NullParametersCallback.java

/*
 * Copyright 2006-2012 The Scriptella Project Team.
 *
 * 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 scriptella.spi.support;

import scriptella.spi.ParametersCallback;

/**
 * Null-object constant for {@link ParametersCallback}.
 *
 * @author Fyodor Kupolov
 * @version 1.0
 */
public class NullParametersCallback implements ParametersCallback {
    public static final ParametersCallback INSTANCE = new NullParametersCallback();

    /**
     * Singleton.
     */
    private NullParametersCallback() {
    }


    /**
     * Always return null.
     *
     * @param name parameter name.
     * @return null.
     */
    public Object getParameter(final String name) {
        return null;
    }
}