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/*
* -
* ============LICENSE_START=======================================================
* Copyright (C) 2022 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.sdc.be.datatypes.elements;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import org.apache.commons.lang3.StringUtils;
import org.openecomp.sdc.be.config.Configuration;
import org.openecomp.sdc.be.config.ConfigurationManager;
import org.openecomp.sdc.be.datatypes.enums.PropertySource;
import org.openecomp.sdc.be.datatypes.tosca.ToscaGetFunctionType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.yaml.snakeyaml.Yaml;
public class ToscaFunctionJsonDeserializer extends StdDeserializer<ToscaFunction> {
private static final Logger LOGGER = LoggerFactory.getLogger(ToscaFunctionJsonDeserializer.class);
public ToscaFunctionJsonDeserializer() {
this(null);
}
public ToscaFunctionJsonDeserializer(Class<?> vc) {
super(vc);
}
@Override
public ToscaFunction deserialize(final JsonParser jsonParser, final DeserializationContext context) throws IOException {
final JsonNode node = jsonParser.getCodec().readTree(jsonParser);
return deserializeToscaFunction(node, context);
}
private ToscaFunction deserializeToscaFunction(final JsonNode node, final DeserializationContext context) throws IOException {
final String functionType;
if (node.get("type") != null) {
functionType = node.get("type").asText();
} else if (node.get("functionType") != null) {
//support for legacy tosca function
functionType = node.get("functionType").asText();
} else {
throw context.instantiationException(ToscaFunction.class, "Attribute type not provided");
}
final ToscaFunctionType toscaFunctionType = ToscaFunctionType.findType(functionType)
.orElseThrow(() -> context.instantiationException(ToscaFunction.class,
String.format("Invalid function type '%s' or attribute type not provided", functionType))
);
if (toscaFunctionType == ToscaFunctionType.GET_INPUT || toscaFunctionType == ToscaFunctionType.GET_ATTRIBUTE
|| toscaFunctionType == ToscaFunctionType.GET_PROPERTY) {
return deserializeToscaGetFunction(toscaFunctionType, node, context);
}
if (toscaFunctionType == ToscaFunctionType.CONCAT) {
return this.deserializeConcatFunction(node, context);
}
if (toscaFunctionType == ToscaFunctionType.YAML) {
return this.deserializeYamlFunction(node, context);
}
if (toscaFunctionType == ToscaFunctionType.CUSTOM) {
return this.deserializeCustomFunction(node, context);
}
return null;
}
private ToscaFunction deserializeYamlFunction(final JsonNode node, final DeserializationContext context) throws JsonMappingException {
var yamlFunction = new CustomYamlFunction();
final JsonNode valueJsonNode = node.get("value");
if (valueJsonNode == null) {
return yamlFunction;
}
final String valueAsText = valueJsonNode.asText();
try {
yamlFunction.setYamlValue(new Yaml().load(valueAsText));
} catch (final Exception e) {
final String errorMsg = String.format("Could not parse YAML expression: '%s'", valueAsText);
LOGGER.debug(errorMsg, e);
throw context.instantiationException(ToscaFunction.class, errorMsg);
}
return yamlFunction;
}
private ToscaGetFunctionDataDefinition deserializeToscaGetFunction(final ToscaFunctionType toscaFunctionType, final JsonNode node,
final DeserializationContext context) throws JsonMappingException {
final ToscaGetFunctionDataDefinition toscaGetFunction = new ToscaGetFunctionDataDefinition();
toscaGetFunction.setFunctionType(ToscaGetFunctionType.fromToscaFunctionType(toscaFunctionType).orElse(null));
toscaGetFunction.setSourceName(getAsTextOrElseNull(node, "sourceName"));
toscaGetFunction.setSourceUniqueId(getAsTextOrElseNull(node, "sourceUniqueId"));
toscaGetFunction.setPropertyName(getAsTextOrElseNull(node, "propertyName"));
toscaGetFunction.setPropertyUniqueId(getAsTextOrElseNull(node, "propertyUniqueId"));
toscaGetFunction.setToscaIndexList(getNumberAsTextOrElseNull(node, "toscaIndexList", context));
final String propertySource = getAsTextOrElseNull(node, "propertySource");
if (StringUtils.isNotEmpty(propertySource)) {
final PropertySource propertySource1 = PropertySource.findType(propertySource).orElseThrow(() ->
context.instantiationException(ToscaGetFunctionDataDefinition.class,
String.format("Invalid propertySource '%s'", propertySource))
);
toscaGetFunction.setPropertySource(propertySource1);
}
final JsonNode propertyPathFromSourceNode = node.get("propertyPathFromSource");
if (propertyPathFromSourceNode != null) {
if (!propertyPathFromSourceNode.isArray()) {
throw context.instantiationException(ToscaGetFunctionDataDefinition.class, "Expecting an array for propertyPathFromSource attribute");
}
final List<String> pathFromSource = new ArrayList<>();
propertyPathFromSourceNode.forEach(jsonNode -> pathFromSource.add(jsonNode.asText()));
toscaGetFunction.setPropertyPathFromSource(pathFromSource);
}
return toscaGetFunction;
}
private String getAsTextOrElseNull(final JsonNode node, final String fieldName) {
final JsonNode jsonNode = node.get(fieldName);
