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/*
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2007-2008 Sun Microsystems, Inc. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
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 * Contributor(s):
 *
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
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package org.glassfish.grizzly.util;

import java.util.logging.Level;
import java.util.logging.Logger;
import org.glassfish.grizzly.Buffer;
import org.glassfish.grizzly.Grizzly;
import org.glassfish.grizzly.ReadResult;
import org.glassfish.grizzly.util.conditions.Condition;

/**
 *
 * @author oleksiys
 */
public class MinBufferSizeCondition implements Condition> {
    private Logger logger = Grizzly.logger;
    
    public static final int FULL_BUFFER = -1;
    
    private int minSize;
    
    public MinBufferSizeCondition() {
        this(FULL_BUFFER);
    }

    public MinBufferSizeCondition(int minSize) {
        this.minSize = minSize;
    }

    public boolean check(ReadResult currentResult) {
        Buffer message = currentResult.getMessage();

        if (logger.isLoggable(Level.FINEST)) {
            logger.finest("check result. MinSize=" + minSize +
                    " Result=" + currentResult + " message=" + message);
        }
        
        if (message == null) return false;
        
        if (minSize > FULL_BUFFER) {
            return message.remaining() >= minSize;
        } else {
            return message.remaining() == message.capacity();
        }
    }
}