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* See LICENSE.md for licensing information.

* Based on libusb <http://libusb.info/>:

package org.usb4java;

import java.nio.ByteBuffer;

import org.apache.commons.lang3.builder.EqualsBuilder;

import org.apache.commons.lang3.builder.HashCodeBuilder;

/**

* A structure representing the standard USB endpoint descriptor.

* This descriptor is documented in section 9.6.6 of the USB 3.0 specification.

* All multiple-byte fields are represented in host-endian format.

* @author Klaus Reimer (k@ailis.de)

public final class EndpointDescriptor

{

/** The native pointer to the descriptor structure. */

private long endpointDescriptorPointer;

/**

* Package-private constructor to prevent manual instantiation. Endpoint

* descriptors are always created by JNI.

EndpointDescriptor()

{

// Empty

}

/**

* Returns the native pointer.

* @return The native pointer.

public long getPointer()

{

return this.endpointDescriptorPointer;

}

/**

* Returns the size of this descriptor (in bytes).

* @return The size of this descriptor (in bytes).

public native byte bLength();

/**

* Returns the descriptor type. Will have value {@link LibUsb#DT_ENDPOINT}

* in this context.

* @return The descriptor type.

public native byte bDescriptorType();

/**

* The address of the endpoint described by this descriptor. Bits 0:3 are

* the endpoint number. Bits 4:6 are reserved. Bit 7 indicates direction

* (Either {@link LibUsb#ENDPOINT_IN} or {@link LibUsb#ENDPOINT_OUT}).

* @return The endpoint address.

public native byte bEndpointAddress();

/**

* Attributes which apply to the endpoint when it is configured using the

* bConfigurationValue. Bits 0:1 determine the transfer type and correspond

* to the LibUsb.TRANSFER_TYPE_* constants. Bits 2:3 are only used for

* isochronous endpoints and correspond to the LibUsb.ISO_SYNC_TYPE_*

* constants. Bits 4:5 are also only used for isochronous endpoints and

* correspond to the LibUsb.ISO_USAGE_TYPE_* constants. Bits 6:7 are

* reserved.

* @return The attributes.

public native byte bmAttributes();

/**

* Returns the maximum packet size this endpoint is capable of

* sending/receiving.

* @return The maximum packet size.

public native short wMaxPacketSize();

/**

* Returns the interval for polling endpoint for data transfers.

* @return The polling interval.

public native byte bInterval();

/**

* For audio devices only: the rate at which synchronization feedback is

* provided.

* @return The synchronization feedback rate.

public native byte bRefresh();

/**

* For audio devices only: the address of the synch endpoint.

* @return The synch endpoint address.

public native byte bSynchAddress();

/**

* Extra descriptors.

* If libusb encounters unknown endpoint descriptors, it will store them

* here, should you wish to parse them.

* @return The extra descriptors.

public native ByteBuffer extra();

/**

* Length of the extra descriptors, in bytes.

* @return The extra descriptors length.

public native int extraLength();

/**

* Returns a dump of this descriptor.

* @return The descriptor dump.

public String dump()

{

return String.format(

"%s" +

" extralen %17d%n" +

" extra:%n" +

"%s",

DescriptorUtils.dump(this),

this.extraLength(),

DescriptorUtils.dump(this.extra()).replaceAll("(?m)^", " "));

}

@Override

public int hashCode()

{

return new HashCodeBuilder()

.append(this.bLength())

.append(this.bDescriptorType())

.append(this.bEndpointAddress())

.append(this.bmAttributes())

.append(this.wMaxPacketSize())

.append(this.bInterval())

.append(this.bRefresh())

.append(this.bSynchAddress())

.append(this.extra())

.append(this.extraLength())

.toHashCode();

}

@Override

public boolean equals(final Object obj)

{

if (this == obj)

{

return true;

}

if (obj == null)

{

return false;

}

if (this.getClass() != obj.getClass())

{

return false;

}

final EndpointDescriptor other = (EndpointDescriptor) obj;

return new EqualsBuilder()

.append(this.bLength(), other.bLength())

.append(this.bDescriptorType(), other.bDescriptorType())

.append(this.bEndpointAddress(), other.bEndpointAddress())

.append(this.bmAttributes(), other.bmAttributes())

.append(this.wMaxPacketSize(), other.wMaxPacketSize())

.append(this.bInterval(), other.bInterval())

.append(this.bRefresh(), other.bRefresh())

.append(this.bSynchAddress(), other.bSynchAddress())

.append(this.extra(), other.extra())

.append(this.extraLength(), other.extraLength())

.isEquals();

}

@Override

public String toString()

{

return this.dump();

}

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