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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed 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 android.hardware.usb;
import android.os.Bundle;
import android.os.Parcel;
import android.os.Parcelable;
/**
* A class representing an interface on a {@link UsbDevice}.
* USB devices can have one or more interfaces, each one providing a different
* piece of functionality, separate from the other interfaces.
* An interface will have one or more {@link UsbEndpoint}s, which are the
* channels by which the host transfers data with the device.
*
* <div class="special reference">
* <h3>Developer Guides</h3>
* <p>For more information about communicating with USB hardware, read the
* <a href="{@docRoot}guide/topics/usb/index.html">USB</a> developer guide.</p>
* </div>
*/
public class UsbInterface implements Parcelable {
private final int mId;
private final int mClass;
private final int mSubclass;
private final int mProtocol;
private final Parcelable[] mEndpoints;
/**
* UsbInterface should only be instantiated by UsbService implementation
* @hide
*/
public UsbInterface(int id, int Class, int subClass, int protocol,
Parcelable[] endpoints) {
mId = id;
mClass = Class;
mSubclass = subClass;
mProtocol = protocol;
mEndpoints = endpoints;
}
/**
* Returns the interface's ID field.
* This is an integer that uniquely identifies the interface on the device.
*
* @return the interface's ID
*/
public int getId() {
return mId;
}
/**
* Returns the interface's class field.
* Some useful constants for USB classes can be found in {@link UsbConstants}
*
* @return the interface's class
*/
public int getInterfaceClass() {
return mClass;
}
/**
* Returns the interface's subclass field.
*
* @return the interface's subclass
*/
public int getInterfaceSubclass() {
return mSubclass;
}
/**
* Returns the interface's protocol field.
*
* @return the interface's protocol
*/
public int getInterfaceProtocol() {
return mProtocol;
}
/**
* Returns the number of {@link android.hardware.usb.UsbEndpoint}s this interface contains.
*
* @return the number of endpoints
*/
public int getEndpointCount() {
return mEndpoints.length;
}
/**
* Returns the {@link android.hardware.usb.UsbEndpoint} at the given index.
*
* @return the endpoint
*/
public UsbEndpoint getEndpoint(int index) {
return (UsbEndpoint)mEndpoints[index];
}
@Override
public String toString() {
return "UsbInterface[mId=" + mId + ",mClass=" + mClass +
",mSubclass=" + mSubclass + ",mProtocol=" + mProtocol +
",mEndpoints=" + mEndpoints + "]";
}
public static final Parcelable.Creator<UsbInterface> CREATOR =
new Parcelable.Creator<UsbInterface>() {
public UsbInterface createFromParcel(Parcel in) {
int id = in.readInt();
int Class = in.readInt();
int subClass = in.readInt();
int protocol = in.readInt();
Parcelable[] endpoints = in.readParcelableArray(UsbEndpoint.class.getClassLoader());
return new UsbInterface(id, Class, subClass, protocol, endpoints);
}
public UsbInterface[] newArray(int size) {
return new UsbInterface[size];
}
};
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel parcel, int flags) {
parcel.writeInt(mId);
parcel.writeInt(mClass);
parcel.writeInt(mSubclass);
parcel.writeInt(mProtocol);
parcel.writeParcelableArray(mEndpoints, 0);
}
}
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