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/*-
* ============LICENSE_START=======================================================
* openECOMP : APP-C
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. 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.openecomp.appc.rankingframework.impl;
import java.util.HashMap;
import org.openecomp.appc.rankingframework.ConfigurationEntry;
import org.openecomp.appc.rankingframework.ConfigurationSet;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
class RankedAttributesTreeBuilder {
private static final EELFLogger logger = EELFManager.getInstance().getLogger(RankedAttributesTreeBuilder.class);
private RankedAttributesTreeBuilder() {
}
static <R> CompositeNode<R> build(ConfigurationSet<R> config) {
Object[] names = config.getRankedAttributeNames().toArray();
CompositeNode<R> root = new CompositeNode<>("ROOT", Constants.DEFAULT_MATCH, null,
new HashMap<Object, Node<R>>());
if (logger.isDebugEnabled()) {
logger.debug(String.format("Building decision tree for ranked attributes: %s", config.getRankedAttributeNames()));
}
for (ConfigurationEntry<R> entry : config.getEntries()) {
process(entry, names, root);
}
return root;
}
private static <R> void process(ConfigurationEntry<R> entry, Object[] names, CompositeNode<R> root) {
CompositeNode<R> parentNode = null;
for (int i = 0; i < names.length; i++) {
if (i == 0) {
parentNode = root;
}
final String name = (String) names[i];
final Object value = value(entry, name);
if (i < names.length - 1) {
CompositeNode<R> currentNode = (CompositeNode<R>) parentNode.children().get(value);
if (currentNode == null) {
currentNode = new CompositeNode<>(name, value, parentNode, new HashMap<Object, Node<R>>());
parentNode.children().put(value, currentNode);
}
parentNode = currentNode;
} else {
LeafNode<R> currentNode = (LeafNode<R>) parentNode.children().get(value);
if (currentNode == null) {
currentNode = new LeafNode<R>(name, value, parentNode, entry.getResult());
parentNode.children().put(value, currentNode);
if (logger.isDebugEnabled()) {
logger.debug(String.format("Branch has been created: %s", currentNode));
}
} else {
logger.error(
String.format("Duplicated configuration entry has been detected for attribute '%s' with value '%s' - the node '%s'exists already",
name,
value,
currentNode));
throw new IllegalArgumentException("Duplicated configuration entry: " + currentNode);
}
}
}
}
private static <R> Object value(ConfigurationEntry<R> entry, String name) {
Object value = entry.getAttributeValue(name);
return Utils.value(value);
}
}
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