org.apache.activemq.artemis.utils.JsonLoader Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.activemq.artemis.utils;
import javax.json.JsonArray;
import javax.json.JsonArrayBuilder;
import javax.json.JsonObject;
import javax.json.JsonObjectBuilder;
import javax.json.JsonReader;
import javax.json.spi.JsonProvider;
import java.io.Reader;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
* This is to make sure we use the proper classLoader to load JSon libraries.
* This is equivalent to using {@link javax.json.Json}
*/
public class JsonLoader {
private static final JsonProvider provider;
static {
provider = loadProvider();
}
private static JsonProvider loadProvider() {
return AccessController.doPrivileged(new PrivilegedAction() {
@Override
public JsonProvider run() {
ClassLoader originalLoader = Thread.currentThread().getContextClassLoader();
try {
Thread.currentThread().setContextClassLoader(JsonLoader.class.getClassLoader());
return JsonProvider.provider();
} finally {
Thread.currentThread().setContextClassLoader(originalLoader);
}
}
});
}
public static JsonObject readObject(Reader reader) {
try (JsonReader jsonReader = provider.createReader(reader)) {
return jsonReader.readObject();
}
}
public static JsonArray readArray(Reader reader) {
try (JsonReader jsonReader = provider.createReader(reader)) {
return jsonReader.readArray();
}
}
public static JsonArrayBuilder createArrayBuilder() {
return provider.createArrayBuilder();
}
public static JsonObjectBuilder createObjectBuilder() {
return provider.createObjectBuilder();
}
}
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