Examples of org.yaml.snakeyaml.nodes.Node

org.yaml.snakeyaml.nodes.Node
org/spec/1.1/">YAML Specification.

While loading, the node graph is usually created by the {@link org.yaml.snakeyaml.composer.Composer}, and later transformed into application specific Java classes by the classes from the {@link org.yaml.snakeyaml.constructor} package.

     * @return constructed instance
     */
    public Object getData() {
        // Construct and return the next document.
        composer.checkNode();
        Node node = composer.getNode();
        if (rootTag != null) {
            node.setTag(rootTag);
        }
        return constructDocument(node);
    }

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     * @throws ComposerException
     *             in case there are more documents in the stream
     */
    public Object getSingleData(Class<?> type) {
        // Ensure that the stream contains a single document and construct it
        Node node = composer.getSingleNode();
        if (node != null) {
            if (Object.class != type) {
                node.setTag(new Tag(type));
            } else if (rootTag != null) {
                node.setTag(rootTag);
            }
            return constructDocument(node);
        }
        return null;
    }

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    }


    protected void constructMapping2ndStep(MappingNode node, Map<Object, Object> mapping) {
        List<NodeTuple> nodeValue = (List<NodeTuple>) node.getValue();
        for (NodeTuple tuple : nodeValue) {
            Node keyNode = tuple.getKeyNode();
            Node valueNode = tuple.getValueNode();
            Object key = constructObject(keyNode);
            if (key != null) {
                try {
                    key.hashCode();// check circular dependencies
                } catch (Exception e) {

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    }


    protected void constructSet2ndStep(MappingNode node, Set<Object> set) {
        List<NodeTuple> nodeValue = (List<NodeTuple>) node.getValue();
        for (NodeTuple tuple : nodeValue) {
            Node keyNode = tuple.getKeyNode();
            Object key = constructObject(keyNode);
            if (key != null) {
                try {
                    key.hashCode();// check circular dependencies
                } catch (Exception e) {
                    throw new ConstructorException("while constructing a Set", node.getStartMark(),
                            "found unacceptable key " + key, tuple.getKeyNode().getStartMark(), e);
                }
            }
            if (keyNode.isTwoStepsConstruction()) {
                /*
                 * if keyObject is created it 2 steps we should postpone putting
                 * it into the set because it may have different hash after
                 * initialization compared to clean just created one. And set of
                 * course does not observe value hashCode changes.

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        List<NodeTuple> nodeValue = node.getValue();
        // reversed for http://code.google.com/p/snakeyaml/issues/detail?id=139
        Collections.reverse(nodeValue);
        for (Iterator<NodeTuple> iter = nodeValue.iterator(); iter.hasNext();) {
            final NodeTuple nodeTuple = iter.next();
            final Node keyNode = nodeTuple.getKeyNode();
            final Node valueNode = nodeTuple.getValueNode();
            if (keyNode.getTag().equals(Tag.MERGE)) {
                iter.remove();
                switch (valueNode.getNodeId()) {
                case mapping:
                    MappingNode mn = (MappingNode) valueNode;
                    mergeNode(mn, false, key2index, values);
                    break;
                case sequence:
                    SequenceNode sn = (SequenceNode) valueNode;
                    List<Node> vals = sn.getValue();
                    for (Node subnode : vals) {
                        if (!(subnode instanceof MappingNode)) {
                            throw new ConstructorException("while constructing a mapping",
                                    node.getStartMark(),
                                    "expected a mapping for merging, but found "
                                            + subnode.getNodeId(), subnode.getStartMark());
                        }
                        MappingNode mnode = (MappingNode) subnode;
                        mergeNode(mnode, false, key2index, values);
                    }
                    break;
                default:
                    throw new ConstructorException("while constructing a mapping",
                            node.getStartMark(),
                            "expected a mapping or list of mappings for merging, but found "
                                    + valueNode.getNodeId(), valueNode.getStartMark());
                }
            } else {
                // we need to construct keys to avoid duplications
                Object key = constructObject(keyNode);
                if (!key2index.containsKey(key)) { // 1st time merging key

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                if (mnode.getValue().size() != 1) {
                    throw new ConstructorException("while constructing an ordered map",
                            node.getStartMark(), "expected a single mapping item, but found "
                                    + mnode.getValue().size() + " items", mnode.getStartMark());
                }
                Node keyNode = mnode.getValue().get(0).getKeyNode();
                Node valueNode = mnode.getValue().get(0).getValueNode();
                Object key = constructObject(keyNode);
                Object value = constructObject(valueNode);
                omap.put(key, value);
            }
            return omap;

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                if (mnode.getValue().size() != 1) {
                    throw new ConstructorException("while constructing pairs", node.getStartMark(),
                            "expected a single mapping item, but found " + mnode.getValue().size()
                                    + " items", mnode.getStartMark());
                }
                Node keyNode = mnode.getValue().get(0).getKeyNode();
                Node valueNode = mnode.getValue().get(0).getValueNode();
                Object key = constructObject(keyNode);
                Object value = constructObject(valueNode);
                pairs.add(new Object[] { key, value });
            }
            return pairs;

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        Serializer serializer = new Serializer(new Emitter(output, dumperOptions), resolver,
                dumperOptions, rootTag);
        try {
            serializer.open();
            while (data.hasNext()) {
                Node node = representer.represent(data.next());
                serializer.serialize(node);
            }
            serializer.close();
        } catch (java.io.IOException e) {
            throw new YAMLException(e);

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        if (node instanceof MappingNode) {
            MappingNode mnode = (MappingNode) node;
            List<NodeTuple> list = mnode.getValue();
            if (list.size() == 1) {
                NodeTuple tuple = list.get(0);
                Node key = tuple.getKeyNode();
                if (key instanceof ScalarNode) {
                    ScalarNode scalar = (ScalarNode) key;
                    if (GUESS_COMPACT.matcher(scalar.getValue()).matches()) {
                        return getCompactConstruct();
                    }

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        public void construct2ndStep(Node node, Object object) {
            // Compact Object Notation may contain only one entry
            MappingNode mnode = (MappingNode) node;
            NodeTuple nodeTuple = mnode.getValue().iterator().next();


            Node valueNode = nodeTuple.getValueNode();


            if (valueNode instanceof MappingNode) {
                valueNode.setType(object.getClass());
                constructJavaBean2ndStep((MappingNode) valueNode, object);
            } else {
                // value is a list
                applySequence(object, constructSequence((SequenceNode) valueNode));
            }

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