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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2019 Nordix Foundation
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.openecomp.core.converter.impl.pnfd;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.apache.commons.collections.MapUtils;
import org.openecomp.core.converter.pnfd.exception.QueryOperationNotSupportedException;
import org.openecomp.core.converter.pnfd.model.ConversionQuery;
/**
* Runs YAML queries
*/
public class PnfdQueryExecutor {
private PnfdQueryExecutor() {
}
/**
* Finds if a YAML object contains the provided YAML query.
* @param conversionQuery The query
* @param yamlObject The YAML object to be searched
* @return
* {@code true} if the YAML query structure was found in the YAML object, {@code false} otherwise.
*/
public static boolean find(final ConversionQuery conversionQuery, final Object yamlObject) {
return find(conversionQuery.getQuery(), yamlObject);
}
/**
* Recursive structure combined with {@link #findMap(Map, Map)} to find if a YAML object contains the provided YAML query.
* Compares the objects if it's a scalar value, otherwise go further in the YAML hierarchical structure
* calling the {@link #findMap(Map, Map)}.
* @param query The current query
* @param yamlObject The current YAML object to be searched
* @return
* {@code true} if the YAML query structure was found in the YAML object, {@code false} otherwise.
*/
private static boolean find(final Object query, final Object yamlObject) {
if (query == null) {
return true;
}
checkSupportedQueryType(query);
if (query instanceof String) {
return query.equals(yamlObject);
}
if (query instanceof Map) {
return findMap((Map) query, (Map) yamlObject);
}
return false;
}
/**
* Recursive structure combined with {@link #find(Object, Object)} to find if a YAML object contains the provided YAML query. *
* @param query The query current object
* @param yamlObject The YAML object to be searched
* @return
* {@code true} if the YAML query structure was found in the YAML object, {@code false} otherwise.
*/
private static boolean findMap(final Map query, final Map yamlObject) {
if (MapUtils.isEmpty(query) || MapUtils.isEmpty(yamlObject)) {
return false;
}
if (!yamlObject.keySet().containsAll(query.keySet())) {
return false;
}
return query.entrySet().parallelStream().allMatch(queryEntryObj -> {
final Entry queryEntry = (Entry) queryEntryObj;
return find(queryEntry.getValue(), yamlObject.get(queryEntry.getKey()));
});
}
/**
* Checks the supported types for a query.
* @param query the query to check
*/
private static void checkSupportedQueryType(final Object query) {
if (query instanceof String || query instanceof Map) {
return;
}
if (query instanceof List || query instanceof Set) {
throw new QueryOperationNotSupportedException("Yaml list query is not supported yet");
}
throw new QueryOperationNotSupportedException(
String.format("Yaml query operation for '%s' is not supported yet", query.getClass())
);
}
}
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