/*
 * 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.
 *
 * Other licenses:
 * -----------------------------------------------------------------------------
 * Commercial licenses for this work are available. These replace the above
 * ASL 2.0 and offer limited warranties, support, maintenance, and commercial
 * database integrations.
 *
 * For more information, please visit: http://www.jooq.org/licenses
 *
 *
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 *
 *
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 *
 */
package org.jooq.impl;

import java.io.Serializable;

import org.jooq.VisitListener;
import org.jooq.VisitListenerProvider;

/**
 * A default implementation for {@link VisitListenerProvider}.
 * <p>
 * This implementation just wraps an instance of {@link VisitListener}, always
 * providing the same.
 *
 * @author Lukas Eder
 */
public class DefaultVisitListenerProvider implements VisitListenerProvider, Serializable {

    /**
     * Generated UID.
     */
    private static final long     serialVersionUID = -2122007794302549679L;

    /**
     * The delegate listener.
     */
    private final VisitListener listener;

    /**
     * Convenience method to construct an array of
     * <code>DefaultVisitListenerProvider</code> from an array of
     * <code>VisitListener</code> instances.
     */
    public static VisitListenerProvider[] providers(VisitListener... listeners) {
        VisitListenerProvider[] result = new VisitListenerProvider[listeners.length];

        for (int i = 0; i < listeners.length; i++)
            result[i] = new DefaultVisitListenerProvider(listeners[i]);

        return result;
    }

    /**
     * Create a new provider instance from an argument listener.
     *
     * @param listener The argument listener.
     */
    public DefaultVisitListenerProvider(VisitListener listener) {
        this.listener = listener;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public final VisitListener provide() {
        return listener;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String toString() {
        return listener.toString();
    }
}