import org.apache.http.util.Args; //导入方法依赖的package包/类

/**

* Creates new instance of BHttpConnectionBase.

*

* @param buffersize buffer size. Must be a positive number.

* @param fragmentSizeHint fragment size hint.

* @param chardecoder decoder to be used for decoding HTTP protocol elements.

* If null simple type cast will be used for byte to char conversion.

* @param charencoder encoder to be used for encoding HTTP protocol elements.

* If null simple type cast will be used for char to byte conversion.

* @param constraints Message constraints. If null

* {@link MessageConstraints#DEFAULT} will be used.

* @param incomingContentStrategy incoming content length strategy. If null

* {@link LaxContentLengthStrategyHC4#INSTANCE} will be used.

* @param outgoingContentStrategy outgoing content length strategy. If null

* {@link StrictContentLengthStrategyHC4#INSTANCE} will be used.

*/

protected BHttpConnectionBase(

final int buffersize,

final int fragmentSizeHint,

final CharsetDecoder chardecoder,

final CharsetEncoder charencoder,

final MessageConstraints constraints,

final ContentLengthStrategy incomingContentStrategy,

final ContentLengthStrategy outgoingContentStrategy) {

super();

Args.positive(buffersize, "Buffer size");

final HttpTransportMetricsImpl inTransportMetrics = new HttpTransportMetricsImpl();

final HttpTransportMetricsImpl outTransportMetrics = new HttpTransportMetricsImpl();

this.inbuffer = new SessionInputBufferImpl(inTransportMetrics, buffersize, -1,

constraints != null ? constraints : MessageConstraints.DEFAULT, chardecoder);

this.outbuffer = new SessionOutputBufferImpl(outTransportMetrics, buffersize, fragmentSizeHint,

charencoder);

this.connMetrics = new HttpConnectionMetricsImpl(inTransportMetrics, outTransportMetrics);

this.incomingContentStrategy = incomingContentStrategy != null ? incomingContentStrategy :

LaxContentLengthStrategyHC4.INSTANCE;

this.outgoingContentStrategy = outgoingContentStrategy != null ? outgoingContentStrategy :

StrictContentLengthStrategyHC4.INSTANCE;

}