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/*
* Copyright 2017 Huawei Technologies Co., Ltd.
*
* 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.
*/
package org.onap.cli.fw.schema;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import org.onap.cli.fw.cmd.OnapCommand;
import org.onap.cli.fw.conf.OnapCommandConstants;
import org.onap.cli.fw.error.OnapCommandException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Helps to merge two yaml schemas
*
*/
public class OnapCommandSchemaMerger {
static Logger LOG = LoggerFactory.getLogger(OnapCommandSchemaMerger.class);
public static Map<String, ?> mergeSchemas(OnapCommand cmd) throws OnapCommandException {
Map<String, Object> mergedResult = new LinkedHashMap<String, Object>();
for (String schema: cmd.getSchemas()) {
Map<String , Object> schemaMap = (Map<String, Object>) OnapCommandSchemaLoader.validateSchemaVersion(schema, cmd.getSchemaVersion());
mergeYamlMap(mergedResult, schemaMap);
}
return mergedResult;
}
public static void mergeYamlMap(Map<String, Object> mergedResult, Map<String, Object> yamlContents) {
if (yamlContents == null) return;
for (String key : yamlContents.keySet()) {
Object yamlValue = yamlContents.get(key);
if (yamlValue == null) {
mergedResult.put(key, yamlValue);
continue;
}
Object existingValue = mergedResult.get(key);
if (existingValue != null) {
if (yamlValue instanceof Map) {
if (existingValue instanceof Map) {
mergeYamlMap((Map<String, Object>) existingValue, (Map<String, Object>) yamlValue);
} else if (existingValue instanceof String) {
throw new IllegalArgumentException("Cannot merge complex element into a simple element: "+key);
} else {
throw unknownValueType(key, yamlValue);
}
} else if (yamlValue instanceof List) {
mergeYamlLists(mergedResult, key, yamlValue);
} else if (yamlValue instanceof String
|| yamlValue instanceof Boolean
|| yamlValue instanceof Double
|| yamlValue instanceof Integer) {
mergedResult.put(key, yamlValue);
} else {
throw unknownValueType(key, yamlValue);
}
} else {
if (yamlValue instanceof Map
|| yamlValue instanceof List
|| yamlValue instanceof String
|| yamlValue instanceof Boolean
|| yamlValue instanceof Integer
|| yamlValue instanceof Double) {
mergedResult.put(key, yamlValue);
} else {
throw unknownValueType(key, yamlValue);
}
}
}
}
private static IllegalArgumentException unknownValueType(String key, Object yamlValue) {
final String msg = "Cannot merge element of unknown type: " + key + ": " + yamlValue.getClass().getName();
return new IllegalArgumentException(msg);
}
@SuppressWarnings("unchecked")
private static void mergeYamlLists(Map<String, Object> mergedResult, String key, Object yamlValue) {
if (! (yamlValue instanceof List && mergedResult.get(key) instanceof List)) {
throw new IllegalArgumentException("Cannot merge a list with a non-list: "+key);
}
List<Object> originalList = (List<Object>) mergedResult.get(key);
for (Object o: (List<Object>) yamlValue) {
Map<String, Object> oN = (Map) o;
String nameN = (String)oN.getOrDefault(OnapCommandConstants.NAME, null);
//Name should be existing in the map, otherwise continue as don't know how to compare
if (nameN != null) {
boolean existing = false;
for (Object e: originalList) {
Map<String, Object> oE = (Map) e;
String nameE = (String)oE.getOrDefault(OnapCommandConstants.NAME, null);
//Name should be existing in the map, otherwise continue as don't know how to compare
if (nameN.equals(nameE)) {
for (Entry<String, Object> oNe : oN.entrySet()) {
oE.put(oNe.getKey(), oNe.getValue());
}
existing = true;
break;
}
}
if (!existing) {
originalList.add(o);
}
}
}
}
}
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