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/*-
* ============LICENSE_START=======================================================
* Simulator
* ================================================================================
* Copyright (C) 2021 Nokia. 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.avcnmanager.message.processing;
import org.onap.avcnmanager.message.data.ChangePack;
import org.onap.avcnmanager.message.processing.targets.MapTarget;
import org.onap.avcnmanager.message.processing.targets.StringBuilderTarget;
import org.onap.avcnmanager.message.processing.targets.TargetContainer;
import org.onap.avcnmanager.message.processing.tokens.ContainerToken;
import org.onap.avcnmanager.message.processing.tokens.ListToken;
import org.onap.avcnmanager.message.processing.tokens.Token;
import org.onap.avcnmanager.message.processing.tokens.ValueToken;
import org.springframework.stereotype.Component;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
@Component
public final class NetconfTextProcessor implements TextProcessor {
private static final Pattern PATTERN_PATH = Pattern.compile("/+");
private static final String DELIMITER = " , ";
@Override
public ParsingResult process(String key, ChangePack message) {
StringBuilderTarget dn = new StringBuilderTarget(new StringBuilder(), DELIMITER);
MapTarget attributesMap = new MapTarget(new HashMap<>());
LinkedList<Token> dequeOfTokens = new LinkedList<>();
String newPath = message.getNew().getPath();
String value = message.getNew().getValue();
if(!value.isEmpty()) {
newPath += " = " +value;
}
List<String> strings = splitToStrings(newPath, PATTERN_PATH);
convertToTypedTokens(strings, dequeOfTokens, 0);
removeConsecutiveDuplicatesFrom(dequeOfTokens);
dumpTokensIntoRespectiveContainers(dequeOfTokens, dn, attributesMap);
return emitResult(dn, attributesMap);
}
private static List<String> splitToStrings(String newPath, Pattern patternPath) {
return patternPath.splitAsStream(newPath)
.filter(s -> !s.isEmpty())
.collect(Collectors.toList());
}
private static void removeConsecutiveDuplicatesFrom(LinkedList<Token> dequeOfTokens) {
List<Token> toRemove = new LinkedList<>();
for (int i = 1; i < dequeOfTokens.size(); i++) {
if(ListToken.class.equals(dequeOfTokens.get(i-1).getClass())
&& ListToken.class.equals(dequeOfTokens.get(i).getClass())) {
toRemove.add(dequeOfTokens.get(i-1));
}
}
dequeOfTokens.removeAll(toRemove);
}
private static void convertToTypedTokens(List<String> strings, LinkedList<Token> dequeOfTokens, int startIndex) {
if (strings.size() > startIndex) {
String str = strings.get(startIndex);
Token token = determineToken(str);
dequeOfTokens.add(token);
convertToTypedTokens(strings,dequeOfTokens, startIndex + 1);
}
}
private static Token determineToken(String str) {
if (str.endsWith("]")) {
return new ListToken(str);
} else if (str.contains("=")) {
return new ValueToken(str);
} else {
return new ContainerToken(str);
}
}
private static void dumpTokensIntoRespectiveContainers(LinkedList<Token> dequeOfTokens,
TargetContainer<String> dnBuilder,
TargetContainer<String> attributesBuilder) {
dequeOfTokens.forEach(t -> {
t.dump(dnBuilder);
t.dump(attributesBuilder);
});
}
private static ParsingResult emitResult(StringBuilderTarget dnSb, MapTarget attributesMap) {
dnSb.trimLastDelimiter();
return new ParsingResult(dnSb.stringValue(), attributesMap.mapValue());
}
}
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