Examples with GraphDatabase org.neo4j.android.client.GraphDatabase used on opensource projects

Example 11 with GraphDatabase

use of org.neo4j.android.client.GraphDatabase in project neo4j-mobile-android by neo4j-contrib.

the class RootNodeActivity method updateNodesList.

private void updateNodesList() {
    try {
        referenceNodeLayout.removeAllViews();
        rootNodesLayout.removeAllViews();
        cycleNodesLayout.removeAllViews();
        GraphDatabase database = dbManager.getCurrentNeo4jDatabase();
        database.beginTx();
        try {
            ParcelableNode referenceNode = database.getReferenceNode();
            addNodeListItem(referenceNodeLayout, referenceNode);
            List<ParcelableNode> rootNodes = new ArrayList<ParcelableNode>();
            NodeIterator nodeIterator = database.getAllNodes();
            while (nodeIterator.hasNext()) {
                ParcelableNode node = nodeIterator.next();
                if (!node.hasRelationship(Direction.INCOMING)) {
                    rootNodes.add(node);
                }
            }
            for (ParcelableNode rootNode : rootNodes) {
                addNodeListItem(rootNodesLayout, rootNode);
            }
        // TODO: [eRiC] what happens if all graphs are circular? ->
        // pick
        // one node per graph:
        } finally {
            database.txFinish();
        }
    } catch (Exception e) {
        Ln.e(e, "database exception");
        showErrorDialog();
    }
}

Example 12 with GraphDatabase

use of org.neo4j.android.client.GraphDatabase in project neo4j-mobile-android by neo4j-contrib.

the class RootNodeActivity method retrieveReferenceNodeId.

private void retrieveReferenceNodeId() {
    try {
        GraphDatabase database = dbManager.getCurrentNeo4jDatabase();
        database.beginTx();
        try {
            ParcelableNode referenceNode = database.getReferenceNode();
            referenceNodeId = referenceNode.getId();
        } finally {
            database.txFinish();
        }
    } catch (Exception e) {
        Ln.e(e, "database exception");
        showErrorDialog();
    }
}

Example 13 with GraphDatabase

use of org.neo4j.android.client.GraphDatabase in project neo4j-mobile-android by neo4j-contrib.

the class RootNodeActivity method createNode.

private void createNode(boolean createDefaultRelationship) throws RemoteException, Neo4jServiceException {
    GraphDatabase database = dbManager.getCurrentNeo4jDatabase();
    database.beginTx();
    try {
        ParcelableNode node = new ParcelableNode();
        long nodeId = database.createNode(node);
        Ln.i("created node '" + node + "' with id '" + nodeId + "'");
        if (createDefaultRelationship) {
            ParcelableRelationship relationship = new ParcelableRelationship();
            relationship.setStartNodeId(referenceNodeId);
            relationship.setEndNodeId(nodeId);
            relationship.setName(defaultRelationshipName);
            long relationshipId = database.createRelationship(relationship);
            Ln.i("created relationship '" + relationship + "' with id '" + relationshipId + "'");
        }
        database.txSuccess();
    } finally {
        database.txFinish();
    }
}

Example 14 with GraphDatabase

use of org.neo4j.android.client.GraphDatabase in project neo4j-mobile-android by neo4j-contrib.

the class NodeActivity method updateNodesList.

private void updateNodesList() {
    try {
        nodeRelationshipsLayout.removeAllViews();
        GraphDatabase database = dbManager.getCurrentNeo4jDatabase();
        database.beginTx();
        try {
            ParcelableNode centerNode = database.getNodeById(centerNodeId);
            List<ParcelableRelationship> relationships = centerNode.getRelationships();
            final Set<Long> pointingToCenterNodeNodeIds = new TreeSet<Long>();
            Set<ParcelableNode> peerNodes = new TreeSet<ParcelableNode>(new Comparator<ParcelableNode>() {

                @Override
                public int compare(ParcelableNode firstNode, ParcelableNode secondNode) {
                    if (firstNode.getId() < secondNode.getId()) {
                        return -1;
                    } else if (firstNode.getId() > secondNode.getId()) {
                        return 1;
                    } else {
                        return 0;
                    }
                }
            });
            int loopRelationshipsCount = 0;
            String lastLoopRelationshipName = "";
            for (ParcelableRelationship relationship : relationships) {
                if (relationship.getStartNodeId() == relationship.getEndNodeId()) {
                    loopRelationshipsCount++;
                    lastLoopRelationshipName = relationship.getName();
                } else {
                    if (centerNodeId == relationship.getStartNodeId()) {
                        peerNodes.add(database.getNodeById(relationship.getEndNodeId()));
                    } else {
                        pointingToCenterNodeNodeIds.add(relationship.getStartNodeId());
                        peerNodes.add(database.getNodeById(relationship.getStartNodeId()));
                    }
                }
            }
            nodeCenterButton.setText("" + centerNodeId);
            nodeCenterButton.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    if (pointingToCenterNodeNodeIds.isEmpty()) {
                    // do nothing.
                    } else if (pointingToCenterNodeNodeIds.size() == 1) {
                        showNodeActivity(pointingToCenterNodeNodeIds.iterator().next(), true);
                    } else {
                        showRelatedStartNodes(pointingToCenterNodeNodeIds);
                    }
                }
            });
            String text = getResources().getString(R.string.node_relationships_loop_button);
            if (loopRelationshipsCount == 0) {
                nodeLoopRelationshipsButton.setText(text);
            } else if (loopRelationshipsCount == 1) {
                nodeLoopRelationshipsButton.setText(text + "\n" + lastLoopRelationshipName);
            } else {
                nodeLoopRelationshipsButton.setText(text + "\n# " + loopRelationshipsCount);
            }
            nodeLoopRelationshipsButton.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    showRelationshipActivity(centerNodeId, centerNodeId);
                }
            });
            for (ParcelableNode peerNode : peerNodes) {
                addNodeRelationshipsListItem(peerNode);
            }
        } finally {
            database.txFinish();
        }
    } catch (Exception e) {
        Ln.e(e, "database exception");
        showErrorDialog();
    }
}

Example 15 with GraphDatabase

use of org.neo4j.android.client.GraphDatabase in project neo4j-mobile-android by neo4j-contrib.

the class NodePropertiesActivity method createProperty.

private void createProperty(String key, String value) {
    try {
        GraphDatabase database = dbManager.getCurrentNeo4jDatabase();
        database.beginTx();
        try {
            ParcelableNode node = database.getNodeById(nodeId);
            if (!node.hasProperty(key)) {
                node.setProperty(key, value);
                database.updateNode(node);
                database.txSuccess();
            } else {
                showPropertyAlreadyExistsError(key, value);
            }
        } finally {
            database.txFinish();
        }
    } catch (Exception e) {
        Ln.e(e, "failed to create new property with key '" + key + "' and value '" + value + "' on node with id '" + nodeId + "'.");
        showErrorDialog();
    }
    updateNodePropertiesList();
}