/*
* Copyright (C) 2014 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.net;
import android.os.Parcel;
import android.os.Parcelable;
import java.util.concurrent.atomic.AtomicInteger;
/**
* Defines a request for a network, made through {@link NetworkRequest.Builder} and used
* to request a network via {@link ConnectivityManager#requestNetwork} or listen for changes
* via {@link ConnectivityManager#registerNetworkCallback}.
*/
public class NetworkRequest implements Parcelable {
/**
* The {@link NetworkCapabilities} that define this request.
* @hide
*/
public final NetworkCapabilities networkCapabilities;
/**
* Identifies the request. NetworkRequests should only be constructed by
* the Framework and given out to applications as tokens to be used to identify
* the request.
* @hide
*/
public final int requestId;
/**
* Set for legacy requests and the default. Set to TYPE_NONE for none.
* Causes CONNECTIVITY_ACTION broadcasts to be sent.
* @hide
*/
public final int legacyType;
/**
* @hide
*/
public NetworkRequest(NetworkCapabilities nc, int legacyType, int rId) {
if (nc == null) {
throw new NullPointerException();
}
requestId = rId;
networkCapabilities = nc;
this.legacyType = legacyType;
}
/**
* @hide
*/
public NetworkRequest(NetworkRequest that) {
networkCapabilities = new NetworkCapabilities(that.networkCapabilities);
requestId = that.requestId;
this.legacyType = that.legacyType;
}
/**
* Builder used to create {@link NetworkRequest} objects. Specify the Network features
* needed in terms of {@link NetworkCapabilities} features
*/
public static class Builder {
private final NetworkCapabilities mNetworkCapabilities = new NetworkCapabilities();
/**
* Default constructor for Builder.
*/
public Builder() {}
/**
* Build {@link NetworkRequest} give the current set of capabilities.
*/
public NetworkRequest build() {
return new NetworkRequest(mNetworkCapabilities, ConnectivityManager.TYPE_NONE,
ConnectivityManager.REQUEST_ID_UNSET);
}
/**
* Add the given capability requirement to this builder. These represent
* the requested network's required capabilities. Note that when searching
* for a network to satisfy a request, all capabilities requested must be
* satisfied. See {@link NetworkCapabilities} for {@code NET_CAPABILITIY_*}
* definitions.
*
* @param capability The {@code NetworkCapabilities.NET_CAPABILITY_*} to add.
* @return The builder to facilitate chaining
* {@code builder.addCapability(...).addCapability();}.
*/
public Builder addCapability(int capability) {
mNetworkCapabilities.addCapability(capability);
return this;
}
/**
* Removes (if found) the given capability from this builder instance.
*
* @param capability The {@code NetworkCapabilities.NET_CAPABILITY_*} to remove.
* @return The builder to facilitate chaining.
*/
public Builder removeCapability(int capability) {
mNetworkCapabilities.removeCapability(capability);
return this;
}
/**
* Adds the given transport requirement to this builder. These represent
* the set of allowed transports for the request. Only networks using one
* of these transports will satisfy the request. If no particular transports
* are required, none should be specified here. See {@link NetworkCapabilities}
* for {@code TRANSPORT_*} definitions.
*
* @param transportType The {@code NetworkCapabilities.TRANSPORT_*} to add.
* @return The builder to facilitate chaining.
*/
public Builder addTransportType(int transportType) {
mNetworkCapabilities.addTransportType(transportType);
return this;
}
/**
* Removes (if found) the given transport from this builder instance.
*
* @param transportType The {@code NetworkCapabilities.TRANSPORT_*} to remove.
* @return The builder to facilitate chaining.
*/
public Builder removeTransportType(int transportType) {
mNetworkCapabilities.removeTransportType(transportType);
return this;
}
/**
* @hide
*/
public Builder setLinkUpstreamBandwidthKbps(int upKbps) {
mNetworkCapabilities.setLinkUpstreamBandwidthKbps(upKbps);
return this;
}
/**
* @hide
*/
public Builder setLinkDownstreamBandwidthKbps(int downKbps) {
mNetworkCapabilities.setLinkDownstreamBandwidthKbps(downKbps);
return this;
}
/**
* Sets the optional bearer specific network specifier.
* This has no meaning if a single transport is also not specified, so calling
* this without a single transport set will generate an exception, as will
* subsequently adding or removing transports after this is set.
* </p>
* The interpretation of this {@code String} is bearer specific and bearers that use
* it should document their particulars. For example, Bluetooth may use some sort of
* device id while WiFi could used ssid and/or bssid. Cellular may use carrier spn.
*
* @param networkSpecifier An {@code String} of opaque format used to specify the bearer
* specific network specifier where the bearer has a choice of
* networks.
*/
public Builder setNetworkSpecifier(String networkSpecifier) {
mNetworkCapabilities.setNetworkSpecifier(networkSpecifier);
return this;
}
}
// implement the Parcelable interface
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel dest, int flags) {
dest.writeParcelable(networkCapabilities, flags);
dest.writeInt(legacyType);
dest.writeInt(requestId);
}
public static final Creator<NetworkRequest> CREATOR =
new Creator<NetworkRequest>() {
public NetworkRequest createFromParcel(Parcel in) {
NetworkCapabilities nc = (NetworkCapabilities)in.readParcelable(null);
int legacyType = in.readInt();
int requestId = in.readInt();
NetworkRequest result = new NetworkRequest(nc, legacyType, requestId);
return result;
}
public NetworkRequest[] newArray(int size) {
return new NetworkRequest[size];
}
};
public String toString() {
return "NetworkRequest [ id=" + requestId + ", legacyType=" + legacyType +
", " + networkCapabilities.toString() + " ]";
}
public boolean equals(Object obj) {
if (obj instanceof NetworkRequest == false) return false;
NetworkRequest that = (NetworkRequest)obj;
return (that.legacyType == this.legacyType &&
that.requestId == this.requestId &&
((that.networkCapabilities == null && this.networkCapabilities == null) ||
(that.networkCapabilities != null &&
that.networkCapabilities.equals(this.networkCapabilities))));
}
public int hashCode() {
return requestId + (legacyType * 1013) +
(networkCapabilities.hashCode() * 1051);
}
}
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