330 lines
10 KiB
Java
330 lines
10 KiB
Java
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.telephony;
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import static android.text.TextUtils.formatSimple;
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import android.annotation.NonNull;
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import android.annotation.Nullable;
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import android.compat.annotation.UnsupportedAppUsage;
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import android.os.Build;
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import android.os.Parcel;
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import android.telephony.gsm.GsmCellLocation;
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import android.text.TextUtils;
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import android.util.ArraySet;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.Objects;
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import java.util.Set;
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/**
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* CellIdentity to represent a unique GSM cell
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*/
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public final class CellIdentityGsm extends CellIdentity {
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private static final String TAG = CellIdentityGsm.class.getSimpleName();
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private static final boolean DBG = false;
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private static final int MAX_LAC = 65535;
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private static final int MAX_CID = 65535;
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private static final int MAX_ARFCN = 65535;
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private static final int MAX_BSIC = 63;
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// 16-bit Location Area Code, 0..65535
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private final int mLac;
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// 16-bit GSM Cell Identity described in TS 27.007, 0..65535
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private final int mCid;
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// 16-bit GSM Absolute RF Channel Number
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private final int mArfcn;
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// 6-bit Base Station Identity Code
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private final int mBsic;
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// a list of additional PLMN-IDs reported for this cell
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private final ArraySet<String> mAdditionalPlmns;
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/**
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* @hide
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*/
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@UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
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public CellIdentityGsm() {
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super(TAG, CellInfo.TYPE_GSM, null, null, null, null);
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mLac = CellInfo.UNAVAILABLE;
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mCid = CellInfo.UNAVAILABLE;
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mArfcn = CellInfo.UNAVAILABLE;
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mBsic = CellInfo.UNAVAILABLE;
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mAdditionalPlmns = new ArraySet<>();
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mGlobalCellId = null;
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}
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/**
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* public constructor
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* @param lac 16-bit Location Area Code, 0..65535
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* @param cid 16-bit GSM Cell Identity or 28-bit UMTS Cell Identity
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* @param arfcn 16-bit GSM Absolute RF Channel Number
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* @param bsic 6-bit Base Station Identity Code
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* @param mccStr 3-digit Mobile Country Code in string format
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* @param mncStr 2 or 3-digit Mobile Network Code in string format
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* @param alphal long alpha Operator Name String or Enhanced Operator Name String
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* @param alphas short alpha Operator Name String or Enhanced Operator Name String
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* @param additionalPlmns a list of additional PLMN IDs broadcast by the cell
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*
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* @hide
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*/
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public CellIdentityGsm(int lac, int cid, int arfcn, int bsic, @Nullable String mccStr,
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@Nullable String mncStr, @Nullable String alphal, @Nullable String alphas,
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@NonNull Collection<String> additionalPlmns) {
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super(TAG, CellInfo.TYPE_GSM, mccStr, mncStr, alphal, alphas);
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mLac = inRangeOrUnavailable(lac, 0, MAX_LAC);
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mCid = inRangeOrUnavailable(cid, 0, MAX_CID);
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mArfcn = inRangeOrUnavailable(arfcn, 0, MAX_ARFCN);
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mBsic = inRangeOrUnavailable(bsic, 0, MAX_BSIC);
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mAdditionalPlmns = new ArraySet<>(additionalPlmns.size());
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for (String plmn : additionalPlmns) {
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if (isValidPlmn(plmn)) {
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mAdditionalPlmns.add(plmn);
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}
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}
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updateGlobalCellId();
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}
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private CellIdentityGsm(@NonNull CellIdentityGsm cid) {
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this(cid.mLac, cid.mCid, cid.mArfcn, cid.mBsic, cid.mMccStr,
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cid.mMncStr, cid.mAlphaLong, cid.mAlphaShort, cid.mAdditionalPlmns);
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}
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@NonNull CellIdentityGsm copy() {
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return new CellIdentityGsm(this);
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}
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/** @hide */
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@Override
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public @NonNull CellIdentityGsm sanitizeLocationInfo() {
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return new CellIdentityGsm(CellInfo.UNAVAILABLE, CellInfo.UNAVAILABLE, CellInfo.UNAVAILABLE,
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CellInfo.UNAVAILABLE, mMccStr, mMncStr, mAlphaLong, mAlphaShort, mAdditionalPlmns);
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}
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/** @hide */
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@Override
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protected void updateGlobalCellId() {
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mGlobalCellId = null;
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String plmn = getPlmn();
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if (plmn == null) return;
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if (mLac == CellInfo.UNAVAILABLE || mCid == CellInfo.UNAVAILABLE) return;
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mGlobalCellId = plmn + formatSimple("%04x%04x", mLac, mCid);
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}
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/**
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* @return 3-digit Mobile Country Code, 0..999,
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* {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable.
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* @deprecated Use {@link #getMccString} instead.
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*/
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@Deprecated
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public int getMcc() {
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return (mMccStr != null) ? Integer.valueOf(mMccStr) : CellInfo.UNAVAILABLE;
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}
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/**
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* @return 2 or 3-digit Mobile Network Code, 0..999,
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* {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable.
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* @deprecated Use {@link #getMncString} instead.
