framework/src/main/java/org/apache/felix/framework/util/ListenerInfo.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.felix.framework.util;

import java.util.EventListener;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Filter;
import org.osgi.framework.hooks.service.ListenerHook;


public class ListenerInfo implements ListenerHook.ListenerInfo
{
    private final Bundle m_bundle;
    private final BundleContext m_context;
    private final Class m_listenerClass;
    private final EventListener m_listener;
    private final Filter m_filter;
    private final Object m_acc;
    private final boolean m_removed;

    public ListenerInfo(
        Bundle bundle, BundleContext context, Class listenerClass, EventListener listener,
        Filter filter, Object acc, boolean removed)
    {
        // Technically, we could get the bundle from the bundle context, but
        // there are some corner cases where the bundle context might become
        // invalid and we still need the bundle.
        m_bundle = bundle;
        m_context = context;
        m_listenerClass = listenerClass;
        m_listener = listener;
        m_filter = filter;
        m_acc = acc;
        m_removed = removed;
    }

    public ListenerInfo(ListenerInfo info, boolean removed)
    {
        m_bundle = info.m_bundle;
        m_context = info.m_context;
        m_listenerClass = info.m_listenerClass;
        m_listener = info.m_listener;
        m_filter = info.m_filter;
        m_acc = info.m_acc;
        m_removed = removed;
    }

    public Bundle getBundle()
    {
        return m_bundle;
    }

    public BundleContext getBundleContext()
    {
        return m_context;
    }

    public Class getListenerClass()
    {
        return m_listenerClass;
    }

    public EventListener getListener()
    {
        return m_listener;
    }

    public Filter getParsedFilter()
    {
        return m_filter;
    }

    public String getFilter()
    {
        if (m_filter != null)
        {
            return m_filter.toString();
        }
        return null;
    }

    public Object getSecurityContext()
    {
        return m_acc;
    }

    public boolean isRemoved()
    {
        return m_removed;
    }

    @Override
    public boolean equals(Object obj)
    {
        if (obj == this)
        {
            return true;
        }

        if (!(obj instanceof ListenerInfo))
        {
            return false;
        }

        ListenerInfo other = (ListenerInfo) obj;
        return (other.m_bundle == m_bundle)
            && (other.m_context == m_context)
            && (other.m_listenerClass == m_listenerClass)
            && (other.m_listener == m_listener)
            && (m_filter == null ? other.m_filter == null : m_filter.equals(other.m_filter));
    }

    @Override
    public int hashCode()
    {
        int hash = 7;
        hash = 59 * hash + (this.m_bundle != null ? this.m_bundle.hashCode() : 0);
        hash = 59 * hash + (this.m_context != null ? this.m_context.hashCode() : 0);
        hash = 59 * hash + (this.m_listenerClass != null ? this.m_listenerClass.hashCode() : 0);
        hash = 59 * hash + (this.m_listener != null ? this.m_listener.hashCode() : 0);
        hash = 59 * hash + (this.m_filter != null ? this.m_filter.hashCode() : 0);
        return hash;
    }
}