Examples with PrefetchTreeNode org.apache.cayenne.query.PrefetchTreeNode used on opensource projects

Example 11 with PrefetchTreeNode

use of org.apache.cayenne.query.PrefetchTreeNode in project cayenne by apache.

the class ClientServerChannelQueryAction method singleObjectConversion.

private List<?> singleObjectConversion(List<?> serverObjects) {
    // must clone the list to ensure we do not mess up the server list that can be
    // used elsewhere (e.g. it can be cached).
    List<Object> clientObjects = new ArrayList<>(serverObjects.size());
    ObjectDetachOperation op = new ObjectDetachOperation(serverResolver.getClientEntityResolver());
    PrefetchTreeNode prefetchTree = serverMetadata.getPrefetchTree();
    for (Object serverObject : serverObjects) {
        clientObjects.add(convertSingleObject(prefetchTree, op, serverObject));
    }
    return clientObjects;
}

Example 12 with PrefetchTreeNode

use of org.apache.cayenne.query.PrefetchTreeNode in project cayenne by apache.

the class Compiler method compile.

CompiledExpression compile(String source, EJBQLExpression parsed) {
    parsed.visit(new CompilationVisitor());
    Map<EJBQLPath, Integer> pathsInSelect = new HashMap<>();
    for (int i = 0; i < parsed.getChildrenCount(); i++) {
        if (parsed.getChild(i) instanceof EJBQLSelectClause) {
            EJBQLExpression parsedTemp = parsed.getChild(i);
            boolean stop = false;
            while (parsedTemp.getChildrenCount() > 0 && !stop) {
                EJBQLExpression newParsedTemp = null;
                for (int j = 0; j < parsedTemp.getChildrenCount(); j++) {
                    if (parsedTemp.getChild(j) instanceof EJBQLSelectExpression) {
                        for (int k = 0; k < parsedTemp.getChild(j).getChildrenCount(); k++) {
                            if (parsedTemp.getChild(j).getChild(k) instanceof EJBQLPath) {
                                pathsInSelect.put((EJBQLPath) parsedTemp.getChild(j).getChild(k), j);
                            }
                        }
                    } else {
                        if (parsedTemp.getChild(j).getChildrenCount() == 0) {
                            stop = true;
                        } else {
                            newParsedTemp = parsedTemp.getChild(j);
                        }
                    }
                }
                if (!stop && newParsedTemp != null) {
                    parsedTemp = newParsedTemp;
                } else {
                    stop = true;
                }
            }
        }
    }
    // postprocess paths, now that all id vars are resolved
    if (paths != null) {
        for (EJBQLPath path : paths) {
            String id = normalizeIdPath(path.getId());
            ClassDescriptor descriptor = descriptorsById.get(id);
            if (descriptor == null) {
                throw new EJBQLException("Unmapped id variable: " + id);
            }
            StringBuilder buffer = new StringBuilder(id);
            ObjRelationship incoming = null;
            String pathRelationshipString = "";
            for (int i = 1; i < path.getChildrenCount(); i++) {
                String pathChunk = path.getChild(i).getText();
                if (pathChunk.endsWith(Entity.OUTER_JOIN_INDICATOR)) {
                    pathChunk = pathChunk.substring(0, pathChunk.length() - 1);
                }
                buffer.append('.').append(pathChunk);
                PropertyDescriptor property = descriptor.getProperty(pathChunk);
                if (property instanceof ArcProperty) {
                    incoming = ((ArcProperty) property).getRelationship();
                    descriptor = ((ArcProperty) property).getTargetDescriptor();
                    pathRelationshipString = buffer.substring(0, buffer.length());
                    descriptorsById.put(pathRelationshipString, descriptor);
                    incomingById.put(pathRelationshipString, incoming);
                }
            }
            if (pathsInSelect.size() > 0 && incoming != null && pathRelationshipString.length() > 0 && pathRelationshipString.equals(buffer.toString())) {
                EJBQLIdentifier ident = new EJBQLIdentifier(0);
                ident.text = pathRelationshipString;
                Integer integer = pathsInSelect.get(path);
                if (integer != null) {
                    resultComponents.remove(integer.intValue());
                    resultComponents.add(integer, ident);
                    rootId = pathRelationshipString;
                }
            }
        }
    }
    CompiledExpression compiled = new CompiledExpression();
    compiled.setExpression(parsed);
    compiled.setSource(source);
    compiled.setRootId(rootId);
    compiled.setDescriptorsById(descriptorsById);
    compiled.setIncomingById(incomingById);
    compiled.setPrefetchTree(prefetchTree);
    if (resultComponents != null) {
        SQLResult mapping = new SQLResult();
        for (int i = 0; i < resultComponents.size(); i++) {
            Object nextMapping = resultComponents.get(i);
            if (nextMapping instanceof String) {
                mapping.addColumnResult((String) nextMapping);
            } else if (nextMapping instanceof EJBQLExpression) {
                EntityResult compileEntityResult = compileEntityResult((EJBQLExpression) nextMapping, i);
                if (prefetchTree != null) {
                    for (PrefetchTreeNode prefetch : prefetchTree.getChildren()) {
                        if (((EJBQLExpression) nextMapping).getText().equals(prefetch.getEjbqlPathEntityId())) {
                            EJBQLIdentifier ident = new EJBQLIdentifier(0);
                            ident.text = prefetch.getEjbqlPathEntityId() + "." + prefetch.getPath();
                            compileEntityResult = compileEntityResultWithPrefetch(compileEntityResult, ident);
                        }
                    }
                }
                mapping.addEntityResult(compileEntityResult);
            }
        }
        compiled.setResult(mapping);
    }
    return compiled;
}