--- /dev/null
+/*
+ * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.controller.cluster.datastore.node.utils.stream;
+
+import com.google.common.base.Preconditions;
+import org.opendaylight.yangtools.yang.data.api.schema.AnyXmlNode;
+import org.opendaylight.yangtools.yang.data.api.schema.AugmentationNode;
+import org.opendaylight.yangtools.yang.data.api.schema.ChoiceNode;
+import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
+import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
+import org.opendaylight.yangtools.yang.data.api.schema.LeafSetEntryNode;
+import org.opendaylight.yangtools.yang.data.api.schema.LeafSetNode;
+import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
+import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.api.schema.OrderedMapNode;
+import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListEntryNode;
+import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListNode;
+
+import java.io.Closeable;
+import java.io.Flushable;
+import java.io.IOException;
+import java.util.Collection;
+
+import static org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeStreamWriter.UNKNOWN_SIZE;
+
+
+/**
+ * This class is used only for testing purpose for now, we may use similar logic while integrating
+ * with cluster
+ */
+
+public class NormalizedNodeWriter implements Closeable, Flushable {
+ private final NormalizedNodeStreamWriter writer;
+
+ private NormalizedNodeWriter(final NormalizedNodeStreamWriter writer) {
+ this.writer = Preconditions.checkNotNull(writer);
+ }
+
+ protected final NormalizedNodeStreamWriter getWriter() {
+ return writer;
+ }
+
+ /**
+ * Create a new writer backed by a {@link org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter}.
+ *
+ * @param writer Back-end writer
+ * @return A new instance.
+ */
+ public static NormalizedNodeWriter forStreamWriter(final NormalizedNodeStreamWriter writer) {
+ return new NormalizedNodeWriter(writer);
+ }
+
+
+ /**
+ * Iterate over the provided {@link org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode} and emit write
+ * events to the encapsulated {@link org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter}.
+ *
+ * @param node Node
+ * @return
+ * @throws java.io.IOException when thrown from the backing writer.
+ */
+ public final NormalizedNodeWriter write(final NormalizedNode<?, ?> node) throws IOException {
+ if (wasProcessedAsComplexNode(node)) {
+ return this;
+ }
+
+ if (wasProcessAsSimpleNode(node)) {
+ return this;
+ }
+
+ throw new IllegalStateException("It wasn't possible to serialize node " + node);
+ }
+
+ @Override
+ public void flush() throws IOException {
+ writer.flush();
+ }
+
+ @Override
+ public void close() throws IOException {
+ writer.flush();
+ writer.close();
+ }
+
+ /**
+ * Emit a best guess of a hint for a particular set of children. It evaluates the
+ * iterable to see if the size can be easily gotten to. If it is, we hint at the
+ * real number of child nodes. Otherwise we emit UNKNOWN_SIZE.
+ *
+ * @param children Child nodes
+ * @return Best estimate of the collection size required to hold all the children.
+ */
+ static final int childSizeHint(final Iterable<?> children) {
+ return (children instanceof Collection) ? ((Collection<?>) children).size() : UNKNOWN_SIZE;
+ }
+
+ private boolean wasProcessAsSimpleNode(final NormalizedNode<?, ?> node) throws IOException {
+ if (node instanceof LeafSetEntryNode) {
+ final LeafSetEntryNode<?> nodeAsLeafList = (LeafSetEntryNode<?>)node;
+ writer.leafSetEntryNode(nodeAsLeafList.getIdentifier(), nodeAsLeafList.getValue());
+ return true;
+ } else if (node instanceof LeafNode) {
+ final LeafNode<?> nodeAsLeaf = (LeafNode<?>)node;
+ writer.leafNode(nodeAsLeaf.getIdentifier(), nodeAsLeaf.getValue());
+ return true;
+ } else if (node instanceof AnyXmlNode) {
+ final AnyXmlNode anyXmlNode = (AnyXmlNode)node;
+ writer.anyxmlNode(anyXmlNode.getIdentifier(), anyXmlNode.getValue());
+ return true;
+ }
+
+ return false;
+ }
+
+ /**
+ * Emit events for all children and then emit an endNode() event.
+ *
+ * @param children Child iterable
+ * @return True
+ * @throws java.io.IOException when the writer reports it
+ */
+ protected final boolean writeChildren(final Iterable<? extends NormalizedNode<?, ?>> children) throws IOException {
+ for (NormalizedNode<?, ?> child : children) {
+ write(child);
+ }
+
+ writer.endNode();
+ return true;
+ }
+
+ protected boolean writeMapEntryNode(final MapEntryNode node) throws IOException {
+ writer.startMapEntryNode(node.getIdentifier(), childSizeHint(node.getValue()));
+ return writeChildren(node.getValue());
+ }
+
+ private boolean wasProcessedAsComplexNode(final NormalizedNode<?, ?> node) throws IOException {
+ if (node instanceof ContainerNode) {
+ final ContainerNode n = (ContainerNode) node;
+ writer.startContainerNode(n.getIdentifier(), childSizeHint(n.getValue()));
+ return writeChildren(n.getValue());
+ }
+ if (node instanceof MapEntryNode) {
+ return writeMapEntryNode((MapEntryNode) node);
+ }
+ if (node instanceof UnkeyedListEntryNode) {
+ final UnkeyedListEntryNode n = (UnkeyedListEntryNode) node;
+ writer.startUnkeyedListItem(n.getIdentifier(), childSizeHint(n.getValue()));
+ return writeChildren(n.getValue());
+ }
+ if (node instanceof ChoiceNode) {
+ final ChoiceNode n = (ChoiceNode) node;
+ writer.startChoiceNode(n.getIdentifier(), childSizeHint(n.getValue()));
+ return writeChildren(n.getValue());
+ }
+ if (node instanceof AugmentationNode) {
+ final AugmentationNode n = (AugmentationNode) node;
+ writer.startAugmentationNode(n.getIdentifier());
+ return writeChildren(n.getValue());
+ }
+ if (node instanceof UnkeyedListNode) {
+ final UnkeyedListNode n = (UnkeyedListNode) node;
+ writer.startUnkeyedList(n.getIdentifier(), childSizeHint(n.getValue()));
+ return writeChildren(n.getValue());
+ }
+ if (node instanceof OrderedMapNode) {
+ final OrderedMapNode n = (OrderedMapNode) node;
+ writer.startOrderedMapNode(n.getIdentifier(), childSizeHint(n.getValue()));
+ return writeChildren(n.getValue());
+ }
+ if (node instanceof MapNode) {
+ final MapNode n = (MapNode) node;
+ writer.startMapNode(n.getIdentifier(), childSizeHint(n.getValue()));
+ return writeChildren(n.getValue());
+ }
+ if (node instanceof LeafSetNode) {
+ //covers also OrderedLeafSetNode for which doesn't exist start* method
+ final LeafSetNode<?> n = (LeafSetNode<?>) node;
+ writer.startLeafSet(n.getIdentifier(), childSizeHint(n.getValue()));
+ return writeChildren(n.getValue());
+ }
+
+ return false;
+ }
+}
Code Review / controller.git / blobdiff