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/*-
* ============LICENSE_START=======================================================
* ONAP - SO
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.mso.jsonpath;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.jayway.jsonpath.Configuration;
import com.jayway.jsonpath.JsonPath;
import com.jayway.jsonpath.Option;
import com.jayway.jsonpath.spi.json.JacksonJsonNodeJsonProvider;
public class JsonPathUtil {
private final Configuration conf;
private JsonPathUtil() {
conf = Configuration.defaultConfiguration().jsonProvider(new JacksonJsonNodeJsonProvider()).addOptions(Option.ALWAYS_RETURN_LIST, Option.SUPPRESS_EXCEPTIONS);
}
private static class Helper {
private static final JsonPathUtil INSTANCE = new JsonPathUtil();
}
public static JsonPathUtil getInstance() {
return Helper.INSTANCE;
}
public boolean pathExists(String json, String jsonPath) {
return JsonPath.using(conf).parse(json).<ArrayNode>read(jsonPath).size() != 0;
}
public Optional<String> locateResult(String json, String jsonPath) {
final ArrayNode result = JsonPath.using(conf).parse(json).read(jsonPath);
if (result.size() == 0) {
return Optional.empty();
} else {
if (result.get(0).isValueNode()) {
return Optional.of(result.get(0).asText());
} else {
return Optional.of(result.get(0).toString());
}
}
}
public List<String> locateResultList(String json, String jsonPath) {
final ArrayNode resultNodes = JsonPath.using(conf).parse(json).read(jsonPath);
final ArrayList<String> result = new ArrayList<>();
for (JsonNode node : resultNodes) {
if (node.isValueNode()) {
result.add(node.asText());
} else {
result.add(node.toString());
}
}
return result;
}
}
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