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      1 /*
      2  * Copyright (C) 2011 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 com.android.contacts.common.util;
     18 
     19 import android.net.Uri;
     20 import android.provider.ContactsContract;
     21 
     22 /**
     23  * Utility methods for dealing with URIs.
     24  */
     25 public class UriUtils {
     26     /** Static helper, not instantiable. */
     27     private UriUtils() {}
     28 
     29     /** Checks whether two URI are equal, taking care of the case where either is null. */
     30     public static boolean areEqual(Uri uri1, Uri uri2) {
     31         if (uri1 == null && uri2 == null) {
     32             return true;
     33         }
     34         if (uri1 == null || uri2 == null) {
     35             return false;
     36         }
     37         return uri1.equals(uri2);
     38     }
     39 
     40     /** Parses a string into a URI and returns null if the given string is null. */
     41     public static Uri parseUriOrNull(String uriString) {
     42         if (uriString == null) {
     43             return null;
     44         }
     45         return Uri.parse(uriString);
     46     }
     47 
     48     /** Converts a URI into a string, returns null if the given URI is null. */
     49     public static String uriToString(Uri uri) {
     50         return uri == null ? null : uri.toString();
     51     }
     52 
     53     public static boolean isEncodedContactUri(Uri uri) {
     54         if (uri == null) {
     55             return false;
     56         }
     57         final String lastPathSegment = uri.getLastPathSegment();
     58         if (lastPathSegment == null) {
     59             return false;
     60         }
     61         return lastPathSegment.equals(Constants.LOOKUP_URI_ENCODED);
     62     }
     63 
     64     /**
     65      * @return {@code uri} as-is if the authority is of contacts provider.  Otherwise
     66      * or {@code uri} is null, return null otherwise
     67      */
     68     public static Uri nullForNonContactsUri(Uri uri) {
     69         if (uri == null) {
     70             return null;
     71         }
     72         return ContactsContract.AUTHORITY.equals(uri.getAuthority()) ? uri : null;
     73     }
     74 }
     75