/**
 * Copyright 2007-2016, Kaazing Corporation. All rights reserved.
 *
 * 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 org.apache.mina.filter.buffer;

import org.apache.mina.core.buffer.IoBuffer;
import org.apache.mina.util.LazyInitializer;

/**
 * An {@link LazyInitializer} implementation that initializes an 
 * {@link IoBuffer} only when needed.
 * 
 * @author <a href="http://mina.apache.org">Apache MINA Project</a>
 * @since MINA 2.0.0-M2
 */
public class IoBufferLazyInitializer extends LazyInitializer<IoBuffer> {

    /**
     * The buffer size allocated for each new session's buffer.
     */
    private int bufferSize;

    /**
     * Constructor which sets allocated buffer size to <code>bufferSize</code>.
     * 
     * @param bufferSize the new buffer size
     */
    public IoBufferLazyInitializer(int bufferSize) {
        this.bufferSize = bufferSize;
    }

    /**
     * {@inheritDoc}
     */
    public IoBuffer init() {
        return IoBuffer.allocate(bufferSize);
    }
}