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/*
* Copyright © 2017-2018 AT&T Intellectual Property.
* Modifications Copyright © 2018 IBM.
*
* 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.ccsdk.config.model.utils;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.apache.commons.lang3.StringUtils;
import org.onap.ccsdk.config.model.ConfigModelConstant;
import org.onap.ccsdk.config.model.data.PropertyDefinition;
import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
public class ExpressionUtils {
private static EELFLogger logger = EELFManager.getInstance().getLogger(ExpressionUtils.class);
private final SvcLogicContext context;
private final Map<String, String> inParams;
public ExpressionUtils(final SvcLogicContext context, final Map<String, String> inParams) {
this.context = context;
this.inParams = inParams;
}
public void populatePropertAssignmentsWithPrefix(String prefix, Map<String, PropertyDefinition> typeProperties,
Map<String, Object> templateProperties) throws IOException {
if (typeProperties != null && templateProperties != null) {
ObjectMapper mapper = new ObjectMapper();
String templatejsonContent = mapper.writeValueAsString(templateProperties);
logger.debug("Expression inputs ({}).", templatejsonContent);
JsonNode rootArray = mapper.readTree(templatejsonContent);
processJsonExpression(rootArray);
if (rootArray != null) {
Map<String, String> prefixParams = new HashMap<>();
TransformationUtils.convertJson2RootProperties(prefixParams, rootArray);
logger.info("Resolved inputs ({}).", rootArray);
prefixParams.forEach((key, value) -> {
this.inParams.put(prefix + "." + key, value);
});
}
}
}
public void populatePropertAssignments(Map<String, PropertyDefinition> typeProperties,
Map<String, Object> templateProperties) throws IOException {
if (typeProperties != null && templateProperties != null) {
ObjectMapper mapper = new ObjectMapper();
String templatejsonContent = mapper.writeValueAsString(templateProperties);
logger.info("Expression inputs ({}).", templatejsonContent);
JsonNode rootArray = mapper.readTree(templatejsonContent);
processJsonExpression(rootArray);
TransformationUtils.convertJson2RootProperties(this.inParams, rootArray);
logger.info("Resolved inputs ({}).", rootArray);
}
}
public void populateOutPropertAssignments(Map<String, PropertyDefinition> typeProperties,
Map<String, Object> templateProperties) throws IOException {
if (typeProperties != null && templateProperties != null) {
ObjectMapper mapper = new ObjectMapper();
String templatejsonContent = mapper.writeValueAsString(templateProperties);
logger.info("Expression outputs ({}).", templatejsonContent);
JsonNode rootArray = mapper.readTree(templatejsonContent);
processJsonExpression(rootArray);
logger.info("Resolved outputs ({}).", rootArray);
}
}
public void processJsonExpression(JsonNode rootArray) throws IOException {
if (rootArray != null) {
Iterator<Map.Entry<String, JsonNode>> fields = rootArray.fields();
while (fields.hasNext()) {
Map.Entry<String, JsonNode> entry = fields.next();
processJsonNode(rootArray, entry.getKey(), entry.getValue());
}
}
}
private void processJsonNode(JsonNode parentNode, String nodeName, JsonNode node) throws IOException {
if (node == null) {
// Do Nothing
} else if (node.isArray()) {
String[] a = new String[node.size()];
for (int i = 0; i < a.length; i++) {
processJsonNode(null, null, node.get(i));
}
} else if (node.isObject()) {
Iterator<Map.Entry<String, JsonNode>> fields = node.fields();
while (fields.hasNext()) {
Map.Entry<String, JsonNode> entry = fields.next();
processJsonNode(node, entry.getKey(), entry.getValue());
}
} else if (node.isTextual()) {
boolean expression = checkExpressionContent(node.asText());
if (expression) {
processExpressionContent(parentNode, nodeName, node);
}
}
}
private boolean checkExpressionContent(String content) {
return (StringUtils.isNotBlank(content) && (content.contains(ConfigModelConstant.EXPRESSION_GET_INPUT)
|| content.contains(ConfigModelConstant.EXPRESSION_GET_ATTRIBUTE)
|| content.contains(ConfigModelConstant.EXPRESSION_SET_VALUE)));
}
@SuppressWarnings("squid:S3776")
private void processExpressionContent(JsonNode parentNode, String nodeName, JsonNode node) throws IOException {
if (node != null && StringUtils.isNotBlank(node.asText())) {
String content = node.asText();
ObjectMapper mapper = new ObjectMapper();
Map<String, String> expressionMap = mapper.readValue(content, Map.class);
boolean isExpressionNode = false;
if (expressionMap != null) {
String expressionValue = null;
String expressionKey = null;
if (expressionMap.containsKey(ConfigModelConstant.EXPRESSION_GET_INPUT)) {
isExpressionNode = true;
expressionKey = expressionMap.get(ConfigModelConstant.EXPRESSION_GET_INPUT);
expressionValue = resolveGetInputExpression(expressionKey, context);
if (expressionValue == null) {
expressionValue = resolveGetInputExpression("inputs." + expressionKey + ".default", context);
}
} else if (expressionMap.containsKey(ConfigModelConstant.EXPRESSION_GET_ATTRIBUTE)) {
isExpressionNode = true;
expressionValue =
context.getAttribute(expressionMap.get(ConfigModelConstant.EXPRESSION_GET_ATTRIBUTE));
} else if (expressionMap.containsKey(ConfigModelConstant.EXPRESSION_SET_VALUE)) {
isExpressionNode = true;
expressionKey = expressionMap.get(ConfigModelConstant.EXPRESSION_SET_VALUE);
expressionValue = context.getAttribute(expressionKey);
if (StringUtils.isNotBlank(expressionKey)) {
context.setAttribute(expressionKey, expressionValue);
}
}
if (isExpressionNode && expressionValue == null) {
((ObjectNode) parentNode).put(nodeName, "");
}
if (StringUtils.isNotBlank(expressionValue)) {
if (expressionValue.trim().startsWith("[") || expressionValue.trim().startsWith("{")) {
JsonNode valueNode = mapper.readTree(expressionValue);
((ObjectNode) parentNode).put(nodeName, valueNode);
} else {
((ObjectNode) parentNode).put(nodeName, expressionValue);
}
}
logger.debug("expression ({}), expression key ({}), expression Value ({})", expressionMap,
expressionKey, expressionValue);
}
}
}
private String resolveGetInputExpression(String key, final SvcLogicContext context) {
if (StringUtils.isNotBlank(key) && context != null) {
return context.getAttribute(key);
}
return null;
}
}
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