lib/kerby-event/src/main/java/org/apache/kerby/transport/buffer/BufferUtil.java

/**
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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.kerby.transport.buffer;

import java.nio.BufferOverflowException;
import java.nio.ByteBuffer;

public class BufferUtil {

    /**
     * Read len bytes from src buffer
     */
    public static ByteBuffer read(ByteBuffer src, int len) {
        if (len > src.remaining())
            throw new BufferOverflowException();

        ByteBuffer result = ByteBuffer.allocate(len);
        int n = src.remaining();
        for (int i = 0; i < n; i++) {
            result.put(src.get());
        }

        return result;
    }
}