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package com.firefly.codec.http2.encode;

import java.nio.ByteBuffer;

import com.firefly.codec.http2.frame.Frame;
import com.firefly.codec.http2.frame.FrameType;

public class HeaderGenerator {
	private int maxFrameSize = Frame.DEFAULT_MAX_LENGTH;
	
	public ByteBuffer generate(FrameType frameType, int capacity, int length, int flags, int streamId) {
		ByteBuffer header = ByteBuffer.allocate(capacity);
		header.put((byte)((length & 0x00_FF_00_00) >>> 16));
        header.put((byte)((length & 0x00_00_FF_00) >>> 8));
        header.put((byte)((length & 0x00_00_00_FF)));
        header.put((byte)frameType.getType());
        header.put((byte)flags);
        header.putInt(streamId);
        return header;
	}

	public int getMaxFrameSize() {
		return maxFrameSize;
	}

	public void setMaxFrameSize(int maxFrameSize) {
		this.maxFrameSize = maxFrameSize;
	}
	
}