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/*-
* ============LICENSE_START=======================================================
* ONAP - CCSDK
* ================================================================================
* Copyright (C) 2018 Huawei Technologies Co., Ltd. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.ccsdk.sli.plugins.yangserializers.pnserializer;
import java.util.Collection;
import java.util.Map;
import org.onap.ccsdk.sli.core.sli.SvcLogicException;
/**
* Implementation of properties node walker which helps in forming a new tree from properties node.
*
* @param <T> node child of properties node.
*/
public class DefaultPropertiesNodeWalker<T extends NodeChild> implements PropertiesNodeWalker {
@Override
public void walk(PropertiesNodeListener listener,
PropertiesNode propertiesNode) throws SvcLogicException {
listener.start(propertiesNode);
walkChildNode(listener, propertiesNode);
listener.end(propertiesNode);
}
/**
* Walks the children node from the parent node.
*
* @param listener properties node listener
* @param propertiesNode properties node
* @throws SvcLogicException when properties node walking fails
*/
public void walkChildNode(PropertiesNodeListener listener,
PropertiesNode propertiesNode)
throws SvcLogicException {
Map<String, T> children = getChildren(propertiesNode);
if (children != null) {
for (Map.Entry<String, T> entry : children.entrySet()) {
PropertiesNode node = ((PropertiesNode) entry.getValue());
listener.enterPropertiesNode(node);
walkChildNode(listener, node);
listener.exitPropertiesNode(node);
}
}
if (propertiesNode instanceof RootNode) {
processAugments(propertiesNode, listener);
}
}
/**
* Processes the augments present in the root node.
*
* @param node root node
* @param listener properties node listener
* @throws SvcLogicException when augment node walking fails
*/
private void processAugments(PropertiesNode node,
PropertiesNodeListener listener)
throws SvcLogicException {
for (Map.Entry<Object, Collection<PropertiesNode>>
augToChild : node.augmentations().asMap().entrySet()) {
Collection<PropertiesNode> child = augToChild.getValue();
if (!child.isEmpty()) {
for (PropertiesNode p : child) {
listener.enterPropertiesNode(p);
walkChildNode(listener, p);
listener.exitPropertiesNode(p);
}
}
}
}
/**
* Returns the children node according to the property node type.
*
* @param value property node
* @return property node children
*/
private Map<String,T> getChildren(PropertiesNode value) {
if (value instanceof RootNode) {
return ((RootNode) value).children();
}
switch (value.nodeType()) {
case SINGLE_INSTANCE_NODE:
return ((InnerNode) value).children();
case MULTI_INSTANCE_HOLDER_NODE:
return ((Map<String, T>) ((ListHolderNode) value).children());
case MULTI_INSTANCE_NODE:
return ((Map<String, T>) ((MultiInstanceNode) value)
.children());
case MULTI_INSTANCE_LEAF_HOLDER_NODE:
return ((Map<String, T>) ((LeafListHolderNode) value)
.children());
case SINGLE_INSTANCE_LEAF_NODE:
case MULTI_INSTANCE_LEAF_NODE:
case ANY_XML_NODE:
return null;
default:
throw new IllegalArgumentException("No more types allowed");
}
}
}
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