Examples of org.apache.jackrabbit.oak.spi.state.NodeBuilder

Package org.apache.jackrabbit.oak.spi.state

Examples of org.apache.jackrabbit.oak.spi.state.NodeBuilder

org.apache.jackrabbit.oak.spi.state.NodeBuilder
Builder interface for constructing new {@link NodeState node states}.
A node builder can be thought of as a mutable version of a node state. In addition to property and child node access methods like the ones that are already present in the NodeState interface, the {@code NodeBuilder}interface contains the following key methods:
- The {@code setProperty} and {@code removeProperty} methods formodifying properties
- The {@code getChildNode} method for accessing or modifying an existingsubtree
- The {@code setChildNode} and {@code removeChildNode} methods for adding,replacing or removing a subtree
- The {@code exists} method for checking whether the node represented bya builder exists or is accessible
- The {@code getNodeState} method for getting a frozen snapshot of themodified content tree
All the builders acquired from the same root builder instance are linked so that changes made through one instance automatically become visible in the other builders. For example:
```
 NodeBuilder rootBuilder = root.builder(); NodeBuilder fooBuilder = rootBuilder.getChildNode("foo"); NodeBuilder barBuilder = fooBuilder.getChildNode("bar"); assert !barBuilder.getBoolean("x"); fooBuilder.getChildNode("bar").setProperty("x", Boolean.TRUE); assert barBuilder.getBoolean("x"); assert barBuilder.exists(); fooBuilder.removeChildNode("bar"); assert !barBuilder.exists(); 
```
The {@code getNodeState} method returns a frozen, immutable snapshot of the currentstate of the builder. Providing such a snapshot can be somewhat expensive especially if there are many changes in the builder, so the method should generally only be used as the last step after all intended changes have been made. Meanwhile the accessors in the {@code NodeBuilder} interface can be used to provide efficient read access tothe current state of the tree being modified.
The node states constructed by a builder often retain an internal reference to the base state used by the builder. This allows common node state comparisons to perform really.


        if (id != null) {
            head = new AtomicReference<RecordId>(id);
            persistedHead = new AtomicReference<RecordId>(id);
        } else {
            NodeBuilder builder = EMPTY_NODE.builder();
            builder.setChildNode("root", initial);
            head = new AtomicReference<RecordId>(
                    getWriter().writeNode(builder.getNodeState()).getRecordId());
            persistedHead = new AtomicReference<RecordId>(null);
        }


        this.flushThread = new Thread(new Runnable() {
            @Override

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 * TODO document
 */
public class IndexUtils {


    public static NodeBuilder getOrCreateOakIndex(NodeBuilder root) {
        NodeBuilder index;
        if (!root.hasChildNode(INDEX_DEFINITIONS_NAME)) {
            index = root.child(INDEX_DEFINITIONS_NAME);
            // TODO: use property node type name
            index.setProperty(JCR_PRIMARYTYPE, NT_UNSTRUCTURED, NAME);
        } else {
            index = root.child(INDEX_DEFINITIONS_NAME);
        }
        return index;
    }

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                                                    @Nonnull String indexDefName,
                                                    boolean reindex,
                                                    boolean unique,
                                                    @Nonnull Collection<String> propertyNames,
                                                    @Nullable Collection<String> declaringNodeTypeNames) {
        NodeBuilder entry = index.child(indexDefName)
                .setProperty(JCR_PRIMARYTYPE, INDEX_DEFINITIONS_NODE_TYPE, NAME)
                .setProperty(TYPE_PROPERTY_NAME, PropertyIndexEditorProvider.TYPE)
                .setProperty(REINDEX_PROPERTY_NAME, reindex);
        if (unique) {
            entry.setProperty(UNIQUE_PROPERTY_NAME, unique);
        }
        entry.setProperty(PropertyStates.createProperty(PROPERTY_NAMES, propertyNames, NAMES));
        if (declaringNodeTypeNames != null && !declaringNodeTypeNames.isEmpty()) {
            entry.setProperty(PropertyStates.createProperty(DECLARING_NODE_TYPES, declaringNodeTypeNames, NAMES));
        }
        return entry;
    }

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        if(isAlreadyRunning(store)){
            log.debug("Async job found to be already running. Skipping");
            return;
        }


        NodeBuilder builder = store.getRoot().builder();
        NodeBuilder async = builder.child(ASYNC);


        NodeState before = null;
        final PropertyState state = async.getProperty(name);
        if (state != null && state.getType() == STRING) {
            before = store.retrieve(state.getValue(STRING));
        }
        if (before == null) {
            before = MISSING_NODE;
        }


        AsyncUpdateCallback callback = new AsyncUpdateCallback();
        IndexUpdate indexUpdate = new IndexUpdate(provider, name, after,
                builder, callback);


        CommitFailedException exception = EditorDiff.process(indexUpdate,
                before, after);
        if (exception == null && callback.dirty) {
            async.setProperty(name, checkpoint);
            try {
                store.merge(builder, new CommitHook() {
                    @Override @Nonnull
                    public NodeState processCommit(NodeState before,
                            NodeState after) throws CommitFailedException {

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            else {
                LOG.warn("Ignoring unknown conflict '" + conflictType + '\'');
            }
        }


        NodeBuilder conflictMarker = getConflictMarker(conflictType);
        if (conflictMarker != null) {
            assert conflictMarker.getChildNodeCount(1) == 0;
        }
    }

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        }
    }


    private void applyResolution(Resolution resolution, ConflictType conflictType, PropertyState ours) {
        String name = ours.getName();
        NodeBuilder conflictMarker = getConflictMarker(conflictType);
        if (resolution == Resolution.OURS) {
            if (DELETE_CHANGED_PROPERTY == conflictType) {
                target.removeProperty(name);
            }
            else {
                target.setProperty(ours);
            }


        }
        conflictMarker.removeProperty(name);
    }

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        }
        conflictMarker.removeProperty(name);
    }


    private void applyResolution(Resolution resolution, ConflictType conflictType, String name, NodeState ours) {
        NodeBuilder conflictMarker = getConflictMarker(conflictType);
        if (resolution == Resolution.OURS) {
            if (DELETE_CHANGED_NODE == conflictType) {
                removeChild(target, name);
            }
            else {
                addChild(target, name, ours);
            }
        }
        conflictMarker.getChildNode(name).remove();
    }

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        }
    }


    private static void preAsyncRun(NodeStore store, String name,
            AsyncIndexStats stats) throws CommitFailedException {
        NodeBuilder builder = store.getRoot().builder();
        preAsyncRunStatus(builder, stats);
        store.merge(builder, EmptyHook.INSTANCE, null);
    }

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    }


    private NodeBuilder getConflictMarker(ConflictType conflictType) {
        final String conflictName = conflictType.getName();
        if (target.hasChildNode(CONFLICT)) {
            NodeBuilder conflict = target.child(CONFLICT);
            if (conflict.hasChildNode(conflictName)) {
                return conflict.child(conflictName);
            }
        }


        return null;
    }

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    private Namespaces() {
    }


    public static void setupNamespaces(NodeBuilder system) {
        if (!system.hasChildNode(REP_NAMESPACES)) {
            NodeBuilder namespaces = createStandardMappings(system);
            buildIndexNode(namespaces); // index node for faster lookup
        }
    }

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