src/main/java/org/apache/sling/scripting/sightly/impl/engine/RuntimeExtensionReference.java

/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 ~ 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.sling.scripting.sightly.impl.engine;

import org.apache.sling.commons.osgi.PropertiesUtil;
import org.apache.sling.scripting.sightly.extension.RuntimeExtension;
import org.jetbrains.annotations.NotNull;
import org.osgi.framework.Constants;
import org.osgi.framework.ServiceReference;

class RuntimeExtensionReference implements Comparable<RuntimeExtensionReference> {
    private final int priority;
    private final String name;
    private ServiceReference<RuntimeExtension> serviceReference;
    private RuntimeExtension runtimeExtension;

    RuntimeExtensionReference(ServiceReference<RuntimeExtension> serviceReference, RuntimeExtension runtimeExtension) {
        this.serviceReference = serviceReference;
        this.runtimeExtension = runtimeExtension;
        priority = PropertiesUtil.toInteger(serviceReference.getProperty(Constants.SERVICE_RANKING), 0);
        name = PropertiesUtil.toString(serviceReference.getProperty(RuntimeExtension.NAME), "");
    }

    @Override
    public int compareTo(@NotNull RuntimeExtensionReference other) {
        if (equals(other)) {
            return 0;
        }
        if (name.equals(other.name)) {
            return priority - other.priority;
        }
        return -1;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof RuntimeExtensionReference) {
            RuntimeExtensionReference other = (RuntimeExtensionReference) obj;
            return serviceReference.equals(other.serviceReference);
        }
        return false;
    }

    @Override
    public int hashCode() {
        return serviceReference.hashCode();
    }

    public String getName() {
        return name;
    }

    ServiceReference<RuntimeExtension> getServiceReference() {
        return serviceReference;
    }

    synchronized RuntimeExtension getService() {
        return runtimeExtension;
    }

}