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/*
* Copyright (C) 2007 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.content;
import android.net.Uri;
/**
* Utility methods useful for working with content {@link android.net.Uri}s,
* those with a "content" scheme.
*/
public class ContentUris {
/**
* Converts the last path segment to a long.
*
* <p>This supports a common convention for content URIs where an ID is
* stored in the last segment.
*
* @throws UnsupportedOperationException if this isn't a hierarchical URI
* @throws NumberFormatException if the last segment isn't a number
*
* @return the long conversion of the last segment or -1 if the path is
* empty
*/
public static long parseId(Uri contentUri) {
String last = contentUri.getLastPathSegment();
return last == null ? -1 : Long.parseLong(last);
}
/**
* Appends the given ID to the end of the path.
*
* @param builder to append the ID to
* @param id to append
*
* @return the given builder
*/
public static Uri.Builder appendId(Uri.Builder builder, long id) {
return builder.appendEncodedPath(String.valueOf(id));
}
/**
* Appends the given ID to the end of the path.
*
* @param contentUri to start with
* @param id to append
*
* @return a new URI with the given ID appended to the end of the path
*/
public static Uri withAppendedId(Uri contentUri, long id) {
return appendId(contentUri.buildUpon(), id).build();
}
}
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