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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.Optional;
import com.jayway.jsonpath.Configuration;
import com.jayway.jsonpath.JsonPath;
import com.jayway.jsonpath.Option;
import net.minidev.json.JSONArray;
public class JsonPathUtil {
private final Configuration conf;
private JsonPathUtil() {
conf = Configuration.defaultConfiguration().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).<JSONArray>read(jsonPath).isEmpty();
}
public <T> Optional<T> locateResult(String json, String jsonPath) {
final JSONArray result = JsonPath.using(conf).parse(json).read(jsonPath);
if (result.isEmpty()) {
return Optional.empty();
} else {
return Optional.of((T)result.get(0));
}
}
}
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