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Contains the entire NEBA core implementation, i.e. the framework that interprets the NEBA API annotations and provides implementations for the service and lifecycle callback interfaces provided in the NEBA API. This package must not export anything as its implementation details are entirely private.

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/**
 * Copyright 2013 the original author or authors.
 * 
 * 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.
**/

package io.neba.core.util;

import org.apache.commons.lang.builder.HashCodeBuilder;

import static org.springframework.util.Assert.notNull;

/**
 * References a bean from a {@link org.osgi.framework.Bundle}.
 *
 * @param  the type of the bean.
 * @author Olaf Otto
 */
public class OsgiBeanReference {
    private final T bean;
    private final long bundleId;
    private final Class beanClass;
    private final int hashCode;

    public OsgiBeanReference(T bean, long bundleId) {
        notNull(bean, "Constructor argument bean must not be null.");
        this.bean = bean;
        this.bundleId = bundleId;
        this.beanClass = bean.getClass();
        this.hashCode = new HashCodeBuilder().append(beanClass.getName()).append(bundleId).toHashCode();
    }

    public T getBean() {
        return bean;
    }

    public long getBundleId() {
        return bundleId;
    }

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

    @Override
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (obj == null || obj.getClass() != getClass()) {
            return false;
        }

        OsgiBeanReference other = (OsgiBeanReference) obj;

        return this.bundleId == other.bundleId &&
                this.beanClass.getName().equals(other.beanClass.getName());
    }

    @Override
    public String toString() {
        return "Bean with type " + '"' + this.beanClass.getName() + '"' + " from bundle with id " + this.bundleId;
    }
}