1 /* 2 * Copyright (C) 2007 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.content; 18 19 import android.net.Uri; 20 21 /** 22 * Utility methods useful for working with content {@link android.net.Uri}s, 23 * those with a "content" scheme. 24 */ 25 public class ContentUris { 26 27 /** 28 * Converts the last path segment to a long. 29 * 30 * <p>This supports a common convention for content URIs where an ID is 31 * stored in the last segment. 32 * 33 * @throws UnsupportedOperationException if this isn't a hierarchical URI 34 * @throws NumberFormatException if the last segment isn't a number 35 * 36 * @return the long conversion of the last segment or -1 if the path is 37 * empty 38 */ parseId(Uri contentUri)39 public static long parseId(Uri contentUri) { 40 String last = contentUri.getLastPathSegment(); 41 return last == null ? -1 : Long.parseLong(last); 42 } 43 44 /** 45 * Appends the given ID to the end of the path. 46 * 47 * @param builder to append the ID to 48 * @param id to append 49 * 50 * @return the given builder 51 */ appendId(Uri.Builder builder, long id)52 public static Uri.Builder appendId(Uri.Builder builder, long id) { 53 return builder.appendEncodedPath(String.valueOf(id)); 54 } 55 56 /** 57 * Appends the given ID to the end of the path. 58 * 59 * @param contentUri to start with 60 * @param id to append 61 * 62 * @return a new URI with the given ID appended to the end of the path 63 */ withAppendedId(Uri contentUri, long id)64 public static Uri withAppendedId(Uri contentUri, long id) { 65 return appendId(contentUri.buildUpon(), id).build(); 66 } 67 } 68