if (jsonNode == null) {
return null;
}
if (!jsonNode.isTextual()) {
return null;
}
return jsonNode.asText();
}
private List<Object> getNumberAsTextOrElseNull(final JsonNode node, final String fieldName, final DeserializationContext context) throws JsonMappingException{
List<Object> toscaIndexList = new ArrayList<Object>();
final JsonNode jsonNode = node.get(fieldName);
if (jsonNode != null) {
if (!jsonNode.isArray()) {
throw context.instantiationException(ToscaGetFunctionDataDefinition.class, "Expecting an array for toscaIndexList attribute");
}
for (int index=0;index<jsonNode.size();index++) {
String textValue = jsonNode.get(index).asText();
if (index%2 == 0) {
if (textValue.equalsIgnoreCase("INDEX")) {
toscaIndexList.add(textValue);
} else {
try {
toscaIndexList.add(Integer.parseInt(textValue));
} catch(Exception e) {
throw context.instantiationException(ToscaGetFunctionDataDefinition.class, "Expecting a valid value for toscaIndex attribute");
}
}
} else {
toscaIndexList.add(textValue);
}
}
}
return toscaIndexList;
}
private ToscaConcatFunction deserializeConcatFunction(final JsonNode concatFunctionJsonNode,
final DeserializationContext context) throws IOException {
final var toscaConcatFunction = new ToscaConcatFunction();
List<ToscaFunctionParameter> functionParameterList = getParameters(concatFunctionJsonNode, context);
toscaConcatFunction.setParameters(functionParameterList);
return toscaConcatFunction;
}
private ToscaCustomFunction deserializeCustomFunction(final JsonNode customFunctionJsonNode,
final DeserializationContext context) throws IOException {
final var toscaCustomFunction = new ToscaCustomFunction();
final String name = getAsTextOrElseNull(customFunctionJsonNode, "name");
if (name == null) {
throw context.instantiationException(List.class, "Expecting a string for the 'name' entry");
}
toscaCustomFunction.setName(name);
toscaCustomFunction.setToscaFunctionType(getCustomFunctionType(name));
List<ToscaFunctionParameter> functionParameterList = getParameters(customFunctionJsonNode, context);
toscaCustomFunction.setParameters(functionParameterList);
if (ToscaFunctionType.GET_INPUT.equals(toscaCustomFunction.getToscaFunctionType())) {
validateGetInput(toscaCustomFunction, context);
}
return toscaCustomFunction;
}
private ToscaFunctionType getCustomFunctionType(String name) {
List<Configuration.CustomToscaFunction> customFunctions =
ConfigurationManager.getConfigurationManager().getConfiguration().getDefaultCustomToscaFunctions();
if (customFunctions.isEmpty()) {
return ToscaFunctionType.CUSTOM;
}
Optional<Configuration.CustomToscaFunction> optionalFunc = customFunctions.stream().filter(func -> func.getName().equals(name)).findFirst();
if (optionalFunc.isEmpty()) {
return ToscaFunctionType.CUSTOM;
}
String type = optionalFunc.get().getType();
return ToscaFunctionType.findType(type).get();
}
private void validateGetInput(ToscaCustomFunction toscaCustomFunction, final DeserializationContext context) throws IOException {
List<ToscaFunctionParameter> functionParameterList = toscaCustomFunction.getParameters();
if (functionParameterList.size() != 1) {
throw context.instantiationException(List.class, "Custom GET_INPUT function must contain one GET_INPUT parameter");
}
ToscaFunctionParameter parameter = functionParameterList.get(0);
if (!ToscaFunctionType.GET_INPUT.equals(parameter.getType())) {
throw context.instantiationException(List.class, "Custom GET_INPUT function must contain a GET_INPUT parameter");
}
}
private List<ToscaFunctionParameter> getParameters(final JsonNode functionJsonNode, final DeserializationContext context) throws IOException {
final List<ToscaFunctionParameter> functionParameterList = new ArrayList<>();
final JsonNode parametersNode = functionJsonNode.get("parameters");
if (parametersNode == null) {
return functionParameterList;
}
if (!parametersNode.isArray()) {
throw context.instantiationException(List.class, "Expecting an array for the 'parameters' entry");
}
for (final JsonNode parameterNode : parametersNode) {
final JsonNode typeJsonNode = parameterNode.get("type");
if (typeJsonNode == null) {
throw context.instantiationException(ToscaFunction.class, "TOSCA function parameter type attribute not provided");
}
final String parameterType = typeJsonNode.asText();
final ToscaFunctionType toscaFunctionType = ToscaFunctionType.findType(parameterType)
.orElseThrow(() -> context.instantiationException(ToscaFunction.class,
String.format("Invalid TOSCA function parameter type '%s'", parameterType))
);
if (toscaFunctionType == ToscaFunctionType.STRING) {
final ToscaStringParameter toscaStringParameter = new ToscaStringParameter();
toscaStringParameter.setValue(parameterNode.get("value").asText());
functionParameterList.add(toscaStringParameter);
} else {
final ToscaFunction toscaFunction = this.deserializeToscaFunction(parameterNode, context);
functionParameterList.add((ToscaFunctionParameter) toscaFunction);
}
}
return functionParameterList;
}
}
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