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

Example 11 with NodeReadTrx

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

the class StAXDiffSerializer method getElementText.

@Override
public String getElementText() throws XMLStreamException {
    final NodeReadTrx rtx = mAxis.getTransaction();
    final long nodeKey = rtx.getNodeKey();
    /*
		 * The cursor has to move back (once) after determining, that a closing tag
		 * would be the next event (precond: closeElement and either goBack or goUp
		 * is true).
		 */
    if (mCloseElements && mToLastKey) {
        rtx.moveTo(mLastKey);
    }
    if (mEvent.getEventType() != XMLStreamConstants.START_ELEMENT) {
        rtx.moveTo(nodeKey);
        throw new XMLStreamException("getElementText() only can be called on a start element");
    }
    final FilterAxis textFilterAxis = new FilterAxis(new DescendantAxis(rtx), new TextFilter(rtx));
    final StringBuilder strBuilder = new StringBuilder();
    while (textFilterAxis.hasNext()) {
        textFilterAxis.next();
        strBuilder.append(mAxis.getTransaction().getValue());
    }
    rtx.moveTo(nodeKey);
    return XMLToken.escapeContent(strBuilder.toString());
}

Example 12 with NodeReadTrx

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

the class StAXDiffSerializer method emit.

/**
 * Move to node and emit it.
 *
 * @param pRtx
 *          Read Transaction.
 * @throws IOException
 *           if any I/O error occurred
 */
private void emit(final NodeReadTrx pRtx) throws IOException {
    assert pRtx != null;
    // Emit pending update elements.
    if (!mUpdatedStack.isEmpty()) {
        mDiff = DiffType.UPDATED;
        final TransactionTuple tuple = mUpdatedStack.peek();
        final NodeReadTrx trx = tuple.getRtx();
        final long nodeKey = trx.getNodeKey();
        trx.moveTo(tuple.getKey());
        if (mFirstUpdate && mDepth <= tuple.getDepth() && trx.getKind() == Kind.ELEMENT) {
            mFirstUpdate = false;
            mStack.pop();
            emitEndTag(trx);
        } else {
            mUpdatedStack.pop();
            emitNode(trx);
            if (trx.getKind() == Kind.ELEMENT) {
                mStack.push(tuple);
            }
            trx.moveTo(nodeKey);
            assert mUpdatedStack.isEmpty();
        }
    } else // Emit pending end elements.
    if (mCloseElements) {
        final long pNodeKey = pRtx.getNodeKey();
        final TransactionTuple tuple = mStack.peek();
        NodeReadTrx rtx = tuple.getRtx();
        final long nodeKey = rtx.getNodeKey();
        int depth = tuple.getDepth();
        mDiff = tuple.getDiff();
        if (mDepth < depth || (mDiff == DiffType.UPDATED && mFirstUpdate)) {
            if (mDiff == DiffType.UPDATED) {
                mFirstUpdate = false;
            }
            rtx.moveTo(mStack.pop().getKey());
            emitEndTag(rtx);
            rtx.moveTo(nodeKey);
        } else {
            mFirstUpdate = true;
            rtx.moveTo(mStack.pop().getKey());
            emitEndTag(rtx);
            rtx.moveTo(nodeKey);
            mCloseElementsEmitted = true;
            mCloseElements = false;
        }
        pRtx.moveTo(pNodeKey);
    } else {
        mCloseElementsEmitted = false;
        // Emit node.
        emitNode(pRtx);
        mLastKey = pRtx.getNodeKey();
        if (mLastKey == 2878) {
            System.out.println();
        }
        mDiff = mAxis.getDiff();
        final int depth = mAxis.getDepth();
        if (mDiff == DiffType.UPDATED) {
            mFirstUpdate = true;
            mUpdatedStack.push(new TransactionTuple(mAxis.getOldRtx().getNodeKey(), mAxis.getOldRtx(), mAxis.getDiff(), mAxis.getDepth()));
        }
        // Push end element to stack if we are a start element.
        if (pRtx.getKind() == Kind.ELEMENT) {
            mStack.push(new TransactionTuple(mLastKey, pRtx, mAxis.getDiff(), mAxis.getDepth()));
        }
        final Kind nodeKind = pRtx.getKind();
        // required.
        if (mLastKey != Fixed.DOCUMENT_NODE_KEY.getStandardProperty()) {
            if (mAxis.hasNext()) {
                final long peekKey = mAxis.peek();
                mDepth = mAxis.getDepth();
                mAxis.getTransaction().moveTo(peekKey);
                if ((depth > mDepth) || (nodeKind == Kind.ELEMENT && mLastKey != mAxis.getTransaction().getParentKey())) {
                    moveToNextNode();
                } else {
                    mAxis.getTransaction().moveTo(mLastKey);
                }
            } else {
                mToLastKey = true;
                mCloseElements = true;
                mAxis.getTransaction().moveToDocumentRoot();
                mDepth = 0;
            }
        }
    }
}

Example 13 with NodeReadTrx

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

the class NodeWrapper method expandString.

/**
 * Filter text nodes.
 *
 * @return concatenated String of text node values
 */
private String expandString() {
    final FastStringBuffer fsb = new FastStringBuffer(FastStringBuffer.SMALL);
    try {
        final NodeReadTrx rtx = createRtxAndMove();
        final FilterAxis axis = new FilterAxis(new DescendantAxis(rtx), new TextFilter(rtx));
        while (axis.hasNext()) {
            axis.next();
            fsb.append(rtx.getValue());
        }
        rtx.close();
    } catch (final SirixException exc) {
        LOGGER.error(exc.toString());
    }
    return fsb.condense().toString();
}

Example 14 with NodeReadTrx

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

the class NodeWrapper method getDeclaredNamespaces.

@Override
public int[] getDeclaredNamespaces(final int[] buffer) {
    int[] retVal = null;
    if (mNodeKind == Kind.ELEMENT) {
        try {
            final NodeReadTrx rtx = createRtxAndMove();
            final int count = rtx.getNamespaceCount();
            if (count == 0) {
                retVal = EMPTY_NAMESPACE_LIST;
            } else {
                retVal = (buffer == null || count > buffer.length ? new int[count] : buffer);
                final NamePool pool = getNamePool();
                int n = 0;
                try {
                    for (int i = 0; i < count; i++) {
                        rtx.moveTo(i);
                        final String prefix = getPrefix();
                        final String uri = getURI();
                        rtx.moveTo(mKey);
                        retVal[n++] = pool.allocateNamespaceCode(prefix, uri);
                    }
                    rtx.close();
                } catch (final SirixException exc) {
                    LOGGER.error(exc.toString());
                }
                /*
					 * If the supplied array is larger than required, then the first
					 * unused entry will be set to -1.
					 */
                if (count < retVal.length) {
                    retVal[count] = -1;
                }
            }
        } catch (final SirixException e) {
            throw new IllegalStateException(e.getCause());
        }
    }
    return retVal;
}

Example 15 with NodeReadTrx

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

the class NodeWrapper method hasChildNodes.

@Override
public boolean hasChildNodes() {
    boolean hasChildNodes = false;
    try {
        final NodeReadTrx rtx = createRtxAndMove();
        if (rtx.getChildCount() > 0) {
            hasChildNodes = true;
        }
        rtx.close();
    } catch (final SirixException exc) {
        LOGGER.error(exc.toString());
    }
    return hasChildNodes;
}