Examples with NodeReadTrx org.sirix.api.NodeReadTrx used on opensource projects

Example 1 with NodeReadTrx

use of org.sirix.api.NodeReadTrx in project sirix by sirixdb.

the class TextView method serialize.

/**
 * Serialize a tree.
 */
private void serialize() {
    final NodeReadTrx rtx = mRtx;
    // Style document.
    final StyledDocument doc = (StyledDocument) mText.getDocument();
    final Style styleElements = doc.addStyle("elements", null);
    StyleConstants.setForeground(styleElements, ELEMENT_COLOR);
    final Style styleNamespaces = doc.addStyle("attributes", null);
    StyleConstants.setForeground(styleNamespaces, NAMESPACE_COLOR);
    final Style styleAttributes = doc.addStyle("attributes", null);
    StyleConstants.setForeground(styleAttributes, ATTRIBUTE_COLOR);
    final Style styleText = doc.addStyle("text", null);
    StyleConstants.setForeground(styleText, TEXT_COLOR);
    final long nodeKey = rtx.getNodeKey();
    try {
        switch(rtx.getKind()) {
            case DOCUMENT:
            case ELEMENT:
                mText.setText("");
                if (mAxis == null) {
                    mSerializer = new StAXSerializer(rtx);
                } else {
                    mSerializer = new StAXDiffSerializer(new DiffAxis(IncludeSelf.YES, mDb.getSession().beginNodeReadTrx(mDb.getCompareRevisionNumber()), rtx, mAxis));
                }
                processStAX(State.INITIAL);
                break;
            case TEXT:
                rtx.moveTo(nodeKey);
                mText.setText("");
                doc.insertString(doc.getLength(), new String(rtx.getRawValue()), styleText);
                break;
            case NAMESPACE:
                // Move transaction to parent of given namespace node.
                rtx.moveToParent();
                mText.setText("");
                final long nNodeKey = rtx.getNodeKey();
                for (int i = 0, namespCount = rtx.getNamespaceCount(); i < namespCount; i++) {
                    rtx.moveToNamespace(i);
                    if (rtx.getNodeKey() == nodeKey) {
                        break;
                    }
                    rtx.moveTo(nNodeKey);
                }
                if (rtx.nameForKey(rtx.getPrefixKey()).length() == 0) {
                    doc.insertString(doc.getLength(), new StringBuilder().append("xmlns='").append(rtx.nameForKey(rtx.getURIKey())).append("'").toString(), styleNamespaces);
                } else {
                    doc.insertString(doc.getLength(), new StringBuilder().append("xmlns:").append(rtx.nameForKey(rtx.getPrefixKey())).append("='").append(rtx.nameForKey(rtx.getURIKey())).append("'").toString(), styleNamespaces);
                }
                break;
            case ATTRIBUTE:
                // Move transaction to parent of given attribute node.
                rtx.moveToParent();
                mText.setText("");
                final long aNodeKey = rtx.getNodeKey();
                for (int i = 0, attsCount = rtx.getAttributeCount(); i < attsCount; i++) {
                    rtx.moveToAttribute(i);
                    if (rtx.getNodeKey() == nodeKey) {
                        break;
                    }
                    rtx.moveTo(aNodeKey);
                }
                // Display value.
                final String attPrefix = rtx.getName().getPrefix();
                final QNm attQName = rtx.getName();
                if (attPrefix == null || attPrefix.isEmpty()) {
                    doc.insertString(doc.getLength(), new StringBuilder().append(attQName.getLocalName()).append("='").append(rtx.getValue()).append("'").toString(), styleAttributes);
                } else {
                    doc.insertString(doc.getLength(), new StringBuilder().append(attPrefix).append(":").append(attQName.getLocalName()).append("='").append(rtx.getValue()).append("'").toString(), styleAttributes);
                }
                break;
            default:
                throw new IllegalStateException("Node kind not known!");
        }
    } catch (final SirixException | BadLocationException | XMLStreamException e) {
        LOGWRAPPER.error(e.getMessage(), e);
    }
}

Example 2 with NodeReadTrx

use of org.sirix.api.NodeReadTrx in project sirix by sirixdb.

the class DatabaseRepresentation method getLastRevision.

/**
 * This method reads the existing database, and offers the last revision id of
 * the database
 *
 * @param resourceName
 *          The name of the existing database.
 * @return The {@link OutputStream} containing the result
 * @throws WebApplicationException
 *           The Exception occurred.
 * @throws SirixException
 */
public long getLastRevision(final String resourceName) throws JaxRxException, SirixException {
    long lastRevision;
    if (WorkerHelper.checkExistingResource(mStoragePath, resourceName)) {
        Database database = Databases.openDatabase(mStoragePath);
        NodeReadTrx rtx = null;
        Session session = null;
        try {
            session = database.getSession(new SessionConfiguration.Builder(resourceName).build());
            lastRevision = session.getMostRecentRevisionNumber();
        } catch (final Exception globExcep) {
            throw new JaxRxException(globExcep);
        } finally {
            WorkerHelper.closeRTX(rtx, session, database);
        }
    } else {
        throw new JaxRxException(404, "Resource not found");
    }
    return lastRevision;
}

Example 3 with NodeReadTrx

use of org.sirix.api.NodeReadTrx in project sirix by sirixdb.

the class NodeIdRepresentation method serializeAT.

