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* See LICENSE.md for licensing information.

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

package org.usb4java;

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

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

/**

* A structure representing the Binary Device Object Store (BOS) descriptor.

* This descriptor is documented in section 9.6.2 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 BosDescriptor

{

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

private long bosDescriptorPointer;

/**

* Constructs a new BOS descriptor which can be passed to the

* {@link LibUsb#getBosDescriptor(DeviceHandle, BosDescriptor)} method.

public BosDescriptor()

{

// Empty

}

/**

* Returns the native pointer.

* @return The native pointer.

public long getPointer()

{

return this.bosDescriptorPointer;

}

/**

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

* @return The descriptor size in bytes;

public native byte bLength();

/**

* Returns the descriptor type.

* @return The descriptor type.

public native byte bDescriptorType();

/**

* Returns the length of this descriptor and all of its sub descriptors.

* @return The total descriptor length.

public native short wTotalLength();

/**

* Returns the number of separate device capability descriptors in the BOS.

* @return The number of device capability descriptors.

public native byte bNumDeviceCaps();

/**

* Returns the array with the device capability descriptors.

* @return The array with device capability descriptors.

public native BosDevCapabilityDescriptor[] devCapability();

/**

* Returns a dump of this descriptor.

* @return The descriptor dump.

public String dump()

{

final StringBuilder builder = new StringBuilder();

builder.append(String.format(

"BOS Descriptor:%n" +

" bLength %18d%n" +

" bDescriptorType %10d%n" +

" wTotalLength %13s%n" +

" bNumDeviceCaps %11s%n",

this.bLength() & 0xFF,

this.bDescriptorType() & 0xFF,

this.wTotalLength() & 0xFFFF,

this.bNumDeviceCaps() & 0xFF));

for (final BosDevCapabilityDescriptor descriptor : this.devCapability())

{

builder.append(descriptor.dump().replaceAll("(?m)^", " "));

}

return builder.toString();

}

@Override

public int hashCode()

{

return new HashCodeBuilder()

.append(this.bLength())

.append(this.bDescriptorType())

.append(this.wTotalLength())

.append(this.bNumDeviceCaps())

.append(this.devCapability())

.toHashCode();

}

@Override

public boolean equals(final Object obj)

{

if (obj == null)

{

return false;

}

if (obj == this)

{

return true;

}

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

{

return false;

}

final BosDescriptor other = (BosDescriptor) obj;

return new EqualsBuilder()

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

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

.append(this.wTotalLength(), other.wTotalLength())

.append(this.bNumDeviceCaps(), other.bNumDeviceCaps())

.append(this.devCapability(), other.devCapability())

.isEquals();

}

@Override

public String toString()

{

return this.dump();

}

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