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*/
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@Deprecated
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public int getMnc() {
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return (mMncStr != null) ? Integer.valueOf(mMncStr) : CellInfo.UNAVAILABLE;
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}
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/**
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* @return 16-bit Location Area Code, 0..65535,
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* {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable.
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*/
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public int getLac() {
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return mLac;
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}
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/**
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* @return 16-bit GSM Cell Identity described in TS 27.007, 0..65535,
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* {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable.
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*/
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public int getCid() {
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return mCid;
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}
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/**
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* @return 16-bit GSM Absolute RF Channel Number,
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* {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable.
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*/
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public int getArfcn() {
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return mArfcn;
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}
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/**
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* @return 6-bit Base Station Identity Code,
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* {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable.
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*/
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public int getBsic() {
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return mBsic;
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}
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/**
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* @return a 5 or 6 character string (MCC+MNC), null if any field is unknown.
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*/
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@Nullable
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public String getMobileNetworkOperator() {
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return (mMccStr == null || mMncStr == null) ? null : mMccStr + mMncStr;
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}
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/**
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* @return Mobile Country Code in string format, null if unavailable.
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*/
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@Nullable
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public String getMccString() {
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return mMccStr;
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}
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/**
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* @return Mobile Network Code in string format, null if unavailable.
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*/
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@Nullable
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public String getMncString() {
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return mMncStr;
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}
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/** @hide */
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@Override
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public int getChannelNumber() {
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return mArfcn;
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}
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/**
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* @return a list of additional PLMN IDs supported by this cell.
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*/
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@NonNull
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public Set<String> getAdditionalPlmns() {
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return Collections.unmodifiableSet(mAdditionalPlmns);
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}
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/**
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* @deprecated Primary Scrambling Code is not applicable to GSM.
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* @return {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} - undefined for GSM
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*/
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@Deprecated
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public int getPsc() {
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return CellInfo.UNAVAILABLE;
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}
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/** @hide */
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@NonNull
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@Override
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public GsmCellLocation asCellLocation() {
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GsmCellLocation cl = new GsmCellLocation();
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int lac = mLac != CellInfo.UNAVAILABLE ? mLac : -1;
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int cid = mCid != CellInfo.UNAVAILABLE ? mCid : -1;
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cl.setLacAndCid(lac, cid);
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cl.setPsc(-1);
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return cl;
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}
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@Override
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public int hashCode() {
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return Objects.hash(mLac, mCid, mAdditionalPlmns.hashCode(), super.hashCode());
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}
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@Override
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public boolean equals(Object other) {
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if (this == other) {
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return true;
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}
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if (!(other instanceof CellIdentityGsm)) {
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return false;
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}
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CellIdentityGsm o = (CellIdentityGsm) other;
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return mLac == o.mLac
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&& mCid == o.mCid
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&& mArfcn == o.mArfcn
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&& mBsic == o.mBsic
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&& TextUtils.equals(mMccStr, o.mMccStr)
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&& TextUtils.equals(mMncStr, o.mMncStr)
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&& mAdditionalPlmns.equals(o.mAdditionalPlmns)
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&& super.equals(other);
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}
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@Override
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public String toString() {
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return new StringBuilder(TAG)
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.append(":{ mLac=").append(mLac)
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.append(" mCid=").append(mCid)
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.append(" mArfcn=").append(mArfcn)
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.append(" mBsic=").append("0x").append(Integer.toHexString(mBsic))
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.append(" mMcc=").append(mMccStr)
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.append(" mMnc=").append(mMncStr)
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.append(" mAlphaLong=").append(mAlphaLong)
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.append(" mAlphaShort=").append(mAlphaShort)
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.append(" mAdditionalPlmns=").append(mAdditionalPlmns)
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.append("}").toString();
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}
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/** Implement the Parcelable interface */
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@Override
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public void writeToParcel(Parcel dest, int flags) {
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if (DBG) log("writeToParcel(Parcel, int): " + toString());
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super.writeToParcel(dest, CellInfo.TYPE_GSM);
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dest.writeInt(mLac);
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dest.writeInt(mCid);
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dest.writeInt(mArfcn);
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dest.writeInt(mBsic);
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dest.writeArraySet(mAdditionalPlmns);
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}
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/** Construct from Parcel, type has already been processed */
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private CellIdentityGsm(Parcel in) {
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super(TAG, CellInfo.TYPE_GSM, in);
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mLac = in.readInt();
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mCid = in.readInt();
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mArfcn = in.readInt();
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mBsic = in.readInt();
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mAdditionalPlmns = (ArraySet<String>) in.readArraySet(null);
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updateGlobalCellId();
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if (DBG) log(toString());
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}
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/** Implement the Parcelable interface */
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@SuppressWarnings("hiding")
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public static final @android.annotation.NonNull Creator<CellIdentityGsm> CREATOR =
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new Creator<CellIdentityGsm>() {
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@Override
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public CellIdentityGsm createFromParcel(Parcel in) {
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in.readInt(); // skip
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return createFromParcelBody(in);
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}
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@Override
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public CellIdentityGsm[] newArray(int size) {
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return new CellIdentityGsm[size];
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}
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};
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/** @hide */
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protected static CellIdentityGsm createFromParcelBody(Parcel in) {
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return new CellIdentityGsm(in);
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}
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}
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