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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.collections.Predicate;
import org.osgi.framework.Bundle;

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

/**
 * {@link #evaluate(Object)} returns false if the bundle matches to
 * signal
 * {@link org.apache.commons.collections.CollectionUtils#filter(java.util.Collection, Predicate)}
 * to remove the element it.
 * 
 * Works only on collections of {@link OsgiBeanSource}.
 * 
 * @author Olaf Otto
 */
public class MatchedBundlesPredicate implements Predicate {
    private final Bundle bundle;
    private int filteredElements = 0;

    public MatchedBundlesPredicate(Bundle bundle) {
        notNull(bundle, "Constructor parameter bundle must not be null.");
        this.bundle = bundle;
    }

    @Override
    public boolean evaluate(Object object) {
        boolean keep = ((OsgiBeanSource) object).getBundleId() != bundle.getBundleId();
        if (!keep) {
            ++filteredElements;
        }
        return keep;
    }

    public int getFilteredElements() {
        return filteredElements;
    }
}