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/*-
* ============LICENSE_START=======================================================
* PROJECT
* ================================================================================
* Copyright (C) 2018 Nokia Networks 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.onap.dcae.commonFunction;
import static io.vavr.API.Set;
import io.vavr.collection.List;
import io.vavr.collection.Set;
import io.vavr.control.Option;
import java.util.stream.StreamSupport;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
/**
* This class is a wrapper for 2 most used entities of org.json lib: JSONArray and JSONObject and comprises utility
* methods for fast access of json structures without need to explicitly coerce between them. While using this, bear in
* mind it does not contain exception handling - it is assumed that when using, the parsed json structure is known.
*
* @author koblosz
*/
public class AnyNode {
private Object obj;
private AnyNode(Object object) {
this.obj = object;
}
public static AnyNode fromString(String content) {
return new AnyNode(new JSONObject(content));
}
/**
* Returns key set of underlying object. It is assumed that underlying object is of type org.json.JSONObject.
*/
public Set<String> keys() {
return Set(asJsonObject().keySet().toArray(new String[]{}));
}
/**
* Returns value associated with specified key wrapped with AnyValue object. It is assumed that this is of type
* org.json.JSONObject.
*/
public AnyNode get(String key) {
return new AnyNode(asJsonObject().get(key));
}
/**
* Returns string representation of this. If it happens to have null, the value is treated as
* org.json.JSONObject.NULL and "null" string is returned then.
*/
public String toString() {
return this.obj.toString();
}
/**
* Returns optional of object under specified key, wrapped with AnyNode object.
* If underlying object is not of type org.json.JSONObject
* or underlying object has no given key
* or given key is null
* then Optional.empty will be returned.
*/
public Option<AnyNode> getAsOption(String key) {
try {
AnyNode value = get(key);
if (value.toString().equals("null")) {
return Option.none();
}
return Option.some(value);
} catch (JSONException ex) {
return Option.none();
}
}
/**
* Converts underlying object to map representation with map values wrapped with AnyNode object. It is assumed that
* underlying object is of type org.json.JSONObject.
*/
public List<AnyNode> toList() {
return List.ofAll(StreamSupport.stream(((JSONArray) this.obj).spliterator(), false).map(AnyNode::new));
}
/**
* Checks if specified key is present in this. It is assumed that this is of type JSONObject.
*/
public boolean has(String key) {
return !getAsOption(key).isEmpty();
}
private JSONObject asJsonObject() {
return (JSONObject) this.obj;
}
}
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