Examples of org.apache.openjpa.lib.rop.ResultObjectProvider

org.apache.openjpa.lib.rop.ResultObjectProvider
Interface that allows lazy/custom instantiation of input objects. {@link ResultList} objects do not necessarily load in data allat once. Instead, they may lazily load objects as necessary. So, the lifespan of a {@link ResultObjectProvider} instance isrelated to how the application deals with processing the {@link ResultList} created with a given{@link ResultObjectProvider} instance. @author Marc Prud'hommeaux @author Patrick Linskey @author Abe White

            return emptyResult(q, ex);


        // execute; if we have a result class or we have only one result
        // and so need to remove it from its array, wrap in a packing rop
        range.lrs = isLRS(range.start, range.end);
        ResultObjectProvider rop = ex.executeQuery(q, params, range);
        try {
            return toResult(q, ex, rop, range);
        } catch (Exception e) {
            if (rop != null)
                try { rop.close(); } catch (Exception e2) {}
            throw e;
        }
    }

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                new ResultObjectProvider[_executors.length];
            for (int i = 0; i < _executors.length; i++)
                rops[i] = _executors[i].executeQuery(q, params, ropRange);


            boolean[] asc = _executors[0].getAscending(q);
            ResultObjectProvider rop;
            if (asc.length == 0)
                rop = new MergedResultObjectProvider(rops);
            else
                rop = new OrderingMergedResultObjectProvider(rops, asc,
                    _executors, q, params);

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        if (jfetch.getSubclassFetchMode(mapping) != jfetch.EAGER_JOIN)
            rops = new ResultObjectProvider[mappings.length];


        try {
            // check for custom loads
            ResultObjectProvider rop;
            for (int i = 0; i < mappings.length; i++) {
                rop = mappings[i].customLoad(this, subclasses, jfetch, 0,
                    Long.MAX_VALUE);
                if (rop != null) {
                    if (rops == null)

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            SQLBuffer buf = new SQLBuffer(dict).append(sql);
            Connection conn = store.getConnection();
            JDBCFetchConfiguration fetch = (JDBCFetchConfiguration)
                q.getContext().getFetchConfiguration();


            ResultObjectProvider rop;
            PreparedStatement stmnt = null;
            try {
                // use the right method depending on sel vs. proc, lrs setting
                if (_select && !range.lrs)
                    stmnt = prepareStatement(conn, buf);

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                range.end);
            List<Object> cached = cq.checkCache(key);
            if (cached != null)
                return new ListResultObjectProvider(cached);


            ResultObjectProvider rop = _ex.executeQuery(cq.getDelegate(),
                params, range);
            if (_fc.getQueryCacheEnabled())
                return cq.wrapResult(rop, key);
            else
                return rop;

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            // apply projections, order results, and filter duplicates
            results = _factory.project(_exps[0], results, ctx, params);
            results = _factory.order(_exps[0], results, ctx, params);
            results = _factory.distinct(_exps[0], coll == null, results);


            ResultObjectProvider rop = new ListResultObjectProvider(results);
            if (range.start != 0 || range.end != Long.MAX_VALUE)
                rop = new RangeResultObjectProvider(rop, range.start,range.end);
            return rop;
        }

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            start = 0L;
        boolean lrs = range.lrs || (fetch.getFetchBatchSize() >= 0 
            && (start != range.start || end != range.end));


        ResultObjectProvider[] rops = null;
        ResultObjectProvider rop = null;
        if (unionable) {
            Union union = _store.getSQLFactory().newUnion(
                (Select[]) sels.toArray(new Select[sels.size()]));
            BitSet[] paged = populateUnion(union, mappings, subclasses, facts,
                exps, states, ctx, lrs, eager, start, end);

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                    paramMap.put(itr.next(), params[idx]);
            }


            FetchConfiguration fetch = q.getContext().getFetchConfiguration();
            StoreContext sctx = q.getContext().getStoreContext();
            ResultObjectProvider rop;
            Object[] args;
            if (_inMem) {
                args = new Object[]{ sctx, _meta, (_subs) ? Boolean.TRUE
                    : Boolean.FALSE, null, paramMap, fetch };

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                range.end);
            List<Object> cached = cq.checkCache(key);
            if (cached != null)
                return new ListResultObjectProvider(cached);


            ResultObjectProvider rop = _ex.executeQuery(cq.getDelegate(),
                params, range);
            if (_fc.getQueryCacheEnabled())
                return cq.wrapResult(rop, key);
            else
                return rop;

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        if (jfetch.getSubclassFetchMode(mapping) != jfetch.EAGER_JOIN)
            rops = new ResultObjectProvider[mappings.length];


        try {
            // check for custom loads
            ResultObjectProvider rop;
            for (int i = 0; i < mappings.length; i++) {
                rop = mappings[i].customLoad(this, subclasses, jfetch, 0,
                    Long.MAX_VALUE);
                if (rop != null) {
                    if (rops == null)

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Related Classes of org.apache.openjpa.lib.rop.ResultObjectProvider

org.apache.openjpa.datacache.QueryCacheStoreQuery$QueryCacheExecutor

org.apache.openjpa.jdbc.kernel.JDBCStoreManager

org.apache.openjpa.jdbc.kernel.JDBCStoreQuery

org.apache.openjpa.jdbc.kernel.PreparedSQLStoreQuery$PreparedSQLExecutor

org.apache.openjpa.jdbc.kernel.SQLStoreQuery$SQLExecutor

org.apache.openjpa.kernel.ExpressionStoreQuery$InMemoryExecutor

org.apache.openjpa.kernel.ExtentImpl

org.apache.openjpa.kernel.MethodStoreQuery$MethodExecutor

org.apache.openjpa.kernel.QueryImpl

org.apache.openjpa.kernel.QueryImpl$MergedExecutor

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