream tokens,
                                TypeSystem typeSystem ) {
        AtomicBoolean isDistinct = new AtomicBoolean(false);
        List<ColumnExpression> columnExpressions = parseSelect(tokens, isDistinct, typeSystem);
        Source source = parseFrom(tokens, typeSystem);
        Constraint constraint = parseWhere(tokens, typeSystem, source);
        // Parse the order by and limit (can be in any order) ...
        List<? extends Ordering> orderings = parseOrderBy(tokens, typeSystem, source);
        Limit limit = parseLimit(tokens);
        if (orderings == null) parseOrderBy(tokens, typeSystem, source);

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        return columns;
    }


    protected Source parseFrom( TokenStream tokens,
                                TypeSystem typeSystem ) {
        Source source = null;
        tokens.consume("FROM");
        source = parseNamedSelector(tokens, typeSystem);
        while (tokens.hasNext()) {
            JoinType joinType = null;
            if (tokens.canConsume("JOIN") || tokens.canConsume("INNER", "JOIN")) {

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        Query query = super.parseQuery(tokens, typeSystem);
        // See if we have to rewrite the JCR-SQL-style join ...
        if (query.source() instanceof JoinableSources) {
            JoinableSources joinableSources = (JoinableSources)query.source();
            // Rewrite the joins ...
            Source newSource = rewrite(joinableSources);
            query = new Query(newSource, query.constraint(), query.orderings(), query.columns(), query.getLimits(),
                              query.isDistinct());
        }
        return query;
    }

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     */
    @Override
    protected Source parseFrom( TokenStream tokens,
                                TypeSystem typeSystem ) {
        Position firstSourcePosition = tokens.nextPosition();
        Source source = super.parseFrom(tokens, typeSystem);
        if (tokens.matches(',') && source instanceof NamedSelector) {
            NamedSelector selector = (NamedSelector)source;
            JoinableSources joinedSources = new JoinableSources(selector, firstSourcePosition);
            while (tokens.canConsume(',')) {
                // This is a JCR-SQL-style JOIN ...

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            ListIterator<Join> iter = joins.listIterator();
            while (iter.hasNext()) {
                Join next = iter.next();
                Join replacement = null;
                if (usesSelector(next, selector1)) {
                    Source right = joinableSources.getSelectors().get(selector2.name());
                    replacement = new Join(next, JoinType.INNER, right, joinCondition);
                } else if (usesSelector(next, selector2)) {
                    Source left = joinableSources.getSelectors().get(selector1.name());
                    replacement = new Join(left, JoinType.INNER, next, joinCondition);
                }
                if (replacement != null) {
                    iter.previous();
                    iter.remove();
                    joins.add(replacement);
                    found = true;
                    break;
                }
            }
            if (!found) {
                // Nothing matched, so add a new join ...
                Source left = joinableSources.getSelectors().get(selector1.name());
                Source right = joinableSources.getSelectors().get(selector2.name());
                if (left == null) {
                    Position pos = joinableSources.getJoinCriteriaPosition();
                    String msg = JcrI18n.selectorUsedInEquiJoinCriteriaDoesNotExistInQuery.text(selector1.name(),
                                                                                                pos.getLine(),
                                                                                                pos.getColumn());

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        return null;
    }


    protected boolean usesSelector( Join join,
                                    SelectorName selector ) {
        Source left = join.getLeft();
        if (left instanceof Selector && selector.equals(((Selector)left).aliasOrName())) return true;
        if (left instanceof Join && usesSelector((Join)left, selector)) return true;
        Source right = join.getRight();
        if (right instanceof Selector && selector.equals(((Selector)right).aliasOrName())) return true;
        if (right instanceof Join && usesSelector((Join)right, selector)) return true;
        return false;
    }

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Related Classes of org.modeshape.jcr.query.model.Source

org.modeshape.jcr.query.parse.BasicSqlQueryParser

org.modeshape.jcr.query.parse.JcrSqlQueryParser

org.modeshape.jcr.query.parse.SqlQueryParserTest

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