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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.parser;
import static org.openecomp.core.converter.pnfd.model.PnfTransformationToken.CONVERSIONS;
import static org.openecomp.core.converter.pnfd.model.PnfTransformationToken.DESCRIPTION;
import static org.openecomp.core.converter.pnfd.model.PnfTransformationToken.FROM;
import static org.openecomp.core.converter.pnfd.model.PnfTransformationToken.NAME;
import static org.openecomp.core.converter.pnfd.model.PnfTransformationToken.PROPERTIES;
import static org.openecomp.core.converter.pnfd.model.PnfTransformationToken.QUERY;
import static org.openecomp.core.converter.pnfd.model.PnfTransformationToken.TO;
import static org.openecomp.core.converter.pnfd.model.PnfTransformationToken.TRANSFORMATION_FOR;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.collections.MapUtils;
import org.openecomp.core.converter.impl.pnfd.strategy.ReplaceConversionStrategy;
import org.openecomp.core.converter.pnfd.model.ConversionDefinition;
import org.openecomp.core.converter.pnfd.model.ConversionQuery;
import org.openecomp.core.converter.pnfd.model.Transformation;
import org.openecomp.core.converter.pnfd.model.TransformationBlock;
import org.openecomp.core.converter.pnfd.model.TransformationProperty;
import org.openecomp.core.converter.pnfd.model.TransformationPropertyType;
import org.openecomp.sdc.be.utils.TypeUtils.ToscaTagNamesEnum;
import org.openecomp.sdc.logging.api.Logger;
import org.openecomp.sdc.logging.api.LoggerFactory;
/**
* Handles YAML from/to {@link Transformation} conversions
*/
public class TransformationYamlParser {
private static final Logger LOGGER = LoggerFactory.getLogger(TransformationYamlParser.class);
private TransformationYamlParser() {
}
/**
* Parses the given YAML object to a {@link Transformation} instance.
*
* @param transformationYaml the YAML object representing a transformation
* @return A new instance of {@link Transformation}.
*/
public static Optional<Transformation> parse(final Map<String, Object> transformationYaml) {
final Transformation transformation = new Transformation();
final Optional<String> name = parseStringAttribute(NAME.getName(), transformationYaml);
if (!name.isPresent()) {
LOGGER.warn("Invalid '{}' value in transformation '{}'", NAME.getName(), transformationYaml.toString());
}
transformation.setName(name.orElse(null));
transformation.setDescription(parseStringAttribute(DESCRIPTION.getName(), transformationYaml).orElse(null));
transformation.setPropertySet(readProperties(transformationYaml));
final String block = parseStringAttribute(TRANSFORMATION_FOR.getName(), transformationYaml).orElse(null);
final Optional<TransformationBlock> transformationBlockOptional = TransformationBlock.parse(block);
if (transformationBlockOptional.isPresent()) {
final TransformationBlock transformationBlock = transformationBlockOptional.get();
transformation.setBlock(transformationBlock);
parseTransformationBlock(transformationBlock, transformation, transformationYaml);
} else {
LOGGER.warn("Invalid '{}' value in transformation '{}'", TRANSFORMATION_FOR.getName(), transformationYaml.toString());
}
if (transformation.isValid()) {
return Optional.of(transformation);
}
return Optional.empty();
}
private static Set<TransformationProperty> readProperties(final Map<String, Object> transformationYaml) {
final Map<String, Object> propertyMap = (Map<String, Object>) transformationYaml.get(PROPERTIES.getName());
if (MapUtils.isEmpty(propertyMap)) {
return Collections.emptySet();
}
final Set<TransformationProperty> propertySet = new HashSet<>();
propertyMap.forEach((key, value) -> {
final TransformationPropertyType transformationPropertyType = TransformationPropertyType.parse(key).orElse(null);
if (transformationPropertyType != null) {
if (value instanceof String) {
propertySet.add(new TransformationProperty<>(transformationPropertyType, (String) value));
} else if (value instanceof Boolean) {
propertySet.add(new TransformationProperty<>(transformationPropertyType, (Boolean) value));
} else if (value instanceof Integer) {
propertySet.add(new TransformationProperty<>(transformationPropertyType, (Integer) value));
} else {
propertySet.add(new TransformationProperty<>(transformationPropertyType, value));
}
}
});
return propertySet;
}
private static void parseTransformationBlock(final TransformationBlock transformationBlock, final Transformation transformationReference,
final Map<String, Object> transformationYaml) {
if (transformationBlock == TransformationBlock.CUSTOM_NODE_TYPE) {
parseCustomNodeTypeBlock(transformationReference, transformationYaml);
return;
}
ConversionQueryYamlParser.parse(transformationYaml.get(QUERY.getName())).ifPresent(transformationReference::setConversionQuery);
transformationReference.setConversionDefinitionList(parseConversions(transformationYaml));
}
private static void parseCustomNodeTypeBlock(final Transformation transformationReference, final Map<String, Object> transformationYaml) {
final Object fromAttribute = transformationYaml.get(FROM.getName());
if (!(fromAttribute instanceof String)) {
return;
}
final String from = parseStringAttribute(FROM.getName(), transformationYaml).orElse(null);
final Object toAttribute = transformationYaml.get(TO.getName());
if (!(toAttribute instanceof String)) {
return;
}
final String to = parseStringAttribute(TO.getName(), transformationYaml).orElse(null);
final HashMap<String, String> transformationQuery = new HashMap<>();
transformationQuery.put(ToscaTagNamesEnum.DERIVED_FROM.getElementName(), from);
transformationReference.setConversionQuery(new ConversionQuery(transformationQuery));
final List<ConversionDefinition> conversionDefinitionList = new ArrayList<>();
final HashMap<String, String> conversionDefinitionQuery = new HashMap<>();
conversionDefinitionQuery.put(ToscaTagNamesEnum.TYPE.getElementName(), null);
ConversionDefinition conversionDefinition = new ConversionDefinition(new ConversionQuery(conversionDefinitionQuery),
ToscaTagNamesEnum.TYPE.getElementName(), new ReplaceConversionStrategy(from, to));
conversionDefinitionList.add(conversionDefinition);
transformationReference.setConversionDefinitionList(conversionDefinitionList);
}
private static List<ConversionDefinition> parseConversions(final Map<String, Object> conversionYaml) {
final List<Object> conversionList = (List<Object>) conversionYaml.get(CONVERSIONS.getName());
if (CollectionUtils.isEmpty(conversionList)) {
return Collections.emptyList();
}
return conversionList.stream().map(conversion -> ConversionDefinitionYamlParser.parse((Map<String, Object>) conversion).orElse(null))
.filter(Objects::nonNull).collect(Collectors.toList());
}
private static Optional<String> parseStringAttribute(final String attribute, final Map<String, Object> transformationYaml) {
try {
return Optional.of((String) transformationYaml.get(attribute));
} catch (final Exception e) {
LOGGER.warn("Could not parse the String '{}' in transformation '{}'", attribute, transformationYaml.toString(), e);
return Optional.empty();
}
}
}
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