/**
 * This method serializes requested resource with an access type.
 *
 * @param resource
 *          The requested resource
 * @param nodeId
 *          The node id of the requested resource.
 * @param revision
 *          The revision of the requested resource.
 * @param doNodeId
 *          Specifies whether the node id's have to be shown in the result.
 * @param output
 *          The output stream to be written.
 * @param wrapResult
 *          Specifies whether the result has to be wrapped with a result
 *          element.
 * @param accessType
 *          The {@link IDAccessType} which indicates the access to a special
 *          node.
 */
private void serializeAT(final String resource, final long nodeId, final Integer revision, final boolean doNodeId, final OutputStream output, final boolean wrapResult, final IDAccessType accessType) {
    if (WorkerHelper.checkExistingResource(mStoragePath, resource)) {
        Session session = null;
        Database database = null;
        NodeReadTrx rtx = null;
        try {
            database = Databases.openDatabase(mStoragePath);
            session = database.getSession(new SessionConfiguration.Builder(resource).build());
            if (revision == null) {
                rtx = session.beginNodeReadTrx();
            } else {
                rtx = session.beginNodeReadTrx(revision);
            }
            if (rtx.moveTo(nodeId).hasMoved()) {
                switch(accessType) {
                    case FIRSTCHILD:
                        if (!rtx.moveToFirstChild().hasMoved())
                            throw new JaxRxException(404, NOTFOUND);
                        break;
                    case LASTCHILD:
                        if (rtx.moveToFirstChild().hasMoved()) {
                            long last = rtx.getNodeKey();
                            while (rtx.moveToRightSibling().hasMoved()) {
                                last = rtx.getNodeKey();
                            }
                            rtx.moveTo(last);
                        } else {
                            throw new JaxRxException(404, NOTFOUND);
                        }
                        break;
                    case RIGHTSIBLING:
                        if (!rtx.moveToRightSibling().hasMoved())
                            throw new JaxRxException(404, NOTFOUND);
                        break;
                    case LEFTSIBLING:
                        if (!rtx.moveToLeftSibling().hasMoved())
                            throw new JaxRxException(404, NOTFOUND);
                        break;
                    // nothing to do;
                    default:
                }
                if (wrapResult) {
                    output.write(BEGINRESULT);
                    final XMLSerializerProperties props = new XMLSerializerProperties();
                    final XMLSerializerBuilder builder = new XMLSerializerBuilder(session, rtx.getNodeKey(), output, props);
                    if (doNodeId) {
                        builder.emitRESTful().emitIDs();
                    }
                    final XMLSerializer serializer = builder.build();
                    serializer.call();
                    output.write(ENDRESULT);
                } else {
                    final XMLSerializerProperties props = new XMLSerializerProperties();
                    final XMLSerializerBuilder builder = new XMLSerializerBuilder(session, rtx.getNodeKey(), output, props);
                    if (doNodeId) {
                        builder.emitRESTful().emitIDs();
                    }
                    final XMLSerializer serializer = builder.build();
                    serializer.call();
                }
            } else {
                throw new JaxRxException(404, NOTFOUND);
            }
        } catch (final SirixException ttExcep) {
            throw new JaxRxException(ttExcep);
        } catch (final IOException ioExcep) {
            throw new JaxRxException(ioExcep);
        } catch (final Exception globExcep) {
            if (globExcep instanceof JaxRxException) {
                // types
                throw (JaxRxException) globExcep;
            } else {
                throw new JaxRxException(globExcep);
            }
        } finally {
            try {
                WorkerHelper.closeRTX(rtx, session, database);
            } catch (final SirixException exce) {
                throw new JaxRxException(exce);
            }
        }
    } else {
        throw new JaxRxException(404, "Resource does not exist");
    }
}

Example 4 with NodeReadTrx

use of org.sirix.api.NodeReadTrx in project sirix by sirixdb.

the class DocumentWrapper method selectID.

@Override
public NodeInfo selectID(final String ID, final boolean getParent) {
    try {
        final NodeReadTrx rtx = mSession.beginNodeReadTrx();
        final Axis axis = new DescendantAxis(rtx, IncludeSelf.YES);
        while (axis.hasNext()) {
            if (rtx.getKind() == Kind.ELEMENT) {
                final int attCount = rtx.getAttributeCount();
                if (attCount > 0) {
                    final long nodeKey = rtx.getNodeKey();
                    for (int index = 0; index < attCount; index++) {
                        rtx.moveToAttribute(index);
                        if ("xml:id".equalsIgnoreCase(rtx.getName().getLocalName()) && ID.equals(rtx.getValue())) {
                            if (getParent) {
                                rtx.moveToParent();
                            }
                            return new NodeWrapper(this, rtx.getNodeKey());
                        }
                        rtx.moveTo(nodeKey);
                    }
                }
            }
            axis.next();
        }
        rtx.close();
    } catch (final SirixException e) {
        LOGWRAPPER.error(e.getMessage(), e);
    }
    return null;
}

Example 5 with NodeReadTrx

use of org.sirix.api.NodeReadTrx in project sirix by sirixdb.

the class NodeWrapper method getParent.

@Override
public NodeInfo getParent() {
    try {
        NodeInfo parent = null;
        final NodeReadTrx rtx = createRtxAndMove();
        if (rtx.hasParent()) {
            // Parent transaction.
            parent = new NodeWrapper(mDocWrapper, rtx.getParentKey());
        }
        rtx.close();
        return parent;
    } catch (final SirixException e) {
        LOGGER.error(e.getMessage(), e);
        return null;
    }
}