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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.app.timezone;
     18 
     19 import static android.app.timezone.Utils.validateRulesVersion;
     20 import static android.app.timezone.Utils.validateVersion;
     21 
     22 import android.os.Parcel;
     23 import android.os.Parcelable;
     24 
     25 /**
     26  * Versioning information about a set of time zone rules.
     27  *
     28  * <p>The following properties are included:
     29  * <dl>
     30  *     <dt>rulesVersion</dt>
     31  *     <dd>the IANA rules version. e.g. "2017a"</dd>
     32  *     <dt>revision</dt>
     33  *     <dd>the revision for the rules. Allows there to be several revisions for a given IANA rules
     34  *     release. Numerically higher is newer.</dd>
     35  * </dl>
     36  *
     37  * @hide
     38  */
     39 public final class DistroRulesVersion implements Parcelable {
     40 
     41     private final String mRulesVersion;
     42     private final int mRevision;
     43 
     44     public DistroRulesVersion(String rulesVersion, int revision) {
     45         mRulesVersion = validateRulesVersion("rulesVersion", rulesVersion);
     46         mRevision = validateVersion("revision", revision);
     47     }
     48 
     49     public static final Creator<DistroRulesVersion> CREATOR = new Creator<DistroRulesVersion>() {
     50         public DistroRulesVersion createFromParcel(Parcel in) {
     51             String rulesVersion = in.readString();
     52             int revision = in.readInt();
     53             return new DistroRulesVersion(rulesVersion, revision);
     54         }
     55 
     56         public DistroRulesVersion[] newArray(int size) {
     57             return new DistroRulesVersion[size];
     58         }
     59     };
     60 
     61     public String getRulesVersion() {
     62         return mRulesVersion;
     63     }
     64 
     65     public int getRevision() {
     66         return mRevision;
     67     }
     68 
     69     /**
     70      * Returns true if this DistroRulesVersion is older than the one supplied. It returns false if
     71      * it is the same or newer. This method compares the {@code rulesVersion} and the
     72      * {@code revision}.
     73      */
     74     public boolean isOlderThan(DistroRulesVersion distroRulesVersion) {
     75         int rulesComparison = mRulesVersion.compareTo(distroRulesVersion.mRulesVersion);
     76         if (rulesComparison < 0) {
     77             return true;
     78         }
     79         if (rulesComparison > 0) {
     80             return false;
     81         }
     82         return mRevision < distroRulesVersion.mRevision;
     83     }
     84 
     85     @Override
     86     public int describeContents() {
     87         return 0;
     88     }
     89 
     90     @Override
     91     public void writeToParcel(Parcel out, int flags) {
     92         out.writeString(mRulesVersion);
     93         out.writeInt(mRevision);
     94     }
     95 
     96     @Override
     97     public boolean equals(Object o) {
     98         if (this == o) {
     99             return true;
    100         }
    101         if (o == null || getClass() != o.getClass()) {
    102             return false;
    103         }
    104 
    105         DistroRulesVersion that = (DistroRulesVersion) o;
    106 
    107         if (mRevision != that.mRevision) {
    108             return false;
    109         }
    110         return mRulesVersion.equals(that.mRulesVersion);
    111     }
    112 
    113     @Override
    114     public int hashCode() {
    115         int result = mRulesVersion.hashCode();
    116         result = 31 * result + mRevision;
    117         return result;
    118     }
    119 
    120     @Override
    121     public String toString() {
    122         return "DistroRulesVersion{"
    123                 + "mRulesVersion='" + mRulesVersion + '\''
    124                 + ", mRevision='" + mRevision + '\''
    125                 + '}';
    126     }
    127 
    128     public String toDumpString() {
    129         return mRulesVersion + "," + mRevision;
    130     }
    131 }
    132