/*
 * 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.openejb.assembler.classic.event;

import org.apache.openejb.assembler.classic.Assembler;

import javax.naming.NamingException;

public abstract class ResourceEvent {
    protected final String name;
    protected final Object resource;
    protected Object replacement;

    protected ResourceEvent(final String name, final Object resource) {
        this.name = name;
        this.resource = resource;
    }

    public String getName() {
        return name;
    }

    public Object getRawResource() {
        return resource;
    }

    public Object getResource() {
        try {
            return !Assembler.ResourceInstance.class.isInstance(resource) ? resource : Assembler.ResourceInstance.class.cast(resource).getObject();
        } catch (final NamingException e) {
            throw new IllegalStateException(e);
        }
    }

    public boolean is(final Class<?> type) {
        try {
            return type.isInstance(resource) ||
                    (Assembler.ResourceInstance.class.isInstance(resource) &&
                            type.isInstance(Assembler.ResourceInstance.class.cast(resource).getObject()));
        } catch (final NamingException e) {
            return false;
        }
    }

    public void replaceBy(final Object newResource) {
        this.replacement = newResource;
    }

    public Object getReplacement() {
        return replacement;
    }

    @Override
    public String toString() {
        return getClass().getSimpleName() + "{" + name + "}";
    }
}
